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      03-26-2020, 08:27 AM   #67
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Quote:
Originally Posted by CanAutM3 View Post
Not quite. To make it simple, side-to-side movement of the top bearing changes camber, front-aft movement of the top bearing alter caster. If you plates only have a linear adjustability, it depends how that line is lined up. The GC camber plates have dual adjustability.
I know what the movements are..I just didnt know GC had both.
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      03-26-2020, 08:31 AM   #68
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Quote:
Originally Posted by N3_Gabe View Post
Coming from an E36, -2.3 to -3.0 sounds extremely low. I'm guessing due to weight, the camber is a lot less or is this because the lack of adjustability that Bmw offers with OEM control arms? Anyone know the camber numbers on the GT4 cars?
Some cars need a fair bit of camber to compensate for chassis and suspension flex. The M3(4) chassis and suspension keep improving with subsequent generations. Going from my E46 to my E92 to my F82 and now F82cs, I kept needing less and less camber for optimal tread temperature distribution.
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      03-26-2020, 10:09 AM   #69
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Quote:
Originally Posted by OhioRiderAaron View Post
I know what the movements are..I just didnt know GC had both.


Did you get the caster increase from the simple installation of the TCK plates, or does the caster angle change with camber adjustment, or both?

Can you share your current caster angle at your current alignment setting?
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      03-26-2020, 11:19 AM   #70
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Quote:
Originally Posted by N3_Gabe View Post
To be honest, I'm not an alignment guru and I'm also barely beginning to gain the knowledge myself so I am not sure. I just know what I've said is the basic idea behind wanting to adjust your caster angle.
What I am trying to wrap my head around is how much camber increase results from the caster with different steering angles. And then how much that increases with increased caster.

From what I gather, the benefits are not significant on higher speed corners (lower steering angles) but more so on low speed corners (higher steering angles).

The caster adjustment slots on my GC plates is not huge. The small increment they allow on caster angle likely have minimal impact on camber. IMO the adjustment is mostly there to allow equal left and right caster settings.
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      03-26-2020, 11:23 AM   #71
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Quote:
Originally Posted by CanAutM3 View Post
Quote:
Originally Posted by N3_Gabe View Post
To be honest, I'm not an alignment guru and I'm also barely beginning to gain the knowledge myself so I am not sure. I just know what I've said is the basic idea behind wanting to adjust your caster angle.
What I am trying to wrap my head around is how much camber increase results from the caster with different steering angles. And then how much that increases with increased caster.

From what I gather, the benefits are not significant on higher speed corners (lower steering angles) but more so on low speed corners (higher steering angles).

The caster adjustment slots on my GC plates is huge, so IMO they are mostly there to allow equal left and right caster settings rather than making large caster adjustments.
You're not going to get the best caster angle adjustments with camber plates. That's not their purpose. You need tension arms and/or bump steer kit.
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      03-27-2020, 08:49 AM   #72
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Quote:
Originally Posted by CanAutM3 View Post


Did you get the caster increase from the simple installation of the TCK plates, or does the caster angle change with camber adjustment, or both?

Can you share your current caster angle at your current alignment setting?
I would have to root around my paperwork to find the original caster but I believe it was around 6.9. After installing the TCKline plates it jumped up to 8.8. It was pretty easy to see how much caster was going to be gained just by looking at the bearing to plate location. Again, I would have to look back at the pictures of the plates themselves, but I *think* the caster change was built into the design, rather than adjusting with the camber.
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Last edited by OhioRiderAaron; 03-29-2020 at 11:44 AM..
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      03-28-2020, 06:27 AM   #73
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Quote:
Originally Posted by OhioRiderAaron View Post
I would have to root around my paperwork to find the original caster but I believe it was around 6.9. After installing the TCKline plates it jumped up to 8.8. It was pretty easy to use how much caster was going to be gained just by looking at the bearing to plate location. Again, I would have to look back at the pictures of the plates themselves, but I *think* the caster change was built into the design, rather than adjusting with the camber.
Wow, ~1.8deg is a nice boost in caster. I'm at the stock 7deg with my GC plates. Did you notice any improvements in steering feedback?
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      03-30-2020, 09:00 AM   #74
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Quote:
Originally Posted by CanAutM3 View Post
Wow, ~1.8deg is a nice boost in caster. I'm at the stock 7deg with my GC plates. Did you notice any improvements in steering feedback?
Steering felt much better after adding camber plates, but I can't for certain say that was due to the increase in caster angle (not experienced enough to realize difference).
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      04-07-2020, 02:10 AM   #75
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CS factory camber specs

Can anyone confirm if the factory front end camber on a CS is the same as a normal F/80. Seems if BMW has optimized this model for track use they would add a bit of camber in there for us. Thanks.
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      04-07-2020, 08:27 AM   #76
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Originally Posted by dezzracer View Post
Can anyone confirm if the factory front end camber on a CS is the same as a normal F/80. Seems if BMW has optimized this model for track use they would add a bit of camber in there for us. Thanks.
Exact same as all other M3/4 variants (except for the GTS).
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      05-18-2020, 11:39 AM   #77
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Reading thru this thread it's obvious that most of you have a good handle on how suspensions work and what adjustments to make. For people that are a little confused, this recent video by FCPeuro does a really good job at explaining what each setting does and why.

