Track forum general chit chat

[RugbyBro]

Originally Posted by SYT_Shadow

BK doesn't have a F82 one?

Not on their website from what I've seen. I've looked periodically I've the last year and have never seen a F82 compatible one from them

Maybe they'd make one if there was enough demand

[melanthius]

Originally Posted by D_SheerDrivingPleasure

How are your high temp boots and seals working out?

Can you recommend a DIY to help me assess whether to outsource it?

Just have 3 track days on them. I mean it is not something you can really feel, and I am pretty sure they held up fine so far. I felt like it was worth it for peace of mind as my car was purchased used at 32k miles, and already has around 55k miles or something and a few track days on original seals. I know as I get more used to this car these brakes are going to be toast soon enough.

I paid a shop to do it, as my garage is too small and I will take a very long time to do stuff like this. The shop was fine but there was a bit of an air bubble that I had to bleed out. Led to some very long pedal travel and sponge feeling until it was worked out. I think this stuff takes a lot of patience mainly.

Originally Posted by SYT_Shadow

You may want to go way down on bump for the street.

I drive my 3WR MCS at 0 high and low speed compression. I don't touch rebound

First of all I'm far from being "dialed in" on the street, I may very well take out more compression gradually for street driving but I'm not in a rush and it's quite comfortable at my current settings.

I think my track settings are feeling pretty good so far, but I keep slowly adding rebound because I haven't found a downside to doing so yet at least on the tracks I've been on since getting MCS.

I'm not sure why you wouldn't touch rebound, it makes a massive difference in comfort and street handling, and is super easy to do. I find it depends quite a lot on which particular roads I drive on around me. Some places are great with a stiffer setup, other places I'm crashing down every time I hit a little bump in the road. I am also the type of person that really likes messing with settings constantly until I find exactly what I like, so if you ask me in a few weeks I'll have a different answer

[SYT_Shadow]

Originally Posted by RugbyBro

Not on their website from what I've seen. I've looked periodically I've the last year and have never seen a F82 compatible one from them

Maybe they'd make one if there was enough demand

Give them a call. Their website is obsolete to say the least

[uncle ben]

I’m trying to decide on where to put money towards modifications to make my car more track worthy. When wheels and tires come up I feel like I could use some help.

Some people are running a 18” square setup 275’s, what’s the main advantage of a square setup? Aren’t you lacking rear traction? How does this effect mdm?

Currently running 265/285 on stock 19” wheels.

[SYT_Shadow]

Originally Posted by uncle ben

I’m trying to decide on where to put money towards modifications to make my car more track worthy. When wheels and tires come up I feel like I could use some help.

Some people are running a 18” square setup 275’s, what’s the main advantage of a square setup? Aren’t you lacking rear traction? How does this effect mdm?

Currently running 265/285 on stock 19” wheels.

no really good reason to run anything other than 18x10.5 ET36 or ET40. If you have CCB, then the same setup but in 19".
A square setup that allows you to rotate wheels and 10.5 is a wide enough wheel to take any tire that fits in the car

On a front engine rear drive car, your issue really lies up front as those tires do most of the braking and turning and carry over 50% of the weight of the car. In comparison, your rear tires are on holidays.

The M4 GT4 runs square 11" wheels. These don't easily fit in an F8X that's more or less stock, but square 10.5 fits perfectly

The main advantage of square setups is front and rear tires wear differently, so being able to rotate them around allows you to get the most life out of them. Another is it reduces error/complexity when ordering and mounting tires/wheels, as everything is the same.

[uncle ben]

Originally Posted by SYT_Shadow

no really good reason to run anything other than 18x10.5 ET36 or ET40. If you have CCB, then the same setup but in 19".
A square setup that allows you to rotate wheels and 10.5 is a wide enough wheel to take any tire that fits in the car

On a front engine rear drive car, your issue really lies up front as those tires do most of the braking and turning and carry over 50% of the weight of the car. In comparison, your rear tires are on holidays.

The M4 GT4 runs square 11" wheels. These don't easily fit in an F8X that's more or less stock, but square 10.5 fits perfectly

The main advantage of square setups is front and rear tires wear differently, so being able to rotate them around allows you to get the most life out of them. Another is it reduces error/complexity when ordering and mounting tires/wheels, as everything is the same.

I can see where a 10.5 tire would be ideal in the front if you can only fit a 275. But I find the rear of the car can be tail happy with all the power and torque. Wouldn’t it be better to run a wider rear tire than a 275?

