Freestyle lowering compression

[lakeboy183]

i am buying a new ski that runs on av 100ll fuel and i would like to lower the compression to run premium pump gas,, it has an ada head on it and the guy said i just need to cut the existing domes or buy new domes, he said ada domes will work. the engine is a 820cc stroker with able cylinders.. so what i m asking is will just any ada domes or will they need to be custom made/cut for the engine??

thanks.Nolan

 

[Waternut]

You'll need to know more information about the pistons I think. If they were custom cut to start with for the RIVA flat tops or dominator semi-flat top pistons, you may have to get them cut again or get a new set custom cut. The problem is, normal pistons have readily available domes that you can buy but others have special requirements.

 

[yankeeboy]

I guess it would depend on if you ran flat-top or round top pistons, and how big your bore was- to determine what domes you could use.

edit: waternut beat me to it.