Absolutely, semi slick will always be THE option in dry condition, no matter the temp. You just need to find the right compound/tire model for the temperature you operate in.. Ideally, you would have 3 types of tires, UHP for the wet like ps4/4s cold/warm days, A soft semi like A052 for the colder days or damp surface and Direzza/CR-S for the hot summer days. That would be my personal 3 tire combo, if i was rich enough

So with AR1 being a softer compound, is really good in those temps. The CR-S fx, would take a lot of time to get heat into them.. Fx in Easter this year, i needed 2 full stints on Nürb GP to get the tires into a window where they started to be quite good.. Unfortunately, they lost pressure and temps, within 15minutes in the paddoc.. But the core still being warmish they just needed one lap to get into temperature and pressure again.. So for me, i have narrowed down, that the AR1 are mega in sub 15 degrees, above that, a different compound would be more optimal, if consistency is what you want.. Ar1, is really an easy tire to live with, if you arent driving longer stints at a time..

For sure.. drive drive drive and enjoy the capabillities of the car.. Just saw a fully stock one, with ps4s running sub 7.4x in sub optimal conditions.. So out of the box, the car is very capable..

Yeah, try tostep into a VW Golf Mk8, im sure you will get ticks from touching anything in there.. Its the worst new spec car, cabin quality wise i ever been in.. That goes for Audi B9 too.. Simply too much hard scratching plastic.. The days of high quality interiors seems to be gone in normal class cars.. The M cars, do retain some refinement.. But hard plastic is my enemy.. Id rather had hard metal.. It still feels quality, and doesnt squeek after some times.. Having it polstered with Alcantara, would be a good ide,especially if you dont plan to strip the weight out.. I mena, if want to strip in 3 years time then 3 years with alcantara makes sense.. Even if it cost a few thousand of euros.. Alcantara will emmidiately make it look like a highspec car, which it already is.

That interior.. Thats nice!

Looking forward to that.. I always like to see crazy builds, its like seeing a progress but without spending money myself I also think the forum needs more of the big builds shown, a lot can be learned from one build to another..

@m2arcel Are you gonna show some pics of the mega project you went through?

That is interesting.. 8ah battery lol :P Can you share a pic of how it fits in the space? Definately an interesting option, especially with the low weight..

This morning the work van battery was dead. The BMW and the T5 share exactly the same battery.. So naturally im going to replace VW T5 battery with the one from the BMW, and now wants to install a Lithium one in the BMW. A few questions to that, How low on Ah can i go with the new lithium battery? In a normal BMW m135i they use 80ah AGM battery . As most of you already know, i dont have aircondition, heated seats, Idrive + soundsystem, heater matrix or anything niceness in the car. What i do have is Electric windows, 4 amp blower fan for interior cooling, 3 amp raspberry pi.. The BMW also have IBS (intelligent Battery Sensor). As I understand, its not possible to remove this system so i would have to replace with a lithium battery that is made for IBS?

Interesting! I will try to see if i can find out if there are any way to see/calculate how much Amp/Watts starter motor + what diverse electronic modules consumes when you go into the car and wants to start it. I can probably not find anything, but running a 20ah battery is possible would probably be more than i really need.

I also have done this, when registered the battery i mounted 1 year ago though not changing the size, since it was the same. AGM even at 20amps are just too heavy to make sense for a weight upgrade. Im at the point, where the car could be very close to a sub 1300kg half tank. (1365kg) with just a bit more than half a tank. So the more waight saving the better. Lithiumnext RACE40 weighs 2.6kgs.. But is not IBS optimized. Their Track60 are IBS compatible and weighs 4kg dead. So that is a 18kg weight saving. Allthough in the wrong end of the car, but then i must just remove more in the front

Powder coating the cage to what ever color you desire, shouldnt be too expensive.. But if you want it pretty invincible black would be fine.. I have one in black, but on my car, im going with black and white details for the yas marina blue color.. So my advice for you would be, find the color scheme you want to use on your black car, then make it throughout the whole build.. In my opinion, that is the most desireble thing to do.. Or just make it batman, black on black..

-3.7 degree camber front -2.5 degree camper rear 1mm toe OUT front each corner. 1.5mm toe in rear each corner works really really well on my car. I don't find it too hard on the inside shoulders of the fronts.. Braking performance is really good too.. I personally like the fast turn in behavior, and then midcorner, less agressive steering dure to less angle on the outside side.. For trail braking this works really good and you can rotate the car nicely i slow corners, without snapping the rear.. At least, that how i like the setup. With 1.5mm toe in on the rear, i dont find the rear too lazy as it is with 2mm..

