[ember.m4]

Originally Posted by Blk5er33

I've been tracking my car and it never tells to me to service it like you describe. Can you elaborate on how this is possible. My car just tells me that it's time for service once a year. Also, you mentioned you're running -2.8 camber - is this on the street also? I had -3 in the front earlier this year, with some toe in, but it corded the very inner part of the front tires. Maybe with 0 toe, that won't happen. I went down to -2.25 with slight toe out for DD and 1 weekend per month track use.

It's part of CBS. The car adjusts the recommended service intervals depending on how hard you drive it. I did an oil change, and then took the car to 3 track days in the next week, and it read 5,000 mi until next service afterwards, even though I'd barely driven in terms of miles.

If it's not changing for you, either you're not pushing the car very hard, or you're not going to the track frequently enough to notice the change.

[Blk5er33]

Originally Posted by ember.m4

It's part of CBS. The car adjusts the recommended service intervals depending on how hard you drive it. I did an oil change, and then took the car to 3 track days in the next week, and it read 5,000 mi until next service afterwards, even though I'd barely driven in terms of miles.

If it's not changing for you, either you're not pushing the car very hard, or you're not going to the track frequently enough to notice the change.

Very interesting, I've never read this before on the forums.

[D_SheerDrivingPleasure]

The forum's new standard for speed is how quickly your car's computer recommendes an oil change. Lap times and max bench press are so gen F8X.

[Cmassey3]

Is PFC working on bringing the 08 and 11 compounds to the G8X platform? It seems like the main options at the moment are Pagid, Hawk, and Carbotech.

[Ximian]

Anyone try slicks yet?

The winter set of wheels has 275/35/19s tires on it that need to be replaced so I might try slicks for a weekend. Pirelli DH 275/675/19 should fit if my source can get them.

[PDOT]

I was wonder have any of you guys had any luck getting brake pressure data? Via obd-2?

Only way I know of is tapping into the can-bus with a solo2.

[rafaeldelrey]

Does any of the data loggers get brake pedal position, throttle position, steering angle, brake disc temperature or wheel temperature, tire pressure?
Maybe one of those who tap into can bus.

[kolosy]

Originally Posted by rafaeldelrey

Does any of the data loggers get brake pedal position, throttle position, steering angle, brake disc temperature or wheel temperature, tire pressure?
Maybe one of those who tap into can bus.

AiM Solo 2 DL. Yes, you need a CAN bus tap.

[rafaeldelrey]

Originally Posted by kolosy

AiM Solo 2 DL. Yes, you need a CAN bus tap.

I have used AIM MXL tem years ago in my Lancer Evolution X. It was pretty neat. I ve read a PDF about the AIM solo on the M3 and.M4, but it is confusing. It is supposed to be a manual for the G80 and G82, but they mention F Series.
I ll take a look. Thank you.

[BackOnBlack]

This may help with setup: https://www.youtube.com/@trailbrakedata

Matt is very helpful and knowledgeable, he answers questions quickly, particulalrly on AIM setups.

[PDOT]

Originally Posted by rafaeldelrey

I have used AIM MXL tem years ago in my Lancer Evolution X. It was pretty neat. I ve read a PDF about the AIM solo on the M3 and.M4, but it is confusing. It is supposed to be a manual for the G80 and G82, but they mention F Series.
I ll take a look. Thank you.

I was told it’s the same for F and G series. I was just wondering if there was something that was plug and play.

[randomserious]

can i fit a track wheelset (305/295) in the back seats/trunk? i have a passenger up front.

(in my G20 i was able to fit 2x 255 on each rear seat)

[BackOnBlack]

Originally Posted by PDOT

I was told it’s the same for F and G series. I was just wondering if there was something that was plug and play.

As long as you have the right wire splitter or adapter, nearly all will read the data. You just have to configure it properly.

For example, Vbox has a CAN bus ODB adapter. I haven't tried it yet, but it basically connects to ODB, has a slightly different wiring for ground, low and high voltage pins, and gets the CAN bus data from the ODB port. Similar re-wiring has been done by some users of ODBLink CX or MX+ wireless ODB adapters, which are then able to read CAN bus data. You can find this information in their forums.

