I'm about to do my mini-me swap this weekend and need a way to activate VTEC. I was wondering if I can use my autometer tach w/shift light to activate VTEC. Just hook up the vtec solenoid to the shift light output on the tach, so instead of my shift light coming on at aset RPM, vtec will activate. Will this work?

 

not enough power in the shift light circuit to control a relay.

ZYDNE is your answer.

 

I use a Autometer shift light MODULE to activate my VTEC via a relay. Any shift mechanism that activates a globe (not a LED) will have enough to activate a relay.
I even stuck with the standard 3000 "pill" that came with it and just set the module to 6 cyl = 4500 rpm.

 

what about the extra fuel you will need so you dont blow up your engine by being lean. get a vafc of convert to obd-1


Andy

 

yeah but dont use that metod u might fry ur solenoid
use it via a relay like someone said it will be safer....

 

Mixtures are perfect...I was worried too....

 

this setup will only be temporary until I get Zdyne. I'm going to be running a B&M adjustable FPR, B&M fuel pressure gauge, and monitor the mix with an autometer a/f gauge. Timing will be adjusted by an AEM cam gear. Can u believe I got all this stuff brand new for free? lol

 

BTW what size relay should I use?

 

30 amp

 

A typical BOSCH style 4 or 5 pin relay should work.

Just use the "normally open" contacts.

In other words, dont use pin # 87a.


I agree with others though........Zdyne or V-afc to increase fuel when VTEC activates.

 

So I disconnect the shift light, connect the tach to the relay, and then the relay to the vtec solenoid?

 

better to get an msd rpm activated switch. $50

 

I'd rather save the $50 for Zdyne. I have the tach already though

 

I picked up a used VAFC

 

90 hf ls motor 81.5 endyne mid domes
intake,hedder
75 zex 11.71 108mph
7.67 94mph
ever heard if an a-1 cable transmission

pass was ran on 20/8/14 slicks

 

why does everyone say that youll "lean" out when vtec activates??

who started this bad rumor?

 

Because when VTEC activates it opens another intake valve (in SOHC VTEC case) thus giving the motor MORE AIR. If the motor is getting MORE AIR but still the same amount of fuel then it is running LEAN

 

the fuel maps of a pm6 and p28 are almost identical

the main differnce is in the timing

right after slapping my mini me together with a pm6 ecu on the dyno w/ wideband my car ran rich off the chart on the top end ...the bottom end was actually running leaner, Then as the rpms climbed past 4500 it was rich then by 6000 i was off the A/F chart

 

lol Riiight. "yo kid, I gots that 16 valve with xtra vtec valve for trill. Runnin on strait 17 valves all da time. ya herd."

 

Definately stick with an actual VTEC controller and not just a switch. Evetually you will burn out your solinoid with just the switch.
As for running lean, yes and no. Yes you use more air/fuel when VTEC kicks in but with a mini-me you are already running rich in most cases.