C6 maximum power, stock internals
Burning Brakes
Joined: Nov 2006
Posts: 963
Likes: 1
LSX
LSX
At the 2006 SEMA show, GM Performance Parts introduced the LSX engine, an all-new cast-iron racing block based on the LS7 engine. It was designed with help from drag racing legend Warren Johnson, and despite being based on GM's small-block design, it offers displacements ranging from 364 cubic inches to 511 cubic inches (4.25" Bore x 4.5" Stroke) and is capable of withstanding 2500 bhp. This block incorporates two extra rows of head-bolt holes per bank for increased clamping capacity. The six bolt steel main caps are the same ones used on the LS7 engine. The engine debuted at the auto show in a customized 1969 Camaro owned by Reggie Jackson. The LSX will be available starting the second quarter of 2007, set to be available in authorized dealerships and retailers on March 31, 2007.[2]
LSX
At the 2006 SEMA show, GM Performance Parts introduced the LSX engine, an all-new cast-iron racing block based on the LS7 engine. It was designed with help from drag racing legend Warren Johnson, and despite being based on GM's small-block design, it offers displacements ranging from 364 cubic inches to 511 cubic inches (4.25" Bore x 4.5" Stroke) and is capable of withstanding 2500 bhp. This block incorporates two extra rows of head-bolt holes per bank for increased clamping capacity. The six bolt steel main caps are the same ones used on the LS7 engine. The engine debuted at the auto show in a customized 1969 Camaro owned by Reggie Jackson. The LSX will be available starting the second quarter of 2007, set to be available in authorized dealerships and retailers on March 31, 2007.[2]
Race Director
Joined: Oct 2004
Posts: 10,089
Likes: 14
Burning Brakes
Joined: Dec 2004
Posts: 810
Likes: 1
From: Turbocharged in NC
I believe I've been told the stock LS2 will handle about 600rwhp before the rings and pistons are in jeopardy. I believe it also depends on how much you bounce it off the rev limiter since that is really hard on it. You can replace the rings and pistons with better forged parts, and it will go much higher depending on the parts you pick. I also believe its a similar story with the transmission and differential. Of course, you can launch it hard and abuse it, and that could break it at the 600rwhp mark, but I believe it can be built to withstand much more. Going fast costs money.
Last edited by wewing; May 10, 2007 at 06:46 AM.
Drifting
Joined: May 2005
Posts: 1,254
Likes: 0
From: Ft. Liquordale Florida
Running somewhere in the 625RWHP range with stock bottom end & 12lbs boost. 34K mi (on a 65K mi motor) with "average" oil consumption and no issues to speak of.
Will replace with a forged bottom when this one wears out (which, at the rate I rack the miles on - will only be a couple of years). I'm betting the guys @ Horsepower that I'll get 100K mi out of this bottom.
Rick
Will replace with a forged bottom when this one wears out (which, at the rate I rack the miles on - will only be a couple of years). I'm betting the guys @ Horsepower that I'll get 100K mi out of this bottom.
Rick
Drifting
Joined: Nov 2002
Posts: 1,651
Likes: 125
From: laguna niguel ca
My LS2 motor made 461rwhp/435rwtq N/A. Had 50,000 miles on the clock before I put a forged 427 in. It's now in my son's C5 and still going strong. With the cast pistons that come with these motors I think that's about it (450-460rwhp ) and expect it to live a long life. Blown LS2 motors are on a short fuse. Tuners will tell you, throwing boost at that #7 piston with a stock LS2 manifold puts it in a lean condition and that's the one that fails. They seem to live longer with a FAST 90 manifold. It seems to even out the air distribution under boost conditions. Even so, the distance from the first ring land to the top of the piston isn't much and that's what breaks off under boost. Anyway with the stock internals I'll stick with the 450-460 range. BTW my new L92 stroker motor makes well over 500rwhp and I can't use it. I hooked much better with my LS2 making what I stated above. After 450rwhp C6's become traction limited, and RWHP just becomes a number. My opinion.
Last edited by andreas g.; May 11, 2007 at 04:04 PM.
