Dec 7, 2004 · If I'm going from 9.8:1 to 11.1 how much HP gains am I looking at? Also is there a special cam needed for higher compression? Would I be able to run my current cam and set-up on 93 …

Nov 28, 2015 · So how does an engine’s compression ratio affect performance? All other factors being equal, an engine with a higher compression ratio will deliver a higher thermal efficiency.

Oct 2, 2018 · By adding in extra valve overlap between the intake and exhaust, you get a decreased effective compression ratio...allowing the car to survive low boost at high compression ratios.

May 3, 2025 · Related Questions Q: How does compression ratio affect engine horsepower? A: Generally, a higher compression ratio can lead to increased engine horsepower, up to a certain …

Mar 12, 2019 · With the combustion chamber being the root of all horsepower, it only makes sense that you start spec'ing an engine build there. One of the key variables in engine building is compression …

Mar 27, 2018 · Air density changes affect the horsepower in a gasoline-fueled racing engine in one manner. In an alcohol-fueled racing engine, air density changes affect horsepower, but not as much …

Feb 23, 2024 · How does an increased compression ratio affect engine performance? To understand how increasing the compression ratio affects performance, we have to start with understanding what …

Jan 23, 2015 · An engine’s compression ratio is a big deal. You never see a low-compression racing engine unless it is arbitrarily limited by some class restriction. Higher compression ratios yield more …

May 30, 2003 · ok, i was wondering if anyone had a link to a compression ratio to horsepower calcualtor or could explain how c.r. relates to hp? i understand that 289's have 58cc heads with a 9.3:1 c.r. …

Dec 19, 2008 · We have specifically tested compression ratio changes only probably 3 or 4 times on our dyno and raised compression along with a few other things probably twice as many times. I can say …

Aug 11, 2000 · In an internal combustion engine, a piston compresses a large volume of a mixture of fuel and air into a very small space. The ratio of the maximum piston volume to the minimum …

Nov 19, 2019 · For low-boost applications, this chart shows the impacts of a compression ratio change at 15psi of boost. Notice, the higher the compression ratio increase, the higher the performance gain …

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Yuh and Tohru conducted a research on the effect of higher compression ratios in two-stroke engines. The results show that the actual fuel consumption improved by 1-3% for each unit increase in the …