thoughts on vtec
 

;D

buk tasted vtec for the first time today.. i basically stuck the speedo cable into the vss.. and wrapped it with electrical tape :D

works but the needle is jumpy.. lol

first thing i did is floor the piss outta it and i can tell the difference right away.. especially on the freeway run i took it on...

where before this thing felt like it was breathing through a straw basically now it feels opened up.. definaltly feels alot faster and definatly feels like ill be getting alot better mpg :D

ive been driving the b16 rex non vtec because of the VSS issue now for the past month and a half or so and damn the difference between the two is night and day ;D

cant wait for the gsr rex to get finished :(

Re: thoughts on vtec
 

I can't wait for you to sell me that transmission. It's gonna be awesome

Re: thoughts on vtec
 

haha guess what i found out my problem is.. i just need to adjust the clutch pedal only get this.. the entire ------- plastic assembly looks melted.. or maybe even aten from battery acid from an exploded battery :D

so i need to change that and no more issues with this swap at allll

Re: thoughts on vtec
 

Its screaming for boost O0

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i remember when i thought dohc vtec in a crx was fast ^-^

Re: thoughts on vtec
 

BOOST IT!

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and i have everything i need to do that too.. all id need is a chipped ecu and a clutch for some basemap lovin'

Re: thoughts on vtec
 

single cam vtec... overrated.

i did a mini me on my POS 8 valve d15b8 -> d15z6. i jumped form 70 Crank hp to about maybe 110 Whp.. (i also did the basic I/H/E)

although a nice extra 50 or so ponies i got out of it. i can't really feel it stupid Cx transmission.

2nd gear 7k rpms = 80MPH (can't really use vtec... at all really.)

although i must admit my buddies LSV when it hit.. on a DOHC.. it hits HARD. but still overrated IMO

Re: thoughts on vtec
 

If people want y1 lsd transmisisions I should have another 2 by june its what buk is running. Glad the vss worked out for ya. Time to throw away that gsr manifold and get some baller stuff from me :y

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this is the b16 rex im talking about.. unfourtunatly the gsr rex isnt done yet :(

thread number 4 going up in a second.. this ---- blows...

Re: thoughts on vtec
 

pbtuning stickers on the cars :y

Re: thoughts on vtec
 

<--- waiting for someone to come in here and ---- on this thread (particularly JD, BDVT, or johnny)

Re: thoughts on vtec
 

JD Im sure will be more in buk's side for actually getting out and working on this stuff and actually getting it to work

Re: thoughts on vtec
 

lol hence why your a moron who drives a srt-4

Re: thoughts on vtec
 

well... what i do know is that people praise vtec left and right, but i just dont get it. sure its good for when you throw the hammer down every now and then to pass up the usual idiot, but i just dont get why people specifically get vtec heads. they are looking for a performance upgrade, so why dont they just get performance cams? i can understand teh heads are a lil different, but still...

Re: thoughts on vtec
 

vtec head with cams > non-vtec head with cams

They aren't that much more expensive (unless you're talking b-series), and have more potential. If I was boosting a B on a budget, probably wouldn't ---- with it. But it's definitely an improvement, so might as well get it.

Re: thoughts on vtec
 

i'm somewhat new to the game...started off with a d15, then boosted---went to ls, then boosted---just put the gsr in and felt vtec for the first time, and IT IS SWEEET :y ....waiting for the wastegate to get here then----BOOST!!! :7

Re: thoughts on vtec
 

but whats so special about the heads themselves?

Re: thoughts on vtec
 

I don't understand your question...

You need a vtec head for vtec, and vtec is better than non-vtec. It's not a blow your pants off difference, but it's a definite improvement.

Re: thoughts on vtec
 

vtec is just another thing to get fucked up to me, another batch of cells to tune and another reason for new tires every 2 months you got to love the wastegate opening and at 4500 then hearing vtec crack open at 5. over all people do think its greater than it is tons of cars have variable valve timing

Re: thoughts on vtec
 

he is asking why a vtec head is better than a non-vtec head with big cams which would theoretically accomplish the same ----. While ill admit ive never done any hardcore research, i believe the vtec heads themselves flow significantly more than the non-tec heads. So by using a vtec head you are starting with a better platform.

Re: thoughts on vtec
 

You get a broader powerband with two sets of cam profiles. A non-vtec with big cams doesn't accomplish the same. Each cam profile is going to have its "sweet spot" where the valves aren't opened too long or too briefly. Sure, non-vtec and a fat cam you'll have better top-end performance which is most likely where you'll be doing your "performing" at anyway, but bottom end won't be as good as a vtec head. Top-end will be just as good on a non-vtec (depending on cams), but lower end will suffer.

