Fuel question
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Fuel question

  1. #1
    Senior Member steadymobbin's Avatar
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    Default Fuel question

    On a 9.5:1 compression should I be running vp c44 fuel or vp Motor sport 105L?

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    Member aj06bolt12r's Avatar
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    93 octane pump gas
    '78 nordic bubble deck, berkm a imp, place diverter, 460 with ported doves and oversize stainless valves, custom flat hyd cam, 1050 dominator, ect...

  4. #3
    Glendale Arizona Squirtcha?'s Avatar
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    Quote Originally Posted by aj06bolt12r View Post
    93 octane pump gas
    Our pump gas out west is 91. I agree though. I'm at 10:1 and running 91 pump gas. IMO running race gas with 9.5:1 is a waste of money.

    Some would think it's crazy, but I'm spraying a 200 shot of N20 on pump gas. Been doing it for quite a few years now.
    Last edited by Squirtcha?; 05-24-2011 at 09:15 AM.

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    "BOATLESS" blender over's Avatar
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    Quote Originally Posted by Squirtcha? View Post
    Our pump gas out west is 91. I agree though. I'm at 10:1 and running 91 pump gas. IMO running race gas with 9.5:1 is a waste of money.

    Some would think it's crazy, but I'm spraying a 200 shot of N20 on pump gas. Been doing it for quite a few years now.
    yea but you run an enrichment tank correct?

  7. #5
    Senior Member jszimmer's Avatar
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    Quote Originally Posted by steadymobbin View Post
    On a 9.5:1 compression should I be running vp c44 fuel or vp Motor sport 105L?

    Have a new 468 built for pump gas 91 octane. compression is 9.5:1, runs awesome everyday. Save some money and make it last.

  8. #6
    Glendale Arizona Squirtcha?'s Avatar
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    Quote Originally Posted by blender over View Post
    yea but you run an enrichment tank correct?
    Nope. Not even running a timing retard on my MSD.

  9. #7
    "BOATLESS" blender over's Avatar
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    Quote Originally Posted by Squirtcha? View Post
    Nope. Not even running a timing retard on my MSD.
    Wow, so my 8.5:1 motor with av gas in the side tanks and 120 in the enrichment tank 6 degrees of retard on a 200 shot is safe then?

  10. #8
    The Man cordog009's Avatar
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    Quote Originally Posted by steadymobbin View Post
    On a 9.5:1 compression should I be running vp c44 fuel or vp Motor sport 105L?
    93/91 pump gas. Running race gas will cost you power because it's harder for your engine to burn it. At 9.5:1 the engine doesn't make enough compression to help burn the fuel. Mine is 13.5:1, and vise versa..if I ran 93/91 the gas would ignite too fast and it'd sound like an old 12 valve Cummins and rattle itself to death.
    Last edited by cordog009; 05-24-2011 at 10:40 AM.


    1984 Youngblood TX-19 SOLD

  11. #9
    About 500' AGL MudPumper's Avatar
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    My motor is 10.5 to 1 and runs on 91 all day long (Aluminum Heads). 250 Shot of nitrous with c16 in the enrichment tank.

  12. #10
    Senior Member nick's Avatar
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    I'm running 91 with 10.5:1 and have been for a while now. Plugs are always perfect. In my opinion you're wasting money on race fuel. Those funds would be far more usefull if they were applied towards cocktails my friend.

  13. #11
    Glendale Arizona Squirtcha?'s Avatar
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    Quote Originally Posted by blender over View Post
    Wow, so my 8.5:1 motor with av gas in the side tanks and 120 in the enrichment tank 6 degrees of retard on a 200 shot is safe then?
    If I'm doing alright...............you're plenty safe.

    MSD dizzy with 10 degrees static advance and the blue bushing for a max mechanical of 21 degrees. Total timing is only 31 degrees. I'm probably only pulling 3 degrees of timing from what would be considered a normal 460 setting. Doesn't seem to hurt my off nitrous performance (at least from what I can tell).

    You can all laugh at me and say "I told ya so" if/when she goes boom.

    We gonna line em up this week Trev? You could have a front row seat for the fireworks.
    Last edited by Squirtcha?; 05-24-2011 at 02:13 PM.

  14. #12
    "BOATLESS" blender over's Avatar
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    Quote Originally Posted by Squirtcha? View Post
    If I'm doing alright...............you're plenty safe.

    MSD dizzy with 10 degrees static advance and the blue bushing for a max mechanical of 21 degrees. Total timing is only 31 degrees. I'm probably only pulling 3 degrees of timing from what would be a normal 460 setting. Doesn't seem to hurt my off nitrous performance (at least from what I can tell).

    You can all laugh at me and say "I told ya so" if/when she goes boom.
    U going to be out this weekend?
    We need to line up

  15. #13
    Glendale Arizona Squirtcha?'s Avatar
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    Quote Originally Posted by blender over View Post
    U going to be out this weekend?
    We need to line up
    You're reading my mind. See above edit. Schedule is weird though. I'll be there Wednesday, Thursday, Friday going home for Saturday and Sunday, and returning for Monday, Tuesday.

  16. #14
    "BOATLESS" blender over's Avatar
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    Quote Originally Posted by Squirtcha? View Post
    You're reading my mind. See above edit. Schedule is weird though. I'll be there Wednesday, Thursday, Friday going home for Saturday and Sunday, and returning for Monday, Tuesday.
    Cool let's do it Friday.
    I'm leaving to go up tomorrow night and coming home monday!

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