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  #1  
Old 01-19-2018, 10:46 PM
Guypatterson Guypatterson is offline
230 Tornado
 
Join Date: May 29, 2015
Location: Texas
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12v question - Holley Sniper 2300

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?
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  #2  
Old 01-20-2018, 12:41 AM
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asphaltrockdweller asphaltrockdweller is offline
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What about using the choke wire?
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  #3  
Old 01-20-2018, 12:42 AM
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mattmopar440 mattmopar440 is offline
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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
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Originally Posted by Heavy_Metal_Thunder_81
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  #4  
Old 01-20-2018, 12:43 AM
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mattmopar440 mattmopar440 is offline
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Quote:
Originally Posted by asphaltrockdweller
What about using the choke wire?

yea beat me too it
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91' Grand Wagoneer
401/727/229, Currently:Down for Body Work
77' Wagoneer 401 Parts rig
80's J10 258/T-5/208
89' Jeep GrandWagoneer
New Project
74' J10 Go Grabber Green Running
Quote:
Originally Posted by Heavy_Metal_Thunder_81
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  #5  
Old 01-20-2018, 01:03 AM
Guypatterson Guypatterson is offline
230 Tornado
 
Join Date: May 29, 2015
Location: Texas
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Quote:
Originally Posted by asphaltrockdweller
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.
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  #6  
Old 01-20-2018, 03:02 AM
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mattmopar440 mattmopar440 is offline
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Quote:
Originally Posted by Guypatterson
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
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91' Grand Wagoneer
401/727/229, Currently:Down for Body Work
77' Wagoneer 401 Parts rig
80's J10 258/T-5/208
89' Jeep GrandWagoneer
New Project
74' J10 Go Grabber Green Running
Quote:
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Inferior Chevy


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  #7  
Old 01-20-2018, 10:12 AM
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babywag babywag is offline
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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.
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
1994 Caprice wagon
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  #8  
Old 01-20-2018, 05:12 PM
Texas993 Texas993 is offline
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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.
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  #9  
Old 01-22-2018, 04:29 PM
Guypatterson Guypatterson is offline
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Quote:
Originally Posted by 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.


Thanks for the suggestion. I am going to try this tonight; I will let you all know how it works out.
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  #10  
Old 04-04-2018, 09:22 AM
Guypatterson Guypatterson is offline
230 Tornado
 
Join Date: May 29, 2015
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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.
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  #11  
Old 04-04-2018, 09:31 AM
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babywag babywag is offline
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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
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
1994 Caprice wagon
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  #12  
Old 04-05-2018, 08:30 AM
Guypatterson Guypatterson is offline
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Quote:
Originally Posted by 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


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.
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  #13  
Old 04-05-2018, 10:21 AM
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babywag babywag is offline
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Quote:
Originally Posted by Guypatterson
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.
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
1994 Caprice wagon
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  #14  
Old 04-09-2018, 09:19 AM
Guypatterson Guypatterson is offline
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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?
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  #15  
Old 04-09-2018, 09:33 AM
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babywag babywag is offline
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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.
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
1994 Caprice wagon
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  #16  
Old 04-09-2018, 09:44 AM
Guypatterson Guypatterson is offline
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Quote:
Originally Posted by 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.


Would this one fit?

I know about being able to adjust & tune, but what are the end benefits of doing so? What are the actual effects on daily driving?
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  #17  
Old 04-09-2018, 10:50 AM
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babywag babywag is offline
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Quote:
Originally Posted by Guypatterson
Would this one fit?

I know about being able to adjust & tune, but what are the end benefits of doing so? What are the actual effects on daily driving?

That one will NOT fit, just like any other engine part that isn't AMC.

Far as benefits? The standard setup is a fixed setup with only vacuum advance based on engine load, and centrifugal mechanical advance.

Utilizing timing control allows precise adjustments based off multiple sensors.
The computer can optimize/adjust almost instantaneously.
For example you can add a little advance for hwy cruising, and combined with AFR/fuel adjustments tweak it for better MPG.
You can setup the timing curve to replicate a ported vacuum type setup, or a manifold vacuum type setup.

A standard setup obliviously doesn't change based off real time engine/driving conditions. It is what it is, and while it works just fine if setup correctly, it is a compromise. Just like a carburetor.
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
1994 Caprice wagon
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  #18  
Old 04-10-2018, 12:34 PM
Guypatterson Guypatterson is offline
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Quote:
Originally Posted by babywag
That one will NOT fit, just like any other engine part that isn't AMC.

I contacted Holley. They said it works. Below is the text of the email I received

Quote:
"Hello [Guypatterson],

Thanks for contacting Holley Tech Service. After doing some digging, I feel confident saying that yes, the 565-108 will work on your engine.

Regards,
Jason G"
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  #19  
Old 04-10-2018, 04:18 PM
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babywag babywag is offline
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Quote:
Originally Posted by Guypatterson
I contacted Holley. They said it works. Below is the text of the email I received

Well if you had a Chrysler 360 yeah it would, but it WILL NOT work for an AMC.
But by all means what's $465 for a doorstopper you can proudly chock your wheels with a smile.
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
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  #20  
Old 04-12-2018, 09:48 AM
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kansasboy001 kansasboy001 is offline
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Quote:
Originally Posted by Guypatterson
I contacted Holley. They said it works. Below is the text of the email I received
Good luck even getting that in the dist hole. If it did fit it would tear up your cam gear or worse. That's for a Chrysler 360. You have an amc 360. Not the same engine at all
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