Track forum general chit chat.

roastbeef · 12-16-2019, 06:38 AM

that zebulon wing looks like its movable fore and aft. neat.

PrimeBMW · 12-16-2019, 08:36 AM

Quote:

Originally Posted by kpewpew

Fun weekend, still rendering new Thunderhill East bypass PB video. Finally a sub-2 minute lap, previously did a 2:00.066, did a 1:59.29 today. Fun trying to keep up with fsmtnbiker - check out this lil wing vs big wing comparison!

Cracked a wheel going to deep inside turn 8. There's a nasty drop inside. Oops

Good job!
I had a few friends (AR Motorsports) down there supporting a car in the 25 hours of Thunderhill. It was an absolute mud fest. Literally mud across the entire track in places. So I'm not surprised you found a few holes off track.
The AR car finished P2 in ES with zero mechanicals.

fsmtnbiker · 12-16-2019, 09:00 AM

Quote:

Originally Posted by kpewpew

Cracked a wheel going to deep inside turn 8. There's a nasty drop inside. Oops

Ouch!!! I saw the dropoff there on the inside on 8 after you mentioned it. That was no bueno. Guess it’s a good thing you swapped out the tires after that session. Good thing Apex has their discounted replacement wheel program!

kyippee · 12-16-2019, 12:55 PM

Quote:

Originally Posted by PrimeBMW

Good job!
I had a few friends (AR Motorsports) down there supporting a car in the 25 hours of Thunderhill. It was an absolute mud fest. Literally mud across the entire track in places. So I'm not surprised you found a few holes off track.
The AR car finished P2 in ES with zero mechanicals.

Yea, I was talking with Chris/fsmtnbiker about some odd spots! Coming up to the bypass, there was an odd spot of dirt that looked normal but when you run over it, it produces a clunk like a legit bump in the road. That stuff was really pressed onto the road! Congrats to your friends / the AR team!

Quote:

Originally Posted by fsmtnbiker

Ouch!!! I saw the dropoff there on the inside on 8 after you mentioned it. That was no bueno. Guess it’s a good thing you swapped out the tires after that session. Good thing Apex has their discounted replacement wheel program!

I'll see how it works... already replaced the initial full set of 4 wheels when I developed minor bends in the past. I read that you can only replace a set once? I might start looking at Titan 7 (again), Bimmerworld forged wheels, Apex forged wheels, or just replacing the single cracked wheel.

Thanks for sharing some of your experience with the E92 M3 platform. I might have to look into the cooling airfow improvements you mentioned. This past weekend was good with my coolant temps only maxing out at 195F, but it was ice cold out!

M3 Number 86 · 12-16-2019, 05:26 PM

Quote:

Originally Posted by stripclubdj

Quote:

Originally Posted by m3 number 86

Quote:

Originally Posted by grip addict

anyone know of any tracks that have some borrow-able arrive and drive e92 m3s? And rates?

i think warp in here does have a club at road atlanta and his car is available.

offer your car

one million dollars

kyippee · 12-17-2019, 12:02 PM

Footage from the incident fsmtnbiker and I saw/experienced. I sat out this session due to a tire puncture and cracked wheel.

Ximian · 12-17-2019, 01:06 PM

Quote:

Originally Posted by kpewpew

Footage from the incident fsmtnbiker and I saw/experienced. I sat out this session due to a tire puncture and cracked wheel.

So the McLaren noticed smoke ahead, down a hill where he couldn't see the whole situation or if the track was clear, then thought, "No big deal, send it"?

CorruptCommie · 12-17-2019, 01:57 PM

Quote:

Originally Posted by Ximian

So the McLaren noticed smoke ahead, down a hill where he couldn't see the whole situation or if the track was clear, then thought, "No big deal, send it"?

Then made a 17 minute video about a 5 second clip.

b4hand · 12-17-2019, 02:24 PM

Quote:

Originally Posted by CorruptCommie

Then made a 17 minute video about a 5 second clip.

I want to like the guy but saying steel brakes won't perform as good as ceramics makes me wonder...

CorruptCommie · 12-17-2019, 03:01 PM

Quote:

Originally Posted by b4hand

I want to like the guy but saying steel brakes won't perform as good as ceramics makes me wonder...

But he set a track record? Ceramics would have saved him.

kyippee · 12-17-2019, 03:20 PM

I always assumed carbon-ceramic rotors would perform better in terms of heat capacity / cooling + weight savings, just cost more. Thus, the decision to move to steel rotors is a more cost-effective solution. Is that not true?

