Guess the hp of this compo lsx427

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Jul 30, 2012 | 02:14 PM

PROMODLSX

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From: milo,ia

Guess the hp of this compo lsx427

I was wanting ideas of what kind of hp numbers a guy could see with this comp
GM LSX block
427 cu.
RHS LS7 heads
callies rods
callies crank
sheet metal intake
twin throttle bodys
15.1 comp
alcohol
very big solid roller cam
jesel rocker
jesel time belt

I know there are a lot of varibles but just wanting a ball park. thanks!

Jul 30, 2012 | 02:33 PM

LS6

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From: Cherry Hill, New Jersey State

With that high compression, I think you will make 710 ~ 760 rwhp.

My guess

Bythe way, have a look at Holly new EFi intake (http://www.holley.com/300-229.asp) that can take two accufab 4500 throttel body (each will flow 2128 CFM, http://www.accufabracing.com/index.p...cid=1&Itemid=5) or the accufab Four Barrel 8500 (each will flow over 3,600 CFM, http://www.accufabracing.com/index.p...cid=1&Itemid=5).

See the below link in the youtube for a LSX 455ci with twin trottel:

Thanks

Last edited by LS6; Jul 30, 2012 at 03:07 PM.

Jul 30, 2012 | 02:33 PM

87silverbullet

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From: Slidell,LA

Should be bad *** and in the neighborhood of the mid 800's at the crank, give or take 20hp.

I wouldn't use the RHS LS7's but thats just me. I would look at the All-Pro LSW 12-2's. You can talk to Bob there and he can set the head up to your exact specs. Pick the runner, pick the valves, pick the spring package, get it set up the way you want. Just tell him what you are doing and he will recommend what is needed.

Jul 30, 2012 | 03:14 PM

3rdCoastPowerSports

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From: Loony Bin

i say around 750 at the crank

Jul 30, 2012 | 03:43 PM

PROMODLSX

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From: milo,ia

I think I could live with those numbers for now. The car race weight should fall in that 2200 lb range with driver. So high 7's maybe ?

Jul 30, 2012 | 05:07 PM

litle88

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From: Burbank, Illinois

Those damn Aussies! Have all the fun! Lol

Op your build would be sick regardless.

Jul 30, 2012 | 09:45 PM

1BadBlkB1tch

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From: Davenport,fl

im thinking 780whp sounds like a great build and at 2200lbs is that race weight with driver or no? cuz if so thats a 7.90-8.10 car imo with a great driver