641" C-head, 1170 hp

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641" C-head, 1170 hp Empty 641" C-head, 1170 hp

Post  David Willingham on March 15th 2011, 8:04 pm

1170 hp @ 6400 & 992 tq @ 5600 on plain clear methanol and Electronic fuel injection.

641" C-head, 1170 hp 641-12

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Gas was tried, but we only made three pulls and did not get the A/F ratio right or the timing. We had to
get off the dyno, so that deal isn't worth discussing.
I will say that gas and alky both acted the same. They started the same and they were both extremely responsive.

I will be swapping to a better intake in the future make better power up top.

Specs:

A460 block filled solid (old truck pulling engine), Old design block, 10 head bolts only
4.634" bore
LA Enterprises Kryptonite billet crank, 4.75", center counterweights, knife-edged & cross-drilled.
Ross flat top pistons, gas ported, 550 grams
Rings are Total Seal (not gapless), .043 x .043 x .1875
Groden billet aluminum rods, 6.835" long, 550 grams
16:1 CR
Billet Fab drysump pan, 4 suction line in pan, full kickout, no windage screen, no starter provision
Cometic headgaskets, .060" thick
C heads ported by Bennett Racing first and then worked over by Charlie Evans.
Flow Average is 501.8 @.850 intake and 364.3 @ .900 exhaust
Valves are 2.427 int and 1.9 exhaust All Titanium
425 lb seat pressure intake and 400 on the exhaust
T & D shaft rockers, 1.75 int and 1.7 ex
Holmes intake on Charlie's adapter plates.
Enderle "birdcatcher" for throttle body.
MFI Pro EFI system by MFI Electronics
8 Ford(Bosch) 160 lb injectors
Enderle 80A-1 pump running off back of drysump
Weldon fuel regulator set to 80 psi (70 psi at idle)
Peterson 5-stage drysump, 1.1" pressure section, fuel pump drive adapter on the back, 50% speed
Ignition MFI Pro firing a MSD 7AL3 & HVC II(individual coils will be put on ASAP)
Headers 2.375 to 2.5" step (2.25" on dyno)

Please iscuse the missing nut on the cam sprocket. I have more on order. I still have to order all 12 pt ARP bolts/studs/nuts for everything and make the nut and spacers for the crank mandrel. The heads are almost ready and the engine should be complete by next weekend. The hoses and fittings are the most expensive part left to do.



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641" C-head, 1170 hp 3-19-2011pictures020

641" C-head, 1170 hp 3-19-2011pictures019


Last edited by David Willingham on July 24th 2011, 11:46 am; edited 11 times in total
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Post  '65 T-BOLT on March 15th 2011, 8:12 pm

sounds like a killer set up
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Post  IDT-572 on March 15th 2011, 11:48 pm

Bad Cool Twisted Evil
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Post  jsracing on March 16th 2011, 1:21 am

Cant wait to see the dyno numbers! this is going to be a bad ass mill.

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Post  David Willingham on March 31st 2011, 11:50 am

Just got the heads back from Chuck Ford. I bought the heads from Bennett Racing and had Charlie CNC port the exhaust, replace some valve guides, flowed them, and do a valve job. He left them unassembled so I could put them together whenever. While at the chassis shop, everything rusted, including the seats. The springs were marginal, so Chuck Ford cleaned them up, lapped the seats, and put some new springs, retainers & locks on. Spring pressure is at 425 lbs on the intake and 400 on the exhaust per his recommendations Shocked . I'll put the rockers on tonight and re-paint the block. Getting close finally after all these years! Very Happy


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641" C-head, 1170 hp 100_1018
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Post  D. Sea on March 31st 2011, 11:55 am

Nice! Cool
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Post  342g on March 31st 2011, 11:58 am

Real nice, I likey. cheers
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Post  David Willingham on March 31st 2011, 12:02 pm

Thanks guys! I hope to see ya'll at the bash. I'll have this POS there if nothing bad happens, lol. I'll have green oil and some M-5.... Twisted Evil
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Post  richter69 on March 31st 2011, 12:06 pm

David Willingham wrote:Thanks guys! I hope to see ya'll at the bash. I'll have this POS there if nothing bad happens, lol. I'll have green oil and some M-5.... Twisted Evil


^^^^^^ hell to the yes.................. Laughing
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Post  D. Sea on March 31st 2011, 12:15 pm

David Willingham wrote:Thanks guys! I hope to see ya'll at the bash. I'll have this POS there if nothing bad happens, lol. I'll have green oil and some M-5.... Twisted Evil

David,

Don't you need a HERO driver when using green oil and M5?

