Quote Originally Posted by SCOOBYCROSS
Matter's if you go with a b20 block or b18b block on the stroke & bore... the b20 block is like a 92mm stroke... and produces more power (especially under boost) than the GS-R in the end....
B20 block=LS block with bigger bore

B20 Block=84mm BORE and 89mm STROKE
LS Block=81mm BORE and 89mm STROKE

the b20 and ls use the same CRANK AND RODS.
NA or BOOST the B20 is pretty powerfull. but it has limits. B20 blocks use a different type of sleeve that is actually somewhat thinner than a standard B series sleeve.

GSR blocks can make 450whp with stock sleeves, so can LS motors. but B20 block i havent heard of any making over 350whp on stock sleeves without the sleeves giving out.

the only B20 with a bigger stroke is the old B20A's from the 89-91 prelude. they had a 95mm stroke