Higher compression ratio in an s3?

[ian52]

Basically im running an ARY engine in my s3 instead of an APY engine so now i have 9.5 to 1 comp ratio instead of 9 to 1. Can anybody think of anything that i should be wary of or look out for running higher compression? I know i have 19mm wrist pins before anybody mentions that. Just thought i would check to make sure.

 

[<tuffty/>]

High boost will be the biggest issue... high comp ratio, high boost, higher cylinder pressure, weaker rods...

As you have had issues with boost (in a previous thread) then cap it with an MBC...

<tuffty/>

 

[ian52]

Yeah,im just running it at 5 psi just now with the n75 unplugged. Getting a manual controller to plumb in with it off my mate to see how it goes. Im just running it on super unleaded too.

 

[Andrew@A.L.D]

Welly is running that compression ratio but he has the rods to take that pressure