Ls V Tec

[jaberg00]

What to expect from the whole set up, what will it do stock, is it worth spending the money ro do the conversions, By the way we need two COMPLETE VTEC heads. How much power will it produce?

[AzCivic]

turbo 'em.

[pdiggitydogg]

This is about as vague as "how fast will my car go?"

The power that it will make is all dependent on what the compression is, what the bore is, fuel pressure&ratio, etc...but mostly compression in this case.

Personally, I am against ls/vtec because as I have seen many times "it doesnt work". No, Im not gonna get into it, because there are a ton of posts out there along with entire websites devoted solely to the topic of it not working.

If you want a really good NA honda go with a b18c5 and build
If you want a really good turbo honda go with a b18c1 and build

[blind34_1]

heres a lovely little article about the down side to an ls/vtec engine, and what do you know, its on our own site!

http://www.hstuners.com/news/wmview.php?ArtID=5

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[IALuder]

how many times will we cover this subject.

i wouldnt do LS Vtec IMO. to much just buy a vtec motor.

[Honda_Tengoku]

Originally posted by SFKing
how many times will we cover this subject.

i wouldnt do LS Vtec IMO. to much just buy a vtec motor.
obviously not enough....

[Honda_Tengoku]

i read the article about why u shouldnt go LS/VTEC. I agree to a point, but I do disagree with a bit of it. It does work! I dont know where he got the RPM issues, cuz I have talked to people with a properly built LS/VTEC's having no problems into high 8,000 RPM range. I have always known the shortfalls of the LS/VTEC. None of that was really any suprise to me. Just realize the LS/VTEC wont last as long as a ITR engine. If it were me building it, I would do it over the ITR in a heartbeat and understand the shortfalls. Instead of a 100,000 mile ITR engine u just have a 50,000-75,000 mile engine (atleast with my driving).
Ok as far as heads go, I would use the B16a head. People say blah blah blah and go with the GSR head. Sure the GSR head flows a bit more. Sure it will make a bit more power stock than a stock B16a head. The last dyno I saw was 6 HP and 4 foot-pounds more torque. Truly its definately not worth it in my book cuz the GSR head is like 700 dollars more (roughly) than a B16a head. can u see yourself spending 700 dollars for 6 HP? I know I cant. Also something to think about is the B16a head has more potential than the GSR head for power. The GSR head dual stage runners are a flow restriction when u get to high RPM's and higher flow rates. Granted we are talking about a DPR stage 5 or Stage 6 port, plus combustion chamber modifications to the B16a head, but at that point the B16a head will eat up the fully ported GSR head any day.
Also I wouldnt turbo it either. The rod to stroke ratio is too poor for a turbo engine. Not saying it wouldnt work. The engine just wouldnt last long. Everyone that I know that turbos the LS/VTEC's they usually go boom (eventually). Why spend all that money to put on an B16a/or GSR head and everything to swap it over when u can just have your engine setup for more boost instead and make more power for the same amount of money u would spend. Besides VTEC heads arent really that great to turbo. VTEC is meant for N/A. It has too much overlap, especially the H22, CTR, and ITR cams.

[AzCivic]

i meant dont waste time and money putting on a stupid head when you could just "turbo 'em".

[AzCivic]

i think people need to stop jocking r/s ratio, d16's have a 1.52 (ls's have a 1.54)ratio rev to 7200 stock and last easily 200,000miles. the only thing a good r/s ratio is really good for is more dwell time at TDC and BDC allowing more time for air to enter/exit the cylinder. Bring boost into the equation and who gives a crap.

worrying about r/s ratio in a street car is about as smart as swaping out a d16 for a b16.

[IALuder]

just buy a vtec motor. it cheap and fast and defenitly more reliable. why waste your money for a crappy want to be vtec. better compression? who cares just buy a GS-R (b18c1 Vtec)