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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Dissapointed day at the drag strip



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      08-13-2011, 04:13 AM   #1
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Dissapointed day at the drag strip

http://www.e90post.com/forums/showthread.php?t=570503
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      08-13-2011, 04:21 AM   #2
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6MT? Lack of traction?
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      08-13-2011, 04:29 AM   #3
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yup, 6MT
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      08-13-2011, 02:47 PM   #4
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Sup George!

I'd probably try a 80/20 meth mix, and what were your user adjustable values on the Procede?

Did you get line-lock with your LSD? Maybe burning out would help with traction a little on street tires?

Everytime I went to the strip, I also had traction issues, but that's without LSD or line-locks, and on street tires. My '60ft was just like yours, my best '60 was a 2.1 I believe, with the trap being 114.XX at 12.67.

That was just with MS109.....

I need to practice my launching skills to cut the '60ft time down to 1.8-1.9.....I know that's possible even with street tires.....LOL.
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      08-13-2011, 03:09 PM   #5
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If you are seeing 115+ traps with traction control intervening, your true traps can potentially be 116-117mph. Because I'm sure it's cutting throttle/boost going into 2nd gear as well. Theres really no secret to getting low 60' with a 6mt. You need either drag radials or slicks. And if u want to cut really good 60' times, you'll need a line lock to heat them up properly. I went from cutting 2.2-2.4 60s to 1.6-1.7 by doing that. At just 16.5psi u have the power to run low 12s. Do yourself a favor and work on taction. Just cranking up the boost to 20psi will make you a little better ET but it will be a bigger disappointment. It's also worth datalogging runs so you can evaluate everything including shift times.
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      08-13-2011, 03:47 PM   #6
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Quote:
Originally Posted by shiv@vishnu View Post
If you are seeing 115+ traps with traction control intervening, your true traps can potentially be 116-117mph. Because I'm sure it's cutting throttle/boost going into 2nd gear as well. Theres really no secret to getting low 60' with a 6mt. You need either drag radials or slicks. And if u want to cut really good 60' times, you'll need a line lock to heat them up properly. I went from cutting 2.2-2.4 60s to 1.6-1.7 by doing that. At just 16.5psi u have the power to run low 12s. Do yourself a favor and work on taction. Just cranking up the boost to 20psi will make you a little better ET but it will be a bigger disappointment. It's also worth datalogging runs so you can evaluate everything including shift times.
+1 traction is king at the drag strip. Increase traction until you dont spin and dead hook, then increase HP until you cant dead hook, increase traction, break something, replace with stronger parts, dead hook again, increase HP, break something...........


and it goes on and on
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      08-13-2011, 03:47 PM   #7
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Quote:
Originally Posted by shiv@vishnu View Post
If you are seeing 115+ traps with traction control intervening, your true traps can potentially be 116-117mph. Because I'm sure it's cutting throttle/boost going into 2nd gear as well. Theres really no secret to getting low 60' with a 6mt. You need either drag radials or slicks. And if u want to cut really good 60' times, you'll need a line lock to heat them up properly. I went from cutting 2.2-2.4 60s to 1.6-1.7 by doing that. At just 16.5psi u have the power to run low 12s. Do yourself a favor and work on taction. Just cranking up the boost to 20psi will make you a little better ET but it will be a bigger disappointment. It's also worth datalogging runs so you can evaluate everything including shift times.
the 13.007@115.18 was with traction control on and 13.045@115.45 was with traction control off.
So you are saying with 6MT , there's just no way to cut down the 60' time to 1.9 or 1.8 without drag radials or slicks?
Were I suppose to take off easily on 1st gear or punch it hard right off the line?
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      08-13-2011, 03:48 PM   #8
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Quote:
Originally Posted by thwgw24 View Post
the 13.007@115.18 was with traction control on and 13.045@115.45 was with traction control off.
So you are saying with 6MT , there's just no way to cut down the 60' time to 1.9 or 1.8 without drag radials or slicks?
Were I suppose to take off easily on 1st gear or punch it hard right off the line?
yes you can get a better 60ft if you can control your right AND left foot better. slip the clutch more, feed in the power until your on the limit of traction etc.

honestly though, if the track prep is horrible then you have no chance.

I've seen 60ft w 335 w open diffs in the 1.8's w a 6MT on street tires, but its not easy.
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      08-13-2011, 03:54 PM   #9
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to give you an idea, here is Jamie Furman's driving resume on bone stock street tire records. The man is a driving machine.





the list goes on and on

ACR
Z06 GT2
Ford GT
etc
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      08-13-2011, 03:56 PM   #10
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Quote:
Originally Posted by thwgw24 View Post
the 13.007@115.18 was with traction control on and 13.045@115.45 was with traction control off.
So you are saying with 6MT , there's just no way to cut down the 60' time to 1.9 or 1.8 without drag radials or slicks?
Were I suppose to take off easily on 1st gear or punch it hard right off the line?
Basically what Sniz said. I too have heard of random cars cutting 1.8-1.9 60' on street tires. But I have never witnessed this myself. If track prep is exceptionally good and the stars align magically, I suppose it is possible. But I've never seen or experienced such a feat myself. You can play around with different launching strategies but ultimately there is only so much traction available between your tires and drag strip concrete. Since you don't have control over the concrete, all you can do is work on the tires.
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      08-13-2011, 04:08 PM   #11
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so with my mods, am I trapping at the right speed?
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      08-13-2011, 04:15 PM   #12
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Quote:
Originally Posted by thwgw24 View Post
so with my mods, am I trapping at the right speed?
With some more traction you'd easily see 116-117mph. And that is pretty damn solid for a daily driving set up. Those 120mph traps that you see from time to time are drag strip prepped cars. By that I mean 20psi peak boost running race gas+meth with weight reduction.
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      08-13-2011, 04:31 PM   #13
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Quote:
Originally Posted by thwgw24 View Post
the 13.007@115.18 was with traction control on and 13.045@115.45 was with traction control off.
So you are saying with 6MT , there's just no way to cut down the 60' time to 1.9 or 1.8 without drag radials or slicks?
Were I suppose to take off easily on 1st gear or punch it hard right off the line?
With practice high 1.8x and low 1.9x is very doable. My last time at MIR i was on 19" vmr 710 wheels with 235 wide continental dws all seasons all around (square setup). I cut 1.91-1.97s 6 out of my 9 runs. Practice a bit and don't line up on rubber when at the line.
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      08-13-2011, 04:41 PM   #14
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Quote:
Originally Posted by thwgw24 View Post
So you are saying with 6MT , there's just no way to cut down the 60' time to 1.9 or 1.8 without drag radials or slicks?
maybe with an Xi
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