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Thread: SBC HEI voltage

  1. #11
    Exceeded sell by date Plumpcars's Avatar
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    I think your first job is to establish just what fuel pump you have!

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    Off the Xmas card list kapri's Avatar
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    Agree with Steve, does rather seem that the fuel is leaking in all the time as your oil level increased = too high pressure.

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    Official RnS Addict chris's Avatar
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    irrc it was a red top facet pump

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    Exceeded sell by date Plumpcars's Avatar
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    Red top is a decent pump but can pump up to 8psi. I would think it highly likely that it's blowing an Edelbrock needle valve open. I would run the regulator with that set up and wind it down to 5psi on the gauge. One thing to bear in mind if you use the small liquid filled gauge....The reading drops as the engine warms up! Set it up cold and you should be fine. If you use an Edelbrock carb you can run a slightly higher cfm than the Holley so I think the 600 will be fine.
    One other check. Are you using the original fuel tank? Plenty of filtration, preferably two stage? If it's pulling dirt up to the needle valve then you will get constant problems.It's surprising on a street car how little fuel volume is needed under normal circumstances. I run twin Edelbrocks on my coupe and have accidently left the pump off a few times. It's quite some way before the thing splutters!
    Last edited by Plumpcars; 18-01-2010 at 18:02. Reason: Wording

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    Compulsive chicken choker English Impala's Avatar
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    Quote Originally Posted by 32chris View Post
    irrc it was a red top facet pump

    Thanks Chris, TBH I never looked at it, I just installed it! Running two filters, one before the pump & one in the engine bay, I'll fit the pressure regulator, change the oil & plugs & report back.

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    Exceeded sell by date Plumpcars's Avatar
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    Bear in mind about the fuel pressure gauge Gary. Many give a lower reading as they warm up so it's possible to adjust the pressure up too high on the regulator and get a flooding situation. Adjust it cold and see what happens. At this stage you can run a really low pressure to get the car basically right and then creep up on the adjustment as it becomes driveable.

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