[priitserk]

Man I had a awesome track day at Porsche Ring
Personal best, 1:23.8, previous last year time was 1:26.7. Second fastest BMW through history in this fantastic track!

I'm so happy and I'm sooooooo tired 😀 G forces are so huge that I feel like somebody beat the hell out of me 😀

I'm 2 seconds slower than GT3 and GT3RS's, the ultimate comparison with my G87 track SUV (stock suspension, no aero)

https://youtu.be/kLF6xQrqWBU
https://youtu.be/P2IElof26I8

Couple of issues:

1. No idea why but car becomes very nervous at high speeds (> 170kmh). Front end gets a bit weird, small amount of wobbling left right left right.... no idea what's causing it, but I suspect OEM bushings...

2. I can't get the power down... ended up using TC 6 that allowed me to concentrate on better lines. Anything below lvl 6 was a drift masters challenge.

3. I need better straps and seats...

4. A bit more camber at front would be good... But not sure its possible, Maxed out the camber plates

5. Rear requires more camber, OEM setup is no good anymore... tire wear shows well that a lot must be added

Brilliant day. Im only 2 seconds slower than 250k cars on track 😀 With G87, WTF 😀 😀 😀 😀

But now comes the hard part. I need to decide if I'll go that way and get myself proper coils and a rear wing and some fancy stuff from suspension secrets.

AR-1 is brilliant tire! I truly love it.

[Christian_M387]

Really great, and shows that the stock car isn't bad at all.

I also had my first trackday yesterday at my "Standard" circuit. Completely stock with P-Zero except for the brake fluid.

It was pretty good, but the car is nervous when braking, and I can confirm the traction issues.

I got along pretty well with the TC5. Overall, the car feels a bit spongy at times; that needs to be fixed somehow. Seats are a must; you constantly have to tense up and more or less stay in your seat.

[priitserk]

Originally Posted by Christian_M387

Really great, and shows that the stock car isn't bad at all.

I also had my first trackday yesterday at my "Standard" circuit. Completely stock with P-Zero except for the brake fluid.

It was pretty good, but the car is nervous when braking, and I can confirm the traction issues.

I got along pretty well with the TC5. Overall, the car feels a bit spongy at times; that needs to be fixed somehow. Seats are a must; you constantly have to tense up and more or less stay in your seat.

Seats are indeed a must. I was also having huge trouble 😂

I found an exact kit from suspension secrets site to fix that spongy feel of the car, but the tariffs... its cheaper for me to take a flight to london and fly back than to order the kit... absurd... 3000 euro kit would cost me additionally 800 euros as taxes 🤯

I'll start looking for cheap flights to UK.

Some sources say that we can also adjust rear camber a bit on stock cars. I'll take a look, even a slight change could help with traction. I have next event at 17th May, so probably cant do any major upgrades that fast.

[Christian_M387]

I've already had a wheel alignment done. I'd say there's still some adjustment room in the rear.

In my case, it felt more like the tires with their spongy sidewalls. And probably the stock rubber bushings.

I don't think you necessarily need the €3,000 kit. Replace a few bushings, the springs, or the entire suspension, and it'll be fine.

Do you already have an idea for seats? I still have a set of Pole Position Recaro seats, but I'm a bit hesitant about installing them because of the coding and warranty/approval issues.

[priitserk]

Originally Posted by Christian_M387

I've already had a wheel alignment done. I'd say there's still some adjustment room in the rear.

In my case, it felt more like the tires with their spongy sidewalls. And probably the stock rubber bushings.

I don't think you necessarily need the €3,000 kit. Replace a few bushings, the springs, or the entire suspension, and it'll be fine.

Do you already have an idea for seats? I still have a set of Pole Position Recaro seats, but I'm a bit hesitant about installing them because of the coding and warranty/approval issues.

The thing is that my knowledge on suspension is non existent. I know that there are some rubber stuff but what dows what and even how many and what i need, absolutely no idea 😃

Ive been trying to find new springs, a bit stiffer ones, but again, limited to my experience and no idea what actually would fit and which spring rates I need. Coils would be great but again around 4000 euro expense.

Seats, no idea yet. but that does not seem to be major issue imo, coding yes but in my case warranty is already long gone after femto unlock 🫣 The bigger question is how to conect/install race harnesses without rollcage...

[priitserk]

Added racechrono comparison with prev race. Massive improvements everywhere.

[Christian_M387]

From what I've learned so far, in Germany, H&R springs are slightly stiffer than the stock set. However, this is limited; the spring has to match the damper's characteristics. But I'll try it that way first.

For various uniball mounts, take a look at the vehicle from underneath. Then you'll quickly see what rubber is still in the mount and can be replaced.

Do you have the Race chrono Pro Version? Same Car and config on the same the Day?

