Rb25de Piston Specs

[Tumic]

Hi.

I've been searching for the 25de oem piston specs so i can calculate the compression and see how much i must shim the head to get a bit better compression ratio.

Does anyone have the oem specs? Would be nice to get the comp ratio up to around 12-13 (have E85 on every gas station in Sweden)

But im affraid i will have to do custom pistons for that ratio?

[KiwiRS4T]

Assuming your car is a manual you should probably get a Neo head and the ecu loom and bits to go with it.

[Ben C34]

Neo head would get the compression up very nicely.

Maybe too much but certainly worth looking into.

[Bronx]

hows that valve piston clearance looking?

[Tumic]

Neo head is so rare in Sweden so it's not an option for me, trying to put togeather the best setup i can with the parts i have in my garage.