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possible 500rwhp stock cube?

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Old Feb 15, 2008 | 08:09 AM
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Default possible 500rwhp stock cube?

going with a forged bottom end and right now am running a lunati cam in my ls1 however i plan on going with a damn good set of 243 heads and i am trying to figure out how to make 500-550 rwhp all motor on pretty much stock cubes...anybody else out there done this or can shed some light on what i will need to do?
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Old Feb 15, 2008 | 08:11 AM
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Depends on if its a m6 or a4 and if you want it streetable ......or how streetable.
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Old Feb 15, 2008 | 08:36 AM
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get a 6.0L block.... stock cubes right?

no seriously. its possible. Patrick G did it with his setup, and there is a guy in miami that's making about 505rwhp.

i'd say that prtty much is the max effort on stock cubes. they are running top heads, custom cams, worked intakes, well planned exhausts...

more may be possible with a carb setup..but i doubt it would be very streetable.

go chat with those guys
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Old Feb 15, 2008 | 08:52 AM
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Definitely possible. Click here to find the recipe on how to do it:
https://ls1tech.com/forums/generation-iii-internal-engine/732392-recipe-500-rwhp-heads-cam.html
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.

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Old Feb 15, 2008 | 09:23 AM
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Originally Posted by Patrick G
Definitely possible. Click here to find the recipe on how to do it:
https://ls1tech.com/forums/showthread.php?t=732392
Awesome writeup.
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Old Feb 15, 2008 | 02:53 PM
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Originally Posted by Patrick G
Definitely possible. Click here to find the recipe on how to do it:
https://ls1tech.com/forums/showthread.php?t=732392

Thank you Patrick for your informative and intelligent answers to questions that are asked on this forum. You take a lot of your time in doing this and I appreciate it. Chuck
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Old Feb 15, 2008 | 07:33 PM
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I was going to post the same exact link. Hes the guy to talk to.
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Old Feb 16, 2008 | 03:50 AM
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with enough compression yes
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Old Feb 16, 2008 | 09:22 AM
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Have any broke the 500 mark with stock casting heads? I think the 243's will be the limiting factor here.
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Old Feb 16, 2008 | 09:44 AM
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yeah i dont think it could be done with 243's either.Although they are a great head ,you cant beat the chamber and runner designs of the top aftermarket heads.
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Old Feb 16, 2008 | 10:02 AM
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I Would think it is possible, i have 415 RWHP with Cam, Fast 90/90, pulley, LT headers and various other boltons. I would think with a good set of heads i would be close.
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Old Feb 16, 2008 | 10:03 AM
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There are quite a few people making that HP with stock cubes. In fact, more and more every week it seems! We made 468rwhp on a Mustang dyno, with 27" Hoosier QTP's, TH350 w/5,500 stall converter, 11* heads and a tune that wasn't even close to 100%. Granted it is race mill with a BIG solid roller, 15:1 comp., carb style intake, etc. That was two years ago now. Then agian, dyno numbers mean little to me, just a tuning tool. It's the numbers lit up on the board when I go through the traps I care about!
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Old Feb 16, 2008 | 10:27 AM
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Cartek, LG and MTI have made over 500 rwhp with ported factory castings. The porting has to outstanding and the rest of the combo has to be spot-on, but 500 rwhp with heads and cam is not limited to just aftermarket cylinder heads. In the right hands, the factory heads can be ported to flow like wind tunnels too.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.

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Old Feb 16, 2008 | 12:37 PM
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I had my block bored .010" over, but it was only 348ci...basicly stock cubes...corrected numbers in my sig. My heads were just stock 853 cast heads that Lingenfelter Performance CNC ported, and a friend of mine went back and cleaned up a little around the valve seats. Maybe with a set of AFR, Trickflow, or ETP heads, or if I had sent the Fast 90 intake off to be ported, I could have cracked 500rwhp.

Last edited by moeZ28; Feb 16, 2008 at 01:03 PM.
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Old Feb 16, 2008 | 01:17 PM
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My 346 Ci NA LS6 stock bottom engine topped 511 RWHP /455 RWTQ and is a daily driver...

The key to solve the equation is about building a nice combo designed by knowledgeable persons and an accurate tuning to complement the final results.

Christian
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Old Feb 17, 2008 | 12:52 PM
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^

Originally Posted by Black FormulaLs1
i am trying to figure out how to make 500-550 rwhp all motor on pretty much stock cubes, anybody else out there done this or can shed some light on what i will need to do?
Christian's build is very sweet, take a peek, Click Here....
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