How Much for Forged Pistons & Rods in a LS3
03-12-2010, 04:05 PM
#21
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I figured it was a heat issue, since you track your car alot but I figured I would ask. There are a few guys with SC's that seem to do okay at the track but if you're going to road race alot, your best bet is a NA motor.
03-12-2010, 05:22 PM
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In your research, did you find a max power/rpm limit for the stock rods?
03-13-2010, 10:34 AM
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The real weak point seems to be the pistons themselves. You don't really here about too many guys throwing a rod as you do about cracked ringlands on the pistons.
Every now and then a timing chain goes or someone sucks a valve due to spring failure or valve failure of some sort.
I think as long as you can control detonation and get matched flow injectors you shold be good for 600 rwhp. It seems that #7 was the weak spot on the LS1 / LS6 motors. Have not heard of too many guys blowing up LS3 motors, except for oiling issues at the road tracks.
03-13-2010, 12:24 PM
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I don't really think the rods are the weak point as much as the pistons are. The older blocks made before 2000 have weaker rod bolts but the 2001 and up rod bolts are much stronger.
The real weak point seems to be the pistons themselves. You don't really here about too many guys throwing a rod as you do about cracked ringlands on the pistons.
Every now and then a timing chain goes or someone sucks a valve due to spring failure or valve failure of some sort.
I think as long as you can control detonation and get matched flow injectors you shold be good for 600 rwhp. It seems that #7 was the weak spot on the LS1 / LS6 motors. Have not heard of too many guys blowing up LS3 motors, except for oiling issues at the road tracks.
The real weak point seems to be the pistons themselves. You don't really here about too many guys throwing a rod as you do about cracked ringlands on the pistons.
Every now and then a timing chain goes or someone sucks a valve due to spring failure or valve failure of some sort.
I think as long as you can control detonation and get matched flow injectors you shold be good for 600 rwhp. It seems that #7 was the weak spot on the LS1 / LS6 motors. Have not heard of too many guys blowing up LS3 motors, except for oiling issues at the road tracks.
Is going bigger exhaust on the turbo an option when using the stroker?
03-13-2010, 01:26 PM
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Most of the time bigger is not better with turbos. Stock cubed turbos put up much more power per cube than the strokers due to the match of the turbo mapping efficencies.
That's one of the reasons I want to stay with stock cubes in case I ever go turbo.
If you're going with a centri 1 7/8" with a 3" exhaust should let you make pretty goood power, however I don't think you could ever come close to using it.
Why not go with a nice 427 built LS7 NA motor with a dry sump. I'm sure that will give you all the power you'll ever need for the track and it's a lot less $$$ to build and maintain.
FI and road racing short of formula one style cars just don't mix well.
