01-12-2019, 09:11 AM | #1 |
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Launch control and wheelspin
It's very frustrating, my car goes out of launch control very frequently especially with racechip. I am very jealous when you guys post 0 to 60 times of 2.7 sec with racechip.
I have tried different roads, diff rpms. Even on drag strip sometimes it does that. Is there something wrong with my car? It happens with wheelspin or wheel hop when launching. I have stock 20 inch Michelin 4s tires. I am pretty sure e63s does not do this. |
01-12-2019, 10:10 AM | #2 | |
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01-12-2019, 10:15 AM | #3 | ||
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You can't wait to long, as soon as you see those flags you release the break, otherwise it will build boost and it will spin like crazy. Practice buddy I am going with wider and stickier tires
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01-12-2019, 11:10 AM | #4 | |
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01-12-2019, 02:29 PM | #5 |
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BMW LC is not the best, especially on this new chassis.
I couldn't get my G30 540 to do LC with RaceChip. The rear wheel will spin off traction before the LC. It was much easier on my previous, F15 X5 and F06 650GC.
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01-12-2019, 03:57 PM | #6 |
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I going to track tonight will keep pressure around 28psi cold in all 4 and see what happens. Will either add race gas if pump has it or boostane to arizona 91 octane gas.
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01-12-2019, 04:01 PM | #7 | |
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Lucky you, it's snowing here
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01-12-2019, 04:51 PM | #8 | |
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I am not too familiar in drag, but when I do track day, I try to maintain my tires around 32-34 hot.
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01-13-2019, 01:51 AM | #10 |
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Today was 1/8 mile unprepped surface racing.
Best was 7.4 sec 1/8 mile. Dragy reported best 0 to 60 3.4 sec. Also was using race gas 5 gallons 100 octane added to about 1/2 tank. Race chip set at race mode. 0 to 60ft did not improve more than 1.8 sec. Man something is wrong with my car, others can do better even stock. |
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01-13-2019, 08:05 AM | #11 | |
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01-13-2019, 09:42 AM | #12 | |
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Maybe you can give us the details on how you run the car. Such as, launch RPM, driving mode, shifter mode, traction control mode, etc.
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01-13-2019, 09:56 AM | #13 |
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01-13-2019, 09:57 AM | #14 | |
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I let it go as soon as the flag comes. |
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01-13-2019, 11:28 AM | #15 | ||
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What is your altitude,temperature, humidity in your area? Most important is the traction. Obviously more spin more lost time. You need to WARM up those tires for better traction! Here are some numbers I got 0-60 on winter tires with RC
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01-14-2019, 05:29 AM | #17 |
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Dragy
You need to buy a dragy and download the app
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01-14-2019, 07:37 PM | #18 | |
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The attached dragy run was on map 6 (CA 91 octane) without early brake release for full rpm in LC. Road/tire temp is quite important. I ran most runs in Bay area near Tesla. The weather was near 70 for the run (a bit after noon time). I tried few times at night and got too much spin as temp were bellow 45. I tried map 7 but it required early brake release for spin control. Less turbo boost made the time similar to map 6 full rpm. Replacing both rear tires soon and will try to see if that will allow full rpm LC under map 7? |
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01-14-2019, 07:55 PM | #19 | ||
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Mine was done at 40 deg. Lol
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01-14-2019, 11:52 PM | #20 |
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I used to live in Indiana, a beautiful place in winter. However, I don’t miss it that much if driving a F90 M5. With this big toy, 40 degree is good for little sliding fun with MDM 4WD or bigger excitement with 2WD if there is more room...... Hope you will enjoy the up coming spring!
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07-27-2019, 08:51 AM | #22 |
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Continental DWS06 265/35-20 front 275/35-20 rear (32psi cold)
Launch Control in 70F 80% humidity No Tune but has Full 3.5 Downpipes on Costco 93
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