[SYT_Shadow]

Originally Posted by uncle ben

I can see where a 10.5 tire would be ideal in the front if you can only fit a 275. But I find the rear of the car can be tail happy with all the power and torque. Wouldn’t it be better to run a wider rear tire than a 275?

With the 10.5 you can fit 295/30. The 10.5 wheel takes lots of tires. 275 is on the narrow side, but of course works well.

The M3 has some power and torque, but not in amounts that make the rear tires an issue. The tires that get beat up most in a F8X M are the fronts, not the rears.

[uncle ben]

Originally Posted by SYT_Shadow

With the 10.5 you can fit 295/30. The 10.5 wheel takes lots of tires. 275 is on the narrow side, but of course works well.

The M3 has some power and torque, but not in amounts that make the rear tires an issue. The tires that get beat up most in a F8X M are the fronts, not the rears.

Maybe because I’m running a 200tw tire and not a stickier tire, I find my traction control light goes on quite a bit on corner exit.

But you are correct about the fronts, after two track days my fronts are demolished maybe it was because I was overdriving the fronts, but it didn’t seem so on the track, no understeering or push, kept my pressure at 34 hot. Hopefully some camber will help.

[SYT_Shadow]

Originally Posted by uncle ben

Maybe because I’m running a 200tw tire and not a stickier tire, I find my traction control light goes on quite a bit on corner exit.

But you are correct about the fronts, after two track days my fronts are demolished maybe it was because I was overdriving the fronts, but it didn’t seem so on the track, no understeering or push, kept my pressure at 34 hot. Hopefully some camber will help.

The traction control in a M car is not designed to stay on and allow high performance. It will have to go off.

That said, the traction control light turning on does not say much. Most of the time the car is cutting power to avoid a spin. No matter what width and what compound, you cannot just pummel the throttle exiting a corner, although I bet you can use the same amount of throttle you're using now with the system disabled and not spin it

Camber will help a lot

[uncle ben]

Originally Posted by SYT_Shadow

The traction control in a M car is not designed to stay on and allow high performance. It will have to go off.

That said, the traction control light turning on does not say much. Most of the time the car is cutting power to avoid a spin. No matter what width and what compound, you cannot just pummel the throttle exiting a corner, although I bet you can use the same amount of throttle you're using now with the system disabled and not spin it

Camber will help a lot

I just recently became brave enough to take off traction control. I assumed every time the light came on it was stopping the rears from spinning. Good to know that I don’t need to run a 305 to be faster.

[D_SheerDrivingPleasure]

shadow, how much time do you think you'd gain at WGI by increasing to a 305 rear?

[SYT_Shadow]

Originally Posted by D_SheerDrivingPleasure

shadow, how much time do you think you'd gain at WGI by increasing to a 305 rear?

None unless I could run the 305 square, and I can't fit that. I have zero interest in just increasing rear grip, the issue is up front.

The 2:02.5 theoreticals are frequent in a session but getting through traffic without losing that is really hard... and highly frustrating. It would be really nice to drop from 2:04s but we'll see if the cars can deliver.

Next year the cars will be different, so there's just one more event at the Glen to try to drop from 2:04

[heyyouduh]

Originally Posted by SYT_Shadow

no really good reason to run anything other than 18x10.5 ET36 or ET40. If you have CCB, then the same setup but in 19".
A square setup that allows you to rotate wheels and 10.5 is a wide enough wheel to take any tire that fits in the car

On a front engine rear drive car, your issue really lies up front as those tires do most of the braking and turning and carry over 50% of the weight of the car. In comparison, your rear tires are on holidays.

The M4 GT4 runs square 11" wheels. These don't easily fit in an F8X that's more or less stock, but square 10.5 fits perfectly

The main advantage of square setups is front and rear tires wear differently, so being able to rotate them around allows you to get the most life out of them. Another is it reduces error/complexity when ordering and mounting tires/wheels, as everything is the same.

I'm on the fence of purchasing a set of wheels that are 10.5 et37 square (currently on 18x10 square), rears will be fine but I'm a little shy about running a large (by my estimate 17-20mm spacer) up front even though people have obviously run large spacers without issues. I feel like it's just like adding another variable that can potentially fail.

I plan on running 275/35 given availability of tires, tire choices, cost etc. and I'm not really sure going from 18x10 to 18x10.5 to "fill out" 275 tires is worth the potential pain of dealing w/ large spacers, fitment, etc.

