Performance wise, what is a better set-up, an ls-vtec or b20-vtec? I’ve read through the few threads on here comparing the two because most compare them to the B16, not eachother. I believe the CR-VTEC is quicker because it has a bit more TQ? Is this correct and if so how much? Is it really a big diffrence between these two set-ups? Thanks
choice of pistons.
ls-vtec can take advantage of cheap(er) OEM pistons
cr-vtec needs aftermarket pistons
as well as a bunch of other stuff…
well one is a 1.8L and the other is a 2.0L…then again the 1.8 has thicker sleeves opposed to the 2.0 which is techinically just a 1.8 stroke out. to each their own.
then u can also compared the torque gains of cr-vtec.
But. Cr-v is a truck motor an integra is made for the sport luxury type deal, made for a 7000 redline even past that. The cr-v motor is not made for that kind of beating.
but the truth be told, with the right amount of money and parts it CAN be made to handle that. but the better idea would be to reinforce the block a bit, balance the bottom end, and boost it. you’ll get plenty of power, with a pretty nice bump in torque to go along with it. with the right amount of cash, the b20 block CAN be the best bang for the buck block out there. its just once you start getting into serious power, its not about having a good “bang for the buck” quality to it. then you just have a really expensively built b20 block.
IMO, the b20 is better if you balance the bottom end and have the cylinder walls honed to be “like new” again. you WILL gain a pretty good amount of torque. just know that b18 block can handle more rugged abuse right out of the box so to speak.
ALL MOTOR i’d say LS/VTEC all the way (UNLESS of course you have fully re-inforced the bottom end and balanced it :blah: ) due to the b18’s stronger cylinder walls and higher revving potential.
BOOSTED APPLICATION: B20/ block with an LS head (essentially the same head as the b20 same casting i do believe but the valve springs and rocker arms etc. are capable of slightly higher revving in a stock LS) if you’re boosting and the bottom end is built right, you don’t need vtec lol.
Thanks for all the comments guys. 
to answer the question, a b20 will always make more power. regardless of compression. added compression alone, can’t replace the broader powerband produced by a bigger motor. for example, i had a bone stock jdm b20b (9.6/1 c.r.) bone stock pr3 head, port matched p30 im, im heatshield gasket, itr cams, mugen 4-2-1 header w/2.38" collector, no cat, 2.5" mandrel exhaust, generic 3" intake w/HKS filter, tuned on hondata. 200whp 142wtq. 7600 redline. it was a basic $2000 set up after tuning. my boys lsv makes very close to the same power, but, he needed almost 2 full points more compression, stage 2 cams w/cam gears, p&p head, itr im, 64mm t/b, forged rods and pistons (road racing), p72 girdle, full balanced motor, arc intake w/HKS filter, rs-r header 2.5" collector mod, not cat, 2.5" mandrel. do you have what it takes to make an lsv fast? lastly, RS Machines makes cast 84mm-85mm usdm itr spec pistons for b20 blocks. there are some cats out in socal making 240+whp on 91’ octane, daily driven, oem unsleeved b20 bottom ends with these pistons. and, don’t forget those vtec oil and water pumps for all frank conversions.
^^^^^^^^^^^^
:werd: :iagree:
Werd…i agree…B20’s will always make more power. CR-Vtec motors beat LS-Vtec,GSR,Type-R motors. My boy has one in his Gen 2 and woops it to them type-r boys…
on the other hand, I’d feel a lot more comfortable driving the built LS/VTEC a couple thousand miles than a basically untouched CR/VTEC on reliability
why? because you are too cheap to tune? that is the key to owning a reliable frank swap…just remember to upgrade to vtec oil and water pumps and keep the revs in the 8000 area and your fine.
I don’t trust a stock bottom end designed to work around 6k to hold together reliably at 8k. If I were spending my money I would build the bottom end, regardless of block. Reliability is more important to me than max power per dollar.
wow ome people dont know…
ive done both built and stock and by far the B20/Vtec out does the competition…
i used the B20Z bottom end, but it was actuall a 8.8:1 compression pistons, i worked at honda at the time so picked up some 9.6:1 compression pistons for nothing out of a later model CRV, new rings, went ARP rod bolts, Honda OEM bearings, ARP head studs, new mains, GE head gasket (later swapped to another cometic), 2000 stock Type R head, rebuilt of course… both were leveled, hot tanked and the block was a nice hone… after some street tuning and some good ole 91… hit the dyno…
186HP
146 FT LBS of torque
ran good and the kid i sold it to hasnt vlown it yet… and oh ya… visited 8k daily and smashed a lot of SRT`s… and pussy ass single cams…
EDIT: b4 anyone says,… ah ur numbers r low… everyone knows what im talking about… stock header and Intake… thats the way i roll…
Originally posted by too_cool_3
Performance wise, what is a better set-up, an ls-vtec or b20-vtec? I’ve read through the few threads on here comparing the two because most compare them to the B16, not eachother. I believe the CR-VTEC is quicker because it has a bit more TQ? Is this correct and if so how much? Is it really a big diffrence between these two set-ups? Thanks
Apples versus Oranges…
you believe CR-VTEC is quicker? oooh ok, the motor itself is quicker :giggle:
lego builders…tsk tsk tsk
What will this go into? A car…well holy shit. Here let us have this car just magically have everything contribute to this awesome CR-VTEC because it has A-BIT MORE TORQUE.
Torque is not the leading factor of what is quick or not.
-Hoots
funny because torque always gets you off the line quicker…
Funny because you could be ignorant about a suspension/tire package.
Funny because the torque from one engine can decline faster than the other.
I guess this subject is just funny.
-Hoots
CrVtec Hands down.
a CRVtec with the Same mods as a LSVtec will b handsdown faster… the only way a LSV would have more in it was because of a displacement increase and more performance upgrades as in internals… there is no way a B20V and a LSv with stock blocks are ganna be a tight competition the B20 hands down everytime…
oh and FYI: i have built with the help of Dj Nex a B20 Vtec with 2.2L of Dis. and a R/S ratio of a CTR motor, with a custom legnth rod setup and completely balanced P75 crank… i think we know a little something something about building hybrids or frank motors… so there u have it… B20 hands down…