Did A Bit Of Tuning Yesterday
11-02-2003, 01:29 AM
#11
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Join Date: May 2002
Location: Okinawa, Japan
Posts: 4,928
Originally Posted by IGY' date='Nov 2 2003, 12:14 PM
Not if he is already having pump problems. That would just make the pump flow less.
DuMaurier7, something's sounds wrong with your pump/pump wiring. I'm using 2 FD pumps at 45 psi static fuel pressure and it hold thru 9000 rpms/15 psi boost. What gauge wire are you using for your pumps? Are you sure your getting the right voltage to them?
11-02-2003, 09:04 AM
#12
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Thread Starter
Join Date: Mar 2003
Posts: 410
I am using 8 gauge amp. wire from the battery streight to the pump , my battery is at the back so the distance is short , the ground wire is also connected at the batterys grounding point in the hatch and is switched via the HALTECHS pump control system which I wired to switch an additional relay. I found that the supply voltage from the HALTECHS's system (the orange coloured wires) wasnt capable of supplying enough power when the battery is placed at the back , although I used 0 gauge oxygen free audio wire (expensive stuff) to connect the battery to the +ve connection point up front , before switching around the voltage supply , the fuel pressure would keep falling off at as little as 10 psi boost.
11-02-2003, 07:08 PM
#16
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Join Date: Dec 2001
Location: Okinawa Japan at McDonalds
Posts: 472
Originally Posted by DuMaurier 7' date='Nov 2 2003, 08:28 AM
I am using the AEROMOTIVE A1000 pump and a PAXTON 1:1 FPR , my static fuel pressure is 37psi . As boost builds , so does the fuel pressure , until a max of a little more than 50 (its supposed to go to 52psi with 15 psi boost) , then it starts to fall off to about 45psi as I go up in the rpm's.
11-04-2003, 10:10 AM
#19
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Thread Starter
Join Date: Mar 2003
Posts: 410
Not it isn't lower , but it is in line with the suction point which is at the rear of a sump that I had attached to the underside of the tank. I have the pump mounted on to the black, metal piece of sub-frame that goes between th tank and the Diff , I bolted the pump on to a flat rectangular piece of aluminum , then mounted that on to the sub-frame.
11-06-2003, 08:41 PM
#20
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Join Date: Feb 2002
Posts: 94
I am running 50 PSI base with this pump and My pressure holds all the way to redline, but at 24 PSI I checked the peak injector duty and it was about 98%. The 24 was insane compared to the 18 PSI I normally ran. I wanted to try 25 but wont even think of it untill I get some room on the injector duty.
I am using 10 AN to the pump and 8 AN feeds to each rail. My pump is lower then the sump. I wonder if some crud did not get cought in the filters? What filters are You using (micron size)? I used teflon steel braided lines and the fittings are a bit restrictive so I am changing to rubber stainless lines and Earls fittings as the bends flow better. I am not sure if it will help but I am going to change them out.
I am using 10 AN to the pump and 8 AN feeds to each rail. My pump is lower then the sump. I wonder if some crud did not get cought in the filters? What filters are You using (micron size)? I used teflon steel braided lines and the fittings are a bit restrictive so I am changing to rubber stainless lines and Earls fittings as the bends flow better. I am not sure if it will help but I am going to change them out.