Author Topic: Guess the horsepower game, Ford 311 SBF  (Read 4868 times)

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blykins

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Guess the horsepower game, Ford 311 SBF
« on: April 16, 2022, 05:04:08 AM »
I've already dyno'd this one and I'm hosting a "guess the horsepower" game on my YouTube channel with a prize for the winner.   I'll host a separate game here for you guys, with the prize being an adjustable FE timing pointer for the winner.   (Ross and Joe Craine, you guys are ineligible....hahaha)

Since the other game is going on concurrently, you will have until 5PM EST on next Friday to put in your guess.

Rule is closest on horsepower without going over.

Here's the engine:











*2001 factory Ford 5.0 block, Hard-Blok'd to the bottoms of the water pump holes
*4.060" finished bore size
*Eagle 4340 3" stroke crankshaft (Yes, I know it's an Eagle, but I literally bought this new crankshaft for $200)
*R&R 5.700" aluminum connecting rods
*Racetec custom pistons, 3.5cc flat top, vertical gas ports, Mahle 1mm/1mm/2mm ring pack
*Coated Clevite main/rod bearings, coated Durabond cam bearings
*Cloyes billet timing chain
*Melling Select standard volume oil pump
*Milodon Fox body oil pan and pickup
*Powerbond harmonic balancer
*Milodon aluminum water pump (driven electrically on dyno)
*Camshaft is a Lykins Motorsports custom solid roller, 239/247 @ .050", .544" net lift, 108 LSA, 100 ICL
*AFR Renegade 185cc heads, milled to 54.4cc, no port work
*PAC valve springs, 280lbs seat, 600 lbs open, with PAC titanium retainers (all of this was from Junky Junk, JJ lives on!!!!)
*BAM needle bearing lifters
*Jesel shaft mounted rockers
*Smith Brothers 7/16", .165" wall pushrods on exhaust side, 3/8", .135" wall pushrods on intake side
*Intake is a fully ported Victor Jr., done by Joe Craine
*Distributor is locked out MSD Pro Billet
*Carb is Quick Fuel Q-750
*Headers were 1-3/4" x 36", with 3.5" collector.  Header vac tubes were used.

We made a total of 17 pulls yesterday, trying all different kinds of spacers, combinations of spacers, lash, timing, etc.  I will tell you that from the time we started to the time we quit, we added almost 80 hp from tuning.  I gained a lot of data yesterday about some new cam lobes that I'm trying, along with aluminum rod bearing clearances and piston/valve clearances.  You don't know until you try.....

Do your best, gentlemen.   

Here's the YouTube video that outlines the contest that I'm having on there, along with a dyno pull.   Pay no attention to the rules there, they are different than the rules here.

https://www.youtube.com/watch?v=yhplzdfyBIY
Brent Lykins
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machoneman

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #1 on: April 16, 2022, 06:16:35 AM »
487 HP. 1.57 hp/CID.
Bob Maag

Heo

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #2 on: April 16, 2022, 06:33:33 AM »
478



The defenition of a Gentleman, is a man that can play the accordion.But dont do it

My427stang

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #3 on: April 16, 2022, 08:11:01 AM »
Crap, I felt really lucky this time :)
---------------------------------
Ross
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Joe-JDC

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #4 on: April 16, 2022, 08:52:57 AM »
Let's see.  302HO with carb instead of EFI, 225 hp, add 25 for carb, and you found 80 extra, 320?  Sound about right? Add 10 for valve covers, and there you have it, 330 hp.   ;D  Joe-JDC
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cleandan

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #5 on: April 16, 2022, 12:21:16 PM »
I'm going to cheat and use Joe's calculations to better my guess.
It sounds like you let it rev pretty high.
It also pulled the dyno load very nicely.

