|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Today's Posts | Search |
|
BMW 3-Series (E90 E92) Forum
>
questions about tire for track days
|
|
04-06-2008, 02:27 AM | #1 |
New Member
1
Rep 15
Posts |
questions about tire for track days
hi, guys, I am newbie to tracking/racing and i would like to ask couple of questions:
1) I noticed that my stock rft-tire are getting worn after each track day (i've been 2 times on a track). On one hane i would love to keep using them on a street and use appropriate race tire a track. But on another hand I heard that it's better for newbies to learn driving techniques without good race tires and light rims so that newbies feel car limits better and can push car on its limit with not-perfect equipment. And then once they switch to race tires/rims they will feel real difference. Without that they may even do not notice difference. Is this valid point? 2) Once I buy new set of tires/rims is it better to keep old rft for street driving and use race tires/rims for a track ? If so where to change tires/rims on a track or day before track and drive to track on race tires ? Last edited by deve; 04-06-2008 at 12:34 PM.. |
04-06-2008, 09:27 AM | #2 |
Major
50
Rep 1,137
Posts |
Street tires are designed to be more forgiving. They grip less and signal their impending break-away. Race tires grip more but give away less forgivingly. IMHO it is much better to learn on street tires. As a beginner, and unless you are truly a prodigy, the reality is that the car is not what is limiting your speed. For most of us, the loose nut behind the wheel is the problem...
Until you become an advanced-intermediate driver I would not even begin to consider switching. While you will go faster if you do, it will not be because you are improving as a driver. But hey...those are just my opinions. YMMV.
__________________
2010 Evo X - silver with a big, stupid wing on the back
2009 VW CC - Black/Black - with a 2011 328i on order to replace it - ED 8/1/11 |
Appreciate
0
|
04-06-2008, 11:37 AM | #3 |
Lieutenant Colonel
48
Rep 1,664
Posts |
+1
After 3 track days, the car is not the limiting factor. Although a cheaper/lighter tire setup would make sense, rft are fairly expensive.
__________________
2008 E92 M3 Jerez Black,DCT,Fox Red ext,Prem,Tech,19", ipod/usb, CF roof and trim
2010 E91 328i Space Gray,Black int, M sport, most options 2007 Montego Blue 335i (retired) |
Appreciate
0
|
04-06-2008, 01:42 PM | #4 |
Lieutenant Colonel
52
Rep 1,714
Posts |
+1
Stick to street tires. They bitch/scream when they're about to lose grip. R-comps will gripgripgrip then release without warning. Rcomps also hide your mistakes as I learned recently when I went back to street tires. If you want, get a set of Kosei K1, put cheap summer tires on them and then when you get better, you can stick race rubber on the same wheels. Those RFTs, while pretty decent on track, are expensive to replace. |
Appreciate
0
|
04-07-2008, 03:24 AM | #5 | |
New Member
1
Rep 15
Posts |
yes, my concern was that I am wasting my stock rft tires. maybe i should go for cheap summer tire and use them for track days only.
Given that What summer would you recommend ? Quote:
|
|
Appreciate
0
|
04-07-2008, 06:30 AM | #6 | |
Banned
22
Rep 337
Posts |
Quote:
Have Fun! Mark "Feff" Pfeffer www.MVPTrackTime.com |
|
Appreciate
0
|
04-07-2008, 08:55 AM | #7 |
Brigadier General
431
Rep 4,380
Posts
Drives: 2014 Audi A4 / 91 Track Miata
Join Date: Jan 2007
Location: San Jose, CA
|
BTW guys...race tires are something all together different. There are REAL race tires...then R compounds..then street tires. I personally would consider getting a slightly more R compound-like street tire...like the RE-01R...if I was the OP.
__________________
Car is now gone .... :-( |
Appreciate
0
|
04-08-2008, 07:51 PM | #8 |
Private First Class
2
Rep 119
Posts |
The advice on the street tires is dead on as a learning tool.
These cars eat the outside tread on the front as there is little if any negative camber. They will likely destroy R compunds quickly. Although the car is good on the track, I gave up using it due to the tire issue and the cost of rotors, and bought a Z06. Faster cheaper.
