Track forum general chit chat.

[1FastSicilian]

Originally Posted by slcook54

I’m also on Ohlins dedicated track from 3DM (685/1000). Full bimmerworld aero. Car is exhibiting a lot of mid corner understeer. Dampers set 6 clicks from full stiff. I think I’m going to stiffen the rear bar, it’s currently on the middle setting and contemplating moving to a slightly softer front spring.

I'm on the same suspension and I'm 6 from full stiff in the front and 8 from full stiff in the rear but on OEM rear sway. I haven't noticed any mid corner understeer.,

I do feel the rear of the car feel a little unsettling sometimes and I think I have to the subframe mounts and other bushings back there soon. I'll report back after my next track day in several weeks.

[slcook54]

Originally Posted by 1FastSicilian

I'm on the same suspension and I'm 6 from full stiff in the front and 8 from full stiff in the rear but on OEM rear sway. I haven't noticed any mid corner understeer.,

I do feel the rear of the car feel a little unsettling sometimes and I think I have to the subframe mounts and other bushings back there soon. I'll report back after my next track day in several weeks.

What aero are you on? Pretty sure this has at least something to do with it. 😀

[omgzirra_exe]

Originally Posted by slcook54

I’m also on Ohlins dedicated track from 3DM (685/1000). Full bimmerworld aero. Car is exhibiting a lot of mid corner understeer. Dampers set 6 clicks from full stiff. I think I’m going to stiffen the rear bar, it’s currently on the middle setting and contemplating moving to a slightly softer front spring.

Originally Posted by 1FastSicilian

I'm on the same suspension and I'm 6 from full stiff in the front and 8 from full stiff in the rear but on OEM rear sway. I haven't noticed any mid corner understeer.,

I do feel the rear of the car feel a little unsettling sometimes and I think I have to the subframe mounts and other bushings back there soon. I'll report back after my next track day in several weeks.

this is actually my current battle, 6 clicks from stiff front and 9 clicks from stiff rear.

OEM sways, spl arms, solid rear subframe..

maybe my tire pressures are not where they should be.

I should raise the car a bit more upfront and correct the rake a bit.

again also experiencing the same mid-corner understeer towards exit.

no aero.

[1FastSicilian]

Originally Posted by slcook54

What aero are you on? Pretty sure this has at least something to do with it. 😀

No aero here…


Yeahhhh that might have a little something to do with it lol

[1FastSicilian]

Question for you guys, whats your measurements for ride height?? From ground to fender in the rear 1/4, I’m at 25 1/4 inches.

Running 275/35/18 on 18x10 TE37s

[Gossypiboma]

Originally Posted by 1FastSicilian

Question for you guys, whats your measurements for ride height?? From ground to fender in the rear 1/4, I’m at 25 1/4 inches.

Running 275/35/18 on 18x10 TE37s

Completely subjective, but If your tucking tire like that there is a good chance you're too low.

[omgzirra_exe]

Originally Posted by 1FastSicilian

Question for you guys, whats your measurements for ride height?? From ground to fender in the rear 1/4, I’m at 25 1/4 inches.

Running 275/35/18 on 18x10 TE37s

lil lower than you upfront lol.

[leftfootbr8king]

Originally Posted by 1FastSicilian

Question for you guys, whats your measurements for ride height?? From ground to fender in the rear 1/4, I’m at 25 1/4 inches.

Running 275/35/18 on 18x10 TE37s

Is this a ride height question for track? I’m assuming it is because it’s in the track chit chat thread.

[spooni]

First time @ Buttonwillow 3/31. Ended up with a 1:57.90 pretty happy with that! Car easily has 55 in it. RE71RS is the god mode tire. Will never run anything else going forward.

Maybe I shouldn’t sell it

[1FastSicilian]

Originally Posted by leftfootbr8king

Is this a ride height question for track? I’m assuming it is because it’s in the track chit chat thread.

yes, just curious where everyone has their car set .

[1FastSicilian]

Originally Posted by Gossypiboma

Completely subjective, but If your tucking tire like that there is a good chance you're too low.

I'm actually not tucking tire. Up front I'm able to put 1 finger on top of the tire and in the rear it sits right on top of the tire.

Originally Posted by omgzirra_exe

lil lower than you upfront lol.

