as I Have learned. a b20 is nothing more than a bored B18. so you have paper thin cyl. walls. so no. I wouldnt run high boost. maybe 6psi at most.

 

maybe you didnt understand my post. B20 sleeves are monolithic design, 1 peice, any type of detonation the sleeves will crack from the inside out. So reguardless if you have forged pistons, big rods and a nice block guard the sleeves will crack. I had 12pins supporting my sleeves (called pin/post method) which is better than blockguards and it didnt even help. You can run about 8-10psi safely on a b20 with a conservitive timing map.

Trust me I know lots of guys who have broke sleeves in b20's. Its quite common for them to fail with fi applications.

jeff

 

b20 and b18 sleeves are nothing alike, b20's actually have very thick sleeves, but due to the weak design they are brittle as hell and crack.

 

READ http://dwolsten.tripod.com/articles/jan96a.html
then obviously the tons of people with cracked sleeves.