This may also help: https://g80.bimmerpost.com/forums/sh....php?t=1959139

[m4ml]

Originally Posted by randomserious

can i fit a track wheelset (305/295) in the back seats/trunk? i have a passenger up front.

(in my G20 i was able to fit 2x 255 on each rear seat)

G80 or G82?

[randomserious]

Originally Posted by m4ml

G80 or G82?

G80

[D_SheerDrivingPleasure]

Originally Posted by randomserious

can i fit a track wheelset (305/295) in the back seats/trunk? i have a passenger up front.

(in my G20 i was able to fit 2x 255 on each rear seat)

I bet you can fit all 4 on the rear seats. In an F80 you can fit a set of 295/30/18s with room to spare. I assume your set is 19" so you'll need to slide your seat forward a bit more.

[CJ421]

I had a great time at SCCA Track Night yesterday on NJMP Lighting, 3x 20 min sessions. The car was stock, including the brake fluid. I took ~2psi off the Pirelli PZeros and followed BMW M's YouTube videos on prepping the car (removing carbon bucket headrest so your helmet fits, removing brake duct guards, setting up Track mode, etc.).

The last time I was on track was Monticello with BMW M School last year, so I didn't go all out. Didn't ABS brake much and I didn't wind it out on the straights.

I did my first session with MDM and then used DSC off/M traction control at 8 and then 7 in the other sessions. I could tell the car helped me sometimes, but it was gradual and not intrusive.

I wanted to see what the car could do stock and am giving it a 10/10 rating for fun factor + driveability. I didn't intend for this to be a frequent track car, but I might get some brake fluid and do another track night.

Charles

[lutfy]

Hey folks,

New to the chassis (G87 here) but not to BMWs or tracking. After 7 years of competitive TT/racing a Toyota 86 am leaning on running the G87 in Mid Atlantic and North East NASA events.

First track outing at Summit Point, the car ran 1:20.6 which is exceptionally quick (stock tires/brakes).

I felt uncomfortable running stock pads hitting close to 150MPH on the short straight hence was not getting the most out of the car.

Since them (March), will be doing the following this month prior to Watkins Glen:

1) Running 295/30/19 Continental ExtremeContact Force 200TW tire. Reasoning, NASA gives a 1.6 credit for running these tires which means running other 200TW tires such as AD09 or other longer life tires would mean taking a 40whp haircut.

2) Obtained 19X10.5 wheels! ET15

3) Bled the brakes running Redline RL600

4) Will be installing Ground Control camber plates and Eibach springs.

5) GLock track pads

6) Need to dyno the car for compliance.

In my Toyota 86 (NA 195whp) the car would run 2:08 flat at Watkins Glen and VIR (idential times), 1:27.5 at NJMP TBolt (1:12.7 at Lightning), 1:21.5 at Summit in TT5/ST5 trim.

This car will be in TT3 and also SCCA Sport 1 class and I expect a ~4 secs quicker on faster tracks like VIR/WGI and 1-2 secs quicker on slower tighter courses (at least from running it stock at Summit).

Last time out, won Sport 1 class (not many competitors but ahead of a well driven GT4).

QUESTION:

1) Reading through the suspension components, most of the nuts/bolts are TTY (torque to y8ield) and used only once.

I intend to change the top hats for the spring install on the front and it will also require removing the swaybar end link, anyone has parts list for these and torque spec or did you all reuse the bolts/nuts for any suspension install?

I want to do it properly but also do not want to be too conservative if this is a non issue.

TIA and look forward to meeting you all in person.

Cheers!

Lutfy

[BackOnBlack]

Originally Posted by lutfy

First track outing at Summit Point, the car ran 1:20.6 which is exceptionally quick (stock tires/brakes).

Since them (March), will be doing the following this month prior to Watkins Glen:

1) Running 295/30/19 Continental ExtremeContact Force 200TW tire. Reasoning, NASA gives a 1.6 credit for running these tires which means running other 200TW tires such as AD09 or other longer life tires would mean taking a 40whp haircut.

