Gunreaper

Getting ready to install the sniper efi kit on my 89 camaro and the instructions are a little vague.

more help as to where to connect the wiring?


like....
is their a place under the hood to connect the +fuel pump wire?

Where to pick up +12v switched?

any other wiring info as far as connecting the sniper efi to a hyperspark distributor?

Abubaca

iTrader: (3)

For the fuel pump, I'm using an aftermarket relay that came with my racetronix kit, BUT....assuming you're using the stock fuel pump relay, you just cut the switched wire coming from the OEM wiring, into the pump relay, and wire in the lead from the new Holley ECM instead. The relay and pump never know the difference. The command to power the pump is just coming from a different source. That new lead wire is not enough to power the fuel pump, but it'll switch on the relay, which of course in turn, powers the pump.

When you ask about the 12v switched, is that for the pump, or do you mean the 12v switched while cranking lead they tell you to find? I pulled mine from under the dash, from where it originally went into the factory ECM. I think it was pink but double check.

anesthes

iTrader: (12)

Hyperspark ?

I've been wanting to play with a sniper for a while. Almost put one on one of my boats last year, but the USCG regulations are a little fuzzy.

I'd probably use a delco dizzy though. Just wire the pickup direct to the sniper so it can control advance.

-- Joe

Gunreaper

The holley sniper efi kit say +12v and - directly to battery. Then switched +12v. I was going to use the switched +12v for my coil but it says in instruction not to use coil switched 12v.

Street Lethal

iTrader: (16)

I'll give that famous and lovable youtube Klown a plug lol.

Good info in his video about the Sniper wiring..

- Rob

scooter

iTrader: (11)

They just don't want you to use the resistive wire that went to the coil in the old cars. Newer vehicles with HEI had full voltage to the coil, so it shouldn't be an issue. I got all that from the Holley manual

Tibo

iTrader: (15)

I know some really knowledgeable people have debated whether or not you should ground directly to the battery as opposed to the engine. Their thoughts are usually to ensure that the ecm is always seeing the proper voltage and wiring directly from the battery can negate voltage drop via wiring. Unfortunately if you don't fully understand automotive grounding and electronics you can introduce more problems and might not know it. You can run into problems with sensors having different voltages than the ecm shows which could be negligible at best and cause a no start at worse. There's also the problem of if you had inadequate grounds and the system tried to ground itself through the ecm when the starter or other high amperage device gets used. If you were deadset on grounding to the battery directly then I'd probably install a fuse on the negative side and ensure that the case was not touching anything metal, IE. No way it could allow an accidental ground path.