Cristian Vidal did 6.55 in a full interior F80 600ps but with Hoosier Dot E slicks on 18".. Both the CupR and the Hoosier are real cheater tires So you are completely right, the tires do the biggest difference on an already capable car!

Nice, good to see that Carsten! Mega color for the M2! Big congratulations on the purchase!

Super cool project! Can't wait to see the result! How far do you plan to go with the project? Would love to see a very weight optimized G87.. I myself have removed nearly 200kgs from my 1series. Curb weight with half a tank is now around 1365kgs.. Would it be possible to remove 250kgs on the g87? Maybe even 300 kg if you have very deep pockets and desire to do so? Would be very cool to see a G87 sub 1500kg with half a tank. I think it would be able for a sub 6.53 lap on the ring with a little more power than stock.

I'm wondering what would bethe best option cooling wise? Option 1 : Run G11 coolant mixed 50/50 with water. Option 2: Run Motul Mocool mixed only with water 5% Mocool with 95% water. Option 3: Run G11 Coolant mixed 50/50 with water, but with suitable 5% Mocool too? Could the Mocool works as a stand alone, without G11 coolant? Car will never be driven in below freezing temps anyway.. But would maybe be started up, in the mornings when you have maybe +5 degrees... Or had overnight temps just around 0degrees.. Water doesnt really freeze in 0 degrees in pressurized system if i remember correct.

I will just use the 50/50 mixture.. I dont really have issues with temperatures.. But Just wanted to know if the Motul was more than just a placebo or could be used standalone. But after Phil's experiences, i'm just gonna pour in the normal coolant mixture as ive always used

Its crazy how fast things can go wrong. The waterpump was changed though, in the winter for the 2023 season. So everything there is all "new".. But having the cooling system to fail seems to be very common on the BMW's.. especially the ones with eletric driven coolant pump.. Yes, i'm fully with you in that regard.. We can't ensure 100% that things won't have a bad outcome for others if shit happens on our own cars, but atleast we can try to make our cars + components as reliable and safe as possible. Which has been my mantra for the whole car throughout the years.. But some things you just can't be ready for.. Fx a broken coolant pump, oilsump being punched a hole into or what elsen in that regard.. Broken engine etc.. I think most of us regular track day folks, have this mindset..

Just realised the G11 im speaking about is indeed G48.. The G11 spec is VAG spec, but its is something that my local BMW dealer also call their OEM coolant.. So sorry for the confusion, it is indeed G48 i must search and buy for my car.

So what is the main difference between G48 and G11? Is G11 just a new spec of coolant for BMW? I tried googling this, but have not been lucky to scource the right information between them..

Makes fully sense! And i'm going to use demineralised water anyway, so corrosion wont be an issue either. The only thing that worries me a bit, if i should have another leak of coolant.. Would love to have some that wasnt as slippery/oily... But i guess, its a game between safety for other cars and safety for the components on our cars. Normally im on the top of my game looking my car through before every trackday.. But shit can happen, and it did last time I was around the track, luckily it was so minor, that the coolant was drying up in the engine bay before it could come out.. Had to top up around 2 litres for 800kms trackdriving and around 200km road driving, so the useage was very minor.

That's what i was a bit worried about too with 5% dilution in 95% water.. Ive always driven with 50/50 mix of coolant and coolant temps are not really an issue. But as I just saw that there was some additive that might would be better for lubrication and overall performance of the cooling system i was starting to think about using it.. But looking through Motuls Technical datasheet, doesnt really tell if its just a "placebo" product.. I will continue using the G11 coolant in the 50/50 mix.. Thanks for sharing your experience with it.

Yes, i had no issues with them other than this time around.. But they said it at happened a few times, and they wanted to bring mea product worth their name.. So i can't fault them.. I was considering going back to OEM.. But reached out,and asked if they had issues before and then they immediately met me in eye sight, prompted me a generous discount and shipped the cooler the same day! So service and products is really nothing that can be said anything bad about..

