[Zebra99]

Hey guys,

I was hoping a few of you would take a couple mins to help a brother out

As you may or may not know, I'm now FBO it's an 08 335i E93
(Stett CAI, ER CP/Tial BOV, custom FMIC, VRSF DP's and JB4 on Map 5)

Last time around at Cayuga (before DP's and Map 5) I was slipping/spinning too much and only managed a 14.1s @ 104mph. I was getting better an better, but had no opportunity to keep practicing.

This time around I'd love to break 12's! Can anyone chime in regarding the following.

1. E85 or race fuel near Cayuga. And what map would be better depending on fuel....Map 5 or 7.

2. Launch method? Traction half off, completely off or on? What gear to launch in for optimal traction and immediate launch?

3. Air pressure in my stock 19" Pirelli RFT's. More or less?

4. Any other advice!

Hopefully I can break 12's and come home with a smile on my face. Thanks for any input.

P.S. any of you members are welcome to join me tomorrow on my cruise down!!

[bigdnno98]

Make sure you have the newest jb4 firmware

Race gas

Map 7

Lower tire pressure

If your AT 2nd gear launch around 2500 rpm

Press DTC once. Don't turn it all the way off.

Good luck. You should def run 12s on map 7 and race gas.

[Zebra99]

I have the march 2012 firmware...not sure if that's the newest or not.

As for launch, I'm MT so I guess I'll stick with 1st gear and TC completely off?

Not sure where to find race gas; this is part of the issue.

[bigdnno98]

6MT def 1st gear. Still only one touch DTC. If you can't find race gas e85 is the next best thing. If you want to use map 7 and e85 you need to email Terry @ BMS and do what he tells you. If you just want to play it safe throw in 25%e85 and run map 5.

[sickem]

Originally Posted by bigdnno98

Make sure you have the newest jb4 firmware

Race gas

Map 7

Lower tire pressure

If your AT 2nd gear launch around 2500 rpm

Press DTC once. Don't turn it all the way off.

Good luck. You should def run 12s on map 7 and race gas.

Launching around 2500 in these cars is tough...my brakes hold until a little over 2000. What's your rationale for only pressing dtc once?

Op, What was your 60' time? That will tell us if it's mostly your launch that's the issue. With those mods you should definitely be in the 12s. Also have you data logged to see if everything's running well?

[Zebra99]

Car gets boost leak/limp mode randomly under load when WOT. Again, not always.

I know my rear WG rod is ceased (shut/open) I don't know, but I'd assume shut or I wouldn't be able to build boost at all.

I usually hit boost target, but I know there are some other things to look at. My 60' is definitely over 2s so that is already a problem.

I didn't think though that my E93 carried that much of a disadvantage off the dig just because of the extra weight. She moves like a train once I get going.

As for DTC...one touch or two lol, seems like there are mixed feelings here.

[JC335xi]

Originally Posted by sickem

Launching around 2500 in these cars is tough...my brakes hold until a little over 2000. What's your rationale for only pressing dtc once?

Op, What was your 60' time? That will tell us if it's mostly your launch that's the issue. With those mods you should definitely be in the 12s. Also have you data logged to see if everything's running well?

Unless your brakes are shot you just aren't pressing down on the brake pedal hard enough if you can't brake torque over 2k.

[cn555ic]

Put the top down for added weight in the fears for traction! Lol. Probably wont let you but if you can it would be nice!

[sickem]

Originally Posted by JC335xi

Unless your brakes are shot you just aren't pressing down on the brake pedal hard enough if you can't brake torque over 2k.

That's a good point. Brakes are pretty new...I'll try agin when I go this week.

[tmo24]

Take out all the extra crap in the car/trunk to make sure you aren't carrying around extra dead weight. Also, don't race on a full tank to save weight. Then again with traction issues, you might actually just want more weight in the back haha

[BQTuning]

Honestly, if you have problems harnesting the power of your car at its current stage, then adding more power will just be futile.

I have ran with JB4 cars on the drag strip running Map 5 and 7 and they were hitting mid-high 12s

Save yourself the agony and put some more practice in on the track before increasing power if your goal is to break 12s.

[skinrock]

Originally Posted by Zebra99

As for DTC...one touch or two lol, seems like there are mixed feelings here.

From what I understand, pushing it once (aka DTC) will be less forgiving in regards to wheel slip, i.e. hard launches won't cut power to the wheels, but will still retain lateral corrections, e.g. oversteer/understeer.

Holding it for a few seconds (there is no two touch, touching it twice briefly will just go into DTC mode and then back to full DSC mode) will turn everything off. Basically it won't interfere with traction loss or slip at all.

I think the general consensus is that touching it once, DTC, is good if you want more control over hard launches.

http://www.e90post.com/forums/showpo...8&postcount=21

[Zebra99]

Here's the end results.
- I need a driver mod (more practice)
-need better tires; something stickier. ( on 19" wheels with RFT's)
-need to log and send to Terry (some hesitation post shift)

To recap:
- 2008 335i E93 MT - FBO
-best runs we're with traction control completely off. Felt I was getting better runs this way; dunno....

Best time on 94 octane (1/4 tank)
- Map 5 adapted

R/T: 0.724
60': 2.390
330: 6.069
1/8: 9.063
MPH: 82.88
1000: 11.577
1/4: 13.695
MPH: 105.54

Best time on 110 octane (1/4 tank unleaded) - Map 7 unadapted

R/T: 0.410
60': 2.259
330: 5.950
1/8: 8.914
MPH: 84.01
1000: 11.387
1/4: 13.484
MPH: 107.10

Got lots of work before I hit 12's, but I know I can do it

Any comments on these runs; keep in mind it's a convertible

[Dr. G]

Originally Posted by tmo24

Take out all the extra crap in the car/trunk to make sure you aren't carrying around extra dead weight. Also, don't race on a full tank to save weight. Then again with traction issues, you might actually just want more weight in the back haha

For my car more gas actually helps with the launch haha, but a vert should run 1/4 tank.

