*Boostwerks*

I would like to add a relay to the system that has a seperate positive wire sent too the stock location (in parallel) at the pump. This would allow the system to increase the voltage while retaining the stock wiring. Would that setup be fine?

Also, what relay should I use?
And, I would just have a 12v switched source power the relay correct?

Thanks for any info!
Bryson

lodo1

just go to any car audio store and pick up a single pole double throw relay and wire that up.

dustin

Is this really going to increase the voltage? Is this just for like a walbro?

dnbruut

for a stock or other small pump its useless cause loosing power in the cables and relais depends on how big the current is through the pump. in a 80 ampere sound system it does make a difference

TrueNorthStar

I havent looked over the electrical drawings for my car yet but I do know that I read 12.02 volts @ the pump while I'm getting 14.3 volts at my battery. I would assume that the stock fuel pump is getting its power regulated power source...

From the pump dynos I have seen on walbro pumps, you can get 10gph more fuel @ 70psi from going from 12v to 13.5v 10gph is the differance between running a walbro intank @ 12v vs. running a A1000 at 12v minus 2 gph....


Bryson, just use the stock fuel pump power (wires) and use them to actuate the relay. Have the relay act as a disconnect to upgraded wires that you run (fused) to the pump from the battery.

VTC_CiViC

I remember Jeff Evans talking about this on boosted-hybrid.com, I don't know about a power increase per-se, but it does eliminate varying voltage going to the pump to keep it operating at the same output.. I belive his method was to eliminate or bypass the OEM wiring altogether though..

*Boostwerks*

Thanks for the input guys...

I know that Geoff has mentioned something about this in the past. I think courtney green was using something like this to be able to support 680hp from just a walbro 255lph.

Maybe I'll PM him.

Kwuaymaikrup

I will be doing this soon. I am going to use the fuel pump trigger from the ecu to fire the inline relay. The pump will be wired directly to the battery with the ralay inline. This should assure maximum power to my very voltage sensitive A1000.

*Boostwerks*

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kwuaymaikrup &raquo;</TD></TR><TR><TD CLASS="quote">I will be doing this soon. I am going to use the fuel pump trigger from the ecu to fire the inline relay. The pump will be wired directly to the battery with the ralay inline. This should assure maximum power to my very voltage sensitive A1000.</TD></TR></TABLE>

Hrmm...that sounds like a good idea. Are you going to completely do away with the stock pump wiring?

I'm really wondering If I should just keep the stock wiring and add another relay/wire or just completely remove the stock wiring?

Kwuaymaikrup

I will probrably mount the relay close to the ecu and run a wire straight from the harness plug to the relay. I will however eliminate the wiring that plugs to the stock pump location.

As long as you are using the stock pump wiring to activate the relay only it should be fine. Just make sure you run a completely seperate wire for the power to the pump.