12v question - Holley Sniper 2300

[Guypatterson]

I've got my new Holley Sniper 2300 99% installed on my 89 GW, and I can't find any wire to use for the 12v power. The only wire that would otherwise work goes to the ignition coil, and the installation instructions say "DO NOT connect to a 'DIRTY' source like an ignition coil!"

I'm mulling over either 1) using a physical switch, or 2) putting a 4-pin relay in the ignition coil wire that will pull power directly from the battery when the ignition coil wire is energized.

Questions: is either of these options a good idea? Has anyone else encountered this? If so, what did you do?

[asphaltrockdweller]

What about using the choke wire?

[mattmopar440]

put in a relay with a fuse which would be the best thing to do with an investment of that cost power the coil side of the relay off the electric choke wire that should be hot key on

[mattmopar440]

What about using the choke wire?

yea beat me too it

[Guypatterson]

What about using the choke wire?

The choke wire was what I had hoped to use, but it's not hot while cranking. The only wire that is hot while cranking AND while running is the wire to the ignition coil.

[mattmopar440]

The choke wire was what I had hoped to use, but it's not hot while cranking. The only wire that is hot while cranking AND while running is the wire to the ignition coil.

disconnect the ign coil wire hook it to 2 relays one will power the ign coil the other the EFI both will have separate fused power from the battery

[babywag]

Use the stock duraspark power wire to trigger a relay.
2 wire connector, one wire is hot in both crank & run positions.

There is also a wire on the starter relay, that is same.

Do not use the coil wire.

[Texas993]

There is a much simpler solution. The yellow wire that goes into the ignition module works. You can tap into it (do a quality tap) or cut the wire if you no longer need the module (which is what I did).

I have used this source for both a Holley Sniper and the Howell TBI setup.

(For those that don't think this is enough power, the Holley Sniper has a separate wire directly connected to the battery).

BTW, I am in Dallas if you need some help.

[Guypatterson]

There is a much simpler solution. The yellow wire that goes into the ignition module works. You can tap into it (do a quality tap) or cut the wire if you no longer need the module (which is what I did).

I have used this source for both a Holley Sniper and the Howell TBI setup.

(For those that don't think this is enough power, the Holley Sniper has a separate wire directly connected to the battery).

BTW, I am in Dallas if you need some help.

Thanks for the suggestion. I am going to try this tonight; I will let you all know how it works out.

[Guypatterson]

To update everyone and to give an initial review of the system. For 12v power, I used the yellow wire that goes into the ignition module, and everything seems to be working great.

Performance has been AWESOME so far. The engine idles so smoothly...it sounds like a different car. Throttle response is great. My mpg has increased about 15-20% (from 8 mpg to 9.5-10 mpg).

Overall: I am thrilled with the product, especially since it only cost around $1200.

I only have one con: the priming time. Before starting, you have to turn the key to on and then wait 2 seconds for the pump to prime. This is slightly annoying, but not that big of a deal.

[babywag]

I'm guessing that's CITY mpg you're referring to?
That is one area EFI shines on these old pigs, if you're talking HWY then you need to do some tuning

[Guypatterson]

I'm guessing that's CITY mpg you're referring to?
That is one area EFI shines on these old pigs, if you're talking HWY then you need to do some tuning

Yes. That's city mpg. My ride doesn't get on the highway much. It goes to/from my office each day, which is only about a one mile trip.

[babywag]

Yes. That's city mpg. My ride doesn't get on the highway much. It goes to/from my office each day, which is only about a one mile trip.

Well I can say after YEARS of mileage tracking that EFI saved me ~$500/yr in fuel. 90% of my driving is City, and it adds up.
Some folks always spout off about lack of return on investment, and $xxx buys a crapload of fuel, etc.
But the math is simple, the EFI has paid for itself several times over, and soooo much better than a carb.

[Guypatterson]

As a side note, I am thinking about putting in a Holley Dual Synch Distributor. Currently, my Sniper does not control timing.

What are some of the practical benefits to controlling timing? Will I get better mpg? I've heard the idle may be smoother?

[babywag]

I wasn?t aware holley makes one for AMC??

Allowing timing control takes full advantage of EFI.
The computer can adjust based on sensor inputs.
Allows for fine tuning that a traditional setup just cannot do.
You can also tweak/tune from drivers seat w/o even opening the hood.