[ASBSECU E93]

I'm running M/T drag radials - can confirm they are great.

[Bjc2600]

I will look into the M/T's more, I have heard good things about them and they offer the ability to drive to the track with them on. Any input on Hoosier's if I was going to have them on a set of wheels strictly to put on the rears after arriving at the track?

[32valves]

Originally Posted by Bjc2600

I will look into the M/T's more, I have heard good things about them and they offer the ability to drive to the track with them on. Any input on Hoosier's if I was going to have them on a set of wheels strictly to put on the rears after arriving at the track?

hoosiers has a street/ drag tire also but from what I see and hear from my buddies Mickey Thompson is the way to go for street and drag.

[ASBSECU E93]

I swap mine out at the track - take a small floor jack and it takes 10 minutes.

Life span for M/T's under normal driving is pretty short IIRC.

[BB_cuda]

I've heard stories from a buddy trying to drive home from track on M/T drag radials with light rain and it was very slippery.

[Bjc2600]

Okay thank you for the input, most likely whatever I go with will be used just on the track and swapped onto the car when I get there, planning on 275/40r17, on 17x9 wheels, does anyone know the minimum offset? +26 might be too small?

[32valves]

Originally Posted by Bjc2600

Okay thank you for the input, most likely whatever I go with will be used just on the track and swapped onto the car when I get there, planning on 275/40r17, on 17x9 wheels, does anyone know the minimum offset? +26 might be too small?

I would go at least 30-40mm

[32valves]

Originally Posted by Bjc2600

Okay thank you for the input, most likely whatever I go with will be used just on the track and swapped onto the car when I get there, planning on 275/40r17, on 17x9 wheels, does anyone know the minimum offset? +26 might be too small?

go 35-40mm

[Bjc2600]

35-40 won't cause the wheel/tire to be in to far and run on the strut tower, correct?

[32valves]

Originally Posted by Bjc2600

Okay thank you for the input, most likely whatever I go with will be used just on the track and swapped onto the car when I get there, planning on 275/40r17, on 17x9 wheels, does anyone know the minimum offset? +26 might be too small?

I would go at least 30-40mm

[ASBSECU E93]

I've been looking for a 17x9 bmw style wheel so I can run a wider tire - can you share the style wheel Bjc2600 ?

[335dsleeper]

Originally Posted by BB_cuda

I've heard stories from a buddy trying to drive home from track on M/T drag radials with light rain and it was very slippery.

This can be said about any tire that is worn to or past the wear bars. True DOT tires like the Mickey drag radials I run are very good in the rain. With a 000-100 wear rating, most drag radials wear quickly, which causes many to drive to and from the track on worn tires, which can lead to an increased pucker factor when wet.

There are tons of very high HP cars out there running M/T drag radials everyday without incident.

[Bjc2600]

Originally Posted by ASBSECU E93

I've been looking for a 17x9 bmw style wheel so I can run a wider tire - can you share the style wheel Bjc2600 ?

I found a set of style 32 wheels cheap off a 540i and was going to run hub rings with them, but they are only +26 offset, so prolly going to try and find another option.

[BB_cuda]

Originally Posted by 335dsleeper

This can be said about any tire that is worn to or past the wear bars. True DOT tires like the Mickey drag radials I run as very good in the rain. With a 000-100 wear rating, most drag radials wear quickly, which causes many to drive to and from the track on worn tires, which can lead to an increased pucker factor when wet.

There are tons of very high HP cars out there running M/T drag radials everyday without incident.

Thanks for elaborating this.

[32valves]

Originally Posted by Bjc2600

35-40 won't cause the wheel/tire to be in to far and run on the strut tower, correct?

if I remember right I had a 19x9.5 offset of 40mm, with a 275/30/19. And it was clear inward and outward.

[Hoooper]

Originally Posted by 32valves

if I remember right I had a 19x9.5 offset of 40mm, with a 275/30/19. And it was clear inward and outward.

Im running an 18x9.5 +43 rear with 275/35 r18, no rubbing either side. I wouldnt want to go much more than 5mm more inward or 8-10mm more outward. Around +40 seems to be the spot where you can fit the most tire without rubbing.