Originally Posted by skinrock

From what I understand, pushing it once (aka DTC) will be less forgiving in regards to wheel slip, i.e. hard launches won't cut power to the wheels, but will still retain lateral corrections, e.g. oversteer/understeer.

Holding it for a few seconds (there is no two touch, touching it twice briefly will just go into DTC mode and then back to full DSC mode) will turn everything off. Basically it won't interfere with traction loss or slip at all.

I think the general consensus is that touching it once, DTC, is good if you want more control over hard launches.

http://www.e90post.com/forums/showpo...8&postcount=21

Yup spot on. Another thing is the car's rear end isn't all too stable at higher speeds under hard acceleration so having some of the nannies still on is a good idea for those who aren't too comfortable/experienced with controlling a car under those conditions.

Originally Posted by Zebra99

Here's the end results.
- I need a driver mod (more practice)
-need better tires; something stickier. ( on 19" wheels with RFT's)
-need to log and send to Terry (some hesitation post shift)

To recap:
- 2008 335i E93 MT - FBO
-best runs we're with traction control completely off. Felt I was getting better runs this way; dunno....

Best time on 94 octane (1/4 tank)

R/T: 0.724
60': 2.390
330: 6.069
1/8: 9.063
MPH: 82.88
1000: 11.577
1/4: 13.695
MPH: 105.54

Best time on 110 octane (1/4 tank)

R/T: 0.410
60': 2.259
330: 5.950
1/8: 8.914
MPH: 84.01
1000: 11.387
1/4: 13.484
MPH: 107.10

Got lots of work before I hit 12's, but I know I can do it

Any comments on these runs; keep in mind it's a convertible

I get better times with traction fully off as well since I do get some minor intervention with DTC just pressed once.

Launching an MT is harder than AT so I'm not sure if your 60' times are lower than the standard for RFT's, but just practice launching it while you drive around, let it rip from the lights and get off the gas as soon as you cross the intersection haha. It'll help you find that sweet spot so you're ready to rumble next time at the track.

One thing somebody once recommended to me and said it worked wonders for him was to shift into 2nd as soon as you catch decent traction regardless of the rpm you are at.

Trap speeds look a bit low so look at the logs to see what's going on.

[bigdnno98]

Originally Posted by Zebra99

Here's the end results.
- I need a driver mod (more practice)
-need better tires; something stickier. ( on 19" wheels with RFT's)
-need to log and send to Terry (some hesitation post shift)

To recap:
- 2008 335i E93 MT - FBO
-best runs we're with traction control completely off. Felt I was getting better runs this way; dunno....

Best time on 94 octane (1/4 tank)

R/T: 0.724
60': 2.390
330: 6.069
1/8: 9.063
MPH: 82.88
1000: 11.577
1/4: 13.695
MPH: 105.54

Best time on 110 octane (1/4 tank)

R/T: 0.410
60': 2.259
330: 5.950
1/8: 8.914
MPH: 84.01
1000: 11.387
1/4: 13.484
MPH: 107.10

Got lots of work before I hit 12's, but I know I can do it

Any comments on these runs; keep in mind it's a convertible

60' is killing you. If you can get it down to 1.8 (my best so far) that'll help a lot. Also get rid of those run flats. Your traps seem low for race gas. What map did you run? We're you able tort the tune adapt before the passes? Also I would stay away from 110 leaded fuel. Bad for o2 sensors. With better tires you'll get better 60' which will get you in the high 12s.

[Zebra99]

I edited initial end post.

I have to try with DTC pressed once only and get in some more launch practice.

Map 5 with the 94 I ran for 2wks so I did plenty of adaption.

The Map 7 with 110 was unadapted as I just went straight into my 3 runs with it. Definitely help me consistently pull lower 13's, but I'm sure it could have been better with more runs.

Tires slipped way too much in first, but again, more practice needed.

I'll be better prepared next year. I'll try and log soon and pass that on to Terry, but I know after shift I had hesitation which caused Lowe ET and MPH.

[Dr. G]

Did you do a couple 3rd gear WOT pulls during those weeks?

Also are you doing a burnout on the RFT's?

[ragingpanda]

What was the DA and temperature/humidity at the track? I know you have a convertible, but I was expecting a better ET and MPH despite you having RFT's. Logs would tell more for sure.

[Randomaccess335]

2.3 60' ........ First make sure your in 1st. Gear not reverse

For every tenth you save on your 60 you ca subtract 2 tenths off ur 1/4 mile time if everything else is the same.
The 60' time is killing you
Practice launches, quick shifting, turn DTC off all the way.
If you spin/break loose on ur launch badly you might as well let off the gas cause your run is finished in regards to a good time.
Slip the clutch off the line giving gas without spinning the tires and find your sweet spot ........ U'll be good to go

[Zebra99]

I thought R was for race lol...at least that's what the commentator said haha

I did 3rd gear pulls on Map 5 and car was pulling hard, but 60' is killing me. All I need is a bit more practice.

Never had a car with this much power and this much weight lol.

My MPH should be a high 12 though no? Especially if I were to get sub 2s 60'

[bigdnno98]

Yeah you can def pull high 12s with your traps and a 1.8 60'. When I get race gas at the track I put the race gas in the tank then leave the track and drive a couple miles to let it get through the fuel system and let the tune adapt.