The horse power is.....wait for it......551.68.

frnkeore

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #6 on: April 16, 2022, 03:10:53 PM »
506 @6900

Oops, had to big of a carb on it, 492 @6800
« Last Edit: April 16, 2022, 03:32:35 PM by frnkeore »
Frank

blykins

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #7 on: April 16, 2022, 03:41:46 PM »
506 @6900

Oops, had to big of a carb on it, 492 @6800

You better bolt that big carb back on it.
Brent Lykins
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70tp

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #8 on: April 16, 2022, 06:08:26 PM »
512

Rory428

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #9 on: April 16, 2022, 07:09:22 PM »
497 HP
1978 Fairmont,FE 427 with 428 crank, 4 speed Jerico best of 9.972@132.54MPH 1.29 60 foot
1985 Mustang HB 331 SB Ford, 4 speed Jerico, best of 10.29@128 MPH 1.40 60 foot.
1974 F350 race car hauler 390 NP435 4 speed
1959 Ford Meteor 2 dr sedan. 428 Cobra Jet, 4 speed Toploader. 12.54@ 108 MPH

Stangman

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #10 on: April 16, 2022, 08:48:20 PM »
Nice Brent I just watched your video and I like your attention to detail.

506 HP
479 LBS TQ


mike7570

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #11 on: April 16, 2022, 09:12:32 PM »
506 @6900

Oops, had to big of a carb on it, 492 @6800

You better bolt that big carb back on it.
Is that a hint?
Okay 511hp

ToddK

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #12 on: April 16, 2022, 10:52:53 PM »
514hp

turbohunter

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #13 on: April 17, 2022, 06:25:26 AM »
The thing that strikes me is you added 80hp with tuning. Whoa.

Oops forgot to guess.
Stangman  took my number sooooooo…….I’ll go a bit more for fun 509hp, 475tq.
« Last Edit: April 17, 2022, 07:46:13 AM by turbohunter »
Marc
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blykins

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #14 on: April 17, 2022, 06:43:06 AM »
The thing that strikes me is you added 80hp with tuning. Whoa.

Between timing sweeps, lash changes, header vacs, and spacer combinations, we just kept inching up the power. 

We had a total of 5 spacers there....a 1" HVH Super Sucker, a 2" HVH Super Sucker, a 1.5" Wilson tapered spacer, a 1/4" phenolic 4-hole, and a 1/2" phenolic 4-hole.  We just kept doing incremental changes and watched the power climb. 

The lobes I used were very aggressive and I typically wouldn't use them for anything else but a "run what you brung" type situation.  They make a lot of power and torque though.

This engine was just a test bed for different things that people say you can't do.  People advise not to run tighter than .0025-.0030" on aluminum rod bearing clearances.  I ran .0018-.0020".   People also advise not to run anything under .100" exhaust piston/valve clearance.  I ran .078", in combination with a .039" piston/head clearance. 

Everything worked really well and surprised me.
Brent Lykins
Lykins Motorsports
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machoneman

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #15 on: April 17, 2022, 07:51:07 AM »
O.K. Brent but when do we get the big reveal?  ;D
Bob Maag

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #16 on: April 17, 2022, 09:20:07 AM »
517

frnkeore

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #17 on: April 17, 2022, 11:18:48 AM »
I see that you used the TK Limited Lift rollers, small carb and lower rpm build. Was this for some kind of class racing?
Frank

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #18 on: April 17, 2022, 12:05:05 PM »
This engine is for me.  If I don’t try different things, I won’t be able to pass on information and engine combinations to customers.

Since I specialize in custom camshafts for Fords, I spec’d 3 cams to try.  I chose that one at the end, just to show that high lift doesn’t always need to be used to make big power. 

The engine is not low rpm.  You just guessed wrong.  :)

Also, we tried an 830 Holley and lost power.  Sometimes “small carbs”  are best.

