streetracer42084

i want to go ls/vtec but i am also considering going b20vtec which one is a better bang for my buck.

87na_rx7

is this going to be a n/a or a fi application? ctw this belongs in the hybrid forum

HMT-Admin

Ls/vtecs and Crvtecs are more or less the same thing. I'll make it simple, a Stock Crvtec (all motor) vs a LS/vtec (all motor) would put out more power and torque. However if you were to boost both these applications, yes the b20 will make more power, but not safely. The Crvtec uses mono/sami style sleeves, which are weak for boost, and if detonation occurs you will crack all the sleeves at once, and the block is pretty much junk.

B18a/b and a B20b/z Have identicle bottom ends, other than the b20's have 84mm pistons, and the goofy casting of the cylinders.

http://dwolsten.tripod.com/articles/jan96a.html

I personally would go for a ls/vtec, I would sleep better at night knowing I'm going to be safe running 22 degrees on the top end

Jeff

streetracer42084

i'm not going to boost right off the bat cus i wan to go all motor and beat a few cars with it and than later consider boosting.

beerbongskickass

LS/Vtec...

streetracer42084

why ls/vtec? i thought the b20vtec would be better if i wanted the torque cus i'm going to put it in my integra.

87na_rx7

for all motor applications yes... but not for boost as jeff already stated above

91dxcrx

a sleeved b20 would be the best

HMT-Admin

A sleeved B18 is the same thing? Let me explain something real quick

Once you sleeve a B20, you start with 81mm, which would turn your big bad boy 2.0l into a 1.8l again. All aftermarket sleeves for b-series start with 81mm bore. So if you sleeve a B18 or a B20 you have the exact same thing.

A sleeved GSR or ITR would be the best.

btw, it cost extra to sleeve b20's because they have homosleeves, and thats why most people prefer to sleeve B18's.

Jeff

91dxcrx

thanx jeff..i was not aware of that