LS1 Fuel pump swap into 2nd gen tank

Discussion in 'High Tech Retrofits' started by anesthes, Nov 23, 2011.

  1. anesthes

    anesthes Veteran Member Lifetime Gold Member

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    No, I'll spend some time on that tomorrow or tonight after I fill my belly with some turkey.

    I don't suspect there will be an issue, and if there is I'll just add another layer of foam over the two isolation strips.

    -- Joe
     
  2. anesthes

    anesthes Veteran Member Lifetime Gold Member

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    No problem. You will see once you start working on it.

    As far as fuel pressure, there is a table in the $8D masks (90-92 fbody) that adjusts ve based on baro. It adds more fuel under vac (around 65kpa) and slowly tapers off until 100kpa (WOT).

    So this fuel table is the inverse of what the fuel pressure regulator does. My theory is that if the table were set to be the same in each cell, it would not compensate for the varied fuel pressure.

    -- Joe
     
  3. reedld

    reedld Veteran Member

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    Joe, nice explainaton.. Good to know ahead of time that the new pump will NOT fit in the vent area. I was planning on doing it that way. I'll cut a large rectangle out, put the vette works ring in and then attach the new metal to the tank. I'm curious to know how it will fit when the tank is raised up.

    I want to keep my existing tank unchanged just in case something goes wrong. It works fine....I just dont like the noise. I've put about 2500 miles .......


    [​IMG]

    Leon
     
    Last edited: Nov 24, 2011
  4. BLKnBad71Z

    BLKnBad71Z Veteran Member

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    If you want to do this on a old tank that had gas in it, you can send the tank to a rad shop and have it boiled out to get rid of all the gas and fumes. My buddie added a comp eng sump to my tank and we just cleaned it out good and he uses a ex hose stuck in the tank and runs a car to pump the ex fumes into the tank to get rid of any gas fumes when welding.
     
  5. anesthes

    anesthes Veteran Member Lifetime Gold Member

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    You can also put dry ice in it 30 minutes before you weld it.

    I removed my tank in April, and drained it.

    Then I built a house over the summer.

    Now I'm back to playing with the car. So there was zero fumes. I wouldn't drain one at noon, and try welding at 1PM without SOME type of clean out :)

    -- Joe
     
  6. anesthes

    anesthes Veteran Member Lifetime Gold Member

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    Updated picture.
     
  7. gregs78cam

    gregs78cam Member

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  8. TheMeat

    TheMeat Veteran Member

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    Can you post the files to this site so we dont have to register at the other one?
     
  9. gregs78cam

    gregs78cam Member

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    Uh, I tried but file too big :mad: Sorry. oh well it is along the same lines as posted here, just with 24 bolts through the new flange, gasket, and into riv-nut inserts in the top of the tank.
     
    Last edited: Dec 4, 2011
  10. TheMeat

    TheMeat Veteran Member

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    You mentioned that the later 2nd Gen tanks are "taller".

    Is this true rendering the modification you describe in this thread only applicable to later 2nd gen cars?

    Do you have a measurement of your tank height or a minimum height that would be required?

    Thanks.
     

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