another walbro / hotwire kit question...

[oleshifty]

Looking at racetronix website.

Which hotwire kit are you guys using (partnumber?) I want to make sure it has the right connection for my sending unit. Would prefer the kit to be long enough to reach from alt/pump. If I have to extend wires, I'm better off making my own. For the $48 bucks some of the kits are going for, if it works, I'll just buy one.

Which walbro pump? I'm not sure the difference between GS 340, GS 340M, GS 341, GS 342

[RedHeartbeat]

I buy the universal kit just to get all the wiring and the waterproof relay. As for pump, no idea. I bought the one for the newer Buick GN last time I did one on my 93 truck.

[oleshifty]

alright, that's kind of what I figured. Wasn't sure if one of the vette kits had the same plug or not.


Have you tried to rewire one of the factory connectors so that the larger wire goes all the way to the pump? Or do you just cut/solder an inch or so away from the connector?


I was originally going to tap off the factory fuel pump relay in the fusebox (as a switch) and mount the extra relay under the hood, then just run the power wire from the alternator to the walbro....

seems like this kit mounts the relay near the back of the truck. Guess it doesn't really matter.

[RedHeartbeat]

I mount the relay close to the fuel tank. Racetronix sells a HD four wire bulkhead fitting you can install with larger size wire going to the fuel pump. I think it was for a Corvette originally. I don't worry about the original connectors, I just splice into the wires, solder and shrink fit tubing to seal out the elements.

[oleshifty]

do you have any pics? I just looked through your garage. Didn't see any. I was referring to getting the 10gauge power wire inside the tank to the pump. The sending unit has the plastic connector built into it. I was going to replace the wires INSIDE the tank with 10 or 12 gauge. Wasn't sure how to get the racetronix kit to hook up to the factory sending unit. Or do you just drill a hole in the top of the sending unit, and seal it afterwards?

[RedHeartbeat]

10 gauge is quite large for a walbro pump. Even a Bosch 044 only draws about 16 amps. The stock wiring works good. The updated 4 lead as mentioned before will work a little better. I can't imagine a need for 10 gauge lead inside the tank unless you're going to use it to power two pumps at once. There may be some photos of the racetronix harness when we installed on on DamnYankee's truck a while back.

[oleshifty]

the racetronix kit is 10 gauge.... just figured i'd run that all the way to the pump.


So guessing the benefit of pump is tying off alternator vs size of wire. I was thinking the size of the wire was the restriction

[MidwestSS]

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[oleshifty]

Pull your bed off....use a voltmeter...check voltage at fuel pump. If it's less then 13.9, hot wire kit helps. Specially if you're trying to run a big stroker motor with spray...



Is it needed? NO. Either is a walbro. Just run a stock pump. If I'm going through the hassle of moving the bed, pulling apart my sending unit...I'm going to do it right.

[pl4yboy]

Hotwire kit is not required. Its not a bad idea... but it isn't required. For what you're doing Mikey, a hotwire kit wouldn't be a bad idea with the procharger. I don't think you'd have any issue whatsoever with the stock wiring on a plain old 408. But with the procharger, it's a good idea.

Wire size is the restriction. The upgraded wiring only allows the pump to receive more voltage. More voltage = pump can work a little harder. It is not however going to start a fire like some people think...