__________________
335i coupe, pss9s, F1 GD3 C5 Z06 |
Appreciate
0
|
04-08-2008, 10:25 PM | #9 | |
Lieutenant Colonel
52
Rep 1,714
Posts |
Quote:
The camber issue can be solved with <$500 camber plates and the rotors are free from BMW! You just gotta buy race pads because the OEM overheat badly on track. But the stock rotors paired with race pads are sublime. Granted, the driver clearly sucked, but I looooved flying by a guy in a C6 Z06. It was, of course, in the corners. |
|
Appreciate
0
|
04-08-2008, 11:21 PM | #10 | |
General
355
Rep 18,218
Posts |
Quote:
|
|
Appreciate
0
|
04-09-2008, 08:46 AM | #11 |
Fast Like Tiger
13
Rep 372
Posts |
Yup. I've passed both of those, 997t's, and a Ford GT. All driver difference of course.
To the OP, I lean a little more towards S4to335's school of thought. Assuming that you've had some instruction during your first couple of events and you're getting less and less feedback about needing to be smoother and more consistent, I'd get a tire closer to an R-compound with tread (don't get something you have to shave or heat cycle.)
__________________
-Hegemony
Pics |
Appreciate
0
|
04-09-2008, 09:23 AM | #12 |
Brigadier General
674
Rep 4,080
Posts |
I've passed a 996, then we both got passed by a Mazda 3
I'm using the K1/street tire route. Altogether it's cheaper then a new set of runflats. There's a pretty decent selection of track oriented street tires out there for that size rim. |
Appreciate
0
|
04-09-2008, 11:22 AM | #13 |
Colonel
101
Rep 2,317
Posts |
I'd definately suggest sticking with street tires for the time being. That being said you don't need to eat up your regular expensive tires on the track. I have 2 sets of street tires. One for track days and one for regular use. My track tires are NOT runflats (too expensive and too slippery) but are regular street tires. I usually change wheels and tires a week or so before an event and leave them until I have time to change back. I have just a regular floor jack and a torque wrench. It take me about 1/2 hour to switch out all 4 tires. It definately saves me money in the long run!
And a GREAT place to fine the new wheels is on this forum! Lots of people are trying to get rid of their stock wheels and tires when they upgrade! You can get them pretty cheap! Then when you are ready going to an "R" compound tire is just a new set of tires whenever the track tires need to be replaced. Good luck! |
Appreciate
0
|
04-12-2008, 10:06 AM | #14 | |
Private First Class
2
Rep 119
Posts |
Quote:
The rotors are free within certain mileage parameters. I have a C5 Z06-entry to exit times are comparable to my 335. That surprised me because the Vette feels more balanced. So much for the buttdyno. If you passed a C6 it was because he wasn't trying.
__________________
335i coupe, pss9s, F1 GD3 C5 Z06 |
|
Appreciate
0
|
04-12-2008, 11:29 AM | #15 |
General
355
Rep 18,218
Posts |
Its because of driver skill. I said earlier that I passed a GT3, which no stock 335 should do. But I sure did feel special for a minute
__________________
|
Appreciate
0
|
04-13-2008, 11:46 AM | #17 |
Private First Class
2
Rep 119
Posts |
When I used the RFTs, I used the recommended pressure for high speed on the doorpanel. I found that the tires were not overly sensitive to changes in pressure. These were 19"s-it might be a different story with 18"s
__________________
335i coupe, pss9s, F1 GD3 C5 Z06 |
Appreciate
0
|
04-13-2008, 12:40 PM | #18 |
The Law.
301
Rep 14,283
Posts |
on the stock runflats. I set them at 35psi cold all the way around and adjusted accordingly after i got on the track.
|
Appreciate
0
|
04-13-2008, 02:05 PM | #19 |
Lieutenant Colonel
52
Rep 1,714
Posts |
For the stock RFT, I had to pump the fronts up to 47psi hot, for two reasons:
1) Dial out some understeer. 2) Keep it from rolling all the way over and scrubbing off the "bridgestone" lettering! |
Appreciate
0
|
Bookmarks |
|
|