flushing fuel system

Discussion in 'PSI Superchargers Tech Questions' started by pat Iley, Mar 3, 2009.

  1. pat Iley

    pat Iley Member

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    What methods can be used to flush alcohol out of your fuel system. You can drain fuel cell but what about fuel pump and injector pieces. should this be done every weekend
     
    #1
    pat Iley, Mar 3, 2009
  2. GregM784

    GregM784 Member

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    On my blown small block, after weekend of racing, i'll drain the tank, and put in about 3 gallons of regular cheap gas. Put in a set of old warm up spark plugs,and light the motor on gasoline (barrel valve about 1/2 to 2/3 closed). I run the motor for 30 seconds to a minute, rack it a few times to get the pump pressure up and all the lines cleared, then lean it out, drain the fuel out (use it for the lawn mower/generator cuz it is now contaminated with alky) and put the car away.

    If the next race is next weekend, i dont do it....
     
    #2
    GregM784, Mar 3, 2009
  3. AFC357

    AFC357 New Member

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    I wouldn't put gas in a cell that will have to pass Fuel Tech!:eek:
     
    #3
    AFC357, Mar 4, 2009
  4. Mike Canter

    Mike Canter Top Dragster
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    You have to "pickle" it. Drain the tank and leave the cap off until totally dry. Make a fitting to connect and air hose to the barrel valve inlet line and blow air through the whole system. It helps to have the blades open. Stuff and old paper towel roll into the blades to hold them open. Then spray Marvel Mystery oil into the BV and connect up the air again and blow the oil through the system. I do this twice letting the air flow for about 30-45 seconds the first time to dry it all out. Then connect to air hose to the pump outlet and blow back through the pump. Then spray Marvel into the pump and blow again. You can never put too much oil through the pump. If you have a seperate fuel management control then you may need to disconnect more lines and connect up the air hose to make sure you get all those valves. Leave that cap off the tank to let it dry out totally. The only real warning is that the Marvel Mystery oil or whatever you use can contaminate the fuel if you are going through a fuel check. If so then a good warmup at the start of the raceweekend using most the fuel should flush it out. I used to use WD-40 but have found strange deposits in the fuel filter and flow sensor from it.
     
    #4
    Mike Canter, Mar 4, 2009
  5. altered boy

    altered boy Outlaw Altered

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    yep... marvel is the shit for keeping your system happy. plus what is left in the system/pump will blend right in with the first gulp of fuel and burn with no problems

    and i've seen so many guys use WD-40 and I DON'T KNOW WHY?? when it mixes with alcohol it does some weird/ugly things... things i would not want in my system
     
    #5
    altered boy, Mar 4, 2009
  6. AFC357

    AFC357 New Member

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    Ditto on the Marvel! Works better than WD on the chassis too;)
     
    #6
    AFC357, Mar 4, 2009
  7. Will Hanna

    Will Hanna We put the 'inside' in Top Alcohol
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    mineral oil

    mineral oil works good too. as long as you don't get too carried away, usually doesn't show back up in fuel check. we chased a problem of the alcohol 'jelly' setting up in the system somewhere, traced it back to the fuel management log we weren't using at the time.
     
    #7
    Will Hanna, Mar 4, 2009
  8. Mikefly

    Mikefly New Member

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    Hi, Witch Marvel do you use is it Super lubricant or Universal lubricant & penetrant in spray can?
    Thank you!
    Mikefly
     
    #8
    Mikefly, Mar 4, 2009
  9. Mike Canter

    Mike Canter Top Dragster
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    I don't think it makes much difference. I have used both. The spray can is the easiest.
     
    #9
    Mike Canter, Mar 4, 2009
  10. Woodchip

    Woodchip Top Alcohol Dragster

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    Back in the eighties, Team I was with used to flow their fuel system on a bench using mineral oil.
     
    #10
    Woodchip, Mar 4, 2009
  11. cpgeneration

    cpgeneration New Member

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    Marvel

    Maybe you should look at the gallon jug.. less expensive and adjustable nozzle spray bottle, works for spraying pistons on install too..:)
     
    #11
    cpgeneration, Mar 4, 2009
  12. altered boy

    altered boy Outlaw Altered

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    why would you wanna do that??
     
    #12
    altered boy, Mar 4, 2009
  13. altered boy

    altered boy Outlaw Altered

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    yep... super dry. i wipe each piston and the cylinder with lacquer thinner or brake cleaner and a clean cloth

    building a race engine... want them to seat ASAP and oil will keep that from happening (or at least slow it down)
     
    #13
    altered boy, Mar 5, 2009
  14. Nitro Madness

    Nitro Madness Super Comp

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    I have heard that other machine shops install piston assemeblies dry like Sean mentioned...I spray em with a light coat of WD-40 as the ring manufacturers recommended when i talked with them at PRI....I used to oil drench them in oil - what a messy process....
     
    #14
    Nitro Madness, Mar 5, 2009
  15. moparchris440

    moparchris440 Member

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    exactly what do also I add about 4-5 ounces of 2 stroke oil to the gas it really oils everything up it.
     
    #15
    moparchris440, Mar 6, 2009
  16. Shoebox

    Shoebox New Member

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    Marvel Mystery oil

    Who sells Marvel Mystery oil ?

    Thanks
    Shoebox
     
    #16
    Shoebox, Mar 9, 2009
  17. eli

    eli Banned

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    Advanced Auto
     
    #17
    eli, Mar 9, 2009
  18. Shoebox

    Shoebox New Member

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    Marvel Mystery oil

    Thanks Eli !
    And they are located all over US ?
    Do you know if anyone sell these in Europe?

    Thanks
    Shoebox
     
    #18
    Shoebox, Mar 9, 2009

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