Brent Lykins
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Gaugster

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #19 on: April 17, 2022, 02:19:24 PM »
499.95hp
 8)
John - '68 Cougar XR7 390 FE (X-Code) 6R80 AUTO

shady

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #20 on: April 18, 2022, 08:51:59 AM »
An Olds 442 drove by my shop this morning, so a sign from above?     442
What goes fast doesn't go fast long'
What goes fast takes your money with it.
So I'm slow & broke, what went wrong?
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Stangman

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #21 on: April 18, 2022, 01:00:25 PM »
Brent was cuious about the weight difference between the aluminum rods and the rod that you would normally use.
Ya know you hear alot od conflicting stuff about aluminum rods. How many passes can you get out of them and some people
say you can run them on the street cause they have come a long way from years ago.
Whats your pearls of wisdom say

blykins

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #22 on: April 18, 2022, 01:20:41 PM »
Brent was cuious about the weight difference between the aluminum rods and the rod that you would normally use.
Ya know you hear alot od conflicting stuff about aluminum rods. How many passes can you get out of them and some people
say you can run them on the street cause they have come a long way from years ago.
Whats your pearls of wisdom say

These 5.700" rods were about 100g lighter than the Molnar 5.400" rods that I normally use.  As another comparison, a steel 5.700" Molnar SBC rod weighs about 137g more. 

Aluminum rods have come a very long way.  BME (Bill Miller Engineering) has a few shop trucks that have 100k miles on the clock with aluminum rods.  R&R is who made these custom rods for me and he said that he has aluminum rods in all kinds of street engines. 

This was one of the lightest bobweights I've seen.  I'm sure some of the Super Stock guys have messed with weights less than this, but my bobweight was only 1423g.  I did have to notch the cylinders on one side for rod bolt clearance.  I used a 3" stroke crankshaft, so that does go to show how much larger the aluminum rods are in the big end.



If you allow for rod stretch under heat, adjust bearing clearances accordingly, and allow time for the engine to warm up properly, I honestly don't see the issue.

« Last Edit: April 18, 2022, 01:23:18 PM by blykins »
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frnkeore

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #23 on: April 18, 2022, 01:35:49 PM »
Was the crank neutral or 28 oz balance?
Frank

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #24 on: April 18, 2022, 03:33:50 PM »
In this application what is the benifit besides the obvious weight difference.
Or is that the only reason. I would think maybe the high RPM revving capability is the other reason.
Does R&R think these are stronger than a steel rod?

Joe-JDC

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #25 on: April 18, 2022, 03:38:57 PM »
Brent, on the Eagle crankshaft, the local shop that I have been doing business with for the past 35 years uses/used the Eagle crankshafts in more engines than I can count.  The only negative I have heard with Eagle is the FE crankshaft.  I use the Eagle rods in my 595 hp Y Block, and in several of my Windsor stroker engines.  On the really serious SBFs I use the Scat, or Callies.  Scat has a very good lightweight forging with extra lightning of the throws.  Scat also will custom build a SBF with Honda journals, or even the VW which is even smaller.  Not cheap, though at $2400.00 up.   My Moldex with Honda journals was $3300.00, so your $200.00 crankshaft was a bargain.  Joe-JDC 
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blykins

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #26 on: April 18, 2022, 04:35:51 PM »
In this application what is the benifit besides the obvious weight difference.
Or is that the only reason. I would think maybe the high RPM revving capability is the other reason.
Does R&R think these are stronger than a steel rod?

They are lighter.  But they are also custom length, so that lets me use a much longer rod than what most guys use in this combination.  More importantly, that let's me use a lot lighter piston than what most guys use.  A typical Ford 302 piston compression height is around 1.600".  Mine are .990".  Yes, under an inch. 