[priitserk]

Originally Posted by Christian_M387

From what I've learned so far, in Germany, H&R springs are slightly stiffer than the stock set. However, this is limited; the spring has to match the damper's characteristics. But I'll try it that way first.

For various uniball mounts, take a look at the vehicle from underneath. Then you'll quickly see what rubber is still in the mount and can be replaced.

Do you have the Race chrono Pro Version? Same Car and config on the same the Day?

HR springs - well thats an option but its a risky move as we really dont know how much it lowers the car... im running wide tires and I might need to adjust car height not to hit fenders while braking hard. I have searched for spring that keeps the same ride height or lowers max 2cm but is much firmer, havent really found anything.

Racechrono - yes i have pro version. The diff shows completely bone stock car vs slightly modded (wheel, tires, AF exhaust and ECU tune)

Racechrono requires external gps module... phone has too low Hz rate... you can see how weird the trajectories are 😂 Im not driving like that

[priitserk]

Suspension Secrets just posted me such parts

https://shop.suspensionsecrets.co.uk...rms-bmw-g87-m2

Step by step. I need to catch those GT3 Porsches Im not giving up!

Debating in my head over coilovers. Öhlins RT has a good price. But then I looked at Nitron, which is a bit more expensive but at least by reviews is completely on another level. My budget here is limited to around 6k euros. Still debating... If anyone has good advice, experience, please let me know

[adenjr]

Originally Posted by priitserk

Man I had a awesome track day at Porsche Ring
Personal best, 1:23.8, previous last year time was 1:26.7. Second fastest BMW through history in this fantastic track!

I'm so happy and I'm sooooooo tired 😀 G forces are so huge that I feel like somebody beat the hell out of me 😀

I'm 2 seconds slower than GT3 and GT3RS's, the ultimate comparison with my G87 track SUV (stock suspension, no aero)

Couple of issues:

1. No idea why but car becomes very nervous at high speeds (> 170kmh). Front end gets a bit weird, small amount of wobbling left right left right.... no idea what's causing it, but I suspect OEM bushings...

2. I can't get the power down... ended up using TC 6 that allowed me to concentrate on better lines. Anything below lvl 6 was a drift masters challenge.

3. I need better straps and seats...

4. A bit more camber at front would be good... But not sure its possible, Maxed out the camber plates

5. Rear requires more camber, OEM setup is no good anymore... tire wear shows well that a lot must be added

Brilliant day. Im only 2 seconds slower than 250k cars on track 😀 With G87, WTF 😀 😀 😀 😀

But now comes the hard part. I need to decide if I'll go that way and get myself proper coils and a rear wing and some fancy stuff from suspension secrets.

AR-1 is brilliant tire! I truly love it.

priitserk I see a lot of negative comments from you about the G87 platform on this forum and the G87 FB group, but can't be so bad with those results!

Adding Schroth QuickFit Pro harnesses to the oem carbon buckets was a gamechanger for me.

But i'm at the same crossroads with my build, if I go to full coilovers and lose daily driveability with no edc.

[priitserk]

Originally Posted by adenjr

priitserk I see a lot of negative comments from you about the G87 platform on this forum and the G87 FB group, but can't be so bad with those results!

Adding Schroth QuickFit Pro harnesses to the oem carbon buckets was a gamechanger for me.

But i'm at the same crossroads with my build, if I go to full coilovers and lose daily driveability with no edc.

Out of the box performance imo is too low. I still believe the car is way too heavy and the weight is what is the limiting factor making it truly fast track car. Huge weight also means the consumables are crazy... Im not happy about that. But it is what it is.

About seats - I think i will go with some recaro ultra light seats as I need to get the weight down.

EDC - I think until we can adjust damping without stripping (what was bmw thinking when designing strut tower... camber adjustment is horribly hard...) the full car we will be fine. We will just select track setting with few clicks at the track 🙂

[priitserk]

They arrived! Beatiful 🙂

[priitserk]

First one done. Getting them exactly the same length as OEM arms required some black magic 😂 Will install both of them and then will adjust them 5mm longer tham OEM arms (as SS suggested)

I truly love messing around with my car. After 20y as software engineer I trily love doing some real stuff... My brain rests from everyday corporate bullshit bingo

[priitserk]

Like always, sometimes things go south :facepalm Went to the alignment and the dude said its impossible to get good alignment considering these arms have to be 5mm longer than OEM arms. So, I did unthinkable and just ordered from Suspension Secrets full blown suspension kit. Will change out everything and then we can also get proper alignment done.
Will still go to track this Saturday and will share how new traction arms even with crappy alignment feel. At least my wife who just came home with bimmer asked wtf have you done with the car, it feels different (we managed to dial out -1.5 camber for back and 0 toe, she said car feels way firmer, I dont know, I dont feel anything) I cant wait to see her face after new parts arrive...
What is interesting, prior to last track day we set front toe to 0. Today the computer showed -0.2 left and +0.2 right. How??? LoL, I guess 305 semi slicks at front slightly altered the toe (high G's)? Anyways, will do the track day and will sort out the alignment with new proper parts next week.