Hi guys! Sorry no German: Feel free to use Google translate, i use the same when reading all your messages, and it works ok for me, i am sorry i cant write or speak in German. First a "small" introduction about who I am, before going into the more important topic, the M135i Clubsport. Firstly, go brew a big mug of coffee, and find your favorite chair....... So lets start with a little story about me and my journey with the ownership of - my name is Lars, im 31 years, a Danish man, and i am an addict, Hi to you all. Back in September 2019 i Bought my first BMW, a 1 series "M", coming from a long time ownership of different VAG's, i didn't know what journey i would be about to be going into. After a few months of ownership of the M135i which at the time of pickup came with a remap and no catless downpipe which gave the power of 370ps and H&R springs on EDC dampers. I felt I had too much trouble to put the power down on the road, especially when the summertime went to fall came, so I decided to buy a Quaife Diff, to get more traction and a more predictable rear end. And what a difference that did Black Friday 2019 came around and I was hungry for more power. So what does a hungry man do? Purchased the MHD tuning platform, and went straight to stage2+ map, I also bought a Burger motorsports intake, since I wanted to have all the cool turbo noises, yes I know I'm a silly child. Car drove fantastic, it had so much more torque than I was used to, car got dynoed, January 31 2020, to 390ps and 598nm. For nearly 4 months car drove with that setup, until I decided to mount a CSF intercooler, because of IAT went sky high on longer pulls. The summer 2020 came around and I was thinking about doing a methanol injection system from AEM, firstly to maximize consistency of power and to run even cooler IAT, and to keep the engine internals an intake valves clean. That kit went in along with a GFB DV+ diverter valve, which was a nice small upgrade that gave more tjutju sounds from the turbo. In late July/early August 2020, I asked my better half if she wanted to go on a trip with me to Adenau and Nordschleife, which since my early 20's have had been a long dream for me to drive and experience that. I have NEVER been on a racetrack, by this point, but I have done a lot of back road trashing, which we all know isn't ideal. She said yes, and I then started to look at my car and thought to myself, what kind of upgrades would be ideal, that I could afford to do before the trip. A lot of thinking was being done, but when the car was at the TUV inspection, the guy told me my brakes were almost worn out, so that meant I would need 4 new discs and brakepads.. I have already looked at the Mperformance 370 /345 mm brakes and dreamed about that, because I always felt that the brakes are very week on the M135i especially compared to VAG's, but luckily I found 2 front calipers from a Danish scrap dealer who had them from an mperformance F30 model, I got them at a killer price, lets just say, I sold my oem Blue calipers for the same amount of the Mperformance calipers. I ordered complete EBC brake discs, braided lines and EBC Redstuff pads from UK. All in, my brakes did cost me almost half as if I was going to just buy the Mperformance kit, and I could keep the original blue color, which was a win win in my opinion. We came to Adenau late August, spent 4 nights there, and I got around to drive 2 round on Nordschleife and 1 stint on the GP track. Yes that was all I did, and yet I managed to spin out on the last round on the GP track, nothing happened to the car, us or anyone else, it was not really that dramatic, but I found my limit and the cars limit . Holy moly, I was so speechless about the atmosphere around the Nürburgring, it felt mostly like I was high all the time, I giggled so much, came once or twies in my pants, from all the cool cars being around there. You don't see Porsches and BMW M cars in Denmark that often, actually I have never seen a GT3RS or M2's before when I went to the Ring. So please, understand I was like a child in a candy shop, my girlfriend has never seen me be like that before. I think she hated me a little, because all I could talk about was all the amazing cars that was more racecars than actually roadcars, and how much it affected me. Hands down, I am truly being caught by the ring fever Home from the small vacation in Adenau early September 2020, and my head was high as fuck from all the endorphins running through my body. Over a month I just couldn't stop talking to friends and families about what a wonderfull trip it was and what an impact it had on my life. So I sat down at home and made up a plan that it was now the time for me, to jump out of my closet and chase my dream further to join the Nürburgring at least ones a year. I looked at what things I would do to my car, but we all know that you have a plan A because costs and other stuff in life also need to happen, but I kept aiming higher and higher, I wanted the perfect road legal track day car. I gave my self 3 years to build it, but lets face it, I managed to find money I didn't know existed and here 8 months later, I happened to join this Forum interact and to hopefully meet some of you guys and have some chit chats along the way or maybe drink a beer, barbeque and so on, in the evenings, it would be nice to have some like minded friendships around the ring. To make the list small, I'll just recap it here: car got over the winter this day, in this order - TTE550 Turbo upgrade, Protrack One 8x18 and 9x18 with Nankang NS2R tires 235/255, Millway camber plates for stock suspension (are now for sale, been on the car for one month), Millway rear subframe aluminum bushings, KW clubsport 2way suspension, KW bmw M4 topmounts, to retrofit the f8x aluminum strutbrace, yes this fit the F2x chassis, max 2.5 degrees negative camber though, but with superpro or powerflex bushes you can get up to negative 3 degrees camber. Plans for May Month, are to mount the MMR sump baffle in the oil sump, to prevent oil starvation of the engine. Later in the winter, I will maybe mount an Accusump if is can see in the logs it will be necessary. Thank you for reading this far, hopefully you've enjoyed it.