Brent Lykins
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blykins

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #27 on: April 18, 2022, 04:38:04 PM »
Brent, on the Eagle crankshaft, the local shop that I have been doing business with for the past 35 years uses/used the Eagle crankshafts in more engines than I can count.  The only negative I have heard with Eagle is the FE crankshaft.  I use the Eagle rods in my 595 hp Y Block, and in several of my Windsor stroker engines.  On the really serious SBFs I use the Scat, or Callies.  Scat has a very good lightweight forging with extra lightning of the throws.  Scat also will custom build a SBF with Honda journals, or even the VW which is even smaller.  Not cheap, though at $2400.00 up.   My Moldex with Honda journals was $3300.00, so your $200.00 crankshaft was a bargain.  Joe-JDC

Joe, I know a lot of shops use Eagle, but I just can't make myself do it for customer builds.  I bought 2 BBF Eagle cranks about 15 years ago and they both came in with pitted journals.  A few years later, Keith Craft had a handful of Eagle crank failures in FE's, where they broke at the 1/5 rod journal.   I just couldn't make myself take a chance. 

I'm cheap on my own stuff, and if it broke, I wouldn't have to explain it to a customer.
Brent Lykins
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Rory428

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #28 on: April 18, 2022, 08:29:51 PM »
I know several guys that have had issues with Eagle crankshafts and connecting rods in FE engines, but I must say, the cast 3.25" crank, and Eagle rods, in my old 331 SB Ford , has hundreds of mid-low 10 second 1/4 mile passes, shifting at 6800 RPM, and hitting over 7000 across the finish line, with zero issues. And according to the guy that bought the engine from my a year and 1/2 ago, it is still running fine. That said, a buddy did have a Scat 3.25" cast SBF crank that ate the thrust surface after a couple of years of racing. I still wouldn`t trust Eagle stuff in a FE,  but for a SB Ford, I would consider them.
1978 Fairmont,FE 427 with 428 crank, 4 speed Jerico best of 9.972@132.54MPH 1.29 60 foot
1985 Mustang HB 331 SB Ford, 4 speed Jerico, best of 10.29@128 MPH 1.40 60 foot.
1974 F350 race car hauler 390 NP435 4 speed
1959 Ford Meteor 2 dr sedan. 428 Cobra Jet, 4 speed Toploader. 12.54@ 108 MPH

blykins

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #29 on: April 19, 2022, 05:27:28 AM »
I know several guys that have had issues with Eagle crankshafts and connecting rods in FE engines, but I must say, the cast 3.25" crank, and Eagle rods, in my old 331 SB Ford , has hundreds of mid-low 10 second 1/4 mile passes, shifting at 6800 RPM, and hitting over 7000 across the finish line, with zero issues. And according to the guy that bought the engine from my a year and 1/2 ago, it is still running fine. That said, a buddy did have a Scat 3.25" cast SBF crank that ate the thrust surface after a couple of years of racing. I still wouldn`t trust Eagle stuff in a FE,  but for a SB Ford, I would consider them.

That's another reason I decided to use this crank.  I would probably be a little more open to using another one in the future.  This one was actually sold as a "blem" crank and was sold with condition that it needed to be ground .010"/.010".   I walked all over it and couldn't find anything wrong with it, other than sub-perfect surface finish on the journals.  I polished it, mic'd it, and went on.
Brent Lykins
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410bruce

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #30 on: April 21, 2022, 06:40:29 PM »
530

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #31 on: April 22, 2022, 02:01:21 PM »
They are lighter.  But they are also custom length, so that lets me use a much longer rod than what most guys use in this combination.  More importantly, that let's me use a lot lighter piston than what most guys use.  A typical Ford 302 piston compression height is around 1.600".  Mine are .990".  Yes, under an inch.

Sounds like you have to keep those pistons under a welding blanket - otherwise they'll float away.  Very cool design. 

blykins

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #32 on: April 22, 2022, 04:18:36 PM »
Time is up....

This little guy made 535 hp @ 7400 rpm, with 454 lb-ft of torque.  Pulls were to 7800-8000 rpm. 

Who was the closest without going over?
Brent Lykins
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410bruce

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #33 on: April 22, 2022, 04:57:55 PM »
I think it was me, Brent!  :D

blykins

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #34 on: April 22, 2022, 05:01:11 PM »
Yep, I think you're right.