Chris_PDX · 12-17-2019, 06:48 PM

Quote:

Originally Posted by kpewpew

I always assumed carbon-ceramic rotors would perform better in terms of heat capacity / cooling + weight savings, just cost more. Thus, the decision to move to steel rotors is a more cost-effective solution. Is that not true?

Even Porsche recommends that people who order ceramics take them off for serious tracking. They perform better than steel as far as heat soaking to a point, but they can still overheat and crack. And at that point, replacing a several hundred dollar steel rotor vs. a several thousand dollar ceramic rotor....

kyippee · 12-17-2019, 06:54 PM

Oh dang. Good to know! So yeah it might perform a bit better in the absolute sense when it's all together.. but extreme use might just prematurely destroy it.. Got it. Not that I'm baller enough to run CCBs, but good info!

Chris_PDX · 12-17-2019, 08:15 PM

I can't find the article now, but I read somewhere an interview with a Porsche engineer that said the ceramics where for people who don't want to deal with brake dust or "regular" service intervals.

roastbeef · 12-17-2019, 08:34 PM

looks like i got a track day on the calendar! i got a private day on 01/24/20 at buttonwillow. super stoked to return! now i have to start prepping the machine.
i have to get my front rotors machined (endless pads left a weird layer on my rotors), and i'm due for a SRF flush.
i also have a set of pirelli dh scrubs to mount.

StripclubDJ · 12-17-2019, 08:36 PM

Quote:

Originally Posted by roastbeef

looks like i got a track day on the calendar! i got a private day on 01/24/20 at buttonwillow. super stoked to return! now i have to start prepping the machine.
i have to get my front rotors machined (endless pads left a weird layer on my rotors), and i'm due for a SRF flush.
i also have a set of pirelli dh scrubs to mount.

Umm

Invite?

roastbeef · 12-17-2019, 08:38 PM

Quote:

Originally Posted by StripclubDJ

Umm

Invite?

might be full. i'll ask.

roastbeef · 12-18-2019, 01:54 AM

Quote:

Originally Posted by kpewpew

Oh dang. Good to know! So yeah it might perform a bit better in the absolute sense when it's all together.. but extreme use might just prematurely destroy it.. Got it. Not that I'm baller enough to run CCBs, but good info!

i don't have any personal experience with this, but i've been told if CCB's are hot and you go off, gravel striking the rotor face can easily chip them and make them worthless.
so, if that is accurate, they are great to an extent, but relatively delicate. its quite common to see people with gt3's at the track with iron rotors- there is a good reason for that. in fact, i think essex sells ap j-hook iron rotors as a direct replacement for the carbon rotors. so when you go to sell the car, swap on the brand new ccb's and put in the appropriate pads and its a new set of brakes like nothing happened.
other than the general benefits of CCB's, they aren't any better "feeling" than iron rotors.

the only ccb experience i have was on an M4 at a mperformance day at thermal. it was oem stuff, but i prefer the feel of my brakes and that is not a biased opinion.

fsmtnbiker · 12-18-2019, 08:26 PM

Quote:

Originally Posted by roastbeef

might be full. i'll ask.

I too would be very interested.

roastbeef · 12-18-2019, 09:57 PM

Quote:

Originally Posted by fsmtnbiker

I too would be very interested.

pm sent.

kyippee · 12-18-2019, 11:03 PM

Can any of you big tire bois help me figure out wheel fitments for fitting 295/30/18 Nankang AR-1 or Toyo RR?

I see APEX has square 18x10.5 ET22. They recommend this offset.
Titan 7 has 18x10.5 ET25. A little less pushed out to the fenders.
Bimmerworld TE:AL has 18x10.5 ET27. Recessed in further..

ET22 vs ET25 - what's the deal? I know fsmtnbiker runs 295/30/18 AR-1 so it should be a tire that fits and doesn't rub. What about the optimal offsets? I want to avoid spacers. I'm running JRZ RS One with hyperco springs, so I should have relatively good clearance with the suspension. I've fit 18x10.5 ET22 square APEX wheels for their forged wheel photoshoot, but it had 275/35/18 R88R tires

Thanks in advance!

fsmtnbiker · 12-19-2019, 12:04 AM

I’ll throw my track wheels back on and see what the inner clearance to the strut is. I’ve been running them at an effective ET24 up front and there’s no issue with clearance inside or out. In the rear I’m effectively ET22 and no issues there either. 22 all around should be no issue at all, same with 25 but I’ll double check the inner clearance up front to be sure.

