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Old 08-28-2007, 10:23 AM
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smaller fuel pump body needed

Hello everyone, oes anyone know of a smallblock Chevy fuel pump that is smaller than 4.1 inches,measured from the back of the bolt up flange to the outer edge of the case.Under my 48 Chevy coupe is an S10 frame with the front crossmember modified to fit the Chevy fuel pump on one side of the 350 and the power steering pump on the other.The chassis is basically finished except I have concerns about breaking the fuel pump off when I start the engine because the pump is scraping the frame.The local performance shop wants me to install an electric fuel pump and regulator which is the last resort for me because of cost,noise and the time to plumb all that into the fuel system.The gas tank has an electric fuel pump in it but it has been suggested that if I run that without a return line the pump could burn out at any time.The engine that I am running is a 1985 Chevy 350.

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Old 08-28-2007, 12:21 PM
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Why not just notch the frame enough to prevent the pump from contacting the frame? If your worried the notch may cause a weak structure issue, you could always add a steel brace to the outside the frame of where the notch is just have the plate welded into place. I doubt lightly notching the frame would hurt it any. This is likely your cheapest resort, a few minutes with a die grinder and carbide cutter would do the trick.
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Old 08-28-2007, 12:36 PM
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I have the frame notched right out to the springs and if the springs rub against the steel I will have some squeaks to deal with once its ready for a test drive.
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Old 08-28-2007, 12:45 PM
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If the motor is 400Bhp or less a Carter #4594 electric pump is cheap, quiet when correctly rubber mounted and very reliable. Needs no regulator. Also can be easily sourced should it happen to crap out one day. if you run a in line fuel filter on the inlet, the thing will most liley outlive the car and you.
No vapour lock either. Probabily your best overall solution.
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Old 08-28-2007, 12:55 PM
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I used that same carter pump, 30 minutes, removed it and sold it. Fuel pressure was 9 psi so it had to have a regulator but that didn`t bother me any, but I learned the advertised fuel pressure wasn`t accurate but many others had told me the same thing before I purchased it and they were right so I was prepared. I used 2 isolated rubber mounting points and could still hear it so it had to go. But I certainly agree it`s likely the easiest route.
Where the concern is on the spring rubbing the frame, that`s what rubberized undercoating is for that you can buy in almost any parts store or wal mart.
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Old 08-28-2007, 12:59 PM
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I just found this, expensive, but is likely the answer to the problem.
http://www.raceglass.com/item.cfm?itemid=42177
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Old 08-28-2007, 01:15 PM
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DoubleVision, that new pump you posted is cool! Pricey though!

Hey mikee, the carter one can be had from Summit for about $72, but I found em on fleebay for $50:

http://cgi.ebay.com/ebaymotors/ELECT...QQcmdZViewItem
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Old 08-28-2007, 01:17 PM
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The motor is basically a stock 350 Chevy 4 bolt mains,aluminum intake and headers.The performance shop pointed out that new style fuel pump but price and the fact that it could probably pump enough gas to start my own gas station put it out of contention for me.
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Old 08-28-2007, 01:23 PM
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I'm in the same boat mike, cept mine is still an S-10 all around.

The mechanical doesn't want to fit on mine either. What's weird is I used to own an '82 with a 350 as well and it used a mechanical, and fit fine. I'm now wondering if the frame was notched and I just hadn't noticed. I'm either gonna go with a Holley "blue" or "red", or the Carter that's been posted.

Good luck dude, let us know what you come up with.
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Old 08-28-2007, 03:51 PM
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The advertised static pressure of the Carter P4594 is 6 to 8psi. No regulator is nessessary even with a Edelbrock carb. Of the many I have installed and actually flow tested the actual static pressure was always 7psi @ 12.5 volts. I presently own 2 of them. If you mount it simular to how you hang an exhaust pipe the vibration of the pump will not be transfered to the body. If you mount it wrong like screwing it to the trunk floor even with a rubber isolator, it will be noisey cause the trunk floor will vibrate and amplify the sound.
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