Author Topic: The new 496 build dyno guesses?  (Read 6084 times)

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BattlestarGalactic

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The new 496 build dyno guesses?
« on: June 07, 2020, 07:58:34 PM »
So, after replacing the block of my 462 last summer, I built the 496 with my old Ed heads and a flat tappet cam in a new BBM block.  It made similar total power, but picked up torque from the 462.  With finding water leaking this past winter from my old Ed heads it was time for another upgrade.

After pulling the shortblock down we found #2-4 cam bearing issues from the flat tappet.   This led to another upgrade.

Soooo, it now has roller cam bearings, TF heads(stock), TD rockers to wiggle off my new ROLLER camshaft(.683 lift, 274/280 @ .050 on 104 centerline).  This using 12.5/1 Diamond pistons, my lightly worked vintage Dove TW intake and two 1850 Holleys.  I've always kept the reigns pulled tight at the shop about turning my motors into "max effort" builds as I always want them to be long lasting "dump truck" motors.  To go to this extreme is out of my typical comfort zone(and money), but this has really snowballed from what I originally wanted.  Oh well.  If I had jumped on the band wagon last summer I would already have a badazz build that would far surpass what I have now.  Hind sight is always 20/20.

It got on the dyno Friday afternoon with a quick break in.  I got there Saturday morning and made a few pulls to get a base line.  It was a touch fat so we knew some carb work was in store.  We opened the high speeds up and that got things more in line but still about 1/2 point fat.  We took a couple out of primary to just see if it would help.  It didn't.  Power curve went goofy up top.  We jetted it back up and it smoothed back out.   I was not going to pull secondary plates and plug/drill them and spend all afternoon trying to finesse it.  It is not killing the plugs and this gives me a touch of wiggle room for installation of an air box.  I still have the air tubes from 20 yrs ago, just need a box.  Buddy will make one for me at his shop.  I have a wide band in the car, so I will be able to monitor fuel.

Anyone want to put some figures up before I post what it did?  My one stipulation was keeping power at 6500, I don't want to have to run it 7200+.  It peaks at 6600.  Perfect.  It made what we had thoughts off.   The flat tappet version was in the 610-620 range with old Ed heads at 6500 rpm.
Larry

machoneman

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Re: The new 496 build dyno guesses?
« Reply #1 on: June 07, 2020, 10:20:16 PM »
649 hp.
Bob Maag

Rory428

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Re: The new 496 build dyno guesses?
« Reply #2 on: June 07, 2020, 11:31:56 PM »
Enough to make your vintage Nash 5 speed weep!
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

BattlestarGalactic

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Re: The new 496 build dyno guesses?
« Reply #3 on: June 08, 2020, 06:47:21 AM »
Enough to make your vintage Nash 5 speed weep!

LOL!!   See someone gets it!!!  I really don't want to have to buy a $10K Liberty to survive behind a big power motor in a 4000# car.  I've never been about the ET.  Just a nice, solid, reliable motor.
Oh, I do run a GF5R now, so I do have a slim chance of it surviving a while.
« Last Edit: June 08, 2020, 06:56:40 AM by BattlestarGalactic »
Larry

6667fan

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Re: The new 496 build dyno guesses?
« Reply #4 on: June 08, 2020, 11:42:12 AM »
667 peak hp.
If you have not spent enough green yet I bet you would like a pair of two circuit Quick Fuel carbs on that mill.

JB
JB


67 Fairlane 500
482 cid 636/619.
Tunnel Wedge, Survival EMC CNC heads, Lykins Custom Hydraulic Roller, Ram adjustable clutch, Jerico 4-spd, Strange third member with Detroit Locker, 35 spline axles, 4.86
10.68@125.71 1.56 60’

Stangman

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Re: The new 496 build dyno guesses?
« Reply #5 on: June 08, 2020, 02:29:55 PM »
Sometimes it just snowballs Larry. As long as your happy with the outcome thats great.
679 @ 6250
631 @ 4800
Should get the old girl running.
« Last Edit: June 08, 2020, 02:32:06 PM by Stangman »

fryedaddy

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Re: The new 496 build dyno guesses?
« Reply #6 on: June 08, 2020, 10:34:09 PM »
around 655
1966 comet caliente 428 4 speed owned since 1983                                                 1973 f250 ranger xlt 360 4 speed papaw bought new

chilly460

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Re: The new 496 build dyno guesses?
« Reply #7 on: June 09, 2020, 05:45:42 AM »
675hp

BattlestarGalactic

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Re: The new 496 build dyno guesses?
« Reply #8 on: June 09, 2020, 07:00:57 AM »
You all are pretty close............but..........