2) Obtained 19X10.5 wheels! ET15

3) Bled the brakes running Redline RL600

4) Will be installing Ground Control camber plates and Eibach springs.

5) GLock track pads

6) Need to dyno the car for compliance.

Running 1:20.6 is truly exceptional at SPM, stock or otherwise. I know many of the highly modified F87s cannot run that time without r-comps. So, there is the driver factor without a doubt

This brings up another question in my mind, actually two: What gains one should expect per $$$ spent? I would venture to guess that the very mild modifications you are doing to the G87 cost roughly $5K at this point, assuming you are doing all of the work yourself. I imagine you will be able to run at least 2 seconds faster at the SPM, 1 sec gain just coming from the tires or may be more. The front wheel width increase along with the camber plates, I assume should net another 1 sec. at least. There may even be another 0.5-1.0 sec gained just because your confidence will be higher with the brake setup. Dipping into 17s would be astonishing, that is PCA BGP territory.

Stock car + 8% worth of upgrades = 2-2.5 secs in lap times. Achieving that at that cost is a great deal I think At the Glen and VIR, lap times might cut as much as 4-5 secs. Cannot wait to find out frankly.

For comparison purposes: GRM spent 28% in mods to their 2019 Miata MX project car, and documented a nearly 11 sec improvement in lap times.

[Cmassey3]

How are xDrive cars holding up to track use? My mind tells me to seek out RWD, but the CS is limited to AWD and seems to be more available than the CSL plus no pesky matte paint.

[lutfy]

Originally Posted by BackOnBlack

Running 1:20.6 is truly exceptional at SPM, stock or otherwise. I know many of the highly modified F87s cannot run that time without r-comps. So, there is the driver factor without a doubt

This brings up another question in my mind, actually two: What gains one should expect per $$$ spent? I would venture to guess that the very mild modifications you are doing to the G87 cost roughly $5K at this point, assuming you are doing all of the work yourself. I imagine you will be able to run at least 2 seconds faster at the SPM, 1 sec gain just coming from the tires or may be more. The front wheel width increase along with the camber plates, I assume should net another 1 sec. at least. There may even be another 0.5-1.0 sec gained just because your confidence will be higher with the brake setup. Dipping into 17s would be astonishing, that is PCA BGP territory.

Stock car + 8% worth of upgrades = 2-2.5 secs in lap times. Achieving that at that cost is a great deal I think At the Glen and VIR, lap times might cut as much as 4-5 secs. Cannot wait to find out frankly.

For comparison purposes: GRM spent 28% in mods to their 2019 Miata MX project car, and documented a nearly 11 sec improvement in lap times.

Cheers Bob!

I decided to swap the wheels with another G87 owner. In return will be running OEM wheels with Pirelli PZ4 Start spec once the PS4 wears out. Hence essentially stock tires.

I did not want to run spacers or do the fender liner mod plus I could not run tires wider than 285 to be in class (TT4). Got the dyno compliance paperwork for NASA and will need to add 50lbs to be in class. Should be all set for Summit.

Made 437whp average (heat soaked) on dyno. Generally need to be off track and on the dyno with NASA so tried to run it hot to replicate the result.

Springs and camber plates should be installed soon. Goal is to get up to at least -2.4 camber in the front.

Last time out, the brake pads made me a little less confident so GLOC should do the trick.

If I can dip into the 19s at SPM with just camber/springs/pads, I would be thrilled and it is certainly possible. Was leaving time on the table with braking early and not aggressively; T6, 7 and 8 the car would push if I carried any more speed (needed camber).

To be honest, the chassis is already so balanced, I do not see the need to do much (all relative). This is my fun street car first.

Glen I 'think' it could run 2:05 with that configuration.

At this point, have less than $1K in parts (springs/camber plate) and possibly another (less than) $1K in labor/alignment etc.

Not including consumables (brake pads/tires).

Lutfy

[BackOnBlack]

This sounds like a great plan lutfy

I signed up for November NASA event. They want me to start with HPDE 2, and follow the process, which is okay of course.