Dual fuel pumps

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2004-2007 Cadillac CTS-V Performance Mods Discussion, Dual fuel pumps in Cadillac CTS-V Series Forum - 2004 - 2007; While building my second motor I thought I would build the fuel system to handle the twin turbos at some ...
  1. #1
    bjohnso0 is offline Cadillac Owners Fanatic
    Automobile(s): 2005 CTS V
    Join Date
    Dec 2005
    Lancaster, TX

    Dual fuel pumps

    While building my second motor I thought I would build the fuel system to handle the twin turbos at some higher boost levels. My previous set up ran 6 psi of boost, stock fuel pump and a Magnavolt. The idea of relying on a fuel pump booster had me nervous. The route I took this time was two Walbro 255 HP pumps. The first one is the Racetronix FP008 made for the V with a hot wire kit for wiring. Which I was disappointed in because it is just a GSS342 with the pressure hose pre-installed on it. The fuel sock was a universal one that I couldn't use, so I had to reuse the original sock (no big deal, only had 22K miles on the car). The second pump is a GSS342 pump mounted to the second sending unit with a small bracket that I fabbed up. I will wire this pump to a hobbs switch set to about 2 psi, so this pump will run only while under boost condtions.

    I know someone on here has done this before, but had to send their tank out to have it modified and it was expensive.

    Total cost (not including my labor) was $357.XX for parts and shipping from Racetronix. Probably another $100-$130 for braided line, fittings and misc.

    Here's a link to some pics of the install...........

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  3. #2
    Zo6PwRd Guest

    Re: Dual fuel pumps

    When i looked, i was gonna have Lonnies Performance custom make a twin in tank setup for about a grand but itd all be drop in and go.

  4. #3
    Naf's Avatar
    Naf is offline Cadillac Owners Connoisseur
    Join Date
    Apr 2007

    Re: Dual fuel pumps

    I dont trust the walbro 255s much...I got two new pumps, a 290 from a jap car and a 390 JUST INCASE I Decide to go supercharged...

    The 290 is now installed in my car, but i havent cranked mine due to drysump issues...I will be startin my little beast up next week...

    Waitin on a new crank from LPE to install the LS7 dry sump system... Two lines will be used instead of five...

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