Front Uprights update

amg6975 wrote

Direct bolt on but the E92 M brakes won't work. You need F3x/F8x or non-M E9x brakes, yeah?

Any info on geometry changes and part numbers?

Track/S wrote

Right, but i don't think anyone who wants to use GTS knuckles is going to want to use OEM brakes.

amg6975 wrote

Yes probably but then anyone with a BBK already on their car will need a new adapter at the least.

911r wrote

M4 GTS knuckles are a direct bolt on? M4 GTS arms necessary? Have you measured the change in geometry?

tsk94 wrote

When people do the F8X upright swap, are they still using E92 control arms? Can you use the F8X front tension arm if you do the upright as well? Or would you still need to use an E92 specific arm? tdott Would you happen to know?

tsk94 wrote

So I ended up getting the Strom uprights for the new E92 I'm building.
Now that these have been out for a while and a few people here are running them, I'm wondering what the general consensus is for how much less static camber you should run with these?

I know the uprights themselves reduce negative camber when you do a straight swap between the factory uprights. I would typically run around -3.5* to -3.8* up front on my old car, depending on track, tires, etc. About how much less should I expect to want to run with these?

Appreciate any insight



I’m running 3.6-3.8, but my spring rate is a bit lower than most. But these make it safer to run -4+ degree. Without it you can hyper extend the lower control arms as these fix the roll center, the control arms are at a much better neutral position intended by bmw. Also there is a limition on the strut tower. Most camber plates allow the shock shaft to hit or bind with the tower. I developed a enlarged strut tower and reinforcement plate.

Working well.

tlrid3r wrote

tsk94 wrote

So I ended up getting the Strom uprights for the new E92 I'm building.
Now that these have been out for a while and a few people here are running them, I'm wondering what the general consensus is for how much less static camber you should run with these?

I know the uprights themselves reduce negative camber when you do a straight swap between the factory uprights. I would typically run around -3.5* to -3.8* up front on my old car, depending on track, tires, etc. About how much less should I expect to want to run with these?

Appreciate any insight



I’m running 3.6-3.8, but my spring rate is a bit lower than most. But these make it safer to run -4+ degree. Without it you can hyper extend the lower control arms as these fix the roll center, the control arms are at a much better neutral position intended by bmw. Also there is a limition on the strut tower. Most camber plates allow the shock shaft to hit or bind with the tower. I developed a enlarged strut tower and reinforcement plate.

Working well.

Thanks for the info. What spring rate are you running? I'll need to double check mine, it's either 800 or 740, I think 800 though.

Is that a custom reinforcement plate you had added on, and slotted the holes? I normally slot the strut tower holes, which I'll need to do on mine still.

DRLane wrote

tlrid3r

Appears you have the camber plates installed “sideways”. Caster adjustment being used for camber?

Nice job on the cutout. Probably worth reinforcing, no?

DRLane wrote

tlrid3r

Appears you have the camber plates installed “sideways”. Caster adjustment being used for camber?

Nice job on the cutout. Probably worth reinforcing, no?

rTrackM3 wrote

Hi everyone, I decided to go with the Strom uprights with oem arm. I’m struggling getting more than -3.2 front camber. I also have adjustable rear arms. So I think this is constricting my ability to setup the car for a track dot tire or slick. It seems people are able to achieve a lot more with similar setups. Any thoughts or ideas to get me -4.0 degrees in front? The car has MCS coilover and vorshalg camber plates. I’ve also attempted to trim the strut tower lip for the nut clearance…

Thanks everyone
Ryan

Track/S wrote

Yes, direct bolt on, don't need gts arms.

For more than -3° of camber need some work on camber plates and adjustable arms.
I did not measure the geometry changes.

sammyF82GT4 wrote

Hi, Does anyone have a part number or link to the upgraded F82 GTS knuckles? Doing the rear Flange Hub Upgrade GT4 kit. Replacing new wheel bearings all around as well. Would like to look into this too soon.

tsk94 wrote

Similar experience on my car - Strom uprights with stock arms got me around -3.2* max. I ended up slotting my shock tower holes to allow more adjustment.

That said, after doing some tire temps this past weekend, I'm going to dial some camber out and end up running around -3.25~ again, compared to the -3.5 I am currently.

rTrackM3 wrote

There is a new part coming down the pipeline for the MCS dampers. I got ahold of them and installed. If I want I can now get -4.1-4.4 with the Strom knuckles. I’ve tested them on track with more camber and there is a significant improvement with the car / lap times. Here is how much I had to cut the shock tower. Nothing out of the ordinary.

BigTee wrote

Can you hare what this new MCS part is? I'd love me some -4 degrees camber.