JDM_tuning

hey guys what do you think is better in a eg hatch...b20 vtec or ls/vtec?? or should i just swap a b16 ?

and if im doin a ls or cr vtec swap what head should i use? i heard that the b16a has the best air flow

drift_n_shift

b20/vtec. i think the type r head has the best flow, but it costs more, and its not that different from the b16a head. so yea, go b16a2 head and b20

civtegra90

id say B20-vtec for an all motor setup or low boost, the ls-vtec for higher boost.

the b20 will make more torque.

type r head and b16 head are the same casting, only difference other than cams, springs and retainers is a slight port job from the factory.

the type r flows better whether your talking bare head or complete.

you will be disappointed if you put in a b16, you'll run low 15s all day long, the cr-vtec should run low 14s all day long if not better, doesnt sound like a big difference, but it is when you're at the track. leave the b16 to the crx

However, the B16 is nice for a quick, reliable daily driver...

heres my CRVtec: http://www.gtcars.ca/online/automoti...tec-build.html

true_werd

I'd say ls/vtec. The b20 has very weak sleeves and becomes unreliable around 215-220 whp. Now if you have the extra money to get the block re-sleeved then i would go for the b20, but if not go for the ls. thats just my 2 cents

JDM_tuning

ya i heard that about the sleeves to..whats the difference in hp and tq between ls/vtec and b20 vtec? and im gonna build the b16 head with cams springs and probably a port job and a intake manifold so the air flow should be alright..i think with the ls/vtec i should have about 170-190 whp..but the b20 vtec sounds nice so i dont kno..and the b16 valves are bigger than the ls so there isnt alot of piston clearence..especially with higher cams..so wat pistons should i use ?? i was thinking the type R pistons?? let me knw thnks

and which is better the b20b or b20z?

drift_n_shift

i highly highly doubt the ls/vtec is gonna be 180/190whp unless you run high comp. and have a good tune. you can't go wrong with b20/vtec man, you get a .2 litres of extra displacement.

actually, first and foremost, what are you're intentions for the motor? boost, n/a?

JDM_tuning

well for this summer im gonna leave it n/a but i want at least 180 whp with some mods..but hopefully by next summer or the year after, build it and boost it..the thing about the crVtec is the sleeves are weeker and i dont know what kind of pistons to use..and i dont want to spend 600 on just pistons or to get them milled..so i dont know.. lol i want the crVtec though but an ls might be more convenient i think

IntegraMark

iTrader: (1)

if you're building a motor you pretty much gotta decide on which way your going before you build it. you can really decide to build for n/a then switch to boost. internals will most likely be totally different.

i'll give the outlook from a costs POV

i'm doing the ls/vtec for cost reasons. i got a free bottom end and pistons were cheaper. i went with PR3 (b16a) pistons on shot peened LS rods, a balanced/micropolished LS Crank and GSR Grank girdle. compression ratio should be 11.4-6:1.

i'll give you the outlook from a costs POV

with the b20/vtec you gotta buy the bottom end which could be 400-800 bux and then buy Hi-Comp pistons of the 84mm bore where as the for the LS/vtec you could pick up an LS for 100-200 and use almost any OEM Vtec piston. for it to be reliable and handle high revs you gotta rebuilt it properly anyways. i got my pistons and rings from RS Machines and after it was all said and done i paid $190. they come with coated skirts like the type-r's. high compression piston for a b20 were almost $300.


it's all up to you if you wanna spend that extra 400-600 bux.

JDM_tuning

im gonna build the ls/vtec and build it with forged bottoms...if i boost the ls/vtec do i have to re-do the sleeves?? and what internals are best for their price?? not to expensivee

i tihnk for now im gonna build the ls and turbo it and than next summer throw a vtec head on it

true_werd

if your doing an ls with 7-10 psi you should be fine, but anything more than i would sleeve it for safety

drift_n_shift

turbo system aren't a cheap thing to do. mostlikely you'll need a good tune after you piece together a small turbo system, and that ain't cheap.

i say build it ls/vtec this summer and turbo next year with the right parts. or you can get a d16z6 and boost that this summer (its cheaper and can handle good boost on stock sleeves).

as for best internals, i would say je, or weisco for pistons, eagle for rods, gsr crank. if you want to make serious power, anyone would recommend sleeving.

how about this, for this summer, if you want boost, piece together a turbo kit, get a d16z6 and boost it and have fun. build an ls block on the side, so that next summer, you can re-use that turbo kit (minus the exhaust manifold) and boost your built LS (maybe ls/vtec).

that is, unless you have the cash to build the ls and turbo this summer, but its gonna cost roughly 3000+ (parts, labor, somewhat of a tune)

JDM_tuning

im thinking of the d16 turbo now..how much boost can it hold? my budget is around 2500-3000 and i want to make at least 250 whp boosted.. i can get a full turbo kit for a grand...

drift_n_shift

no joke, i've seen people go up to 25psi on it, stock sleeves. but i would run around 10 or more depending on tune/sleeving. if you get a d16, get a d16z6, its the best one. you need arp head studs, eagle rods and wiesco pistons, injectors, walbaro255 pump, and you're literally good to go (you should rebuild it/hone or bore at this stage depending on the kms on the motor). also, for the head, either re-build it, or just slap in a zex cam. but you need a good tune, and if you have left over money, you can invest in a new intake manifold (skunk2), bigger injectors, bigger throttle body, sleeving, d16y8 head (flows better) etc.

if you're looking for a z6 lemme know, i might be selling my 162,xxx km one that i was gonna use in this exact turbo build.

drift_n_shift

im also thinking about going ls/vtec or b20/vtec. which would you suggest for an allmotor (n/a) setup, making (or capable of making without boost) 200whp+? the setup would be more of a track/canyon racing setup and i guess, kinda of rev happy. any ideas appreciated

JDM_tuning

alrightt i gess thats wat im gonna doo for the time being..i can make some nice numbers with that set up i think