667 peak hp.
If you have not spent enough green yet I bet you would like a pair of two circuit Quick Fuel carbs on that mill.

JB

Near dead on it!   665 hp at 6600 rpm.  630 ft/lbs at 4000 rpm.   We were thinking 650-675, so this is right there.  Like I said, with a touch more tuning I think we could have found a few more, but I didn't want to spend all afternoon trying to strip the threads on the carb studs finding it.

I've picked up about 30 ft/lbs and 50 hp over the flat tappet motor.  The car picked up 3 tenths and 3 mph the last time, so I'm thinking another 3 or more?  10.69 down to 10.30's?  125 mph to 128?  I had no idea what the old motor was going to do, but after knowing that I am speculating what it might due this time.

Larry

Joe-JDC

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Re: The new 496 build dyno guesses?
« Reply #9 on: June 09, 2020, 09:43:45 AM »
You know you are going to want to see a 9 second timeslip with a wagon, right?  "Time is money", takes on a new meaning when it should be "Timeslip is money".  LOL  Congratulations.  I put a totally stock(+.030") numbers matching "old school" 428 CJ on the dyno yesterday, and came out with a very interesting set of numbers.  Nothing big or surprising, but cool none the less.   Joe-JDC
Joe-JDC '70GT-500

BattlestarGalactic

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Re: The new 496 build dyno guesses?
« Reply #10 on: June 09, 2020, 10:35:54 AM »
Oh, I'm being told I need 14/32 tires and a Liberty and remove 300# and let'r fly!!!  Ugh, really.  I've never been worried about being "fast".  As long as it's fun to drive, that's all I need.  I've won two championships and many, many, many races just being an 11.50 car.

I like the CJ motor in my pickup.  .040 over, lemans rods, stock heads, .59 flat tappet, med riser 2x4.  Fast?  It was respectable back in the early 90's on the street.  In today's standards it's a slug but I still enjoy driving it.
Larry

6667fan

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Re: The new 496 build dyno guesses?
« Reply #11 on: June 09, 2020, 01:18:40 PM »
 Victory(?) at last is mine!
 Beautiful numbers, love all those sixes. Looking forward to seeing it in person.

JB
JB


67 Fairlane 500
482 cid 636/619.
Tunnel Wedge, Survival EMC CNC heads, Lykins Custom Hydraulic Roller, Ram adjustable clutch, Jerico 4-spd, Strange third member with Detroit Locker, 35 spline axles, 4.86
10.68@125.71 1.56 60’

cjshaker

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Re: The new 496 build dyno guesses?
« Reply #12 on: June 09, 2020, 02:10:56 PM »
Sounds like you might be digging those wheelie bars back out. ;D  I know you've had a fair bit of trouble with the GF5R, so I hope it holds up behind the new engine. There just doesn't seem to be a good alternative between the power level of a Jerico or G-Force to the Liberty.
Doug Smith


'69 R-code Mach 1, 427 MR, 2x4, Jerico, 4.30 Locker
'70 F-350 390
'55 Ford Customline 2dr
'37 Ford Coupe

BattlestarGalactic

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Re: The new 496 build dyno guesses?
« Reply #13 on: June 09, 2020, 02:49:42 PM »
The GF5R hasn't been all that bad.  I've screwed it up a few times from stupidity on my part.  They hold plenty of HP, but if you screw up the linkage and jam it into 2 gears at once....well things happen.  Really, really bad things.

It's mostly a WEIGHT issue that is worse for the transmission.  If the car was a 1000# lighter it would not be so stressful?

I had dibs on a 800 hp, all alum FE a few years back.  Turn key, ready to install.  Oh, I wanted it.  I wanted it real bad.  It was an absolute steal of a lifetime.  I knew I would be in a world of hurt trying to keep a transmission in the car, let alone traction.
Larry

64PI

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Re: The new 496 build dyno guesses?
« Reply #14 on: June 10, 2020, 10:00:55 AM »
Larry, what rear suspension are you running? Any plans for a diet? I remember the first time I saw your car run was at the 2004 reunion at Columbus, OH. It always puts on a good show.

Fred