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  1. #1

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    Macsboost with Av Gas?

    Is anyone running Macsboost stage II with straight Av-Gas?

  2. #2
    TwoBurgers's Avatar
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    Quote Originally Posted by trxxx250r View Post
    Is anyone running Macsboost stage II with straight Av-Gas?
    I have done it. By avgas you are referring to 100LL - 100 octane light lead blue gas. It's great stuff. When at the Bay the local marina only carries 87 octane, so that does not cut it. That being said, running 100LL I only saw about 1.5 MPH difference (maybe 50 to 100 RPM). I have a portable 14 gal tank that I keep filled with 100LL for all my yard equipment - once treated with Stabil the gas stays good for a very long time. Plus it smells like a GA airport.
    Chris


  3. #3

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    Well thanks, Chris but I wasn't asking about av gas in general and it definitely doesn't make the avg boat go faster. What I was asking was an octane question in a boosted situation like a macsboost 19 lb boost.

    At this point I have used it with the macs stage II and it works very well. So I answered my own question since no one else did.

    I only have 91 in AZ so I mix approx 3:1 av to 91 to get 98 octane to get where I need to be to get the full performance from the macs II. Works great! Hope that answers anyone else's questions.

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