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Thread: HydraMat for 1968 Chevelle

  1. #1

    Default HydraMat for 1968 Chevelle

    I have a Tanks Inc fuel tank with a Walbro 400 in-tank pump and unless the tank is 100 % fuel, it loses fuel pressure on launch for a split second and falls on its face! Does anyone know what size HydraMat would solve my problem for a 1968 Chevelle?

  2. #2


    This one is plug & play with the W400 pump: My buddy just installed one in his stock '66 Fairlane tank, and it works great. Andrew

  3. #3


    Thanks Andrew! I ordered one from Summit yesterday. I'll install it in the next few days.

  4. #4


    FYI: To anyone looking to use the Holley HydraMat in a Tanks Inc Chevelle EFI tank, it will NOT work! There's a wall around the pump area inside the tank.

  5. #5


    Why do you need the HydraMat if you already have a baffled tank? My buddy put it into his stock Fairlane tank because it had no baffles. Andrew

  6. #6
    Join Date
    Dec 2009


    Correct. If you already have an in-tank sock filter & baffled fuel tank, then a HydraMat won't solve a "fuel pressure on launch" problem.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS T/W 11R 205 heads, 232°-244° duration/.623" lift/114° LSA camshaft, 12:1 C/R, TFS R-Series FTI ported intake, BBK 80mm T/B, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 200A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, -6AN fuel system plumbing, Walbro 255 LPH pump, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/3000 RPM converter, B&M Hammer shifter, FPP aluminum driveshaft, FPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 M/T Street Comp tires.

  7. #7


    If I had 1/2 tank or less, the fuel pressure would drop to zero at launch! If I filled the tank, it would work fine.

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