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Thread: Hypertech 3.7L Review

  1. #11
    Lifetime Member Getting Dirty IamJEEP's Avatar
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    Quote Originally Posted by AJeepZJ View Post
    It can... It will ask for gas specs... You can select stock, regular, and I think it has premium- I willconfirm the diff grades in the morning - onky thing im confused about is ifi should tune it first then pump the gas, or pump the gas and then tune.
    I don't think it would matter which one you do first as long as you add the fuel you tuned for.
    ****Uwharrie Aprroved****
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    Quote Originally Posted by AJeepZJ View Post
    Then I drove her hard for about 45 mins.

  2. #12
    Lifetime Member Getting Dirty Lt_JWS's Avatar
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    You should run 93 before you tune for 93, the main power adder with all tuners is advancing the timing, in theory your advancing the timing by around 6 degrees from 87 to 93 octane, if you don't run 93 and tune for it your gonna get detonation(spark knock, valve rattle whatever you want to call it) you could damage your engine. Another good thing to remember is most fuel today is gonna have ethanol so that can lower the octane rating alittle in itself.
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  3. #13
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    ^thanks

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