Is higher engine compression better?
Is higher engine compression better?
A high compression ratio is desirable because it allows an engine to extract more mechanical energy from a given mass of air–fuel mixture due to its higher thermal efficiency.
What do high compression pistons do?
Higher compression allows for a larger amount of fuel/air mixture to be successfully combusted, ultimately resulting in more power produced during the power stroke. However, there are limits to how much the mixture can be compressed prior to combustion.
How are piston compression height and rod length related?
The relationship between connecting rod length, piston compression height and compression ratio is often misunderstood, largely due to the misuse of the term “compression.” In all honesty it probably shouldn’t be applied to piston terminology at all except as it relates to the volume of the piston crown surface.
What kind of pistons do I need for a 1.8T VW?
JE piston sets for the VW/Audi 1.8T 20V engine are offered in 8.5:1 or 9.25:1 compression ratios. Lower compression pistons (8.5:1) will allow higher boost levels on lower octane ratings with less chance of knock and cylinder detonation than higher compression ratio pistons.
Which is better lower compression or higher compression?
Lower compression pistons (8.5:1) will allow higher boost levels on lower octane ratings with less chance of knock and cylinder detonation than higher compression ratio pistons. Lower compression will sacrifice out of boost power, spool time, and power/torque per pound of boost. Choose your compression ratio accordingly.
What kind of pistons are used in Je?
Meeting the extreme demands of today’s ultra-performing race teams, JE Pistons are engineered, manufactured, and verified using during a Critical Process Program unique to JE.
JE piston sets for the VW/Audi 1.8T 20V engine are offered in 8.5:1 or 9.25:1 compression ratios. Lower compression pistons (8.5:1) will allow higher boost levels on lower octane ratings with less chance of knock and cylinder detonation than higher compression ratio pistons.
Lower compression pistons (8.5:1) will allow higher boost levels on lower octane ratings with less chance of knock and cylinder detonation than higher compression ratio pistons. Lower compression will sacrifice out of boost power, spool time, and power/torque per pound of boost. Choose your compression ratio accordingly.
Meeting the extreme demands of today’s ultra-performing race teams, JE Pistons are engineered, manufactured, and verified using during a Critical Process Program unique to JE.
What’s the best compression ratio for a Je engine?
For most engine builds we recommend using a higher compression ratio piston (9.25:1). Speak with your engine tuner about the fuel and boost pressures you will be using to determine the best compression for your engine. JE offers your choice of bore size to suit your build.
