Pistons
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Registered User
Joined: Jul 2012
Posts: 221
From: Oregon
Pistons
What is the benefit of hi comp pistons verses the stock ones? I want to be able to drive my car around town or on the freeway for long periods of time without having to worry about the car overheating. I know hi comp pistons raises the compression ratio but why bother if you can't enjoy it, just like when it left the factory.
Chevy budget Olds powered
Joined: Jul 2011
Posts: 8,638
From: Elgin, Illinois
No real issues. Can be around 9.5 to 1 compression or 10 to 1 with stock heads depending on specs and milling etc etc. Can be. More and less at the same time. I could go on and on and beat this dead horse. My 355 olds is 10 to 1 compression runs 12.60's and I drive it every where. Does not overheat and I drive it long periods of times at 3500 plus rpms. Just my experience. There are so many variables that you really need a game plan. What are your goals. You can use flat tops and be at 9 to 1 with newer heads like #8's and be safe for lower octane fuels. Just some food for thought. More compression means more power which means more cam more gear etc etc.
Thread Starter
Registered User
Joined: Jul 2012
Posts: 221
From: Oregon
No real issues. Can be around 9.5 to 1 compression or 10 to 1 with stock heads depending on specs and milling etc etc. Can be. More and less at the same time. I could go on and on and beat this dead horse. My 355 olds is 10 to 1 compression runs 12.60's and I drive it every where. Does not overheat and I drive it long periods of times at 3500 plus rpms. Just my experience. There are so many variables that you really need a game plan. What are your goals. You can use flat tops and be at 9 to 1 with newer heads like #8's and be safe for lower octane fuels. Just some food for thought. More compression means more power which means more cam more gear etc etc.
Out of Line, Everytime😉
Joined: Dec 2006
Posts: 9,971
From: Melville, Saskatchewan
For a cruiser, stick to the LF2321 6CC forged dish pistons. With Felpro head gaskets that will put you around 9.2 to 1 vs your low 8 to 1 compression. You can then step up to something like the Lunati 217/221 cam vs the terrible stock cam . Step up to a 3.08 gear and mild converter, unless you want every **** box to blow your doors off.
same but different
Joined: Jun 2007
Posts: 2,952
From: Central Missouri
What is the benefit of high compression pistons? The answer is, more power throughout the engines entire rpm range.
Not just one part of it, like many speed parts enhance.
The key is building the right combination of parts around that with the proper tuning.
Not just one part of it, like many speed parts enhance.
The key is building the right combination of parts around that with the proper tuning.
Connoisseur d'Junque
Joined: Sep 2010
Posts: 21,183
From: The Hudson Valley
Benefits:
More power.
Better throttle response.
Better fuel economy.
Problems:
Increased oxide of nitrogen emissions.
Higher octane requirements.
Then you want lower compression pistons.
Changing the gears will not change your horsepower.
- Eric
More power.
Better throttle response.
Better fuel economy.
Problems:
Increased oxide of nitrogen emissions.
Higher octane requirements.
Then you want lower compression pistons.
Changing the gears will not change your horsepower.
- Eric
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