Holley Sniper on Tucker

[vintagebike]

Any thoughts on putting a Holley single or 2 barrel Sniper system on a Dodge 25" flathead using the stock head , intake and exhaust manifold? And a plan to keep a spare onboard.

 

[warwagon41]

Theres a guy here that runs that setup I believe.
I think Mctucker is familiar with it , hopefully he will chime in.

 

[Mctucker]

Any thoughts on putting a Holley single or 2 barrel Sniper system on a Dodge 25" flathead using the stock head , intake and exhaust manifold? And a plan to keep a spare onboard.

I have a friend that did it to his Flathead in his tucker. Runs really well. A few things he had to tweak, but hasn’t had an issue sense. He runs at a lot of varying altitude.

 

[vintagebike]

and the tweeks were...

 

[Mctucker]

and the tweeks were...

I don't recall off the top of my head. I’ll reach out to him and get back to you.

 

[WyoWild]

I have the Holley systems for my two (2) Tuckers, but have not installed them. I'm interested in getting some information here. One is the 316 engine and the other the 360.

 

[YamaDooPolCat]

I run the Holley sniper on my 1975 Tucker with the 318. It starts good in all sorts of weather and has been trouble free. Tweaks were running a return fuel line and the ensuing rust and garbage plugging filters. Took a while for the fuel tank to clean up. I would also recommend you go to the GM three wire alternator as a faulty ground on the Dodge system will fire any electronics. Cost me lots. Luckily the Sniper was isolated by a 4 prong relay.

 

[WyoWild]

I run the Holley sniper on my 1975 Tucker with the 318. It starts good in all sorts of weather and has been trouble free. Tweaks were running a return fuel line and the ensuing rust and garbage plugging filters. Took a while for the fuel tank to clean up. I would also recommend you go to the GM three wire alternator as a faulty ground on the Dodge system will fire any electronics. Cost me lots. Luckily the Sniper was isolated by a 4 prong relay. View attachment 195926View attachment 195927View attachment 195928View attachment 195929View attachment 195930View attachment 195931View attachment 195932View attachment 195933View attachment 195934View attachment 195935View attachment 195936


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Hell yeah! And thanks for the pics. I've never done a GM 3 wire conversion, but if there is a risk of burning up the VERY expensive Holley system, it would sure be worth it. My 74 is the crewcab, but everything under that hood looks identical.

 

[vintagebike]

Did you send the return fuel back to the tank in regular braided rubber line or high pressure? Plus, are your LED headlights heated?

 

[WyoWild]

@YamaDooPolCat where did you end up putting your O2 sensor?

 

[YamaDooPolCat]

Did you send the return fuel back to the tank in regular braided rubber line or high pressure? Plus, are your LED headlights heated?

The return fuel from the Holley is just regular gas line as it is free flow back to the tank.
The LED lights on the hood were not great as they would ice over. I went back to the old style round incandescent lights. Time will tell if they are much better.

Sometimes we get quite a bit of snow, and I find the LED lights on the cab are the best light.

 

[YamaDooPolCat]

@YamaDooPolCat where did you end up putting your O2 sensor?

I found a spot just after the Y pipe to weld in the nipple. The O2 angle has to be above the "horizon" so that the sensor doesn't sit in water in the off season. I also wrapped the pipe as the exhaust gets real hot doing what we do.

 

[YamaDooPolCat]

One of the other "tweaks" I had to learn by accident is to remove the wires in the Holley harness that you do not use. There was a braided pair that I left loose and they picked up enough induced voltage to drive the Sniper software nuts and it would hunt constantly to find the correct fuel mixture and idle rpm, and sometimes just quit. Big tweak!