What are some pros and cons of running ARIAS 8:4 pistons on a H22 instead of running 9:1 compression pistons.

Some one told me that i could run more boost on lower compression (dont know i that's a good thing)

 

run 9:1 compress, more boost on lower compression but also need more boost to make the same power as a hgiher compression motor. 9:1 is perfect

 

Allowable compression ratio depends on many factors, and there is no one right answer for every application. Generally, compression ratio should be set as high as feasible without encountering detonation at the maximum load condition. Setting the compression ratio too low will result in an engine that is a bit sluggish in off-boost operation. Setting it too high however, can lead to serious engine problems due to knock.
Factors that influence the compression ratio can include: fuel anti-knock properties (octane rating), boost pressure, intake air temperature, combustion chamber design, ignition timing, and exhaust backpressure. Many modern engines have well designed combustion chambers that will allow modest boost levels with no change to compression ratio, assuming appropriate tuning. For higher power targets with more boost, compression ratios should be adjusted to compensate.

 

Will a difference of 8.8:1 to lets say like 9.5:1 make a real big difference? I was advised by a rep at RaceEng that it wont make much of a difference.

Im thinking about getting a set of custom slugs made by Wiseco at 9.5:1 for a boosted sohc f22 or should I just save myself some time and money and just pick up a set of off the shelf wisecos at stock 8.8:1 CR.

 

9:1