Finally finished my Zex install! (almost)

[DCC Justin]

All I have left to do is program the window switch. I have the tach signal coming from the front driver's side coil purple wire and I know you are supposed to multiply by two. It looks like Zex doesn't make it that easy- looks like there are three settings:

(the numbers are what shows on the switch display)

"0 0 = individual coil per cylinder systems where the TACH wire is connected to the coil

0 1 = coil packs that fire in pairs (waste spark systems) and the TACH wire is connected to the coil

0 2 ~ 12 = number of engine cylinders, from 2 to 12, where the TACH wire is connected to the tach from the engine electronic controller or distributor"

Sooo.... Which setting do I use?

Thanks in advance for your help!

[vx-355]

I would guess 0 0

Reason being the coil packs dont fire in pairs and the Tach wire is not connected to the ECU. But maybe someone else can confirm?

[DCC Justin]

Thanks for your help! I tried it and the rpms on the display look correct so I assume it's working?

Another question-

If I'm only running a 75 shot is it safe to use the superchips vararam 91 tune? Would the 87 tune pull a couple degrees of tuning? Should I go all the way back to he stock tune?

[DCC Justin]

I'm eventually planning to run a bigger shot with a real tune (hopefully by Patrick G) but I want to wait until after I get lt headers/exhaust at the end of July...

[norm8332]

What wire did you end up using? I 'm planning installing an rpm switch for various goodies soon.

Oha I see it "driver's side coil purple wire" it this the one you ended up using?

[vx-355]

Yep.....is the basic RPM feed wire for pretty much everything.

[DCC Justin]

It's safe if you think sticking your dick in a hooker with herpes is safe... you'll survive but its not the safest way to do it, get it tuned for spray. Especially because nobody stays at a 75 shot, they always want more.

Huh.. I guess that's a no... The plan is to get a real tune after the headers/exhaust at the end of the month. In the mean time though, I know the stock tune is safe for a 75 shot. Can I get input specifically on whether or not you think the 87 tune has enough timing pulled for a small shot?

Thanks again for your advice.