07-01-2017, 02:46 PM | #67 |
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Before the camber plates, I had everything put to the OEM nominal setting. After the camber plates, I went with -2.5 front and -1.6 rear camber with all other parameters to OEM specs.
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07-01-2017, 05:43 PM | #68 | |
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07-01-2017, 09:23 PM | #69 | |
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The additional camber with the plates, that's mostly to prevent tires from prematurely cording on the track right? Or does that add any additional stability? |
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07-02-2017, 05:46 PM | #70 | |
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Imho, a lot of this thread is from owners who just want to press "'mdm mode" and then go driving. Hopefully someone from Bmw read this and realizes they need to be a lot more thoughtful on the setup of the cars coming out of the factory, have a multi step driving aid traction control and will let owners slide a bit instead of being so intrusive, and putting in an option for wider R tires from factory. The car would have gotten much better journalist reviews and prevent this type of post from happening in the first place. This isn't a Porsche GT car were owners can reasonably be expected to drive straight from the dealership to their usual race prep shop to be aligned and corner balanced right away.... |
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07-02-2017, 08:20 PM | #71 | |
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07-02-2017, 08:41 PM | #72 |
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07-02-2017, 09:49 PM | #73 |
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I agree, the M4 should have first been launched with all the CS goodies.
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07-02-2017, 10:25 PM | #74 | |
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I see posts on this thread from people stating their F8X did not feel stable at 85mph.. I have a Toyota Venza that feels pretty stable at 95-100 mph... so I'm are not even sure where some folks are coming from on a car that is the global benchmark of Grand Touring.. |
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07-04-2017, 11:20 AM | #75 |
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CANAUT, from your experience, do you think it was worth doing the camber plates without lowering the car?
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07-04-2017, 11:54 AM | #76 |
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^ if I kept my f80 I would have done camber plates on stock suspension to save the outer shoulder of front tires. I was about to cord the stock tires in 3-4 DEs
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07-04-2017, 12:15 PM | #77 | |
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I had camber plates on my E46 and E92 with an otherwise stock suspension. The main driver for me getting plates is to improve tire wear at the track. The only reason I went with springs on my M4 is for looks (I was not very fond of that "front fender gap"). I got a very good deal on an Eibach kit (spring rates are quite close to stock) and installing them at the same time as the camber plates meant install cost at almost nothing.
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07-05-2017, 09:16 PM | #78 |
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I haven't felt much understeer in this car, I can't think of a time at all honestly. I drive in the warm months without traction control. What I have noticed is the lack confidence in the rear of the car, you initiate turn in, get near the apex and add some throttle, the thing always has a transition point that feels like the rear is going to break free. I agree with CanAut, I think this is the solid mounted subframe.
Funny story, I took my teenager out 2 months ago after just putting my summers back on to teach her how to drive a manual. We were in parking lots for a few hours as she tried to learn. Unfortunately for me, the ambient temp was unusually cold for the time of year(~28 deg F), as we headed home, I was explaining to her throttle position versus available traction, I was going to swing the rear out a little out of a roundabout, well bad move in cold temps and PSS, immediately it swung out to far and I could feel the fronts lose traction. I knew there was no saving it, off the road we went and settle in a depression on the side the road. Didn't hit anything, but the depression did a number. The point of the story, I just got the car back yesterday and took it out for some spirited driving today and that feeling we all have felt is now scaring the crap out of me, that rear transition to throttle input mid corner. To the point I have it MDM for the first time in 2 years of ownership. It didn't feel very confidence inspiring today. Yet I was following a new Camaro around a local lake(ie, some fun roads) on my sportbike and he was in it, driving pretty insanely for a Camaro. Granted he lived in the area I'm sure and knows the roads, where I didn't, but he was going pretty good and looked to be pretty dam planted. |
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07-06-2017, 09:40 PM | #79 |
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just curious, in my 435 on the last stretch of highway (see map below) before my exit it is possible to hit triple digits (so I'm told) and on the offramp marked with the finger one can go about 40 tops without a lot of tire squealing, but the car feels stable. I think the "recommended" speed limit is 25, but those are yellow signs, highly conservative, geared to minivans and the like
what could I expect in an M4? I would think 40-45 on the offramp wouldn't be a problem. I actually think I did it many moons ago in an E46 M3 w/ SMG. we see posts of people taking their new M's on the autobahn at triple digit speeds without complaints or problems. and, of course, many track their cars. so what's up with all the talk of instability?
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07-06-2017, 10:46 PM | #80 | |
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After adding coil-overs all (and I do mean ALL) the rear-end nastiness is gone.
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07-06-2017, 10:53 PM | #81 |
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The stock suspension has great compression tuning (which shines on smooth roads), it's the rebound tuning (which is the reaction of the shocks being upset from bad roads, i.e. dips, broken pavement, elevation changes, etc.) that causes the instability. Whether the rear-end is upset from heavy braking or upset mid-corner, the stock shocks does not keep the rear-end controlled and stable.
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07-11-2017, 12:35 AM | #83 |
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07-11-2017, 02:11 AM | #84 | |
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It feels like the front of mine is toeing out....it seems very eager to turn in. |
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07-11-2017, 02:07 PM | #85 | |
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After going with a lower spring rate in the rear and removing some pre-tension off the front spring, it's much improved. The damping is AWESOME, it recomposes after being upset like RIGHT NOW!!! I might play with further lowering spring rates a few mths down the road, but for now I have other things do to first. I have it aligned with pretty much stock settings and did a corner balance and the car is very neutral in the corners, with just a tad oversteer if provoked. Excellent turn-in and balance in the corners. What I learned in this process is proper set-up and having someone who knows what they are doing with proper equipment is key. This is a quality kit, but it needs to be setup right. I unfortunately ended up paying a lot more in the end by having to have things fixed and changed after the fact because of poor install and set-up.
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07-11-2017, 06:35 PM | #86 |
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Yes, I kept the toe to nominal OE settings.
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07-12-2017, 10:07 AM | #88 | |
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