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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > B58 Turbo Engine / Drivetrain / Exhaust Modifications > 440i xdrive bm3 ots e30 s2 tune - dragy results 0-60 and 1/4 mile
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      07-03-2019, 10:39 AM   #23
SoCalCarGuy
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Originally Posted by chaungo View Post
On 6MT, my friend could dump the clutch at 4500rpm, but the clutch or xfer case did not like it at all. Reason why we're not able to go past 3500rpm some cases is because any higher on 8at and you risk blowing up something in the trans or other stuff.
I suggest a trans tune that puts 70% rear 30% front so we get a little slip. Too much traction is actually hurting the launch IMO. we need to get the turbo to spool faster.

we should be cutting 1.65 60' a and 0-60 in 3.3-3.5 sec.
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      07-03-2019, 11:53 AM   #24
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Quattro Audi’s are cutting 0-60s in the high 2’s with ots flash tunes...more robust AWD systems?
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      07-03-2019, 02:03 PM   #25
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Quattro Audi’s are cutting 0-60s in the high 2’s with ots flash tunes...more robust AWD systems?
Maybe...are you referring to the rs3/rs7? They do use a haldex 50/50 awd system which I believe does help to some extent with launching were as BMW xdrive is more rear biased but don't know if that really is an issue. The other thing is that our launch control is limited to 2500rpm. I think if we were allowed to go higher say maybe 3500-4000 it would allow for a much more aggressive launch.
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      07-04-2019, 04:02 AM   #26
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Quote:
Originally Posted by Solid67 View Post
Maybe...are you referring to the rs3/rs7? They do use a haldex 50/50 awd system which I believe does help to some extent with launching were as BMW xdrive is more rear biased but don't know if that really is an issue. The other thing is that our launch control is limited to 2500rpm. I think if we were allowed to go higher say maybe 3500-4000 it would allow for a much more aggressive launch.
do not use launch control, just brake/gas pedal, launch control makes some lag while launching and it can be seen in dragy G force graph.
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      07-04-2019, 09:56 AM   #27
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Originally Posted by enemigo13 View Post
do not use launch control, just brake/gas pedal, launch control makes some lag while launching and it can be seen in dragy G force graph.
gonna give that that a try.

the car definitely bogs/waits for turbo. This thing needs to leave on boost!!!!!!
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      07-04-2019, 01:32 PM   #28
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Originally Posted by enemigo13 View Post
do not use launch control, just brake/gas pedal, launch control makes some lag while launching and it can be seen in dragy G force graph.
Can you share a link or pics on this and what car is used?
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      07-04-2019, 10:23 PM   #29
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Quote:
Originally Posted by SoCalCarGuy View Post
I suggest a trans tune that puts 70% rear 30% front so we get a little slip. Too much traction is actually hurting the launch IMO. we need to get the turbo to spool faster.

we should be cutting 1.65 60' a and 0-60 in 3.3-3.5 sec.
XHP makes a custom launch control where you can control slip and how much torque you want at launch. Try to experiment with it.
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      07-05-2019, 09:56 AM   #30
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Originally Posted by chaungo View Post
XHP makes a custom launch control where you can control slip and how much torque you want at launch. Try to experiment with it.
i'd much prefer someone else experiments and then I buy.
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      07-05-2019, 10:39 AM   #31
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Originally Posted by janea1207 View Post
any info about 100-200km/h time???

In this thread:

https://f30.bimmerpost.com/forums/sh....php?t=1621233
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