Anyone know what the head CC of the rb25 is?

[93semax]

Trying to get Wiseo pistons but they don't know what the head CC is and can't tell me what the compression ratio is going to be.

also does anyone know what the CR would be if I used RB26 pistons?

[93semax]

Thankf for the Basic info but that doesn't help me. Head CC's are different.Anyone else?

[FAST-DATSUN]

There are pistons from American companies , like ARIS, CP, Wisco and JE for the RB25 and 26......

[Nameless EJ6]

What do you mean by head cc? Are you asking the combustion chamber volume or something?

[93semax]

There are pistons from American companies , like ARIS, CP, Wisco and JE for the RB25 and 26......

I'm trying to get Pistons from Wiseco... HOWEVER they don't even know the compression ratio of their pistons..

Why don't you just buy yourself some Tomei, Greddy, HKS, Blitz, or Apexi pistons that are already pre-made for the RB engines instead of trying to get some other company to make em?

Because most of them are made by american companies and can be found cheaper.

IE: RB25DET Wiseco Pistons with rings are only $615.

[Nismo_Freak]

Thankf for the Basic info but that doesn't help me. Head CC's are different.Anyone else?

He actually gave you the numbers for a good estimation.

I'd go with 52cc

[93semax]

He actually gave you the numbers for a good estimation.

I'd go with 52cc

Yes and it's basic info. I know those by heart and they are only part of the CR equation.

For your 52CC,what are you using for deck height, dome volume and gasket thickness? When I use your 52cc and wiseco's pistons specs I get a 8.51:1 CR which seems right but I cannot be sure. Some told me over at SDU that the head CC is 63 which seems to high.

I might havw to take plexiglass and a syringe and measure it myself

[Nismo_Freak]

Yes and it's basic info. I know those by heart and they are only part of the CR equation.

For your 52CC,what are you using for deck height, dome volume and gasket thickness? When I use your 52cc and wiseco's pistons specs I get a 8.51:1 CR which seems right but I cannot be sure. Some told me over at SDU that the head CC is 63 which seems to high.

I might havw to take plexiglass and a syringe and measure it myself

That actually sounds realistic... the RB25 shares a similar displacement per cylinder as the SR, and the SR has a rough 66.8cc displacement at 8.5:1, and a 62.6cc displacement at 9.0:1.

Something you might want to think about... but it really depends on dome dementions, deck height, and headgasket thickness as you said.

[Nismo_Freak]

Why don't you try calling some of the piston manufacturers that make the RB series pistons... ask them about the head cc.