Stock crank/rods safe for a 200 shot?
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Stock crank/rods safe for a 200 shot?
I hear the crank is good for just about anything I can throw at it..but what about the rods? This LS motor is going into my 93 RX7 and I was wondering if the stock rods(with rod bolts of course) would be safe for a constant 150 shot for the street(to get from 0 to the speed limit of course) with the occasional 200hit at the track/dyno queening. Would I be better off just getting better rods since ill be replacing the pistons anyways or will they work.
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Stock rods are good for quite a bit. 550-600 rwhp is about their limit. Now the rod bolts themselves are another matter. Granted aftermarket rods are generally alittle longer which gives the combustion process alittle more of a mechanical advantage on the crank to turn everything over, but it's all in how crazy you want to get with it.
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If you're talking about forged pistons only it'll hold. The Outlaw TA was hitting a 300 shot out of the hole and running 9s with just forged pistons before the stock rods started getting wavy. Ideally though if you're planning on changing the internals it's a good idea to go ahead and change the rods too. Check the nitrous section, this has been discussed a bajillion times.
https://ls1tech.com/forums/nitrous-oxide/551332-everything-nitrous-related-stock-bottom-end-wiring-everything.html
https://ls1tech.com/forums/nitrous-oxide/551332-everything-nitrous-related-stock-bottom-end-wiring-everything.html
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Ok, well like I said..it will see a 200 shot occasionaly mostly a 150 shot...the car is gonna be around 26-2800lbs total when finished and I think a 200 hit might be too much for the street...plus with heads/cam I dont really think ill need it to beat most of the cars around here.
#9
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Not a fan of the stock rod bolt for your application.
I think rods would hold. Forged pistons & aftermarket rods would be best. The stock pistons would probably hold for a while too but 200 is a pretty serious shot to hit a hyperuretic (sp) piston with over and over. The crank is a very good crank and probably ok.
It would be cheaper to use the higher quality parts all in all, than to have to redo if something goes wrong. I think upgrading is the better choice.
Good Luck with your project.
I think rods would hold. Forged pistons & aftermarket rods would be best. The stock pistons would probably hold for a while too but 200 is a pretty serious shot to hit a hyperuretic (sp) piston with over and over. The crank is a very good crank and probably ok.
It would be cheaper to use the higher quality parts all in all, than to have to redo if something goes wrong. I think upgrading is the better choice.
Good Luck with your project.