What is the best compression ratio for Turbo?
9 to 9.5:1
If you’re going for a higher boost on the street, you’ll want to stay lower on the compression ratio to avoid detonation. However, if you’re contemplating a mild boost of say 7 to 10 lbs, a static compression ratio in the range of 9 to 9.5:1 may prove to give you better all-around drivability and off-idle acceleration.
Is 9.5 1 a good compression ratio?
The standard recommendation for street engines running on pump gas has always been to shoot for a 9.0:1 to perhaps 9.5:1 compression ratio. This is in order for the engine to safely work with pump gas, which for much of the country, is limited to 91-octane.
What is E85 compression ratio?
According to Wusz, even given the cooling effect of E85, his recommendation would be to limit the static compression ratio to 13:1 on a 4.00-inch bore small block and slightly lower in a larger bore engine like a big block Chevy.
Does E85 boost horsepower?
E85 flex fuel is known for being more eco-friendly than regular gasoline. There’s another benefit of flex fuel that only a few people know about. It can increase your engine’s power!
What compression is best for E85?
How much compression can you run with a turbo?
Today, the average high-performance street or strip turbocharged four-cylinder race engine sports a compression ratio of 9.5:1, with some even running compression ratios as high as 11.5:1 or more on alcohol or E85. Modern technology allows our racing generation to get the best of both worlds.
How much WHP does E85 add?
The benefits of E85 really come from the higher octane (up to 110, depending on ethanol content and quality). This allows some of the same benefits you see when using methanol injection, meaning you can run more spark (if needed) or boost. This normally translates to 25-50 or more horsepower on a forced-induction car.
Can you run E85 with high compression?
This means if you were to run E85 in an 11:1 or 12:1 compression engine, E85’s higher octane would prevent detonation, which would allow you to run this higher compression ratio and take more advantage of the reduced Btu heat output by squeezing the existing air and fuel a little harder to make more power.
Is low compression better for boost?
The higher the boost pressure, the lower the compression ratio of the engine.
How much HP can you gain from E85?
Forced induction often nets the largest gains from E85, because you are not limited to just adding more spark, like an N/A engine is. More boost is a huge benefit and can net 15-25 hp per pound of boost, which means much more gains are available on forced induction versus N/A, when switching to E85.
Does E85 boost HP?