Shoot me an email and claim your new billet adjustable FE timing pointer.
Brent Lykins
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410bruce

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #35 on: April 22, 2022, 05:09:37 PM »
Email sent.  8)

Heo

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #36 on: April 23, 2022, 11:02:00 AM »
Impressiv to say the least



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cleandan

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #37 on: April 23, 2022, 03:00:25 PM »
Thanks Brent, the game was fun and the build is impressive.
1.72 HP per ci. is certainly worth noting.

I got a little optimistic with my 1.77 HP per ci.
Too much faith in your abilities I guess....I'll take you down the podium a notch or two to compensate. :)

Have a great day.

blykins

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #38 on: April 23, 2022, 05:04:50 PM »
Thanks Brent, the game was fun and the build is impressive.
1.72 HP per ci. is certainly worth noting.

I got a little optimistic with my 1.77 HP per ci.
Too much faith in your abilities I guess....I'll take you down the podium a notch or two to compensate. :)

Have a great day.

Give me a few weeks.....that's only 15 hp away.  I'll get there.
Brent Lykins
Lykins Motorsports
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JC-427Stroker

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #39 on: April 27, 2022, 02:04:31 PM »
Time is up....

This little guy made 535 hp @ 7400 rpm, with 454 lb-ft of torque.  Pulls were to 7800-8000 rpm. 

Who was the closest without going over?

Nice numbers.

What did it have for compression and what fuel did you run?

With your tighter bearing clearances, were you running a 5-30 oil, or 10-40?

I've had a set of new BME 6.795"  (426 series) rods setting around for years. Some day I'm going to have to build an engine around them. A 460 BBF.... maybe something like a 508 (4.42x4.14). I have the off-set ground 4.14 crank and a 3.85 steel truck crank for a 472".     I got them off BME's  "Over Stock" page about 10  years ago for about 1/2 price.

Alumi rods still make people nervous. Bill (BME) told me " Don't listen to them"
« Last Edit: April 27, 2022, 07:01:23 PM by JC-427Stroker »

JC-427Stroker

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #40 on: April 27, 2022, 02:53:57 PM »
Thanks Brent, the game was fun and the build is impressive.
1.72 HP per ci. is certainly worth noting.

I got a little optimistic with my 1.77 HP per ci.
Too much faith in your abilities I guess....I'll take you down the podium a notch or two to compensate. :)

Have a great day.

535/331 = 1.62 HP per CI.  and 1.37 lbs ft per CI.     Both impressive.

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #41 on: April 27, 2022, 06:56:18 PM »
This engine is for me.  If I don’t try different things, I won’t be able to pass on information and engine combinations to customers.

Since I specialize in custom camshafts for Fords, I spec’d 3 cams to try.  I chose that one at the end, just to show that high lift doesn’t always need to be used to make big power. 

The engine is not low rpm.  You just guessed wrong.  :)

Also, we tried an 830 Holley and lost power.  Sometimes “small carbs”  are best.

Did you by chance check the vacuum with both carbs ?

I was hoping to be able to do a cam swap on the dyno with my 565 next month, but that's not going to happen now. I'm going to have to settle for a tunnel ram swap.  Shorter with more taper vs Longer with less taper with the new cam.

As far as the "high lift" I've been having that discussion with some guys. Of the two cams I had  ground I'd expect similar results on the top end, but with different approaches to get there. The cam I'm going with should have stronger mid-range numbers.  I'm very much interested in testing  the Theory vs Reality.   Valve lift Area Under the Curve. How much can duration make up for less lift, and what's it do to the power band?   All fun stuff to work with.
« Last Edit: April 27, 2022, 07:03:34 PM by JC-427Stroker »

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #42 on: April 27, 2022, 09:03:43 PM »
Thanks Brent, the game was fun and the build is impressive.
1.72 HP per ci. is certainly worth noting.

I got a little optimistic with my 1.77 HP per ci.
Too much faith in your abilities I guess....I'll take you down the podium a notch or two to compensate. :)

Have a great day.

535/331 = 1.62 HP per CI.  and 1.37 lbs ft per CI.     Both impressive.