Anyways, seems my initial plan to do modest changes and keep this car DD is slightly changing... YOLO, I have always loved racing. It has been in my blood since a small kid, lets go mad and turn this car into track beast.

[ZPD]

Originally Posted by priitserk

Like always, sometimes things go south :facepalm Went to the alignment and the dude said its impossible to get good alignment considering these arms have to be 5mm longer than OEM arms. So, I did unthinkable and just ordered from Suspension Secrets full blown suspension kit. Will change out everything and then we can also get proper alignment done.
Will still go to track this Saturday and will share how new traction arms even with crappy alignment feel. At least my wife who just came home with bimmer asked wtf have you done with the car, it feels different (we managed to dial out -1.5 camber for back and 0 toe, she said car feels way firmer, I dont know, I dont feel anything) I cant wait to see her face after new parts arrive...
What is interesting, prior to last track day we set front toe to 0. Today the computer showed -0.2 left and +0.2 right. How??? LoL, I guess 305 semi slicks at front slightly altered the toe (high G's)? Anyways, will do the track day and will sort out the alignment with new proper parts next week.

Anyways, seems my initial plan to do modest changes and keep this car DD is slightly changing... YOLO, I have always loved racing. It has been in my blood since a small kid, lets go mad and turn this car into track beast.

I went full SPL and I am assuming that it will be the same as Suspension Secrets. My $0.2: It was a very small improvement. Probably the lowest improvement per $ of any of the other mods that I have done. Don't get me wrong- it was still a good mod- it basically firms up the suspension and makes you more confident but only gave me a second or less reduction on my lap times. Do some research on the install- it is really intense.

[priitserk]

Originally Posted by ZPD

I went full SPL and I am assuming that it will be the same as Suspension Secrets. My $0.2: It was a very small improvement. Probably the lowest improvement per $ of any of the other mods that I have done. Don't get me wrong- it was still a good mod- it basically firms up the suspension and makes you more confident but only gave me a second or less reduction on my lap times. Do some research on the install- it is really intense.

if I can shave off one second with these mods I'm one second behing gt3's. I can assume adding coils and going to 18 inch wheels I can run in the same league with them. That's my end goal.

Installation wise yes, it took me a bit time to understand how to install rear traction arms (havent done that befor). Bolting them on is something I can do, adjustment, no. I'll find a professional for that.

[ZPD]

For the SPL links, you have to drop the rear subframe and remove a lot of stuff from the front to reach some of the bolts.

[priitserk]

Originally Posted by ZPD

For the SPL links, you have to drop the rear subframe and remove a lot of stuff from the front to reach some of the bolts.

yep. thats gonna be "fun" 😃😃

[priitserk]

To the battle. Track day.

[priitserk]

It was a tough day at track. I am getting faster but it feels that with every tenth gained car becomes much harder to drive. Nervousness on fast corners and brakings is becoming intolerable.

Made personal best, 1:23.2, Racechrono optimal lap based on my sections was 1:22.5, so almost second is still there (seat time). 1:22.5 is doable and that brings me to only one seconds from Porsche guys. I hope SS kinetic kit solves some of the cars softness and nervousness. And main thing: seat time, I need more of it.

fast corners, especially that include weight transfer, are horror. all wheel drifts are so easy to come, rear is crazy loose. I guess the stock suspension is not handling the speed anymore. Zero confidence... 4 wheel drifts at 170-180km/h are not something I want to deal with near concrete... What I learned is that I need to be a bit easier on brakes. Brake little earlier, reduce sudden and rapid weight transfers, then it was much better and also made my new personal best.

I stopped using sport plus engine mode. Sport is much better. Throttle sensitivit is much more tolerable and I could turn the TC from 6 to 3.

Random session video, but at least got my camera issues fixed.

[priitserk]

Made quick car inspection. All bolts are tight 😃🤘

Tire wear is excellent. AR1 is keeping up extremely well. Though I noticed -1.5 camber at back is not enough. There is a 1cm non weared section at inner rear tire.
Front has -2.5 camber and outer side has a bit more wear, I'll try to add a bit more camber there as well (but i need to start checking tire temps to properly manage the camber, need to purchase some temp. measurement device)

[adenjr]

watched the clip, you need to run the car in "track mode" to turn off the street driver aids.. i believe some of these aids cut power/ auto brake (e.g. when you were running close to the yellow porsche) which will slow you down/ is dangerous because the car acts erratically