BMW 1M Track car (start)

[arch2r84]

After slowly getting work done and just doing repairs on my 2011 BMW 1M I finally got some more room to get some upgrades!

KW clubsports v2
BBS RIA 10.5 et22 squared from (@slicer_m) on Instagram
265 Squared at the moment will go up to 275 or 285 squared when the tire is available.
Nankang AR-1
Racetech 4009 seat
CAE shifter
PFC 08 pads
active autowerke intercooler
VRSF downpipes
Active autowerke Catback exhaust
Dinan stage 2 tune



Went to WSIR for my second time and ran a 1:33
Also went to streets of willow for the second time and ran a 1:27
still learning the line on both tracks.
it was about 90 degrees on both days, had a little overheating issues after about 8-10 laps but one cool-down lap made it all go away.
besides of course going to the track more for seat time new mods to the 1M soon.
Looking to get

-Dinan oil coolers
-CSF radiator
-KMP Steering wheel
-Stoptech trophy 6 piston kit
-Motorsport24 Carbon door cards
-Custom roll cage
-New bucket seats (still undecided)
- and new bushing all around the car

If anyone has any recommendations for parts to throw on the 1M that will help let me now.
IF anyone is in SO-CAl
contact slicer for wheels
and JMP Autoworks for any work on their cars.
both are amazing to work with.

https://flic.kr/p/2g8VMvq
https://flic.kr/p/2g8Waib
https://flic.kr/p/2g8VMiS
https://flic.kr/p/2g8W9VN
https://flic.kr/p/2g8WakA

Some new mods and tracks I have gone to.

Custom Rear Bolt in cage by:: Michael cox AKA Michael cox racing on Instagram
Stoptech st40 355bbk
Recaro SPG XL x2
Schroth 6 point Harnesses
Rear trunt till Front seats Gutted

Laguna Seca First time with MDM on 1:44.01

New mods to come
APR chassis mount splitter
M235ir Wing chassis mounted
295 Squared Nankang AR-1

[CarJunkie]

Beautiful wheels!

I haven't yet found a need to upgrade the brakes beyond pads (also PFC-08) and stainless lines, even when running a stage 2+ tune. That may change when I go to R-comp tires, probably next year.

I am getting ready to upgrade the radiator, which should prevent any need for more oil cooling. If you are running stock power, I am surprised you are overheating. I never had an issue until I tuned. MHD will allow a lower cooling target which will really put that CSF radiator to work for me and keep everything chill.

I want to get a better seat and harness, but I still plan to drive the car on the street occasionally, so I am not pulling that trigger yet.

[ts0ulc]

Nice white 1! Where are you located in SoCal? I’ve only seen a handful here.

[arch2r84]

I am located near Agoura Hill. @ts0ulc

[Tinsta]

Excellent, looks great, but don't the front wheels catch the arch liners? 10.5J et 22 is very aggressive and a 265 on 10.5 is very stretched no?

[gmx]

Originally Posted by CarJunkie

Beautiful wheels!

I haven't yet found a need to upgrade the brakes beyond pads (also PFC-08) and stainless lines, even when running a stage 2+ tune. That may change when I go to R-comp tires, probably next year.

I am getting ready to upgrade the radiator, which should prevent any need for more oil cooling. If you are running stock power, I am surprised you are overheating. I never had an issue until I tuned. MHD will allow a lower cooling target which will really put that CSF radiator to work for me and keep everything chill.

I want to get a better seat and harness, but I still plan to drive the car on the street occasionally, so I am not pulling that trigger yet.

I struggle with "Stage1" power and overheating specifically hitting 512 Torque limit which is component protection due to overheating. This coincides with 117C degree coolant temps (and oil around 130C)

One thing to mention, a lot of people compare and gauge the performance of the CSF radiator along with a fresh flush of coolant (duh!). Imo, this skews the comparison. If you've ever seen a modern OEM BMW radiator split, they have a unique design almost like intercoolers with "turbulators/finpacks"., Something I doubt CSF has?

Anyway, gist of it is. A fair comparison of radiator performance would be on fresh coolant or 100% water+corrosion inhibitor if climate allows.

[arch2r84]

Originally Posted by Tinsta

Excellent, looks great, but don't the front wheels catch the arch liners? 10.5J et 22 is very aggressive and a 265 on 10.5 is very stretched no?

My shop had cut the liners a little, and put mesh around the oil cooler so rocks wouldn’t damage it, but you are able to run them without issues, 265 is not stretched badly for track use with low tire pressure it works great waiting for the tire to come to the U.S as a 275 should come this month.

[CarJunkie]

Originally Posted by gmx

I struggle with "Stage1" power and overheating specifically hitting 512 Torque limit which is component protection due to overheating. This coincides with 117C degree coolant temps (and oil around 130C)

One thing to mention, a lot of people compare and gauge the performance of the CSF radiator along with a fresh flush of coolant (duh!). Imo, this skews the comparison. If you've ever seen a modern OEM BMW radiator split, they have a unique design almost like intercoolers with "turbulators/finpacks"., Something I doubt CSF has?

Anyway, gist of it is. A fair comparison of radiator performance would be on fresh coolant or 100% water+corrosion inhibitor if climate allows.

That's a very good point. It would be interesting to see what temperature could be maintained just by changing out the fluid. I may do just that and see what happens. I never drive the car in the winter, and my garage never falls below about 40°. I've been planning to put in 25% antifreeze 75% water mix with redline water wetter. That will protect down to 10°F, which should still be plenty of protection for my usage and storage situation.