Read the title again.  311 SBF, not 331.  535/311=1.720257 hp/ci, and 454/311=1.45981 lb/ft/ci

Joe-JDC
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Re: Guess the horsepower game, Ford 311 SBF
« Reply #43 on: April 28, 2022, 12:38:14 AM »


Read the title again.  311 SBF, not 331.  535/311=1.720257 hp/ci, and 454/311=1.45981 lb/ft/ci

Joe-JDC

Thank you .

Read twice type once ...  Not sure how that got passed me.  Thanks.

The 1.45 lbs ft per cube is very impressive.

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #44 on: April 28, 2022, 04:37:53 AM »
Time is up....

This little guy made 535 hp @ 7400 rpm, with 454 lb-ft of torque.  Pulls were to 7800-8000 rpm. 

Who was the closest without going over?

Nice numbers.

What did it have for compression and what fuel did you run?

With your tighter bearing clearances, were you running a 5-30 oil, or 10-40?

I've had a set of new BME 6.795"  (426 series) rods setting around for years. Some day I'm going to have to build an engine around them. A 460 BBF.... maybe something like a 508 (4.42x4.14). I have the off-set ground 4.14 crank and a 3.85 steel truck crank for a 472".     I got them off BME's  "Over Stock" page about 10  years ago for about 1/2 price.

Alumi rods still make people nervous. Bill (BME) told me " Don't listen to them"

It had 10.59:1 compression and we ran 112 Sunoco.  I think we would have benefitted from a pump gas mix and I will try that when we go back.  The exhaust ports were a little on the sooty side.  It has a lot of cylinder pressure due to the cam being so advanced, so I really didn't know what I could get away with.  We played it safe the first time and I can back into something else on the next session.

I ran 5W-20 oil.  Some of the rod bearing clearances were .0018-.0019".  It completely makes sense to me to set them up a little tight, since aluminum expands so much.  We just gave the engine ample time to warm up. 

I pulled the pan off the other day to change the rear main seal and the timing cover seal to a double lip/teflon setup for a vacuum pump addition.  I checked the bearings while I was in there.  You can still see my mic tracks.







Aluminum rods do make people nervous.  This engine is gonna go in a street car after I thrash it on the dyno for awhile.  It will keep the aluminum rods. 

I attribute the horsepower to a really nice set of heads, a well-chosen camshaft, and some careful measuring and planning.  Tight quench with a little engine that pulls hard on the ports. 

Brent Lykins
Lykins Motorsports
Custom FE Street, Drag Race, Road Race, and Pulling Truck Engines
Custom Roller & Flat Tappet Camshafts
www.lykinsmotorsports.com
brent@lykinsmotorsports.com
www.customfordcams.com
502-759-1431
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Stangman

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #45 on: April 28, 2022, 08:43:53 AM »
i like the coated bearings. Is it a harder surface like a shell or can you csratch it with your nail.
« Last Edit: April 28, 2022, 08:45:28 AM by Stangman »

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #46 on: April 28, 2022, 10:56:50 AM »


It had 10.59:1 compression and we ran 112 Sunoco.  I think we would have benefitted from a pump gas mix and I will try that when we go back.  The exhaust ports were a little on the sooty side.  It has a lot of cylinder pressure due to the cam being so advanced, so I really didn't know what I could get away with.  We played it safe the first time and I can back into something else on the next session.

I ran 5W-20 oil.  Some of the rod bearing clearances were .0018-.0019".  It completely makes sense to me to set them up a little tight, since aluminum expands so much.  We just gave the engine ample time to warm up. 

I pulled the pan off the other day to change the rear main seal and the timing cover seal to a double lip/teflon setup for a vacuum pump addition.  I checked the bearings while I was in there.  You can still see my mic tracks.



Aluminum rods do make people nervous.  This engine is gonna go in a street car after I thrash it on the dyno for awhile.  It will keep the aluminum rods. 

