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Thread: Holley 12-130 In-Tank Retro-Fit Fuel Pump

  1. 03-04-2018, 08:13 AM #1
    Mez1931a
    Mez1931a is offline Junior Member
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    Default Holley 12-130 In-Tank Retro-Fit Fuel Pump

    Holley 12-130 In-Tank Retro-Fit Fuel Pump. If I follow the directions, the filter mat will be 2" off the bottom of the tank. It says on a 12" deep tank to cut the pickup hose to 5". That would put the HydraMat 2" off the bottom. Is that correct? How far off the bottom do you want it? What RTV do you use to seal the foam gasket? Thanks!
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  2. 03-04-2018, 08:42 AM #2
    Danny Cabral's Avatar
    Danny Cabral
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    Quote Originally Posted by Mez1931a View Post
    That would put the HydraMat 2" off the bottom. Is that correct?
    No.

    How far off the bottom do you want it?
    It should lightly contact the bottom surface of the fuel tank.
    Holley HydraMat Instructions: LINK - see figure 15, page 8.
    Holley HydraMat Brochure: LINK - see top photo on page 6.

    What RTV do you use to seal the foam gasket?
    From the Holley 12-130 In-Tank Retro-Fit Fuel Pump instructions (LINK):
    "The foam ring gasket can compensate for ribbed tank surfaces up to .28" deep.
    Deeper ribs or more perpendicular ribbed walls will require an additional sealant such as Dow
    Corning 730 fluorosilicone RTV (LINK) between the foam ring gasket and the tank surface."

    Silicone Solutions SS-300:
    http://siliconesolutions.com/ss-300.html (Automotive Gasoline Resistant Silicone RTV)
    http://siliconesolutions.com/media/pdf/SS-300TDS.pdf (Technical Data Sheet)
    http://siliconesolutions.com/media/pdf/SS-300SDS.pdf (Safety Data Sheet)
    May God's grace bless you in the Lord Jesus Christ.

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