[frenzy757]

Hows the car put the power down with those mods?

[dimeo187]

Looks like we have similar taste. I have a bit more done with suspension...Eibach front sway bar, rear camber/toe/trailing arms, all aluminum bushings including diff (built by diffsonline). I also have full Akra exhaust with a custom tune and precision raceworks coil packs. AD intercooler. Most everything else is the same just different manufacturers!

I'm running 275/35 nt01 square at the moment but once they're shot ill be moving to a 285/30 square

I am very curious about your carbon door cards and kmp steering wheel, if you can get me some details that would be appreciated!

[frenzy757]

@dimeo187 same question to you. Hows the rear end stability with your setup (especially since you are square).

[dimeo187]

Originally Posted by frenzy757

@dimeo187 same question to you. Hows the rear end stability with your setup (especially since you are square).

It's very stable and predictable. Though, it does depend on your suspension/alignment/tire setup quite a bit and I've also upgraded my diff to a three clutch 35/60 ramps built by diffsonline.

[slicer]

Looks Awesome!!! Thanks for the plug on the RIA wheels.

[arch2r84]

Originally Posted by frenzy757

Hows the car put the power down with those mods?

the car puts the power down perfectly no issues at all.

[arch2r84]

Originally Posted by Tinsta

Excellent, looks great, but don't the front wheels catch the arch liners? 10.5J et 22 is very aggressive and a 265 on 10.5 is very stretched no?

it's not that bad of a stretch for running the wheels with 3.2 degrees of camber in the front on track it's amazing.

[slicer]

Originally Posted by Tinsta

Excellent, looks great, but don't the front wheels catch the arch liners? 10.5J et 22 is very aggressive and a 265 on 10.5 is very stretched no?

The manufacturer's recommended rim width range for a 265/35/18 tire is 9" to 10.5". When installing the tire on the widest possible wheel you gain tread width, sidewall support and ultimately squeeze more performance out of the tire. I generally avoid exceeding the manufacturer's recommended rim width as too much of a stretch will detract from performance. In this instance he is getting everything he can out of the 265 by installing them on a 10.5" wheel.

It's hard to capture in pictures but the photo below is the OP's car (I installed his KMP steering wheel over the weekend). In person I thought the 265's looked fantastic on a 10.5" wheel. I was honestly surprised at the results. I'm a huge fan of the 1M with this wheel/tire setup.

RIA on 1M by slicerM, on Flickr

[abb6027]

Yes I run the same wheel/Tyre sizes and it works very well on track.

[gmx]

http://nankangtyres.com.au/tyre/ar-1/

Nankang recommended rim width for their tyres. They don't make a 275 18"

Hankook Z221/Z214 optimum is generally high for a given size.

[slicer]

Originally Posted by gmx

http://nankangtyres.com.au/tyre/ar-1/

Nankang recommended rim width for their tyres. They don't make a 275 18"

Hankook Z221/Z214 optimum is generally high for a given size.

That's not the recommended rim width. That's the measured rim width. Tires in each given size have a predetermined wheel width used for measurement. This is designed to allow for consumers to compare tire measurements across brands (different wheel widths will yeild different tread width and section width). Tire rack is a good resource. You will find that all tires in 265/35/18 are measured on a 9.5" wheel. However manufacturer's typically have a recommended rim width range. Every spec I have pulled for a 265/35/18 tire has a recommended range of 9" to 10.5". Nankang is not listing a recommended range at the link above but I think it's a reasonable assumption to say that their recommended range would be consistent with every other manufacturer's

[gmx]

Originally Posted by slicer

That's not the recommended rim width. That's the measured rim width. Tires in each given size have a predetermined wheel width used for measurement. This is designed to allow for consumers to compare tire measurements across brands (different wheel widths will yeild different tread width and section width). Tire rack is a good resource. You will find that all tires in 265/35/18 are measured on a 9.5" wheel. However manufacturer's typically have a recommended rim width range. Every spec I have pulled for a 265/35/18 tire has a recommended range of 9" to 10.5". Nankang is not listing a recommended range at the link above but I think it's a reasonable assumption to say that their recommended range would be consistent with every other manufacturer's

Ask the rep for that info. Better than assuming. The top semi/full slick manufacturers will happily tell you. For example, Hankook optimum is a 10" for their 265/35/18 regardless of compound.

[slicer]

Originally Posted by gmx

Ask the rep for that info. Better than assuming. The top semi/full slick manufacturers will happily tell you. For example, Hankook optimum is a 10" for their 265/35/18 regardless of compound.

So even your research has shown that a 9.5" isn't a typical recommendation?

I have spoken with tire engineers at length about this topic. I didn't consult with Nankang in this instance because I did not spec the tires for the OP, nor did I install them. That being said, every single tire manufacturer lists the rim width range up to 10.5" for 265/35/18. Also, there isn't really a single true optimum for every tire size. There are other factors. For example, you need to consider fitment onto the car, wheel / tire sizes available, and desired feel (a driver may want a more responsive steering feel - therefore a wider wheel with the same tire size will provide that). Imagine the feel of a 265 on a 9" wheel versus a 10.5". The tire will 'roll over' more easily under lateral load on the narrower wheel. Conversely it will have more sidewall support on the wider wheel. Porsche even exceeds the rim width recommendations on some of their cars (997 GT3 is one example). Another example is Schirmer Race Engineering in Germany is specifying 10.5" with 265/35/18 front tires on their builds.

Not trying to argue here. Just trying to share the info that I have compiled over years of working in this arena.