LS2 w/ 550 rwhp realistic?
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Staging Lane
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From: OKC
LS2 w/ 550 rwhp realistic? In the near future will 550 rwhp be obtainable using a non-bored/stroked L92 head LS2/6.0? Obviously it will take ported and milled heads, but will this be a realistic goal to shoot for? The 346 guys have hit 500+ rwhp all motor w/o L92's. Or has someone already done this with a LS2/6.0.
Originally Posted by DoesSpeedTurnUon
To hit 550rwhp, I think you'll need to be stroked. I think I read somewhere of a 6.0 GTO with an MS3 and L92 heads made 515rwhp.
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Originally Posted by 11 Bravo
Where did you see that? I've seen no results with the L92's yet. People shouldn't get their hopes too high like they did with the ET heads that ended up being about as equal as the best factory cast ported heads. Those were supposed to take LS1's to the next level, but they didn't. Not saying the L92's won't live up to the hype, but it's a little too early to be predicting 550rwhp with a stock LS2 bottom end lol
I've seen 513RWHP 457RWTQ with a 6.0 GTO, dumped duals, hellion cam, 225 etp heads, Fast 90, PPLS2 throttle body, and formato tune. It didn't have an electric water pump. The L92's should also flow better than the ETP 225's. You'll still fall short unless your cam is absolutely massive, barely drivable kinda big...maybe ITB's if anyone ever gets them set-up properly...
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Seabirdak that was a Engine Dyno. They are talking Rear Wheel Dyno numbers.
Multiply that engine dyno number x .85 to get a rough estimate of rear wheel power (hmm now its only at roughly 460).
Between driveline loss, and engine acessories 15% is a good guess.
To get close to 550 rwhp (SAE adjusted) your going to need to shave the L92 head (to get the compression back up) go with a big stick (about as big as the hellion if not larger) and all of the supporting mods... and probably have to get a custom set of pistons to keep the valves from going into the stock LS2 flattops.
Multiply that engine dyno number x .85 to get a rough estimate of rear wheel power (hmm now its only at roughly 460).
Between driveline loss, and engine acessories 15% is a good guess.
To get close to 550 rwhp (SAE adjusted) your going to need to shave the L92 head (to get the compression back up) go with a big stick (about as big as the hellion if not larger) and all of the supporting mods... and probably have to get a custom set of pistons to keep the valves from going into the stock LS2 flattops.
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Originally Posted by 11 Bravo
Where did you see that? I've seen no results with the L92's yet. People shouldn't get their hopes too high like they did with the ET heads that ended up being about as equal as the best factory cast ported heads. Those were supposed to take LS1's to the next level, but they didn't. Not saying the L92's won't live up to the hype, but it's a little too early to be predicting 550rwhp with a stock LS2 bottom end lol
Originally Posted by seabirdak
Whats so hard about it? I saw a magazine article with heads, cam and intake swap nailed 546 whp. So yeah 550 and then some! lol 
We got 570/505 ON AN ENGINE DYNO.. not rear wheel.
Is 550rwhp possible? I guess, need a big *** cam though. Our was medium since I want it easily streetable.
I imagine 500rwhp is fairly easy though.. :shrug:
Well I'm a total 
so cut me some slack. lol 
11 bravo...i agree. it is way to early to say what the l92 heads will do. i hope they do well,i have a set being ported and they will go on a 402ci w/l76 intake w/12.0:1 compression. i hope they can out due a out of the box AFR225head w/fast 90 intake on a 402ci.
I agree with the rest with "its too early to tell." That, and the fact most setups out there with these heads are using cams that were designed around the LS1/6 style head flow.
