fuel pressure
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TECH Senior Member
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Joined: Aug 2012
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From: Howell & Fenton MI
Thanks guys! Well I have 42 lb injectors, so no problems there. Let me ask you guys this: Tomorrow I plan on doing a voltage test to see if I get any drop at any point. If I do not get a drop in voltage (it was good at 13.5 last time with the old pump) then my hotwire kit is doing its job right? No need to put the Racetronix one on right? Or am I wrong here? Also I was told by Walbro anything more than a 2-3 psi drop is not supposed to happen. Now that doesn't mean a 6-8 psi drop is going to be bad or hurt something, it's just no ideal or correct according to them
Like others have posted, you should get 58psi at all times unless using a boost referenced regulator. The 255 with proper wiring is a good choice. if you can, over do the wiring. I used 10ga for the pump. I did NOT use any stock connectors and crimped/soldered everything. Bulkhead connectors can be made with nylon bushings and washers.
My Aeromotive 340 pulls about 13.5A at idle. It has gotten up to 16A at WOT. My old supra pump fried 14ga wiring...
My Aeromotive 340 pulls about 13.5A at idle. It has gotten up to 16A at WOT. My old supra pump fried 14ga wiring...
Thread Starter
TECH Senior Member
iTrader: (2)
Joined: Aug 2012
Posts: 11,137
Likes: 20
From: Howell & Fenton MI
Like others have posted, you should get 58psi at all times unless using a boost referenced regulator. The 255 with proper wiring is a good choice. if you can, over do the wiring. I used 10ga for the pump. I did NOT use any stock connectors and crimped/soldered everything. Bulkhead connectors can be made with nylon bushings and washers.
My Aeromotive 340 pulls about 13.5A at idle. It has gotten up to 16A at WOT. My old supra pump fried 14ga wiring...
My Aeromotive 340 pulls about 13.5A at idle. It has gotten up to 16A at WOT. My old supra pump fried 14ga wiring...
Voltage drop is from the wires inabilty to provide enough current. You are limited to a specific wattage. Find out what the ga of your hotwire kit is. If its 14 replace it. 12 should be okay. 10 is ideal. Keep in mind the entire system providing power to the pump is only as strong as its smallest gauge or weakest connection.
