Author Topic: Guess the horsepower game, Ford 311 SBF  (Read 4867 times)

0 Members and 1 Guest are viewing this topic.

410bruce

  • Sr. Member
  • ****
  • Posts: 349
    • View Profile
Re: Guess the horsepower game, Ford 311 SBF
« Reply #30 on: April 21, 2022, 06:40:29 PM »
530

Falcon67

  • Hero Member
  • *****
  • Posts: 2151
    • View Profile
    • Kelly's Hot Rod Page
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

  • Hero Member
  • *****
  • Posts: 4801
    • View Profile
    • Lykins Motorsports
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
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

410bruce

  • Sr. Member
  • ****
  • Posts: 349
    • View Profile
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

  • Hero Member
  • *****
  • Posts: 4801
    • View Profile
    • Lykins Motorsports
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
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

410bruce

  • Sr. Member
  • ****
  • Posts: 349
    • View Profile
Re: Guess the horsepower game, Ford 311 SBF
« Reply #35 on: April 22, 2022, 05:09:37 PM »
Email sent.  8)

Heo

  • Hero Member
  • *****
  • Posts: 3281
    • View Profile
Re: Guess the horsepower game, Ford 311 SBF
« Reply #36 on: April 23, 2022, 11:02:00 AM »
Impressiv to say the least



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

cleandan

  • Sr. Member
  • ****
  • Posts: 359
    • View Profile
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

  • Hero Member
  • *****
  • Posts: 4801
    • View Profile
    • Lykins Motorsports
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
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

JC-427Stroker

  • Jr. Member
  • **
  • Posts: 96
    • View Profile
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

  • Jr. Member
  • **
  • Posts: 96
    • View Profile
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.

JC-427Stroker

  • Jr. Member
  • **
  • Posts: 96
    • View Profile
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 »

Joe-JDC

  • Hero Member
  • *****
  • Posts: 1489
  • Truth stands on its own merit.
    • View Profile
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
Joe-JDC '70GT-500

JC-427Stroker

  • Jr. Member
  • **
  • Posts: 96
    • View Profile
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.

blykins

  • Hero Member
  • *****
  • Posts: 4801
    • View Profile
    • Lykins Motorsports
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
Instagram:  brentlykinsmotorsports
YouTube:  Lykins Motorsports