Do the B18 and B20 use different blocks or does the B20 have a larger stroke and/or bore to get the larger displacement? And why has the B18 become so much more popular than the B20?

 

A lot of it may have to do with availability. There are probably more Integras than CRV's on the road.

 

The B20b has thinner cylinder walls and weaker rods than the B18b. If you look at the specs on the two, you'll see that the B20b is just a B18b w/ a bore of 84mm instead of 81mm. Hope this helps.

 

If you want a b20 make sure its a B20z2.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Alex33 &raquo;</TD></TR><TR><TD CLASS="quote">The B20b has thinner cylinder walls and weaker rods than the B18b. If you look at the specs on the two, you'll see that the B20b is just a B18b w/ a bore of 84mm instead of 81mm. Hope this helps. </TD></TR></TABLE>

this is not entirely correct.

A b20 uses an awkward "siamese sleeve" design where the sleeves all share a wall, rather than being 4 independent sleeves, like in a B18.

B20 rods are absolutely identical to B18B rods.

when it comes to part selection, you can treat a b20 as an LS with an 84mm bore.

B18 blocks are more popular because there are more of them, and they are typically cheaper than B20 blocks.
-Mike

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ickabod &raquo;</TD></TR><TR><TD CLASS="quote">If you want a b20 make sure its a B20z2. </TD></TR></TABLE>

or just b20z

some b20b's have a 9.2:1 cp, or something like that. this topic has been beaten to death..i can go on..

 

thanx for mentioning that, it completely slipped my mind. btw, this trial user thing sux anus, hahaha

 

I have a Mildly Built 2000 b20vtec for sale. Pm me for details.

 

thx, all this helps. I dont have a license or car yet but i am pretrty sure i am gettin a civic ek hatch. I mite be interested in the built B20vtec in a year or two

 

Call r-crew, or go through me if you want em cheaper, Dan only sells the b20's as long blocks. he has b's and z's available.

 

The B20 block and B18 block are pretty much the same except the b20 has a bore of 84mm and b18 has 81mm

 

B20 has bigger displacement and plus it's more tourquey then the B18