high compression pistons in 22re
10-31-2009, 06:14 PM
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well i was wondering if any one has had any problems running high compression pistons in there 22re, because i thought about running high compression instead of a turbo or supercharger. there much cheaper to
10-31-2009, 06:31 PM
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It's a viable option for more power.
If you have the factory knock sensor though, you'll probably find it more of a problem than help since when the factory sensor detects knock, your timing drops all the way back to base settings, which could be 5 BTDC or whatever you set as baseline. An aftermarket EMS can retard timing until knock stops so it doesn't usually end up with a sudden drop in power.
However, the stock ECU can maintain a proper fuel mixture as long as the O2 operates properly, the AFM and TPS are set properly, and the injectors operate well.
If you have the factory knock sensor though, you'll probably find it more of a problem than help since when the factory sensor detects knock, your timing drops all the way back to base settings, which could be 5 BTDC or whatever you set as baseline. An aftermarket EMS can retard timing until knock stops so it doesn't usually end up with a sudden drop in power.
However, the stock ECU can maintain a proper fuel mixture as long as the O2 operates properly, the AFM and TPS are set properly, and the injectors operate well.
10-31-2009, 06:34 PM
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It's a viable option for more power.
If you have the factory knock sensor though, you'll probably find it more of a problem than help since when the factory sensor detects knock, your timing drops all the way back to base settings, which could be 5 BTDC or whatever you set as baseline. An aftermarket EMS can retard timing until knock stops so it doesn't usually end up with a sudden drop in power.
However, the stock ECU can maintain a proper fuel mixture as long as the O2 operates properly, the AFM and TPS are set properly, and the injectors operate well.
If you have the factory knock sensor though, you'll probably find it more of a problem than help since when the factory sensor detects knock, your timing drops all the way back to base settings, which could be 5 BTDC or whatever you set as baseline. An aftermarket EMS can retard timing until knock stops so it doesn't usually end up with a sudden drop in power.
However, the stock ECU can maintain a proper fuel mixture as long as the O2 operates properly, the AFM and TPS are set properly, and the injectors operate well.
10-31-2009, 06:35 PM
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stock pistons are hypereutectic.
maybe you're thinking 'forged', which tend to be eutectic and expand more when heated than stock and thus knock more when cold.
maybe you're thinking 'forged', which tend to be eutectic and expand more when heated than stock and thus knock more when cold.
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10-31-2009, 07:18 PM
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total brain lapse here, lol
10-31-2009, 07:24 PM
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Overall, it's up to you. If you consistantly run high octane fuel, then maybe you can get away with more compression and get more power without detuning ignition advance.
10-31-2009, 10:29 PM
#10
a few years ago one of the members on Celica GTS forum tried running high compression pistons was unable to run the car on pump gas .
So more or less after getting Mega $$$ in a engine rebuild just sort of gave up after trying all sorts of ideas to fix the problem.
For what it is worth the 22rec is just not a high horsepower engine for the amount of money spent per horsepower gain .
Swap something else in if horse power is what you are looking for.
My 2 cents
So more or less after getting Mega $$$ in a engine rebuild just sort of gave up after trying all sorts of ideas to fix the problem.
For what it is worth the 22rec is just not a high horsepower engine for the amount of money spent per horsepower gain .
Swap something else in if horse power is what you are looking for.
My 2 cents
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