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9:1 compression?

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Old 09-12-2009, 08:16 PM   #1 (permalink)
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9:1 compression?
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Old 09-13-2009, 03:51 AM   #2 (permalink)
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9:1 compression?
I't says its a FI piston.
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Old 09-13-2009, 04:33 PM   #3 (permalink)
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I't says its a FI piston.
Yeah, but if you can get 500WHP out of a turbo kit (they're coming out, some are already) - with the stock pistons...I doubt you'd get much more by swapping to a lower compression and increasing the boost pressure. I mean, swapping pistons won't get you to the 1000WHP range. $1100 or whatever for the pistons themselves, Probably around $1-1.5K to have them installed, plus a good chunk of money for a turbo designed around them and their lower compression...vs getting a turbo designed for the stock motor.

hmm.

Then there's the block limitations...
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Old 09-14-2009, 12:46 PM   #4 (permalink)
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Originally Posted by kannibul View Post
Yeah, but if you can get 500WHP out of a turbo kit (they're coming out, some are already) - with the stock pistons...I doubt you'd get much more by swapping to a lower compression and increasing the boost pressure. I mean, swapping pistons won't get you to the 1000WHP range. $1100 or whatever for the pistons themselves, Probably around $1-1.5K to have them installed, plus a good chunk of money for a turbo designed around them and their lower compression...vs getting a turbo designed for the stock motor.

hmm.

Then there's the block limitations...
anyone can claim the turbo is designed around a stock engine, but the fact of the matter is that no matter how strong a stock block may be, it's still a risk turbocharging (or supercharging) a car that was never designed for boost in the first place. Doing a built motor (aftermarket forged pistons and rods) goes a long way towards mitigating that risk.
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Old 09-14-2009, 04:52 PM   #5 (permalink)
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Originally Posted by Z1Performance View Post
anyone can claim the turbo is designed around a stock engine, but the fact of the matter is that no matter how strong a stock block may be, it's still a risk turbocharging (or supercharging) a car that was never designed for boost in the first place. Doing a built motor (aftermarket forged pistons and rods) goes a long way towards mitigating that risk.
Absolutely, positively correct. It's usually the pistons that go first.

If you keep the boost reasonable low (under 5 psi) you can probably get away with it on most any motor. However, everyone I know once they taste the power; the first thing they want to do is up the boost. Then what?? Ring lands usually and new pistons immediately after usually followed by a few rods.
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Old 09-15-2009, 02:51 AM   #6 (permalink)
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Yeah they have kits for the stock motor but you would NEVER want to even aproach the 10 psi barrier with 11-1 compression unless you are running meth
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