whats the best cubic inch for a c head combo

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Post  badcoupe on Mon 15 Oct - 19:57

well im looking to start my 2 year build with new engine combo -what cubic inch would you build ?

im looking at sending heads off to have them cnc ported and chambers done.new diamonds pistons and mgp aluminum rods

im looking at either 4.50 inch stroke with 4.6200 bore which is 605 -or destroking it and turning it a little harder at 8200-8500 which combo would be better for the c-head ?

whats the maximum bore on a a-460 block ?

any ideas would be greatly appreciated .....thanks

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Post  bruno on Mon 15 Oct - 20:07

what class ? grudge racing ? index ?
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Post  badcoupe on Mon 15 Oct - 20:12

i want 1100 hp so what ever it takes to get it with 1 carb -i guess index

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Post  cool40 on Mon 15 Oct - 20:14

the fms block can be had with 4.5 bore now so i'd think 4.5x4.5 would be hard to beat.
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Post  badcoupe on Mon 15 Oct - 20:16

im already 4.605 now bore

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Post  bruno on Mon 15 Oct - 20:19

what about a 4.75 and your existing bore .......
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Post  cool40 on Mon 15 Oct - 20:19

badcoupe wrote:im already 4.605 now bore
looks like you already have a start then. Cool
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Post  badcoupe on Mon 15 Oct - 20:21

dont wanna spend $3000 on a crank -i was thinking bigger bore shorter stroke

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Post  Outlaw5.0 on Mon 15 Oct - 20:52

4.500 or 4.750 stroke will get you 1100hp with the correct parts.

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Post  BOSS 429 on Mon 15 Oct - 22:01

not saying its the best, depends on the work on the c heads, but 4.750 x4.600 works well
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Post  Lem Evans on Mon 15 Oct - 22:47

You gonna spray it?

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Post  badcoupe on Tue 16 Oct - 6:16

yes sir i am im wanting to be able to make 1600 safely to run outlaw limited street /radial at norwalk and milan i know i wont be in top of field but should be able to run low 5,s

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Post  bruno on Tue 16 Oct - 6:44

badcoupe wrote:yes sir i am im wanting to be able to make 1600 safely to run outlaw limited street /radial at norwalk and milan i know i wont be in top of field but should be able to run low 5,s

just my opinion ..... i believe the rules state 2800 lbs for bbnos ??? i would run the 4.5 deal less shock on that tire ....... @ 1100 -1200 which a c-headed nos deal should make will get you there at that weight .....add the nitrous and she should run some 4.50-4.60
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Post  badcoupe on Tue 16 Oct - 6:50

Unfortunately Bruno I'm 3300# s until I win lottery I don't ever see 2800#,s

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Post  Doug Rahn on Wed 17 Oct - 11:37

Talk with Phillip, he did a 645 if I remember correctly. Made 1204hp with a single 1450 QFX n/a. http://www.429-460.com/t10158-1204?highlight=1204
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Post  badcoupe on Wed 17 Oct - 12:01

Wow nice build where is the info on specs

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Post  Doug Rahn on Wed 17 Oct - 13:29

I think this all that was posted about it http://www.429-460.com/t10169-1200-hp-with-single-carb-c-head
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Post  badcoupe on Wed 17 Oct - 16:48

Not much to.go on I think I'm gonna do the 614 deal turn it to 8200 ish with spray should make good power

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