Track forum general chit chat.

[Bartledoo]

Originally Posted by //steve\\

I really need to try driving the car some more with everything off. My car is Euro MDM coded and it does let you drive pretty hard. I'm wondering if some of the weirdness I've felt out of the rear of the car isn't actually the car stepping in.

Will you always get some kind of light on the cluster when the car is stepping in or will it reel you in a bit without it being obvious?

It doesn't always light up when it's doing work. It does a little brake tap dance that will make the car feel strange and twitchy on long turns, which will immediately be noticeable on those same turns when you stop using it.

Originally Posted by aututto

Yep! I definitely was significantly quicker with it off. It took a second to build the confidence up on exits. But you soon realize the MDM was really ruining your cornering abilities. I only had issues of slight oversteer on turns I leave in 2nd gear. Otherwise plenty stable, and faster!

The 2nd gear corners are awesome. You can very easily learn to steer on exit with no steering input in this car.

[//steve\\]

Think it might cause any kind of rebound jacking effect? or that's just a suspension issue?

[Bartledoo]

Originally Posted by bigjae1976

E9X M3 traction control at any level makes the car slower. Period. MDM, Euro MDM...I can drive a faster and cleaner lap without the nannies.

One area where the E9X M3 is much better than the E46 M3 is suspension design. When you apply throttle, weight shifts rearwards and squats. As the rear suspension compresses there is an increase of toe in. This makes the rear end want to straighten up. Combined with a decent LSD which provides a lot of lock up (although too slow)...it is hard to spin the car.

The E46 M3 does the opposite. It toes out so if you get sideways, you need more opposite lock and much more precision on the throttle. It find it pretty easy to spin my E46 M3.

The E90 M3 with DSC off. Doesn't want to go around but wants to go off on the inside.

Lol you've been saying the E9X increases rear toe-in under squat for years now, but the toe-in actually reduces under squat. Malek even responded to you in one of those many posts back in 2012 to correct you.

There are like a hundred posts saying it toes in now lmao.

[M3MPH1S]

Originally Posted by //steve\\

I really need to try driving the car some more with everything off. My car is Euro MDM coded and it does let you drive pretty hard. I'm wondering if some of the weirdness I've felt out of the rear of the car isn't actually the car stepping in.

Will you always get some kind of light on the cluster when the car is stepping in or will it reel you in a bit without it being obvious?

Not always. I believe it was Dogbone who did extensive data logging and learned that it was intervening way more often than expected. To BMW's credit, at least they did a good job of not over-correcting or making it super obvious, but to other people's point it adds up when you turn everything off.

[M3MPH1S]

Originally Posted by rhyary

Does anyone here bother to clean the disk holes from the pads material?
.

Quarantine boredom hit you very hard I see

[rhyary]

Originally Posted by M3MPH1S

Quarantine boredom hit you very hard I see

I like holes to be holes

[Bimmer Barney]

I miss track days ☹️

[Richbot]

The E46 has to have that rear geometry to turn at all in stock form. PUSHY-LOOSE was a term that if not coined by drivers of that car, certainly finally made it into Webster's Unabridged Vehicle Dynamics Dictionary bceause of the E46M

[Ximian]

Originally Posted by rhyary

I like holes to be holes

It helps cooling when you've got pads that make a lot of dust. I do it a few times a day if there's an air compressor accessible at the track.

[Richbot]

PLEASE DON'T USE COMPRESSED AIR TO BLOW OUT YOUR BRAKES

thanks, your lungs and the lungs of those around you

[Ximian]

Originally Posted by Richbot

PLEASE DON'T USE COMPRESSED AIR TO BLOW OUT YOUR BRAKES

thanks, your lungs and the lungs of those around you

There's not an easier and quicker way to clean the holes. Just be sensible and don't do it around other people.

I wear a mask, stay upwind, and stand above the car as much as I can so dust isn't an issue.

[PrimeBMW]

Originally Posted by rhyary

I like holes to be holes

What pads are you using? I've never noticed that issue with Cobalt Friction pads.

[Kelse92]

Well I was overdue for an alignment... lol

Pervious camber settings were -3.3 front and -2.5 rear...

Contributing factors: Raised ride height pretty significantly (10mm) on all four corners a couple weeks ago & bumpy autocross parking lots, oh and forgot I had a bit of a bumpy off-track ride in January lol

[dparm]

LG Motorsports adjustable sway bars and heim joint endlinks are in, along with prototype SPL toe link lockout plates (already have their rear toe links). Anxious to get on track and see how this feels.

Still have my eyes on their coilover conversion kit which actually isn't too bad at $2600 + install. Custom-tuned Bilstein shocks, adjustable, and Hyperco springs.

[Hoosier_M3]

Originally Posted by dparm

LG Motorsports adjustable sway bars and heim joint endlinks are in, along with prototype SPL toe link lockout plates (already have their rear toe links). Anxious to get on track and see how this feels.

Still have my eyes on their coilover conversion kit which actually isn't too bad at $2600 + install. Custom-tuned Bilstein shocks, adjustable, and Hyperco springs.

