[leftcoastman]

Originally Posted by T Bone

If this is your first track day, do not spend any money on mods..... spend money on events / hotels....you need seat time. Seat time is the best mod.



The XI will push out very hard on track out full throttle, BTW.

I would generally agree with your statement, except the stock tires are super duper expensive. He's generally staying in the same ballpark as long as he's going for super friendly street tires.

I think they're around $300 a pop. For that price, you can get a Kosei and a Falken Azenis and not destroy your street tires.

[Ramos]

Cool!! Kosei 17x8.5 it is then..

Still not sure about the tire size I should go with.. I am kinda worried about the rollover you mentioned.. It is the closest aspect ration and circumference to stock than 235 or 245 though

[T Bone]

Originally Posted by leftcoastman

I would generally agree with your statement, except the stock tires are super duper expensive. He's generally staying in the same ballpark as long as he's going for super friendly street tires.

I think they're around $300 a pop. For that price, you can get a Kosei and a Falken Azenis and not destroy your street tires.

Fair enough...always good to have dedicated track shoes for the car


I wouldn't touch the suspension until he gets use to the car. If he is just starting out, there is 20%-25% more performance for fixing the nut behind the wheel.... And that mod is permanent.

[leftcoastman]

Originally Posted by T Bone

Fair enough...always good to have dedicated track shoes for the car


I wouldn't touch the suspension until he gets use to the car. If he is just starting out, there is 20%-25% more performance for fixing the nut behind the wheel.... And that mod is permanent.

You're wrong.

On a 2 minute course, r-compounds are worth 2 seconds, maybe.

On a 2 minute course, the difference between a great driver and a beginner in the same car is probably at least 15 seconds.

But you're right. Keep tightening that nut and the dividends will be far greater.

[T Bone]

Originally Posted by leftcoastman

On a 2 minute course, r-compounds are worth 2 seconds, maybe.

What courses? R compounds in my experience add much more.

[leftcoastman]

Originally Posted by T Bone

What courses? R compounds in my experience add much more.

Miller outer track.

We can argue to a gnat's ass, but the point is that you are right, working on the nut is better than throwing money to compensate.

[T Bone]

Originally Posted by leftcoastman

Miller outer track.

We can argue to a gnat's ass, but the point is that you are right, working on the nut is better than throwing money to compensate.

OK let's just agree then

[Dascamel]

+1 on cheap tires/cheap light rims for the track.

[jgalaxy]

Some mighty good tips. The nut behind the wheel certainly needs some tightening. It was surprising to see what the car would do in the hands of an instructor. Where I slid around the track, he drove around the track. But the car certainly does need some adjustment. Before I drop for a rear sway bar, I have to ditch these odd ball 19s.

Anyone know if 17s will clear the brakes on the E92 XI Coupe (sport package if that matters)?

[nicknaz]

Originally Posted by jgalaxy

Where I slid around the track, he drove around the track. But the car certainly does need some adjustment.

Anyone know if 17s will clear the brakes on the E92 XI Coupe (sport package if that matters)?

some 17"s fit for sure.. the OEM style 161 17" wheels fit over 335 brakes.. i think other 17s with similar offset to stock will fit

i think you should adjust your right foot to stop the sliding

[sayemthree]

some 17's should fit. but check with tire rack.

R-comps should be good for 4-6 drconds per minute from tests I've seen.

I have tracked BMWs (and a few VW's, AUdis) since 1994 and never had to do anything other than track tires and sometimes track pads.

Its more about you as the driver learning to balance the car, ease off the brakes, etc then it is to mod the car to fix handling problems. I would spend more money on driver training then mods If I were you.

[leftcoastman]

Originally Posted by sayemthree

R-comps should be good for 4-6 drconds per minute from tests I've seen.

Woah! Maybe my 2 seconds for a 2 minute lap was an underestimate, but there is NO way that you can gain 8-12 seconds on a 2 minute lap from Rcomps. If that were the case, a 335i stock with Rcomps would run the same lap times as a 911 GT3 (since it comes with Pilot Sport Cups)

http://www.motortrend.com/features/1...onclusion.html

Note the run-flat shod 335i is exactly 10 seconds slower than the Porsche 911 GT3 with its stock Pilot Sport Cups (r-comp). So if I stuck Rcomps on my stock 335i, I could keep up with a GT3 on its Rcomps?!?! woohooo!

[sayemthree]

Originally Posted by leftcoastman

Woah! Maybe my 2 seconds for a 2 minute lap was an underestimate, but there is NO way that you can gain 8-12 seconds on a 2 minute lap from Rcomps. If that were the case, a 335i stock with Rcomps would run the same lap times as a 911 GT3 (since it comes with Pilot Sport Cups)

http://www.motortrend.com/features/1...onclusion.html

Note the run-flat shod 335i is exactly 10 seconds slower than the Porsche 911 GT3 with its stock Pilot Sport Cups (r-comp). So if I stuck Rcomps on my stock 335i, I could keep up with a GT3 on its Rcomps?!?! woohooo!

