I have a crx i wanted to swap either an ls vtec or a b20 vtec I was woundering which one is better to run at high compression?

 

i hear that b20 vtecs are not even considered motors they are considered monstors cuz they are so badass definatley go b20 but its hard so be carefull and make sure you know what you are doing!!

 

how much money do you have?

 

right now i have 8g's

 

If money is not issue, then b20/vtec for sure.

 

make sure you know the differences between b20's...b20a/b/z
"a" shitty *** prelude engine....
"b" good for the vtec head with lower compression...
"z" also good for the vtec head but with higher compression.
I love my b20bvtec...it pulls so hard with the benifit of more torque than say an lsvtec. I know there are a lot of guys on here that will tell you that the lsvtec is great, and i will probably go that route down the road for a turbo.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b20vtec ef8 &raquo;</TD></TR><TR><TD CLASS="quote">I have a crx i wanted to swap either an ls vtec or a b20 vtec I was woundering which one is better to run at high compression?

</TD></TR></TABLE> a freakin B20/vtec!!!!

 

If you are going to keep the stock block with VTEC conversion, I'd go with the LS/VTEC. the LS stock sleeves are better quality in construction compared to the B20 stock sleeves. keeping it 1.8L will also be good if on a budget and can use OEM honda 81.5mm pistons.

Don't get me wrong, the 2.0Lness provides alot of torque more than the 1.8L
I would suggest building up the B20 block to at least a basic rebuild with better pistons than the stock low compression piston.

If you plan on doing the motor up more like Sleeving to big bore, the b20 block is not a good idea as well. since the sleeves will be cut anyway to install the Iron Girdle Sleeves, an LS block will be fine. you can then bore out to 84mm/2.0L the LS block and achieve the same results as if using a b20 block.

If you stick with a non-sleeved block, the OEM pistoned LS block will still put out good numbers. a recent setup we did for a customer with LS/VTEC ITR pistons, stock GSR head, Upgraded valvetrain, RS machine cams, Bisimoto header, and skunk2 intake manifold, netted this guy 209 HP to the wheels, after tuning.

 

i had a ls/vtec setup...BUT...if I had a choice...definitely B20/Vtec

 

CRVTEC's are bad *** my friend was running one on his EF hatch thing has so much torque he broke the motor mount welds on the body, not just one of them they all went one after the other. He fixed it but had to custom make some brakets for more support to stop them from breaking off again.