hey i got a question? i got a gsr cp 81.25mm oversize bored and i was going to put it in my ls block with ls eagle rod and crank. any suggestion that they will fit?any have done it before let me know thanx

 

Wrist pin size should be the same but rod length will not be. Thus with an LS ROD they will stick way way down in the hole.

 

The compression heights on all the standard B-series motors (B16A, B17, B18C, B18B, B20b) are the same, at 1.181 inches. The compression height of a piston is the distance from the wrist pin to the top of the piston crown, basically determining it's positioning in the cylinder. If you look at JE, Arias, or Wiseco's catalogues you will see that many of the pistons for different motors actually share the same part numbers. If you're using an 89mm LS stroke crankshaft and LS length connecting rods in a standard B18 deck height block, your CP pistons marked for a GSR will indeed work with your motor.