BJC if youre reading reviews on wheel width, tires width, and offset, make sure you only make note of LCI cars, pre-LCI cars were ~8mm further in at the wheel mount surface so the wheel offsets are totally different between LCI and pre-LCI.

[Bjc2600]

Originally Posted by Hoooper

Im running an 18x9.5 +43 rear with 275/35 r18, no rubbing either side. I wouldnt want to go much more than 5mm more inward or 8-10mm more outward. Around +40 seems to be the spot where you can fit the most tire without rubbing.

BJC if youre reading reviews on wheel width, tires width, and offset, make sure you only make note of LCI cars, pre-LCI cars were ~8mm further in at the wheel mount surface so the wheel offsets are totally different between LCI and pre-LCI.

Yes, being a 2010 I would be LCI correct? So I should be alright finding some with a 9-9.5 width and a +35 to +43mm offset?

[Got-Torque]

I got a chance to try a few 1/4 mile attempts using the torque app. Numbers I recall were approx. 5.4 sec 0-60 and 13.6-13.8 at about 106-107. How the heck are you guys launching these cars?

11 M-sport with Nitto 555 drag radials. 2.8 tune and required mods to support. No meth yet.

Tire spin causes either brakes or power reduction with traction control on, with it turned off I tried a few 2000 rpm launches and just spun like crazy.

Also, is everyone running in sport mode and letting it shift for you or manual mode? My stage 3 xHP apparently isn't the latest one, so sport mode starts in 1st gear instead of 2nd. If I run in manual mode to start in 2nd, then have to shift manually and wasn't quiet sure what rpm to shift at...

Looking for some advice to get better times, thanks!

[TDIwyse]

Originally Posted by TDIwyse

...
The tracks around here have a couple pre-season openings next month before the main season begins in May...

Well, went to the track yesterday after church. Things are busy and I didn't have the car optimally prepped (didn't have a chance to go over things and I had 3/4 tank of fuel which is more than optimum weight for the track).

This was the first track day for the strips around here. Weather was sub-optimum, but the thunderstorms held off and the track was dry, but the density altitude was bad. ~71F, 56%RH, 28.4 inHg pressure (very low pressure). There was supposed to be a fairly decent tail wind, but it didn't materialize into what was predicted when I was there.

Despite the bad density altitude, the car managed a 119.57 mph pass. Correcting for weather conditions puts it in the ~121-123mph range. I think if I can get a day with decent density altitude it'll break into the 120's for certain, and then I'll be done modifying the car. Probably.

The plan going into the day was to do one pass with a safe launch (no wheel spin), and then get more aggressive with the following launches. As the philosopher Mike Tyson said, "Everyone has a plan until they get punched in the face." :-)

After the first pass things got exciting in a bad way... Actually, it started right at the end of the first pass when the DDE threw a code.

I didn't have my laptop along, and Torque only gave a generic "powertrain" SES. But watching the Torque Track Recorder log, it looked like at the end of the pass the boost/emp behavior changed a little from what I have observed to be "normal".

I tried one more pass with a more aggressive launch, but something was definitely wrong. Threw the same SES code (this time happend before I was 1/2 way down the track), and the EMP and Boost were way lower than they should be, and had much lower power off the line, and only managed a 118.03 mph pass.

I decided the weather wasn't worth trying again, and something was up with the car. I didn't see any issues with the EWG or the connecting piping, so I decided I'd try to do further investigating at home.

I only made it ~1 mile from the track, right before the entrance ramp of the freeway, when the engine sound changed dramatically, EMP went to 0 psig, and I couldn't build boost or maintain speed without smoke... I didn't get on the freeway, but went past it and parked on a gravel road and popped the hood. That was when I saw the EMP sensor banjo bolt was disconnected from the exhaust manifold and BARELY hanging onto the "O" of the pressure connector tubing, and only 1 copper crush washer was left ... items #10 and 11 here: http://www.realoem.com/bmw/enUS/show...diagId=13_1287

If that banjo bolt would've dropped, I don't know what I would've done. The car was not going to be able drive home the way it was... Fortunately, I had a 17mm socket I used for changing wheels at the track, and that's the right size for the banjo bolt... However, there wasn't enough clearance to get the long socket and the 1/2 inch + 3/8 inch adapter to fit in there (all I had was a breaker bar and a torque wrench that were 1/2 inch)... so I got the banjo bolt threaded as best I could, while partially scorching my fingers, and hand tightened with the socket, and gingerly drove the car home. The EMP/Boost/AFR/EGT's were a bit off, and there was some extra exhaust smell in the cab, but it held good enough to make it the ~70 miles home.

