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09-25-2013, 01:42 PM | #133 |
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Or...
Lower the car slightly with H&R springs. Little lower will also give you a bit more camber...
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02-09-2014, 07:53 PM | #134 |
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Time to bump this tread. I would like feedback from those who are running more than -2.5 in the front for track, not autocross. When I ran more than -2.5 on my 1M, the inner tread wore out before the outer. The E82 and E9X do not need as much negative camber as the E36 and E46 chassis.
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02-09-2014, 08:06 PM | #135 | |
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02-09-2014, 08:56 PM | #136 | |
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02-09-2014, 08:59 PM | #137 |
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Leave 0 toe up front. Mark the camber plates after an alignment. If you change the camber often, it will automatically increase toe. Just keep an eye on tire temps and pressures. Take a couple of hot laps, bring the tires up to temp, pull in the pits have someone take pressures and temps. You can control wear that way.
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02-10-2014, 09:20 AM | #138 | |
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It also varies wildly depending on driving style and track. Roebling road (most abrasive surface I've been on in the M3) wore out slicks about twice as fast as Barber or VIR. You'll also wear the outsides much more if you like to fling the car into corners as opposed to entering slowly. |
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02-10-2014, 09:22 AM | #139 | |
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06-04-2017, 08:49 AM | #140 |
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Reviving an old thread, but for the track I run -4* up front and around -3* in the back running on Bridgestone re71r. The car needs a lot of camber to properly handle around a track. I was running 3.3 up front and 2.1 in the back and the car had snap oversteer.
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06-04-2017, 01:43 PM | #141 | |
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Why don't you try -5/-4 and report back
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06-04-2017, 05:32 PM | #142 |
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I'm not too sure... What were your other alignment settings? Adding negative camber to older 911's could cause snap oversteer, but I hadn't heard of that for BMWs, especially the E9x chassis which is inherently very stable.
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06-05-2017, 09:37 AM | #143 |
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I don't have too much experience with 911s outside of some back roads, driven 83 sc, 964 c4, 997.1 Carrera, and 991 Carrera s, but down at roebling a month or so back, the car was running about 3* up front and 2* in the back and the whole car was showing excessive wear on the outside of all the tires. It was also snapping into turn 1 under the transition of braking to throttle as well as a few other places around the track. So, due to these results we decided to put a little more negative camber in the car to give it some more grip and better tire wear. When we first set the car we were limited to the amount of camber we could run because we had not replaced the rear camber/toe arms. I will be at Road Atlanta in a couple weeks and will report back with my evaluation of the car after adding some camber
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06-05-2017, 09:39 AM | #144 |
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-4/-3 should be enough, anymore and we will probably be losing a little to much contact with the surface of the track, I will be at road Atlanta in a couple weeks and will give an update on how it went!
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06-05-2017, 07:51 PM | #145 | |
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06-06-2017, 11:36 AM | #147 | |
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jakob66 The e9x chassis needs less static camber compared to the E36/46 cars. Fast guys are running -2.5 front and -1.8 at the back. At least I observed that anything more at the rear and it takes away from putting the power down at track out. Based on input from Malek@MRF I was able to run some of my fastest laps. What are your times at Road Atlanta? Lutfy |
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06-08-2017, 07:47 PM | #148 | |
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06-08-2017, 08:57 PM | #149 | |
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Your settings are right about where I'm at. I can't remember the exact settings that I ended up at. I have them written down but they are in a box someplace in storage until we move into the new place.
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07-18-2017, 08:09 AM | #150 |
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Just a quick update on the camber at 3.5/3, the car handles very well and tire wear is about perfect on the r888r's, car just needs a little toe out to help with understeer then it should be good to go.
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07-18-2017, 09:17 AM | #151 |
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As far as I understand slight bit of toe out in front helps turn in on the track, not understeer.
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07-19-2017, 01:23 PM | #152 | |
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Cheers, Lutfy |
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07-19-2017, 07:21 PM | #153 |
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FWIW a friend of mine tried the R888R for the first time on his GTR. He said that he felt that they were an improvement over the NT01's that they previously ran. We were on a new track so I can't make any lap time comparison. Obviously the GTR is a different animal than our E92's.
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08-10-2017, 08:12 AM | #154 |
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So I recently purchased an E92 with Camber plates from a fellow forum member. He has camber plates on it with H&R lowering springs and HD Bilstiens. He sets the camber at -2.2 for track and then back to stock afterwards as it is a daily driver.
I talked with one of my mechanic friends and he said that just adjusting the camber isn't a good idea because it affects toe and will mess the bushings. My question, if I change the camber for the track, do I need to do an alignment before and after events? If I bypass alignment, will it cause issues? |
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