hey i just purchased a b21 block which is kind of far only comming out of the 1900 prelude si and i was wondering the block is bear nothing but the block what pistons and rods would be best to use? do i have to use ones for a b21? or can i use them from a b20 apllication? i want to run all motor and like 12:5 compression. any ideas let me know by the way i purchased the block for 99 bucks and it had good bearing and all.

 

that b-series motor is the red headed step child of the b series family. nothin is interchangable in that motor expcept the crank. the crank is a 95mm (i am almost postive) so you could but that in a b20b or b20z block and make a ****** torque monster.

 

you just wasted your money on the b21....unless you are putting it back into the 91 prelude!

 

the only thing you can use is the crank. Don't even waste your time on that motor..

 

i have a real deal B21 block for sale....B18 LS block sleeved to 84mm with a Eagle stroker kit consisting of a 95mm stroke. Check the sig...woo woooooo.