I absolutely love these cars. So much capability for the $$$ and it seems like the parts are pretty fairly priced.

I might have missed an old thread (please point me towards it if there is one), but do you have more pics of this?

[dparm]

Originally Posted by Hoosier_M3

I absolutely love these cars. So much capability for the $$$ and it seems like the parts are pretty fairly priced.

I might have missed an old thread (please point me towards it if there is one), but do you have more pics of this?

Pics of what, the LG coilover kit? Look on their website. It’s what Lou ran on all of his C5 and C6 Pirelli World Challenge / American Le Mans Series / Trans Am cars.

On the LG YouTube channel, he bolted a fucking 6x6 block to the concrete and drove over it 6 times to torture test the suspension. Cracked the wheel and destroyed the fender liner, but the shocks were fine and didn’t even bottom out. It’s a serious piece of kit.

Originally Posted by Kelse92

Well I was overdue for an alignment... lol

Pervious camber settings were -3.3 front and -2.5 rear...

Contributing factors: Raised ride height pretty significantly (10mm) on all four corners a couple weeks ago & bumpy autocross parking lots, oh and forgot I had a bit of a bumpy off-track ride in January lol

Yeah, that looks like it had an incident. Not horrible and if the tire wear is still in-check then I guess the worst thing you can say is the handling may not have been “perfect”. What did your final alignment and corner balancing look like?

[roastbeef]

i'd be curious how big of a difference a coil conversion would be on a corvette... and how much would it effect front tire clearance like coils sometimes do in the e9x.

[dparm]

Originally Posted by roastbeef

i'd be curious how big of a difference a coil conversion would be on a corvette... and how much would it effect front tire clearance like coils sometimes do in the e9x.

There are zero clearance issues. The shocks sit at a pretty severe angle.

The cool thing is that you remove the composite leaf springs entirely which saves 20+ pounds.

[WhiteM3EMC]

Originally Posted by Kelse92

Well I was overdue for an alignment... lol

Pervious camber settings were -3.3 front and -2.5 rear...

Contributing factors: Raised ride height pretty significantly (10mm) on all four corners a couple weeks ago & bumpy autocross parking lots, oh and forgot I had a bit of a bumpy off-track ride in January lol

What have you done to your suspension? I'm completely stock suspension besides camber plates. They were able to get -2 degrees on the rears when I had stock subframe bushings, then I took it back after the subframe and diff bushing conversion and they could get -2.5 out of one wheel, but the max they could get on the other wheel was -1.5. so I'm at -1.5 on both rear wheels, would like to jump that back up to around -2 or so

[Kelse92]

Originally Posted by WhiteM3EMC

What have you done to your suspension? I'm completely stock suspension besides camber plates. They were able to get -2 degrees on the rears when I had stock subframe bushings, then I took it back after the subframe and diff bushing conversion and they could get -2.5 out of one wheel, but the max they could get on the other wheel was -1.5. so I'm at -1.5 on both rear wheels, would like to jump that back up to around -2 or so

Suspension wise KW Clubsports, front swaybar, stock everything else. Leaning towards something back there being bent or worn out.

Originally Posted by dparm

Yeah, that looks like it had an incident. Not horrible and if the tire wear is still in-check then I guess the worst thing you can say is the handling may not have been “perfect”. What did your final alignment and corner balancing look like?

I think so too, it’s been punished quite a bit the last few months lol
Tire wear has been really good all things considered! Handling lately... terrible, now I know why. Don’t have the final alignment on hand but it’s -3.5 camber up front, -2.1/-2.5 out back. Toe is just at factory specs. Corner balance is good too, finally got this heavy thing down to 3450lbs and 50% on the cross weight. Didn’t need too much adjusting there.

[WhiteM3EMC]

Originally Posted by Kelse92

Suspension wise KW Clubsports, front swaybar, stock everything else. Leaning towards something back there being bent or worn out.



I think so too, it’s been punished quite a bit the last few months lol
Tire wear has been really good all things considered! Handling lately... terrible, now I know why. Don’t have the final alignment on hand but it’s -3.5 camber up front, -2.1/-2.5 out back. Toe is just at factory specs. Corner balance is good too, finally got this heavy thing down to 3450lbs and 50% on the cross weight. Didn’t need too much adjusting there.

Yeah. Something bent or worn would make sense, but, I figured they'd have brought that to my attention when I picked the car up. Who knows

[Hoosier_M3]

Originally Posted by dparm

Pics of what, the LG coilover kit? Look on their website. It’s what Lou ran on all of his C5 and C6 Pirelli World Challenge / American Le Mans Series / Trans Am cars.

On the LG YouTube channel, he bolted a fucking 6x6 block to the concrete and drove over it 6 times to torture test the suspension. Cracked the wheel and destroyed the fender liner, but the shocks were fine and didn’t even bottom out. It’s a serious piece of kit.





Yeah, that looks like it had an incident. Not horrible and if the tire wear is still in-check then I guess the worst thing you can say is the handling may not have been “perfect”. What did your final alignment and corner balancing look like?

Your car haha. I actually wanted to get a C6 Z years ago and remember watching his videos. Absolutely wild....