I attribute the horsepower to a really nice set of heads, a well-chosen camshaft, and some careful measuring and planning.  Tight quench with a little engine that pulls hard on the ports.

Thanks for the info.  Were you able to spin it over for a cyl psi test ?

That's a great little test bed ... Have fun with it.

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #47 on: April 28, 2022, 11:31:05 AM »


It had 10.59:1 compression and we ran 112 Sunoco.  I think we would have benefitted from a pump gas mix and I will try that when we go back.  The exhaust ports were a little on the sooty side.  It has a lot of cylinder pressure due to the cam being so advanced, so I really didn't know what I could get away with.  We played it safe the first time and I can back into something else on the next session.

I ran 5W-20 oil.  Some of the rod bearing clearances were .0018-.0019".  It completely makes sense to me to set them up a little tight, since aluminum expands so much.  We just gave the engine ample time to warm up. 

I pulled the pan off the other day to change the rear main seal and the timing cover seal to a double lip/teflon setup for a vacuum pump addition.  I checked the bearings while I was in there.  You can still see my mic tracks.



Aluminum rods do make people nervous.  This engine is gonna go in a street car after I thrash it on the dyno for awhile.  It will keep the aluminum rods. 

I attribute the horsepower to a really nice set of heads, a well-chosen camshaft, and some careful measuring and planning.  Tight quench with a little engine that pulls hard on the ports.

Thanks for the info.  Were you able to spin it over for a cyl psi test ?

That's a great little test bed ... Have fun with it.

Got caught up in making horsepower last time, but can do that the next time around.   DCR with Pat Kelley's calculator shows 8.9................
Brent Lykins
Lykins Motorsports
Custom FE Street, Drag Race, Road Race, and Pulling Truck Engines
Custom Roller & Flat Tappet Camshafts
www.lykinsmotorsports.com
brent@lykinsmotorsports.com
www.customfordcams.com
502-759-1431
Instagram:  brentlykinsmotorsports
YouTube:  Lykins Motorsports

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #48 on: April 28, 2022, 11:43:11 AM »
Your power numbers are all the more impressive at 10.6:1 compression. 

Great combination.

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #49 on: April 28, 2022, 02:39:01 PM »
Ok, so I'm gonna have to make a choice:  try vacuum pump first or try this beauty that I just got from Mr. Craine.  And yes, it's Australian, not Chinese LOL

Brent Lykins
Lykins Motorsports
Custom FE Street, Drag Race, Road Race, and Pulling Truck Engines
Custom Roller & Flat Tappet Camshafts
www.lykinsmotorsports.com
brent@lykinsmotorsports.com
www.customfordcams.com
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Re: Guess the horsepower game, Ford 311 SBF
« Reply #50 on: April 28, 2022, 04:19:18 PM »
Was it set up with light tension oil rings ?

I like that manifold... Sexy.

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #51 on: April 28, 2022, 05:50:49 PM »
I'm interested in what that Parker Funnel Web manifold will do, too. But, if a larger carb, reduced power, on a ported Vic Jr, that would indicate that the intake flow, was maxed out at 750 cfm or, that there was something wrong with either the Edel manifold design or the larger carb you tried, if it picks up power with the PFW.

There are two more manifolds worth trying, the Super Victor and the Holley 300-275 Tunnel Ram.
Frank

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #52 on: April 28, 2022, 06:15:22 PM »
I'm interested in what that Parker Funnel Web manifold will do, too. But, if a larger carb, reduced power, on a ported Vic Jr, that would indicate that the intake flow, was maxed out at 750 cfm or, that there was something wrong with either the Edel manifold design or the larger carb you tried, if it picks up power with the PFW.

There are two more manifolds worth trying, the Super Victor and the Holley 300-275 Tunnel Ram.