Yes, you're definitely lower.

here's a better angle of how my car sits up front.. (one pic was with a 10mm spacer which I took out and replaced with 5mm to clear the ohlins)

[omgzirra_exe]

Originally Posted by 1FastSicilian

I'm actually not tucking tire. Up front I'm able to put 1 finger on top of the tire and in the rear it sits right on top of the tire.



Yes, you're definitely lower.

here's a better angle of how my car sits up front.. (one pic was with a 10mm spacer which I took out and replaced with 5mm to clear the ohlins)

yeah I am using 18x10.5 et15 squared. usually my ride height is a lot taller upfront when I'm on the 285 square but i was testing a 265/35 up front for the last 7 months and i kind of like it.

lil bit more tire 'pre-load' as they would call it, reducing flex and compliance so the turn in a bit more responsive. although sucks everywhere else if it's bumpy lol.

although the 265 is why i can get away with the ride height, but the rake is def off, so im going to raise it up again.

[1FastSicilian]

Originally Posted by omgzirra_exe

yeah I am using 18x10.5 et15 squared. usually my ride height is a lot taller upfront when I'm on the 285 square but i was testing a 265/35 up front for the last 7 months and i kind of like it.

lil bit more tire 'pre-load' as they would call it, reducing flex and compliance so the turn in a bit more responsive. although sucks everywhere else if it's bumpy lol.

although the 265 is why i can get away with the ride height, but the rake is def off, so im going to raise it up again.

265 on a 10.5 has a nice little pull on the sidewall assuming it's a 200tw tire.

I did 265 on a 10 and it was perfect.. The 275 is definitely beefy but I'm diggin' the look right now.

[omgzirra_exe]

Originally Posted by 1FastSicilian

265 on a 10.5 has a nice little pull on the sidewall assuming it's a 200tw tire.

I did 265 on a 10 and it was perfect.. The 275 is definitely beefy but I'm diggin' the look right now.

yeah its not bad, its 140tw tire. the stretch / fit is pretty decent.

might need to turn up the brightness a bit depending on our screen / viewing platform, but you can see how its just enough stretch, but not insane.

[1FastSicilian]

Originally Posted by omgzirra_exe

yeah its not bad, its 140tw tire. the stretch / fit is pretty decent.

might need to turn up the brightness a bit depending on our screen / viewing platform, but you can see how its just enough stretch, but not insane.

man, the concavity of the 10.5 is stunning..

[spxxx]

Originally Posted by Bimmer Barney

Car looks great! How good is the BW splitter? My GT4 rep needs replacing after only a year of driveway and road scraping and track days. Does it look like it will be substantially better at weathering abuse than the much cheaper POM options? It looks awesome but it ain’t inexpensive.

Of it's next level, proper motorsport design with a solid core. Wish I upgraded sooner but couldn't justify it since my GT4 lip was free. The BW splitter has already taken a big off and just dug up some mud without any visible damage. Only issue is the rubbing on longer sweepers. Want to install some skid pucks on the edges but I'm scared to drill it for rivnut haha.

[chocstraw]

do you guys even have bump stops anymore ? lol

I found with my KWs and STs that the manual's recommended settings were best. Their R&D is probably better than our conjectures. They usually suggest rake too, which your car doesn't appear to have, Sicilian.

Low cars stress me tf out

[Bartledoo]

First track day for the C8…need to set up the gopro for in-car footy.

[Ximian]

Originally Posted by Bartledoo

First track day for the C8…need to set up the gopro for in-car footy.

Nice lap, you can pick up your trophy here - https://www.amazon.com/dp/B07B3VQ8DY

[Bartledoo]

Originally Posted by Ximian

Nice lap, you can pick up your trophy here - https://www.amazon.com/dp/B07B3VQ8DY

I got them when I entered the wait list for the car

[tsk94]

Originally Posted by Bartledoo

First track day for the C8…need to set up the gopro for in-car footy.

That seems like a good time for stock tires, relative to what your E90 was doing. Sounds like it has lots of potential.

How is it to drive?!

[spxxx]

Originally Posted by Bartledoo

First track day for the C8…need to set up the gopro for in-car footy.

https://youtu.be/a_ctrskgzO8

How do your lap times compare to the E9X?