12-16-2019, 06:38 AM	#10825
roastbeef Lieutenant General 11592 Rep 12,736 Posts Drives: E92 M3 Join Date: Nov 2010 Location: Orange County, CA iTrader: (4)	that zebulon wing looks like its movable fore and aft. neat. __________________ Instagram; @roastbeefmike
	Appreciate 0 Quote

12-17-2019, 12:02 PM	#10830
kyippee Lieutenant Colonel 1073 Rep 1,617 Posts Drives: E92 M3, Supra MK5, F44 235GC Join Date: Feb 2017 Location: SF Bay Area iTrader: (0)	Footage from the incident fsmtnbiker and I saw/experienced. I sat out this session due to a tire puncture and cracked wheel.
	Appreciate 1 XKxRome0ox1589.00 Quote

12-17-2019, 03:20 PM	#10835
kyippee Lieutenant Colonel 1073 Rep 1,617 Posts Drives: E92 M3, Supra MK5, F44 235GC Join Date: Feb 2017 Location: SF Bay Area iTrader: (0)	I always assumed carbon-ceramic rotors would perform better in terms of heat capacity / cooling + weight savings, just cost more. Thus, the decision to move to steel rotors is a more cost-effective solution. Is that not true?
	Appreciate 0 Quote

12-17-2019, 06:54 PM	#10837
kyippee Lieutenant Colonel 1073 Rep 1,617 Posts Drives: E92 M3, Supra MK5, F44 235GC Join Date: Feb 2017 Location: SF Bay Area iTrader: (0)	Oh dang. Good to know! So yeah it might perform a bit better in the absolute sense when it's all together.. but extreme use might just prematurely destroy it.. Got it. Not that I'm baller enough to run CCBs, but good info!
	Appreciate 0 Quote

12-17-2019, 08:15 PM	#10838
Chris_PDX Lieutenant 337 Rep 407 Posts Drives: E92 M3, E46 M3, NA Miata Join Date: Mar 2015 Location: Portland, OR iTrader: (0) Garage List 2002 BMW M3 [0.00] 2012 BMW M3 Coupe [0.00]	I can't find the article now, but I read somewhere an interview with a Porsche engineer that said the ceramics where for people who don't want to deal with brake dust or "regular" service intervals.
	Appreciate 0 Quote

12-17-2019, 08:34 PM	#10839
roastbeef Lieutenant General 11592 Rep 12,736 Posts Drives: E92 M3 Join Date: Nov 2010 Location: Orange County, CA iTrader: (4)	looks like i got a track day on the calendar! i got a private day on 01/24/20 at buttonwillow. super stoked to return! now i have to start prepping the machine. i have to get my front rotors machined (endless pads left a weird layer on my rotors), and i'm due for a SRF flush. i also have a set of pirelli dh scrubs to mount. __________________ Instagram; @roastbeefmike
	Appreciate 1 StripclubDJ4100.00 Quote

12-18-2019, 11:03 PM	#10845
kyippee Lieutenant Colonel 1073 Rep 1,617 Posts Drives: E92 M3, Supra MK5, F44 235GC Join Date: Feb 2017 Location: SF Bay Area iTrader: (0)	Can any of you big tire bois help me figure out wheel fitments for fitting 295/30/18 Nankang AR-1 or Toyo RR? I see APEX has square 18x10.5 ET22. They recommend this offset. Titan 7 has 18x10.5 ET25. A little less pushed out to the fenders. Bimmerworld TE:AL has 18x10.5 ET27. Recessed in further.. ET22 vs ET25 - what's the deal? I know fsmtnbiker runs 295/30/18 AR-1 so it should be a tire that fits and doesn't rub. What about the optimal offsets? I want to avoid spacers. I'm running JRZ RS One with hyperco springs, so I should have relatively good clearance with the suspension. I've fit 18x10.5 ET22 square APEX wheels for their forged wheel photoshoot, but it had 275/35/18 R88R tires Thanks in advance!
	Appreciate 0 Quote

12-19-2019, 12:04 AM	#10846
fsmtnbiker First Lieutenant 620 Rep 327 Posts Drives: E92 M3, Evora S, E36 Join Date: Jul 2013 Location: Phoenix, AZ iTrader: (0)	I’ll throw my track wheels back on and see what the inner clearance to the strut is. I’ve been running them at an effective ET24 up front and there’s no issue with clearance inside or out. In the rear I’m effectively ET22 and no issues there either. 22 all around should be no issue at all, same with 25 but I’ll double check the inner clearance up front to be sure.
	Appreciate 2 kyippee1073.00 derbo3611.50 Quote