ok here is my problem.....im having a shop build me a LS/VTEC, charging me 850, for ITR pistions, new bearings, seals rings oil pump etc....( BTW i have my own gsr head), so couple days into the build he said he has a JDM B20 all ready to go with B20z pistons, if i wanted that one its 200 more, so my question is, is it worth that much more for the B20? what would my compression be with that set up? also im my goal is about 200whp so which would be the better choice here?

 

anyone?

 

LS VTEC!!! B20 has hella torque but you might miss the top end pull of v tec

 

if i had to choose i think id rather go with ls-vtec.It gives more power then the b20.but its up to you.

 

if its ls/vtec vs b20/vtec i would take the b20 vtec. I think these guys think you are trying to decide between lsvtec and a strait b20. the b20 has more displacement so more power. that is if the compression between the 2 finished products is the same

 

yeah i figured if the compression was about the same, then the two build would roughly be about the same in the end, BUT, if the ls/vtec has itr pistons, which would have about 12:1, and the B20 w/ Z1 pistons???? will the b20 build have around the same compression as the "LS-R" is the b20 worth more than a "LS-R"???

 

The LS-VTEC would have more compression and an easier time revving.
The B20-VTEC would have more low end, but the compression would only be 9.6:1 and unless you at least do ARP rod bolts you are taking more of a chance of spinning a bearing revving too high.
LS-VTEC would be more practical for power/cost/not blowing it up.

 

Ive been running a LS/v for a while with a b16 head, and its awesome. Now that im doing boost, i would love the 9.6:1 ratio of the B20.

MMMMMMM torque

im doing about 10psi

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4door89 &raquo;</TD></TR><TR><TD CLASS="quote">Ive been running a LS/v for a while with a b16 head, and its awesome. Now that im doing boost, i would love the 9.6:1 ratio of the B20.

MMMMMMM torque

im doing about 10psi</TD></TR></TABLE>
You gotta remember about the B20's thinner cylinder walls when boosting/spraying, they like don't to hold up sometimes.

 

i have had both set up from previous experience i say go with the lsvtec it rev up faster an it would have a better top end pull than the b20
an the lsv tends to make good power with the itr pistons

 

between the ls/v with itr pistons and other rebuild parts, compared to a b20z, you'll have a difference in compression with the b18 block, with a little over 11:1, while the b20z block with gsr head owuld end up being close to 10.15:1. the extra displacement of the b20 is nice and leaves possibilites for more power especially with different pistons, but at those prices i'd stay with the b18 with itr's

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMeman &raquo;</TD></TR><TR><TD CLASS="quote">ok here is my problem.....im having a shop build me a LS/VTEC, charging me 850, for ITR pistions, new bearings, seals rings oil pump etc....( BTW i have my own gsr head), so couple days into the build he said he has a JDM B20 all ready to go with B20z pistons, if i wanted that one its 200 more, so my question is, is it worth that much more for the B20? what would my compression be with that set up? also im my goal is about 200whp so which would be the better choice here?</TD></TR></TABLE>

i have both LS/V( ITR piston and head) and high CR B20/V( ITR head) both is a good setup, it hard to pick and totally up to you.

 

I would take either B20/vtec or LS/vtec if either of them are done right.

If you are just take a stock B20 block and putting a gsr head on it, i would not do it.

I would take the built ls/vtec.

My ls/vtec is at the shop now getting machined for OS P30 pistons and I'm having a 3-angle valve job and new valve stem seals put on. Also have ARP rod bolts installed and having the P30 pistons pressed onto the LS rods. Also they are decking the head and decking the block.

I will be assembling the whole thing myself with all OEM parts. Remember to use the right color bearings when they assemble everything.

My goal with my ls/vtec is 200-210 whp tuned with Hondata S300. LS block with arp rod bolts, OS P30 pistons, ITR head with 01 ITR/CTR Cams, ITR IM, ITR TB, DC 4-1 ITR Header w/2.5inch collector, full 2.5 inch exhaust, AEM ITR CAI. Everything is brand new. Nothing is USED in the motor rebuild. Every seal, gasket, o-ring, nut bolt, etc. Also using a Fidanza Flywheel with brand new stock ITR clutch.

There is a lot of work that goes into these builds.

Good luck.