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Post  David Willingham on March 31st 2011, 12:19 pm

No, you just have to borrow his cape! lol!
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Post  D. Sea on March 31st 2011, 12:26 pm

David Willingham wrote:No, you just have to borrow his cape! lol!


LMFAO!

641" C-head, 1170 hp Christies-june-2008-superman-iii-cape-photo-high-res
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Post  KY JELLY on March 31st 2011, 12:29 pm

I like that faayule pump piggy back drive Laughing
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Post  bruno on March 31st 2011, 3:11 pm

holy smokes batman .....that there is an engine !!!!! looks great David , i great to finally see her coming together , i guess i need to step up to the big boy tune Laughing Wink


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Post  56Tbird on March 31st 2011, 3:28 pm

Damon ,that looks like a dress instead of a cape?? Fabio ,you hiding sumtin on us??? scratch king
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Post  56Tbird on March 31st 2011, 3:30 pm

David ,that's a totally awesome engine!! looks like Keown is gonna get spanked by another truck affraid lol!
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Post  David Willingham on March 31st 2011, 7:00 pm

I don't think it will be this year. I am going to register to TNT just in case it will move under it's own power, but I don't know if I have the funds right now to buy all the things needed to make the truck race-ready, not to mention all the safety stuff.
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Post  David Willingham on April 1st 2011, 1:10 pm

Last night I got the valvetrain on and put the sparkplugs in. At 16:1, this thing is a bear to turn over by hand! I believe this engine is going to have a nice "chirp" to it judging by the "hiss" of air blasting out when the ex valve cracks open. I can't wait! Twisted Evil
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Post  jsracing on April 1st 2011, 8:17 pm

You know if you get done before me I'm gonna be pissed right? Laughing then you have to come ALL the way up here and race in a Indy Friday nite rage.. I'll pay your entry lol You buy the beer n whiskey.

I cant wait either I been following your truck for a while now. and neither of us ran those TFS heads.


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Post  David Willingham on April 2nd 2011, 10:25 am

Has anybody ran those TFS heads yet?? I won't be done with my truck until next year probably, but it may make the bash for show & tell and hit a few TNTs later in the year. The engine isn't done, I'm just trying to get it to the bash. There's a lot of r&d to be done with the vacuum pump, down nozzles, and a few other things. A blower may be in the future if I like racing the truck and depending on what classes open up.
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Post  jsracing on April 3rd 2011, 1:42 pm

I think the guy I sold them to had a motor cycle accident and didnt survive.

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Post  racnrick on April 3rd 2011, 3:16 pm

KY JELLY wrote:I like that faayule pump piggy back drive Laughing

I noticed that too. I wish I had seen that before now, I just got done making room and mounting all my pumps on my engine. That would have saved me some time and cussing Laughing . I looked on Peterson web site and did not see it there, must be made by someone else, or did Dave make it himself?

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Post  David Willingham on April 3rd 2011, 3:19 pm

Peterson makes it. Just call Phillip Oakley and have him check into it. I think it's a different rear cover. It could probably be bought and added onto your pump if it's a Peterson.

*EDIT* It requires the shaft to have the 3/8" internal hex, so I don't know if it could be added.


Last edited by David Willingham on April 3rd 2011, 9:11 pm; edited 1 time in total
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Post  racnrick on April 3rd 2011, 8:33 pm

Thanks, David.

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Post  brianhaeckel on April 7th 2011, 11:30 pm

Nice build. Keep a close eye on the Groden rods if they have a lightened beam. I had one break on me in the beam around six years ago. The rods were a little longer than yours(6.900) in a 1100hp/825tq naturally aspirated application that turned 8500rpm. I had a very light piston and the rods had less than 60 1/4mile passes on them.

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