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      04-02-2024, 09:00 PM   #1
gcbm5
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F10 m5 drag racing

Hey guys! Looking to get some advice on drag racing these cars. I have a 13 m5 with stage 2 e30 tune and 305 19inch Mickey Thompson ETS. Been having trouble getting a good launch. Trying to get the best quarter time and looking for any advice on best launch procedure/ tips. Thanks!
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      04-04-2024, 10:10 AM   #2
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Why 19"? I'd try some 315s. on 20" rims. Do you use MDM mode?
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      04-04-2024, 08:37 PM   #3
gcbm5
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Thatís a good idea and I was thinking to give a little more sidewall. No just traction all the way off using launch control. Been playing with xhp
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      04-06-2024, 01:29 AM   #4
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If you have bm3 you can do boost by gear. May help with traction in 1st and 2nd gear.
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      04-06-2024, 10:14 AM   #5
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Yea launching these cars is not easy. Also be careful of the diff! I get wheel hop often. My best is 11.3@126 on Cup2R's with a stage 1 93 tune, but my 60ft is still terrible (1.8-1.9). This is using launch control with warm tires launching around ~2800rpm on a street surface.
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      04-06-2024, 01:54 PM   #6
gcbm5
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Quote:
Originally Posted by SmokinJoe View Post
If you have bm3 you can do boost by gear. May help with traction in 1st and 2nd gear.
Yeah I do and Iím thinking that would be good to pull back some boost so I can really hook up nice because this thing has so much down low that is wasted. Just gotta get it just right!
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      04-06-2024, 01:55 PM   #7
gcbm5
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Quote:
Originally Posted by TrueNorthM5 View Post
Yea launching these cars is not easy. Also be careful of the diff! I get wheel hop often. My best is 11.3@126 on Cup2R's with a stage 1 93 tune, but my 60ft is still terrible (1.8-1.9). This is using launch control with warm tires launching around ~2800rpm on a street surface.
Yeah itís definitely not easy! Thatís really solid on stage 1! Iím running stage 2 e30 blend and Mickey Thompson et streets so hopefully on the drag strip being prepped I can really get some good hook ups. I heard about that as well and needing upgraded cv axles. 2,800 nice spot to launch it at?
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      04-06-2024, 11:06 PM   #8
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If all else fails you can try launching off essentially idle without launching control. Feather the throttle for half a second before laying down the full hammer. It's worth practicing before going to the track. I know that once the rears start to spin, it only gets worse unless you shift early and bog the engine or let off. In my case best times were with launch control but it wasn't easy to get everything right.
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      04-07-2024, 04:24 AM   #9
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If you're going to beat it hard on the drag strip you might want to do this-
https://www.rkautowerks.com/index.ph...et-diff-mount/
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      04-07-2024, 01:51 PM   #10
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Quote:
Originally Posted by TrueNorthM5 View Post
If all else fails you can try launching off essentially idle without launching control. Feather the throttle for half a second before laying down the full hammer. It's worth practicing before going to the track. I know that once the rears start to spin, it only gets worse unless you shift early and bog the engine or let off. In my case best times were with launch control but it wasn't easy to get everything right.
Yeah that makes sense and Iím going to play with it this week before next weekend when I go to the strip. I also agree with xhp and dialing it in the best times are achieved when using the launch control.
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      04-08-2024, 02:54 PM   #11
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Originally Posted by KurtsM5 View Post
If you're going to beat it hard on the drag strip you might want to do this-
https://www.rkautowerks.com/index.ph...et-diff-mount/
Yeah I heard those are good but expensive lol
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      04-10-2024, 06:34 AM   #12
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Originally Posted by gcbm5 View Post
Yeah I heard those are good but expensive lol
Ridiculously expensive...
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      04-12-2024, 01:37 AM   #13
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Quote:
Originally Posted by KurtsM5 View Post
Ridiculously expensive...
True, but way less expensive than destroying your driveshafts and other components. I will install the billet diff mount shortly, as itís a known weak spot in the overall drivetrain.
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      04-12-2024, 08:16 AM   #14
gcbm5
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Quote:
Originally Posted by SCD-1983 View Post
True, but way less expensive than destroying your driveshafts and other components. I will install the billet diff mount shortly, as itís a known weak spot in the overall drivetrain.
Yeah thatís a good point! Iíll be getting one soon after I save up some more in the m5 parts fund lol
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