Drifting
Joined: May 2005
Posts: 1,254
Likes: 0
From: Ft. Liquordale Florida
At my numbers, trying to hook up in 1st & 2nd @ full power is an excercise in futility.
Good thing I set this up as a "roll on" car, not a drag racer. While I may not hook-up from a launch, I'm damn near untouchable on a roll.
Some folks set up for 10 seconds at a time, I setup for an obscenely fast highway car (and a daily driver taboot)...
As far as longevity goes - I'll report back when I fry the motor, then we can really judge for ourselves.
Rick
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Drifting
Joined: Nov 2002
Posts: 1,651
Likes: 125
From: laguna niguel ca
At my numbers, trying to hook up in 1st & 2nd @ full power is an excercise in futility.
Good thing I set this up as a "roll on" car, not a drag racer. While I may not hook-up from a launch, I'm damn near untouchable on a roll.
Some folks set up for 10 seconds at a time, I setup for an obscenely fast highway car (and a daily driver taboot)...
As far as longevity goes - I'll report back when I fry the motor, then we can really judge for ourselves.
Rick
Rick, that's exactly what my car has become. A roll on the highway 3&4 th gear is an E ticket ride. This is a top end road car, no question about it. It's also my daily driver, and gets 26.5mpg highway. Not bad for a 427 ci making 525 rwhp N/A. It's realy not a drag car, but I've never thought of corvettes as drag cars with independent suspension. Not that guys don't turn them into 10 sec rockets and faster. But there set up for it, and not really for the street or a 6 hr drive. Give me a road car any day.
Le Mans Master
Joined: Nov 2005
Posts: 6,344
Likes: 22
From: Alexandria VA
Throwin a cam in isnt going to do much if you run 19 psi at this motor.
or maybe I dont get your question
Drifting
Joined: Dec 2002
Posts: 1,613
Likes: 0
HP is not the killer if it never detonates it will live longer to a point.
Put the APS kit on and tune to 10.5 to 1 on 90 octane, then run 100 octane in her at all times I bet she will live a nice long fast life!
Put the APS kit on and tune to 10.5 to 1 on 90 octane, then run 100 octane in her at all times I bet she will live a nice long fast life!
Melting Slicks
Joined: Oct 2006
Posts: 2,905
Likes: 1
Not sure how much an LS2 can hold, but my LS1 held almost 550bhp before I decided(not had to) get a built LS6 in my 2000 TA.That was with it being a daily driver, over a hundred track runs and almost 80,000 miles.
CF Senior Member
Joined: Feb 2006
Posts: 23,313
Likes: 25
From: Tucson Arizona
If "reliability" is the key word, you might just want to leave your cast-piston engine stock. That being said, many people slap a SC or TT's on their stock engine and if they keep the greed to a minimum, they may do fine.
Here is an old thread entitled "Stock Short Block Handle Power????" discussing some of the pitfalls of maxing-out a stock engine.
http://forums.corvetteforum.com/show....php?t=1527668
Here is an old thread entitled "Stock Short Block Handle Power????" discussing some of the pitfalls of maxing-out a stock engine.
http://forums.corvetteforum.com/show....php?t=1527668
Drifting
Joined: May 2005
Posts: 1,254
Likes: 0
From: Ft. Liquordale Florida
If "reliability" is the key word, you might just want to leave your cast-piston engine stock. That being said, many people slap a SC or TT's on their stock engine and if they keep the greed to a minimum, they may do fine.
Here is an old thread entitled "Stock Short Block Handle Power????" discussing some of the pitfalls of maxing-out a stock engine.
http://forums.corvetteforum.com/show....php?t=1527668
Here is an old thread entitled "Stock Short Block Handle Power????" discussing some of the pitfalls of maxing-out a stock engine.
http://forums.corvetteforum.com/show....php?t=1527668
I will do a forged bottom when this one wears out/blows. But I also don't drag race it - it's a highway car - so the additional stress/abuse of hard launches may increase the lifespan of this motor beyond what redline shifts and hard launches would yield.
Rick
