I have a chance to get some 84mm 11.5:1 pistons, brand new, for a B20. But the question is, will these pistons work in my B18C1. The bottom end is at the machine shop now, it already has brand new darton sleeves. I'm pretty sure the pistons will work but I am unsure of the CR with a GSR head (since the pistons are for a B20) And will the wrist pins work. I don't want to have to get new rods, because I already havre Eagle rods. The car will be running on 93 octane.

 

I went to Cspeed's CR calc and came up 11.6, but I think it will be more like 11.9 because the head is milled.