Will b18c1 pistons and rods fit in a b18a? Also, the pistons are 9.0:1 in a gsr, what will they be in a b18a if they fit?

 

I thought the b18c1 was 10.0:1 w/ stock pistons

 

These are JE pistons w/ eagle rods. The guy had them in his GSR...

 

ahh... check

 

pistons will fit. rods wont unless you get a gsr crank. and for the compression ratio. i am not sure.

 

You'll have to use either B18A/B rods with the 89mm stroke crank, or you can use the GSR-length rods with the GS-R's 87.2mm stroke crank. You cannot use the GSR-length rods with the 89mm LS crank.

The pistons should be ok. You'll just have to set the piston-to-cylinder wall clearance properly.

Compression ratio will be lower assuming that the piston-to-deck height clearance stays the same. I don't know if it does b/c I've never measured a stock LS block before and I don't know where the JE pistons like to sit on a GS-R block. It's probably .020" to .030" like other forged piston companies I know.

 

I decided to just say screw the 9.0:1 comp. pistons. The 9.2:1 will work fine for me. Thanks for all the helpfl info guys!