turning non-vtec into vtec

[civic4life]

i have a d15b7 motor bone stock. i want to hopefully add a little bit of juice by making it vtec but i have no clue where to start. PLEASE HELP!!!

[FiveFreshFish]

I think a complete motor swap would be easier.

[SaabKraft]

vtec would require a whole new cam assembly (maybe even a new cylinder head) and some way to tell the cams when to engage at the point, (electronics etc), and i'm guessing the more agressive cam set up would need a modified fuel map (and maybe ignition as well) due to the altered intake and exhaust duration.

"... with its unique VTEC system. The initials stand for Variable Valve Timing and Lift Electronic Control, and as the name implies, a VTEC engine can actually alter the cam timing while the engine is running."


"the VTEC setup can alter both camshaft duration and valve lift. In its classic form as used on Honda's DOHC motors, each cam has two different sets of lobes: one used under low-speed conditions, and one that is only activated at high rpm (usually at points over 4,900 rpm). The high-speed lobe is almost a race-quality cam, with (on the popular Acura Integra B18C5 engine) 290 degrees advertised duration (about 242 degrees at 1mm [0.040-inch] lift).


As first implemented on the high-performance DOHC motors, there are three cam lobes and three rocker arms for each pair of intake and exhaust valves."

http://www.hotrod.com/techarticles/e...113_0307_vtec/

IMO it's far to integrated into the whole engine system for a simple add on, so unless you swap it out, look into a LPT system (low pressure turbo) or some higher compression pistons to add some 'go'

[atomic]

head

[civic4life]

would it be possible to swap the head to maybe a d15b vtec or a d16 head and if so would i have to change the ecu?

[Skyline_Addict]

your best bet, really, would be to go for the swap.
you might waste alot of time and money trying to mod the current engine into a vtec...

[civic4life]

would i be able to maybe just swap the head to d15b vtec or d16 and if so would i have to change the ecu??

[dieselpower91]

Start off with JDM V-Tec stickers!

[civic4life]

ok thanks what would be a cheap and easy swap?

[Horatio]

search on www.d-series.org for "mini me". You'll get more info about this swap than you know what to do with

Greg

(to give you a head start....what you're talking about is putting a D16Y8 head in place of the D16Y7 head you probably have now...find out what that means and you'll be on your way )

(oops....serves me right for not reading your question properly....didn't notice you've got a D15 not D16....sorry)

[xrayvsn]

Isn't the mini-me exactly that - a d16z6 head on a d15 bottom end? I've seen write-ups on this.

Also think I saw an ad for a mini-me motor fs here on beyond.
http://forums.beyond.ca/showthread.p...threadid=53349

[SaabKraft]

in reply to civic4life's pm, all i know is what i listed.... i don't own a honda or vtec engine so i'm giving advice based on the technical points alone... heck, i've not even DRIVEN a vtec equipped car .

that said, i still think there's better ways to get power than just installing a setup that'll slide the cams once you pass 5000 rpm.

i still think the fuel map might have to be altered, otherwise you'll be running too lean at higher RPM's... that said with the head swap comes the electronics, as i doubt vtec is mechanically controlled. so that indicates an ECU and wiring harness swap. which means alot of reconnecting and possible splicing.

it really depends on the budget.

i still think there are cheaper and less complicated ways to get more power. if you want a grocery list for a LPT system, pm me. 4-6 psi of boost could be fun, run one boost gauge to the dash, and control it with a mechanical controller ($60). give you a broader power range as turbos kick in anywhere from 2500-3200 rpm, sooner than vtec, and for longer, IMO.

that's all for now

[civic4life]

ok thanx

[KAOS41]

PM Kato at www.the-swap-shop.com

he has done this swap and has it running very well

and yes you need to change the ECU