Dual Walbro's in a 1G AWD

[95talonracer]

Good information. Is doing a 2g awd similar? Anyone have a link for a 2g setup?

[Halon]

I started researching into if there is an amerage issue with running dual pumps off the stock wiring. I believe the MPI fuse is a 20A fuse. On RRE's site they show at 73 psi, the pump is drawing 10.5 amps. Double that for 2 pumps. Now I'm wondering, does that MPI fuse directly feed the fuel pump? If so then at full boost I have a good chance of popping that fuse. But if that fuse is just for the MPI relay, and the fuel pump feed is actually coming through different leads on that relay or something, meaning that 20A fuse isn't in the direct path of the fuel pumps, then I shouldn't have a concern with that 20A fuse.

Anyone who knows a lot more about this then me care to chime in?

[iceminion]

I have seen several people do this with stock wires, no problems or blown fuese to report as of yet.

My galant and my buddies talon will outrun the single 255's we have in there pretty soon.

When we switch over to the 2x pump system, if i have any problems ill post up here.

[Halon]

You've seen several people run the dual Walbro's on the stock wiring? What kind of fuel pressure are they at at full boost?

The thing I'm worried about is in fact blowing that fuse. If I get my fuel pressure up to around 70psi and the amp draw is too much, that's really not a good time for my fuel pumps to lose power.

[A//// Guy]

The problem with the stock wiring is that it doesnt supply enough voltage when you upgrade pumps. So upgrading to two pumps would help but you are drawing even more power on the stock wiring. I think thats a bad idea.

I would upgrade to thicker wiring, add a relay and a larger fuse.

[Goat Blower]

If you remember a long time ago, people were seeing a noticeable difference in fuel flow just rewiring any single fuel pump, and that's when using a 190lph pump was an upgrade and the 255lph was considered a race car mod. Mine's been upgraded since 1997, so putting in two pumps, I didn't really need to upgrade. I definitely would if you're on stock wiring. I might even upgrade mine directly to the battery instead of the FP relay.

[Halon]

Yes I understand by rewiring, you may see an extra 2 volts or so at the fuel pump, allowing it to flow more. I did this on my old 2G 7 years back. It's a great mod if you are pushing the pump. But do you think I'm going to need those extra 2V in this case? Am I going to require more then what 2 255hp's put out at 12V? I honestly don't think so. Guys have ran SC61's pushing a single 255 to it's limits. 2 255's won't flow double, but will flow quite a bit more then a single. As of right now I really don't think I need to rewire this because I need that extra 2V for more flow. But again, what about amperage? Adding a 2nd pump just doubled the amperage the stock wiring will be seeing. That's what I'm worried about, too much amperage on the stock wires. I may just end up rewiring it because I don't want to pop a fuse and lose power to the pumps during a 30psi pull. That'd make for a real bad day :(

[Kevin 1G Drummer]

I'd say just rewire it and be safe. There's no sense in worrying about too much amperage when you alredy know how to prevent it.

[DSM_421]

Damnit kevin, you need to fix that quote in your signature...

[joesushi]

Is there an easy way of identifying a 190 vs a 255? I don't know which one i have. I can only assume running a 190 with a 255 is not on the safe side, right?