Frame Rail Inner Corrosion

Discussion in 'InsideTopAlcohol.com Tech Questions' started by TOL, Apr 21, 2019.

  1. TOL

    TOL Active Member

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    A lot of applications plumb their engine breather purge lines to the frame rails, and then to the puke tank.

    Does the condensation corrode the tube much from the inside out over time?

    Has anyone ever had reason to cut one apart and check?

    Do people tend to install little drain valves at strategic low points along the breathing path?

    Always wondered about this.....

    Thanks.
     
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  2. MaineAlkyFan

    MaineAlkyFan Active Member

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    We run threaded stubs low on the rails with AN plugs in them & drain the rails on the stands every few passes. Locate the stubs so when the car is on the stands they are in a low point on the rails (preferably up front). That way you can hang a gallon bucket & let them drain while doing normal between round servicing.

    Chris Saulnier - Team Tigges
    Mechanic Falls, Maine
     
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  3. TOL

    TOL Active Member

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    Would it be allowable to run a dedicated hard aluminum vent pipe through the interior, along one of the rails at floor level, to the rear where the puke tank will be located?

    Alternatively, maybe have the puke tank up front and then hard pipe the vent off the puke tank through the interior to the rear in the same manner as described above?

    Either way I'd like to get the tip of the vent path back into the high vacuum area behind the rear cab window.
     
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  4. rb0804

    rb0804 Member

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    How much do you usually get out of it?
     
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  5. MaineAlkyFan

    MaineAlkyFan Active Member

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    Not too much out of the rails, at the most 1/2 - 3/4 pint after three runs. We drain the puke tank after every pass which will yield close to a pint per pass RPM dependent with some alcohol as well. If the rail/puke/plumbing is efficient, with good venting, the scavenge is pretty good & doesn't leave much in the rails.

    [​IMG]

    [​IMG]

    Chris Saulnier - Team Tigges
    Mechanic Falls, Maine
     
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