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  1. #1
    Boost addict hotbird's Avatar
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    Anyone have problems With BP Fuel? Knock Knock

    My skis have had a history with a lot of knocking, Wondering if I should change fuel brands.

    The BP station is right by the boat launch so I usually go there, but Maybe I should give another brand a try.

    I've heard I should not need race gas or e85 till about 17+ PSI

    My last ski ran a et137x4 wheel and was knocking a lot and now the new ski is knocking with just a stock x charger wheel. On a cold ride (43deg F out) it was knocking up a storm. I did have the timing a bit high but still 35 deg of timing and the cold weather should not have knocked that bad?

    They only sell 91 octane here also and I know that doesn't help. Price per gallon is not a huge deal, If that station sold race fuel I would probably run it, but they don't.

    Maybe I could locate some race fuel and mix it 50/50 with the 91?

    I'm thinking if its knocking at around 12 psi this turbo I'm installing is going to make it worse, sure I can pull timing but that kills power so................

    What are your thoughts?


  2. #2
    brendanm's Avatar
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    Maybe its the nitrous?

    I never fill up at the marina, always a servo with a decent turnover.

  3. #3
    Steve-m31164's Avatar
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    Over here Andy BP , Mobil and caltex 98octaine are probably the best . I never fill up on the water and try to use a high turnover servo .Imo you are going to go nuts worrying for the next few months as i said just send your ski over here

  4. #4
    captain slow Turbo Retro's Avatar
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    Quote Originally Posted by Steve-m31164 View Post
    Over here Andy BP , Mobil and caltex 98octaine are probably the best . I never fill up on the water and try to use a high turnover servo .Imo you are going to go nuts worrying for the next few months as i said just send your ski over here
    I tried peak 98 here with ethanol and the super stock ecu was not happy..

    I then used bp ultimate 98 and holy crap!! It scared hit out of me..

    Hot bird, as a fellow turbo owner, u should send it to me. Guys with conversion ski's are just confused

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  6. #5
    Steve-m31164's Avatar
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    I wouldn't put ethanol fuel in my company car no matter how small % of ethanol . Maybe I need a honda engine in my kawa then I'd have then all covered .

  7. #6
    Impulses's Avatar
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    In my Bmw X5 BP gasoline once you got sick, so q since I never use it again. I love Shell








  8. #7
    Mod less, ride more! troyheb's Avatar
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    Chances are BP did not make the fuel you are using. BP sold all their refineries in the US last year except for 3.
    Higher octane fuel never hurts.

  9. #8
    Steve-m31164's Avatar
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    In Australia Shell high octane is the WORST fuel you could ever use in a ski or motorbike ..

  10. #9
    Bob 1tommygunner1927's Avatar
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    Quote Originally Posted by hotbird View Post
    My skis have had a history with a lot of knocking, Wondering if I should change fuel brands.

    The BP station is right by the boat launch so I usually go there, but Maybe I should give another brand a try.

    I've heard I should not need race gas or e85 till about 17+ PSI

    My last ski ran a et137x4 wheel and was knocking a lot and now the new ski is knocking with just a stock x charger wheel. On a cold ride (43deg F out) it was knocking up a storm. I did have the timing a bit high but still 35 deg of timing and the cold weather should not have knocked that bad?

    They only sell 91 octane here also and I know that doesn't help. Price per gallon is not a huge deal, If that station sold race fuel I would probably run it, but they don't.

    Maybe I could locate some race fuel and mix it 50/50 with the 91?

    I'm thinking if its knocking at around 12 psi this turbo I'm installing is going to make it worse, sure I can pull timing but that kills power so................

    What are your thoughts?
    Lately, I have noticed an increase in fuel injector duty percentage......going from the low 70% to nearly 80%. Makes me wonder if the ethanol percentage has been increased from 10% to 15%.

  11. #10
    imp0ster's Avatar
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    gas gets shittier when it gets colder. Winter blends.

    I always plop in Klotz or Torco just to cover my ass from any knock.

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