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F82 fuel starvation on track

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    F82 fuel starvation on track

    I don't see many people posting here, but I'd rather try here before I go into the shithole that is F80Post. Background: F82 M4 Competition, Ohlins R&T coilovers, 18" EC-7s wearing 275/305 NT01 tires. It's not my car but I've been dual driving it lately and pushing it harder than it's been pushed before, hence this post.

    I've been running into severe fuel starvation issues, specifically on an off-camber right hander. This kind of makes sense to me, since the fuel pickup is on the right side I believe. Basically anytime I start with the needle around 1/2 tank or lower, I can't make it through a 20 minute session without going into limp mode. Which then involves me throwing the hazards on and puttering off the track while praying no one hits me.

    Given I use more than 1/3 of a tank (indicated at least) per 20 minute session, and it's being dual driven... even putting 5 gallons in after each double stint resulted in limp mode in the 3rd double stint of the day. Has anyone seen this issue and found a solution? I can't find any kits online like for the E36 and E46 where they put another fuel pump in the other side of the tank.
    '03.5 M3 SMG Coupe - Jet Black / Black

    #2
    Free bump for an interesting question!
    2008 M3 Sedan
    6MT, slicktop, no iDrive, 18s

    OE intake | OE exhaust | OE tune | OE suspension | OE brakes | OE rod bearings | OE wheels | Kenwood head unit 😬

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      #3
      Forgot I posted this here. We discussed this a bit on the F80 forums. No fix is known, just gotta fill it up... given that a 20 minute session uses almost half a tank, it's rough. This is only on NT01s too.
      '03.5 M3 SMG Coupe - Jet Black / Black

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        #4
        Originally posted by r4dr View Post
        Forgot I posted this here. We discussed this a bit on the F80 forums. No fix is known, just gotta fill it up... given that a 20 minute session uses almost half a tank, it's rough. This is only on NT01s too.
        That sucks. Seems like an annoying issue to have, not to mention a weird void in the aftermarket.

        What do the track-only cars do? Fully custom or race-specific tank/pump setups?
        2008 M3 Sedan
        6MT, slicktop, no iDrive, 18s

        OE intake | OE exhaust | OE tune | OE suspension | OE brakes | OE rod bearings | OE wheels | Kenwood head unit 😬

        Comment


          #5
          Originally posted by IamFODI View Post
          That sucks. Seems like an annoying issue to have, not to mention a weird void in the aftermarket.

          What do the track-only cars do? Fully custom or race-specific tank/pump setups?
          BimmerWorld came up with the some of the solutions for the E36 and E46 cars back in the day, but the F82 GT4 cars they're campaigning don't have this problem because they have fuel cells vs. the regular street M4s. They admitted over the phone they hadn't felt motivated to look into solutions because of this... lol.

          I don't know of many track-only F80 cars, but that may change. If someone comes up with a solution (shouldn't be too hard, just add another fuel pump like the other BW kits do) they will definitely have a market.
          '03.5 M3 SMG Coupe - Jet Black / Black

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