I had some extra copper washers at home from the turbo swap, and installed them once the exhaust manifold cooled down and then did a test drive. Behavior was back to normal.

Hopefully, everyone else has a less "exciting" day at the dragstrip than I had.

Edit: This is with Jarek stage 2.5'ish tune, Pro Turbo LP hybrid turbo, EWG, customized downpipe, some custom controlled water/methanol injection and sensor manipulation.

[Built4Sin]

^ wow!

[Got-Torque]

No kidding, that is moving!

[335dsleeper]

That's a great first outing! That sucks about the washer but very glad you were able to get it home and that it was an easy fix!

I look forward to your results with better weather conditions!

Originally Posted by TDIwyse

Well, went to the track yesterday after church. Things are busy and I didn't have the car optimally prepped (didn't have a chance to go over things and I had 3/4 tank of fuel which is more than optimum weight for the track).

This was the first track day for the strips around here. Weather was sub-optimum, but the thunderstorms held off and the track was dry, but the density altitude was bad. ~71F, 56%RH, 28.4 inHg pressure (very low pressure). There was supposed to be a fairly decent tail wind, but it didn't materialize into what was predicted when I was there.

Despite the bad density altitude, the car managed a 119.57 mph pass. Correcting for weather conditions puts it in the ~121-123mph range. I think if I can get a day with decent density altitude it'll break into the 120's for certain, and then I'll be done modifying the car. Probably.

The plan going into the day was to do one pass with a safe launch (no wheel spin), and then get more aggressive with the following launches. As the philosopher Mike Tyson said, "Everyone has a plan until they get punched in the face." :-)

After the first pass things got exciting in a bad way... Actually, it started right at the end of the first pass when the DDE threw a code.

I didn't have my laptop along, and Torque only gave a generic "powertrain" SES. But watching the Torque Track Recorder log, it looked like at the end of the pass the boost/emp behavior changed a little from what I have observed to be "normal".

I tried one more pass with a more aggressive launch, but something was definitely wrong. Threw the same SES code (this time happend before I was 1/2 way down the track), and the EMP and Boost were way lower than they should be, and had much lower power off the line, and only managed a 118.03 mph pass.

I decided the weather wasn't worth trying again, and something was up with the car. I didn't see any issues with the EWG or the connecting piping, so I decided I'd try to do further investigating at home.

I only made it ~1 mile from the track, right before the entrance ramp of the freeway, when the engine sound changed dramatically, EMP went to 0 psig, and I couldn't build boost or maintain speed without smoke... I didn't get on the freeway, but went past it and parked on a gravel road and popped the hood. That was when I saw the EMP sensor banjo bolt was disconnected from the exhaust manifold and BARELY hanging onto the "O" of the pressure connector tubing, and only 1 copper crush washer was left ... items #10 and 11 here: http://www.realoem.com/bmw/enUS/show...diagId=13_1287

If that banjo bolt would've dropped, I don't know what I would've done. The car was not going to be able drive home the way it was... Fortunately, I had a 17mm socket I used for changing wheels at the track, and that's the right size for the banjo bolt... However, there wasn't enough clearance to get the long socket and the 1/2 inch + 3/8 inch adapter to fit in there (all I had was a breaker bar and a torque wrench that were 1/2 inch)... so I got the banjo bolt threaded as best I could, while partially scorching my fingers, and hand tightened with the socket, and gingerly drove the car home. The EMP/Boost/AFR/EGT's were a bit off, and there was some extra exhaust smell in the cab, but it held good enough to make it the ~70 miles home.

I had some extra copper washers at home from the turbo swap, and installed them once the exhaust manifold cooled down and then did a test drive. Behavior was back to normal.

Hopefully, everyone else has a less "exciting" day at the dragstrip than I had.

Edit: This is with Jarek stage 2.5'ish tune, Pro Turbo LP hybrid turbo, EWG, customized downpipe, some custom controlled water/methanol injection and sensor manipulation.