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  1. #1
    Join Date
    Oct 2007
    Posts
    934

    Default E85--Oxygenated Gas--Pump gas

    lets talk fuel
    lets swap stories
    lets discuss problems
    what do YOU like?

    Brad
    Race-1.com

  2. #2
    Join Date
    Jan 2014
    Posts
    25

    Default

    Funny you posted this. I was planning on calling you in a bit to pick your brain on an issue im having.

  3. #3
    Join Date
    Oct 2007
    Posts
    934

    Default

    fire away---sharing issues with everyone is always a good thing
    If I cannot help --I am sure we can talk it through with someone here

    Brad
    www.race-1.com

  4. #4
    Join Date
    Aug 2018
    Posts
    3,104

    Default

    What should the carb maintenance be from week to week? We seem to be getting a fair amount of residue!

  5. #5
    Join Date
    Oct 2007
    Posts
    934

    Default

    what fuel are you on zero?

    Brad
    www.race-1.com

  6. #6
    Join Date
    Aug 2018
    Posts
    3,104

    Default

    VP Crate Horsepower

  7. #7
    Join Date
    May 2007
    Location
    in a van down by the river
    Posts
    1,773

    Default

    Brad,
    Do you see any real performance differences in leaded e-85 race fuel in a drum, and tested good e-85 from the gas pumps at local gas station?
    I think there should be lifeguards in the genepool.

  8. #8
    Join Date
    Oct 2007
    Posts
    934

    Default

    zero25--
    CHP is tuff on everything
    there is no denying the power it makes but it comes with a price--
    we recommend running an upper lube with that fuel (marvel mystery oil works fine)
    use as directed ---more is not better
    beyond that ---anytime the car will sit idle for more than a week---the fuel system should be drained and flushed with a non oxygenated fuel juiced with the same upper lube
    also---replace power valves in the carb twice a year
    call me with any questions

    Brad
    www.race-1.com

  9. #9
    Join Date
    Oct 2007
    Posts
    934

    Default

    Just add dirt,
    E-85 fuel---pump VS race grade
    on the dyno we have seen absolutely no difference between race grade (leaded) E85 and "GOOD" pump E85
    here is the problem---I am not even going into the ethanol content discussion as I hope everyone already understands the importance of testing the content
    BUT ---pump fuels are generally stored underground and anything stored underground is subject to moisture issues
    If your station does not move a high volume of e85 there can easily be a moisture issue in your fuel.
    it is critical to engine performance to have moisture free fuel that is at a content of 84 to 86 % ethanol
    when we have this recipe we do not see any difference in dyno numbers---however we believe in track performance over dyno testing --so if you tell me the one or the other performed better on track we will analyze the situation to form a scientific explanation as to why

    sorry to ramble there but there is not a clear answer to your question ---there are variables

    Brad
    www.race-1.com

  10. #10
    Join Date
    Nov 2019
    Posts
    3

    Default

    For a 604 I'm seeing people running 650 and 750 carburetor what's power difference or is one better than the other?

  11. #11
    Join Date
    Oct 2007
    Posts
    934

    Default

    we lived in 650 land for ever no matter what the fuel because 650's just accelerate better
    BUT
    recently (last year or so) for E85 we have moved to a bit larger carb for E85 because our builder (Stealth) has figured out a few things to maintain acceleration rate with a little more air to carry the engine at the end.

    carb size 101----bigger carbs make power at a higher RPM---smaller carbs accelerate better but lack power on the topside

    currently (for most applications) on E85 we use a 700 for 602's which is a 1.300 venturi and 730 for 604's which is a 1.345 venturi but that is Stealth---if I were using a different manufacturer I would quiz them on acceleration VS power

    we still use 650's for all gas applications (1.250 venturi)

    hope that helps
    Brad
    www.race-1.com

  12. #12
    Join Date
    Dec 2008
    Location
    thedirtysouth
    Posts
    3,356

    Default

    hey brad , just curious , have you done any testing with a E85 500 cfm 2brl on a 602 ?

  13. #13
    Join Date
    Oct 2007
    Posts
    934

    Default

    I have not had that opportunity----we do have a ton of 2 brl stuff on 602's but it's in an area where they mandate gas
    my guess is that it would be awesome
    602's love e85 and they do well on 2brl's

    I wore myself out trying to improve on the adapter for gas and I believe the adapter for e85 might need some tweeks as well to get the best result

    Brad
    www.race-1.com

  14. #14
    Join Date
    Dec 2008
    Location
    thedirtysouth
    Posts
    3,356

    Default

    ok , the new factory stock class we have requires a 2 brl period , whether a built engine or a 602 ....

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