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      05-19-2020, 01:16 PM   #78
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I heard a rumor that the GT4 M4's are running upwards of -5.0deg of camber on the front. I currently have my GC plates set to around ~-4.0 and zero toe. Has anyone played around with higher levels of camber?
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      05-19-2020, 04:59 PM   #79
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Quote:
Originally Posted by F80Speed77 View Post
I heard a rumor that the GT4 M4's are running upwards of -5.0deg of camber on the front. I currently have my GC plates set to around ~-4.0 and zero toe. Has anyone played around with higher levels of camber?
I depends what type of tires you are running. Super sticky race slicks tend to like more camber.
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      05-19-2020, 05:13 PM   #80
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Quote:
Originally Posted by F80Speed77 View Post
I heard a rumor that the GT4 M4's are running upwards of -5.0deg of camber on the front. I currently have my GC plates set to around ~-4.0 and zero toe. Has anyone played around with higher levels of camber?
Think my GC plates are about maxed at -4.0 and planning on trying that with used DH
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      05-19-2020, 11:50 PM   #81
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That's right about where I get to before the camber slide lock bolts hit the aluminum brace. My shop actually had me at -4.2 but I dialed it back some, looks like I could clearance the aluminum brace some and get more if I wanted to get crazy haha. We'll have a pyrometer with us at Gingerman in June to hopefully get some solid data and I'll def report back toe will be kept at 0.
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      05-21-2020, 09:44 AM   #82
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What do you guys think about these alignment specs for mostly street with 2 hpdes a year?

-2.4 degrees front camber
.06 degrees total toe in(very very slight toe in)

-1.7 degrees rear camber
.26 degrees total toe in

Should i reduce rear toe in? Maybe .20 or .16 toe in?
Should i reduce front and rear camber a little?

Thanks.
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      05-22-2020, 09:55 AM   #83
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Quote:
Originally Posted by hC1001 View Post
What do you guys think about these alignment specs for mostly street with 2 hpdes a year?

-2.4 degrees front camber
.06 degrees total toe in(very very slight toe in)

-1.7 degrees rear camber
.26 degrees total toe in

Should i reduce rear toe in? Maybe .20 or .16 toe in?
Should i reduce front and rear camber a little?

Thanks.
I think that's a pretty solid setup for a few track events and mainly street driving inbetween. Sure if possible go ahead and reduce the rear toe, but it's not that far off as is.
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      08-11-2020, 08:16 AM   #84
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i'm running -2.6 camber at the front but the outer shoulders of my front Cup 2 are gone now (front tire pressure was 32 psi hot at track). i'm considering to increase the camber to -2.9 for the next track day with new front Cup 2.
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      08-11-2020, 08:42 AM   #85
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I'm still seeing more outside shoulder wear than inside wear with -4.0deg.
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      08-11-2020, 09:41 AM   #86
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Quote:
Originally Posted by Pong View Post
i'm running -2.6 camber at the front but the outer shoulders of my front Cup 2 are gone now (front tire pressure was 32 psi hot at track). i'm considering to increase the camber to -2.9 for the next track day with new front Cup 2.
Might have more even wear at slightly higher pressures (mid-30's), but should really consider bouncing from Cup 2. This spec is just not durable enough for hard running session after session fitted to M3/M4. Fighting a losing battle, imo
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      08-11-2020, 10:03 AM   #87
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Quote:
Originally Posted by F80Speed77 View Post
I heard a rumor that the GT4 M4's are running upwards of -5.0deg of camber on the front. I currently have my GC plates set to around ~-4.0 and zero toe. Has anyone played around with higher levels of camber?
The GT4 are also running race slicks...
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      08-11-2020, 10:43 AM   #88
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Had an alignment done today following recent Bilstein B16 Damptronic / Millway camber plates install.

I drive 50/50 road/track so looking for a sensible compromise and really just to get the car a bit sharper, neutral and confidence inspiring on circuit.

I'm running Pirelli Trofeo R's, F265/35/19 and R295/30/20.

Next track outing in a couple of weeks. Will try increasing the front camber and find the sweet spot!

Shame the rear adjustment is so limited/compromised. Guess I need adjustable rear toe arms to get a touch more camber on the rear (with the desired toe settings).
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