Re: thoughts on vtec
 

honestly i dont understand why there is even any fuss by this. i drove two different vtec equipped civics, both d16z6 and couldnt even tell there was vtec. honestly to myself i probably wont even touch it. if i do, i do, but as it sits now i havent even had the slightest urge to go vtec in my hatch. i think honda did it right the first time when they had the d16a6 in the US si civic/crx.

Re: thoughts on vtec
 

i dont think he (kain) was asking about the powerband down low, and my post wasnt in reference to that either, sorry i left that out. I think a non-tec head (b-series at least) with cams will take a decent amount of work to equal the flow of a vtec head (especially with cams), but i dont know so dont listen to me lol

Re: thoughts on vtec
 

ah ok. i understand. i just dont understand why they think they are getting that much more power. i understand about low end drive ability, but i think most people dont give a ----. i know i for one dont give a ----.

my first 2nd gen had something similar and everyone swore that taking the system out wasnt a good idea and blah blah blah hurt low end driveability blah blah blah. taking it out and disabling it improved my overall driveability, and i gained some hp too. but then again,, in the rx7 you have ---- blocking the air stream.

if the geometry of the head is different, then i understand. but if its the same, then i would be the guy to just throw in some cams and give it a nice tune.

Re: thoughts on vtec
 

Basically, as a cam spins faster, the valves are open for shorter amounts of time, and its harder to move air out/in. You don't want them opened too long or it'll hurt performance. With vtec, instead of having one point where the cams are very efficient, you'll have two, and it stretches the powerband out a bit. Non-vtec is tuned for "decent" performance all around, so it's range of efficiency is probably close to the midway mark of the rpm range. VTEC it'll be tuned closer to having efficiency at both the bottom and the upper end, so vtec engines usually end up with more power because they can open the higher end up without sacrificing low-rpm driveability.

I don't really see how vtec would be much different than a non-vtec with fat lobes, since you're going to be revving high anyway which is where the cams will be tuned for efficiency. For the widest powerband, vtec is better to have though.

If they ever come out with a continuously variable valve timing, that would be optimal, and a bitch to tune.

Re: thoughts on vtec
 

well from what i heard you cant feel the difference in sohc's but dyno will show the difference..

i definatly felt the difference in my rex.. and im sure dyno would show a difference too?

Re: thoughts on vtec
 

i couldnt tell ya either, ive never driven a b series before. but i have driven and h series and i love the vtec when it kicks in on it.

Re: thoughts on vtec
 

buy my crx and swap the b16 into the 7 ;D

Re: thoughts on vtec
 

Well ported ls b18b1 heads dont even flow what a stock b16a/b18c1 head does. This becomes an issue when you start to want to make large power#'s


The ls valvetrain/rocker assembly also doesnt except that large of cams and has major issues with high rpm's


You have never even taken either apart so your talking again out of your virgin ass. Vtec heads the dohc form are so popular for a reason out of the box they had bad mofo's. The rocker assembly is bulletproof and can handle whatever you throw at it.


Conclusion ls heads are cool and nothing wrong with them but the vtec head is the hot blonde in the class the ls head is the kinda chubbby cute girl.

Re: thoughts on vtec
 

i hate my B16... feels like my D16Y8.

it's definitely a little more fun to drive though.

never ever again will I buy another B16.

Re: thoughts on vtec
 

how the ---- am i talking out of my ass?

Re: thoughts on vtec
 

Cause your talking about a subject you have never even dealt with. Have you ever even worked on a honda motor thats what I thought

Re: thoughts on vtec
 

Re: thoughts on vtec
 

i have, and i understand exactly how vtec works.

i was a forum regular on the old honda d series forum.

Re: thoughts on vtec
 

A DOHC vtec head is much different than a D series vtec.

Re: thoughts on vtec
 

in my expereince if you are messing with single cam engines and your car came non vtec then leave it alone. i had a crx si with the a6 and spun a bearing after a year or so. then i got a z6 and it felt the same as the a6. if you drive a single cam vtec car and vtec doesnt work, then it sucks ass, but when it works there is no surge of power at all like in a b series, it is a smooth transition.

going vtec with a b series is worth it for the reasons chris stated. in stock form they are a lot better flowing and can rev higher. to me this goes back to if your car came with vtec then i would use a vtec head cause its all ready to go, but if i was swapping b series into a non vtec car then i probably wouldnt worry about it unless i was going for big numbers

Re: thoughts on vtec
 

yeah. i didnt realy understand if there was any major difference in head design as far as how the runners are designed and whatnot.

Re: thoughts on vtec
 

vtec says: "Spaaaaaaaaaaaaaaaaaaaaannnnnnnnnnkkkkkk!!!!!!!!!! "

Re: thoughts on vtec
 

well your an Ardtard!