[SYT_Shadow]

Originally Posted by heyyouduh

I'm on the fence of purchasing a set of wheels that are 10.5 et37 square (currently on 18x10 square), rears will be fine but I'm a little shy about running a large (by my estimate 17-20mm spacer) up front even though people have obviously run large spacers without issues. I feel like it's just like adding another variable that can potentially fail.

I plan on running 275/35 given availability of tires, tire choices, cost etc. and I'm not really sure going from 18x10 to 18x10.5 to "fill out" 275 tires is worth the potential pain of dealing w/ large spacers, fitment, etc.

With a F8X you need to run a spacer up front to run square, there's no way around it.

With a 275 tire you only need a 12mm spacer. If you want to run something really wide you'll want 15mm.
Remember OEM M4 GT4 runs a 25mm spacer up front, the M2 CS Racing runs 41mm...

[heyyouduh]

Originally Posted by SYT_Shadow

With a F8X you need to run a spacer up front to run square, there's no way around it.

With a 275 tire you only need a 12mm spacer. If you want to run something really wide you'll want 15mm.
Remember OEM M4 GT4 runs a 25mm spacer up front, the M2 CS Racing runs 41mm...

hmm, interesting. From forum searching seems like you'd need a thicker spacer than 12mm (effectively 10.5 et 25) to run 275s (running hankook rs4, which run slightly wide). if all you need is a 12mm spacer I'd be more likely to jump to 10.5 squared. I'll dig around more and see.

[SYT_Shadow]

Originally Posted by heyyouduh

hmm, interesting. From forum searching seems like you'd need a thicker spacer than 12mm (effectively 10.5 et 25) to run 275s (running hankook rs4, which run slightly wide). if all you need is a 12mm spacer I'd be more likely to jump to 10.5 squared. I'll dig around more and see.

I have that on my car now, it's a 12mm spacer but I switch to 15mm for 295 Hoosiers

[heyyouduh]

Originally Posted by SYT_Shadow

I have that on my car now, it's a 12mm spacer but I switch to 15mm for 295 Hoosiers

oh cool, good to know. iirc you're running MCS set up in front as well, right, r u running a shorter spring w/o helpers for additional clearance?

[SYT_Shadow]

Originally Posted by heyyouduh

oh cool, good to know. iirc you're running MCS set up in front as well, right, r u running a shorter spring w/o helpers for additional clearance?

I'm running MCS with the typical front spring, 5". I removed the helpers when trying to fit a 11" up front but couldn't pull it off

[sly1types]

Originally Posted by SYT_Shadow

None unless I could run the 305 square, and I can't fit that. I have zero interest in just increasing rear grip, the issue is up front.

The 2:02.5 theoreticals are frequent in a session but getting through traffic without losing that is really hard... and highly frustrating. It would be really nice to drop from 2:04s but we'll see if the cars can deliver.

Next year the cars will be different, so there's just one more event at the Glen to try to drop from 2:04

What about pirelli dh? I was thinking you said 305/645/18 would fit?

I'm getting ready to try it on 10.5" with an effective ET17 for the front then 11" et44 rear then run 305/645/18 front and rear pirelli dh scrubs

[heyyouduh]

Originally Posted by SYT_Shadow

I'm running MCS with the typical front spring, 5". I removed the helpers when trying to fit a 11" up front but couldn't pull it off

gotcha. how much camber? I'm running -2.5 deg camber, mcs 600# 6" w/ helper springs, perch is about half way in the threaded portion of the strut body.

[melanthius]

Keep in mind, Model S plaid puts down 1000hp with like 255 front / 295 in the rear (AWD).

Part of that is far superior traction control than what is possible with an internal combustion engine, but good to put tires in perspective. You don't need 325s on an F80...

Last time I was at the track I sat in some proper E46 M3 race cars, they were running exact same NT01 275/35/18's that I was running.

[SYT_Shadow]

Originally Posted by melanthius

Keep in mind, Model S plaid puts down 1000hp with like 255 front / 295 in the rear (AWD).

Part of that is far superior traction control than what is possible with an internal combustion engine, but good to put tires in perspective. You don't need 325s on an F80...

Last time I was at the track I sat in some proper E46 M3 race cars, they were running exact same NT01 275/35/18's that I was running.

If the e46s were proper race cars they weighed around 2650, quite different than 3600