The larger carb was an older Holley 830.  They just can't hang with the newer carbs with their fancy billet metering blocks, venturi designs, and fancy emulsions.  That's why I put "small carbs" in quotes on the other page.  Even though it was "just" a 750, they actually flow ~800 cfm, +/-, and make more horsepower than the older "bigger" carbs. 
Brent Lykins
Lykins Motorsports
Custom FE Street, Drag Race, Road Race, and Pulling Truck Engines
Custom Roller & Flat Tappet Camshafts
www.lykinsmotorsports.com
brent@lykinsmotorsports.com
www.customfordcams.com
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Re: Guess the horsepower game, Ford 311 SBF
« Reply #53 on: April 28, 2022, 06:46:06 PM »
So, a real 850 jeted right or 1000HP would be worth trying.

What carb are you going to run on the FW?
Frank

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #54 on: May 07, 2022, 03:11:29 PM »
Intake from Joe came yesterday.   Nice lookin' piece.  385cfm, which I assume is an average flow as Joe usually balances the runners. 

Even though the intake flows more, it could totally be a wash as the engine may not want that runner length.   You never really know for sure until you try and I haven't had much luck with software determining the optimal runner lengths.   Even if I lose a few ponies, I think I'll keep it as the intake just demands attention. 

Got it all swapped this morning.  Took all of 15 minutes and I remembered how much quicker it is to change an intake on a small block vs an FE....LOL

I went ahead and swapped it because I shot myself in the foot when I was at the dyno last time.  I was using a borrowed carburetor and I don't have access to that carburetor anymore.  Instead of going down, getting a baseline with a new carb, and then pulling the VJ to find out that the intake needs cut would have been a slight kick in the pants.  I'm pretty confident that the new carb has the same metering blocks, baseplate, etc., so it should be pretty close.....crossing my fingers.....

Any guesses as to what it will do?

BTW, the pictures show the engine with a 2" Super Sucker.  I'm almost 100% sure it won't want the 2" carb spacer, but I had to slap it together just to see how mean it looks.





Brent Lykins
Lykins Motorsports
Custom FE Street, Drag Race, Road Race, and Pulling Truck Engines
Custom Roller & Flat Tappet Camshafts
www.lykinsmotorsports.com
brent@lykinsmotorsports.com
www.customfordcams.com
502-759-1431
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Re: Guess the horsepower game, Ford 311 SBF
« Reply #55 on: May 07, 2022, 06:07:48 PM »
Yes, that is average flow at 385 cfm.  All ports were between 383-387 cfm.  You need a camshaft change to .650" lift or more to see an appreciable difference, IMO.  It would have been neat to see how this engine ran with your first camshaft at .710" lift.  I have cut the top of the guides down a small amount to get valve stem seal clearance and still have the seals grip the guide.  You might try that next time.  Joe-JDC
Joe-JDC '70GT-500

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Re: Guess the horsepower game, Ford 311 SBF
« Reply #56 on: May 07, 2022, 06:26:29 PM »
Yes, that is average flow at 385 cfm.  All ports were between 383-387 cfm.  You need a camshaft change to .650" lift or more to see an appreciable difference, IMO.  It would have been neat to see how this engine ran with your first camshaft at .710" lift.  I have cut the top of the guides down a small amount to get valve stem seal clearance and still have the seals grip the guide.  You might try that next time.  Joe-JDC

I would have done that, but the seals touch the locators.  I also wouldn't have had any piston/valve clearance.  I'm at .078" on the exhaust side right now. 

If I want to run another cam, it will require longer valves and different pistons. 

Even if I pick up 6-7 hp, I'll be pleased because I think I can pick up another little wad with a vacuum pump. 

Joe, you've been my dyno mule intake supplier LOL....JJ got the adapter and tunnel ram and this little guy got the FW.
Brent Lykins
Lykins Motorsports
Custom FE Street, Drag Race, Road Race, and Pulling Truck Engines
Custom Roller & Flat Tappet Camshafts
www.lykinsmotorsports.com
brent@lykinsmotorsports.com
www.customfordcams.com
502-759-1431
Instagram:  brentlykinsmotorsports
YouTube:  Lykins Motorsports