Car and Driver did a tst years ago. with the same car - with R tires the times were at leas t4 sec on a one minute course. I admit times will vary according to car, track and conditions. but of all the mods, tires will make the biggest difference.

[T Bone]

Originally Posted by leftcoastman

Woah! Maybe my 2 seconds for a 2 minute lap was an underestimate, but there is NO way that you can gain 8-12 seconds on a 2 minute lap from Rcomps. If that were the case, a 335i stock with Rcomps would run the same lap times as a 911 GT3 (since it comes with Pilot Sport Cups)

The differences really depend on the track. Tight tracks really benefit more from R compounds.

Originally Posted by jgalaxy

Some mighty good tips. The nut behind the wheel certainly needs some tightening. It was surprising to see what the car would do in the hands of an instructor. Where I slid around the track, he drove around the track. But the car certainly does need some adjustment. Before I drop for a rear sway bar, I have to ditch these odd ball 19s.

Anyone know if 17s will clear the brakes on the E92 XI Coupe (sport package if that matters)?

Other than tires and wheels, I would seriously get more seat time before you play around with it. Having an XI, the car really understeers and when you apply the throttle, the car wants to straighten out aggressively.

I have almost lost it on freeway onramps because the car wants to go straight into the barrier....

[Bubbles]

There are very few here (myself included) that can "out drive" this car on the track.

Kosei's 17s are my new daily driving rims, you should see the looks I get.

[leftcoastman]

Originally Posted by Bubbles

There are very few here (myself included) that can "out drive" this car on the track.

Kosei's 17s are my new daily driving rims, you should see the looks I get.

Really? They are ugly as sin, lol. I wear a paper bag on my head on the track mainly because of these rims. Some people wear nomex under their helmet, I wear a paper bag!

Be careful, too. I hear they like to crack if you beat em up too bad - eg potholes. I inspect mine after every track day. But hell, at $165 a pop, I can afford to replace em.

[Ramos]

Why are you driving around in these? The 17's look way too small for this car..
We are all talking about using them on the track not for daily use

[leftcoastman]

Originally Posted by Ramos

Why are you driving around in these? The 17's look way too small for this car..
We are all talking about using them on the track not for daily use

Hey, don't knock on it. I am considering getting some 17 inch chrome spinners for street duty. That would be phat.

[Ramos]

Hahaha.... Too funny..

[fast_lap28]

I am sure some would disagree.....but my track wheel/tire setup proved itself at Road Atlanta the past weekend. I really didn't thnk I would tell any difference from the stock setup but I'm glad I was WRONG! and for the price I paid for everything I couldn't be happier with my upgrades.

Wheels: Rota SVN
Tires: RE01R

Wow! they performed amazingly and they look great to me on both track/street.....I get people asking me, "why are your wheels SO dirty?"

I just smile

[Bubbles]

Originally Posted by leftcoastman

Really? They are ugly as sin, lol. I wear a paper bag on my head on the track mainly because of these rims. Some people wear nomex under their helmet, I wear a paper bag!

Be careful, too. I hear they like to crack if you beat em up too bad - eg potholes. I inspect mine after every track day. But hell, at $165 a pop, I can afford to replace em.

Actually, I am running the wheels now because my other wheels are on the way back to the vendor. I love the double-take looks I get
Several people have asked me if my "real" wheels were stolen.
I am taking them off tonight, but I will miss that 17inch plush ride.

Originally Posted by Ramos

Why are you driving around in these? The 17's look way too small for this car..
We are all talking about using them on the track not for daily use

Just kidding, (although the ride is great) they were a temporary solution to a recent wheel debacle and I did not feel like throwing the OEM rims back on.

Originally Posted by leftcoastman

Hey, don't knock on it. I am considering getting some 17 inch chrome spinners for street duty. That would be phat.

Just make sure the wheels are "fake" spinners, I don't want you going "high class" on me.

[Bubbles]

Originally Posted by fast_lap28

I am sure some would disagree.....but my track wheel/tire setup proved itself at Road Atlanta the past weekend. I really didn't thnk I would tell any difference from the stock setup but I'm glad I was WRONG! and for the price I paid for everything I couldn't be happier with my upgrades.

Wheels: Rota SVN
Tires: RE01R

Wow! they performed amazingly and they look great to me on both track/street.....I get people asking me, "why are your wheels SO dirty?"

I just smile

Those are nice looking wheels.