Guest Anonymous Posted January 14, 2002 Share Posted January 14, 2002 what fuel pump are all you carbed guys/gals using? is it possible to use stock with a fuel pressure regulator? Quote Link to comment Share on other sites More sharing options...
biohzrd Posted January 14, 2002 Share Posted January 14, 2002 holley blue with regulator. seems to work pretty good for my motor. had the red aand it could not get enough fuel to the carb at full throttle. Quote Link to comment Share on other sites More sharing options...
Guest kc6wfs Posted January 15, 2002 Share Posted January 15, 2002 I'm using a holley 5 lp in the rear with nothing else. I don't notice it going lean on WOT. Should check it some day. Dave Quote Link to comment Share on other sites More sharing options...
blueovalz Posted January 15, 2002 Share Posted January 15, 2002 Was using the blue Holley electric with regulator, but it's NOISY!!. Changed it to a Carter electric, and it's much quieter now. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted January 15, 2002 Share Posted January 15, 2002 Using Carter electric max 15psi. May switch to a high volume mechanical when the buzz starts to get to me. Jon Quote Link to comment Share on other sites More sharing options...
DavyZ Posted January 15, 2002 Share Posted January 15, 2002 I spoke with Mike D. yesterday, and he hates the noise his Holley Blue pump makes so much he wants to give it to me!! lol He tells me the rotary vane-type units are much quieter. Davy Quote Link to comment Share on other sites More sharing options...
Guest Rick Johnson Posted January 15, 2002 Share Posted January 15, 2002 Regarding fuel pump noise. The pumps need to be isolated from the body. McMaster Car sells rubber isolators you can use to mount the pump. Basically the softer the mounting is, the less noise/vibration will be transmitted to the car. I wil be in El Segundo on Sunday if you want to see how simple it could be mounted. Regarding pressure, I think the best is to run a rear pump set at 10 PSI or more (I needed 12) and then regulate it in the engine compartment to about 6 PSI. During accelleration of a bit over 1/2 G, the head loss in the fuel line is about 2 PSI. Combine that with the pumping losses of fluid in a long tube, especially if you use the 5/16 line, and you can easily end up with a significant drop in pressure. Originally my rear pump was set to 7 PSI, regulator to 6 PSI, and pressure at the carb would drop below 2 PSI during WOT and I would loose power. I increased my rear setting to 10 PSI and the pressure at the carb would maintain 4PSI and run perfectly at WOT(confirmed with an expensive air / fuel ratio meter. I decided to set the rear pressure at 12 PSI for additional safety margin. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted January 16, 2002 Share Posted January 16, 2002 okay, let me rephrase this...can i use the stock pump? i know it is not great, but with a regulator, will it work? thanks Quote Link to comment Share on other sites More sharing options...
Tim240z Posted January 16, 2002 Share Posted January 16, 2002 quote McMaster Car sells rubber isolators you can use to mount the pump. Rick, I agree with this. I just picked up two of these from the local parts shop. They are exhaust isolators from a mercedes...rubber pad with a stud on each end. Tim Quote Link to comment Share on other sites More sharing options...
DavyZ Posted January 18, 2002 Share Posted January 18, 2002 JTR says no; that it will burn itself out. Davy Quote Link to comment Share on other sites More sharing options...
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