[Westersund]

I have designed new ducts specially made for the Fall Line F8X/G8X M billet lower control arms for those of you that run a coilover instead of a divorced damper/spring setup like OEM. I've also made a bracket to mount the headlight level sensor to the control arm.

[Charles33982]

Still offering the rear kit for 2021 M2 Comp? Just to confirm my assumption of the location of the duct feeding into the backing plate, is it directing air mostly into the center hat of the rotor?

[Westersund]

Originally Posted by Charles33982

Still offering the rear kit for 2021 M2 Comp? Just to confirm my assumption of the location of the duct feeding into the backing plate, is it directing air mostly into the center hat of the rotor?

It's still available.

It doesn't direct the air directly into the hat because that wouldn't be ideal on a BMW with the parking brake designed the way it is. On the rear discs there's no slots, because of the friction ring for the parking brake shoes, in the hat that lets air escape from the center of the hat out into the vanes of the disc like it is on the front discs. So that's why I've designed the ducts so they direct air in the gap between the hat and the friction surface of the disc so the air goes directly, or at least as much as possible, into the vanes.

Here's a picture from FCP Euro that shows what I mean:

[Westersund]

A Fall Line special made for phantomse7en for his rear axle on his F87 M2 were he uses Fall Line lower control arms and toe arms. Customized ducts for the lower control arms and hose holders for the toe arms. Fall Line doesn't include a headlight level sensor bracket with their lower control arms so I designed one which will be included and fits bolt on without modification to the OE level sensor, you can even re-use the hardware. The bracket is printed in Adura X (Carbon re-inforced nylon) and it's super sturdy. Also fits the G87 M-series (Control arm ducting)!








Some more in-detail pictures of the bracket.

[phantomse7en]

Finally got around to installing my rear kit with the modifications Westersund made to accomodate the Fall Line Motorsports toe arms and LCAs. Everything fit up well. Psyched to give these a try!

[phantomse7en]

Originally Posted by Westersund

A Fall Line special made for phantomse7en for his rear axle on his F87 M2 were he uses Fall Line lower control arms and toe arms. Customized ducts for the lower control arms and hose holders for the toe arms. Fall Line doesn't include a headlight level sensor bracket with their lower control arms so I designed one which will be included and fits bolt on without modification to the OE level sensor, you can even re-use the hardware. The bracket is printed in Adura X (Carbon re-inforced nylon) and it's super sturdy. Also fits the G87 M-series (Control arm ducting)!








Some more in-detail pictures of the bracket.

Westersund made some adjustments to the original design for some better fitment. Just got it mounted up to test it out. If you're running the Fall Line Motorsports rear lower control arm, this is currently the only solution I know of. The fitment of all the hardware and bolts is perfect.

[Westersund]

Thanks for sharing the nice pictures phantomse7en

[n8dgr84]

You might consider some ducting to maximize the efficiency.

Do you have a product for the front factory rectangle brake cooling outlet in the fenderwell?

[phantomse7en]

Originally Posted by n8dgr84

You might consider some ducting to maximize the efficiency.

Do you have a product for the front factory rectangle brake cooling outlet in the fenderwell?

I think what you have linked is a good advice for radiator/heat exchanger cooling, but I'm not certain it's an optimal inlet design for brake cooling.

With a radiator it's less about the velocity of the air coming at it and more about the pressure differential of the air inlet and outlet (creating more static pressure on the inlet side and more dynamic pressure on the outlet side). Essentially you're trying to have your inlet sized to about 20-30% of the "finned" area of the face of the cooler and have it transition smoothly to the total finned area.

With brake cooling you're trying to inlet air at a higher velocity to duct it to the brakes typically in a very targeted and small area comparatively as you have the rotation of the disc exhausting hot air via convection. You don't need to have that smaller inlet to larger area transition as you would with a radiator that's in a fixed position.

I'm not saying there isn't potential for the design to be improved, but overall the current design is pretty well in line with what I've seen on race cars and honestly is even more well thought out and designed to some setups in my opinion.

Air ducting for heat exchangers:

Air ducting for brake cooling: https://www.essexparts.com/news-blog...n-my-track-car

[Westersund]

Originally Posted by n8dgr84

You might consider some ducting to maximize the efficiency.

Do you have a product for the front factory rectangle brake cooling outlet in the fenderwell?

I've considered utilizing the outlets in the fender liners but came to the conclusion that it won't be a better solution. First there's space constraints if you don't want to rub/wear out the ducting with your wide track tires continously and if the tires clear the ducting you'll have a serious restriction in the ducting at the outlet in the fender liner (a 90 degree shallow section to clear the tire). For those reasons it has been a no go for me on the F8X platform. On older BMWs however I prefer making ducts/inlets for the front bumper, but the older BMWs didn't have a radiator/heat exchanger for the oil cooler and an AUX radiator beside the regular package with condenser, radiator, servo cooler and DCT-cooler.

The best option in my opinion if you want to maximize the air going to the backing plate is installing M2 CS Racing ducts on the front bumper. You'll have quite a bit of work to get everything to fit and the downside is that you have to cut up your front bumper.

And I think phantomse7en summed it up good in regards of radiator ducting vs brake cooling ducting.

[n8dgr84]

Yes, after reading the article on Essex I realize it is a marginal solution as they address it directly.

Thanks for sharing your insights, gentlemen.

[phantomse7en]

Originally Posted by Westersund

I've considered utilizing the outlets in the fender liners but came to the conclusion that it won't be a better solution. First there's space constraints if you don't want to rub/wear out the ducting with your wide track tires continously and if the tires clear the ducting you'll have a serious restriction in the ducting at the outlet in the fender liner (a 90 degree shallow section to clear the tire). For those reasons it has been a no go for me on the F8X platform. On older BMWs however I prefer making ducts/inlets for the front bumper, but the older BMWs didn't have a radiator/heat exchanger for the oil cooler and an AUX radiator beside the regular package with condenser, radiator, servo cooler and DCT-cooler.

The best option in my opinion if you want to maximize the air going to the backing plate is installing M2 CS Racing ducts on the front bumper. You'll have quite a bit of work to get everything to fit and the downside is that you have to cut up your front bumper.

And I think phantomse7en summed it up good in regards of radiator ducting vs brake cooling ducting.

For sure. The Speed Engineering front ducts are using the fender vents as you described. Coincidentally my right front tire (18x10 wheel | 265/35r18 RE71RS) smacked the duct into the back of my CSF Oil Cooler at one point and dented fins.

The M2 CSR duct should fit an OG M2, but one thing I'd maybe mention is it may get quite tight if you're running a larger oil cooler / aux radiator. I'm going to do some more tinkering with it once I resolve my waterpump/thermostat issue.

Ultimately, the way you have the front ducts mounted to the control arms is probably the path of least resistance for most folks. And honestly, BMW runs one of the ducts there on some of their race cars, so we know its viable.

[Westersund]

Originally Posted by phantomse7en

For sure. The Speed Engineering front ducts are using the fender vents as you described. Coincidentally my right front tire (18x10 wheel | 265/35r18 RE71RS) smacked the duct into the back of my CSF Oil Cooler at one point and dented fins.

The M2 CSR duct should fit an OG M2, but one thing I'd maybe mention is it may get quite tight if you're running a larger oil cooler / aux radiator. I'm going to do some more tinkering with it once I resolve my waterpump/thermostat issue.

Ultimately, the way you have the front ducts mounted to the control arms is probably the path of least resistance for most folks. And honestly, BMW runs one of the ducts there on some of their race cars, so we know its viable.

Good points! Forgot to mention that it will be very tight with the M2 CS Racing ducts if you run a larger oil and aux cooler. You've told me and I've already forgotten.

And we've seen Porsche running their scoops on the control arms for years with good results, but on the other hand Porsche have always been good at sizing their brake discs accordingly as well.

[Westersund]

Track season is about to start!

[Alex77586]

Just sent you a PM about the front race kit! This is awesome

[Westersund]

Just got a fresh batch of backing plates!

I also got some real-life measurements from Clutchtime from one of his trackdays. He told me: "We measured the rotors at 393C and caliper at 183C after 5 hot laps, then did a quick a cool down lap and measured the rotor at 185C and caliper at 124C (coasting at around 100-120kph around a 5km circuit). What this did tell us that the brake cooling works!"

[Yossii]

Just PM about purchasing the kit .

[Westersund]

Originally Posted by Yossii

Just PM about purchasing the kit .

You’ve got a reply in your inbox!

[Westersund]

Perfect time to order your winter upgrades!

[AJZINO]

Hi there can you pm me i want to purchase the front and rear kit i got the 2nh callipers.
Thank you

[Westersund]

Originally Posted by AJZINO

Hi there can you pm me i want to purchase the front and rear kit i got the 2nh callipers.
Thank you

Sorry I've totally missed this as I haven't recieved a notification. I left you a visitor message how you can reach me. Can't PM you either.

[phantomse7en]

Just wanted to share the front kit does work with the AP9660 Essex Front kit. The caliper side vent doesn't mate up unfortunately due to the brake caliper adapter for these brakes. Westersund has a universal duct that may work for that, but I'm going to opt to run without and check back after seeing how performance is.

The rear kit works naturally as well--only thing worth mentioning is the stock dust shields do need to get cut back on the caliper side. I'm also going to drill some additional holes in for cooling.

Essex actually recommends not running brake cooling, but my suspicion is this is mostly due to other brake cooling designs not appropriately pointing air and using dust covers that aren't vented.