05-08-2019, 09:12 PM | #1 |
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M Performance Suspension Height Adjustment Recommendations (Track)
I am installing the MPS tomorrow, and am looking for recommendations regarding ideal height adjustment with focus on track performance over street. I will have the shop corner balance the car and dial-in the following settings:
Alignment Specs (deg): Front: -2.7, 0.04 total toe in, Rear: -2.0, 0.29 total toe in Rebound and Compression: Front: Rebound Damping: 7 clicks open Pressure Stage: 4 clicks open Front: Rebound Damping: 10 clicks open Pressure Stage: 4 clicks open My thoughts are that the rear will need to come down a bit more than the front to achieve 50/50 distribution and avoid excessive squatting during braking. I would prefer to not go for the maximum drop in height and avoid issues with parking (curbs), speed bumps and steeper grades coming in/out of my garage, etc. Appreciate everyone's input! |
05-09-2019, 07:33 AM | #2 |
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I have the Dinan HAS, but found 19mm in the rear and 14mm in the front to be about as low as I could go to still fit a 285/35/19 in the rear & achieve good F/R weight balance.
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05-09-2019, 07:39 AM | #3 |
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So you went for max lowering while keeping tire fitment in mind. I could probably go even lower as I am running 255/275 combo, but don't want to sacrifice street drive ability. Shop recommended 3/4 drop up front and 1/2 back.
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05-09-2019, 07:45 AM | #4 | |
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Yeah, you could go more. Maybe 25mm rear/20mm front max, but that’s probably getting lower than necessary and will inevitably decrease suspension travel some. |
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05-09-2019, 07:45 AM | #5 |
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I have 285/35/19 rear too. Just wondering do you get rubbing when the rear compresses? Mine is noisy as hitting the wheel well when it compresses.
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05-09-2019, 07:47 AM | #6 | ||
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05-09-2019, 08:05 AM | #7 | |
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That said, the Dinan HAS has some of the softest springs out there for aftermarket setups on our cars, so you could probably add a few more mm of drop with other setups. |
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05-09-2019, 08:08 AM | #8 |
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05-09-2019, 09:40 AM | #9 |
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Zack - I also noticed that your rear toe in is more aggressive than what others run. You are at .27 and I have seen some folks complain about handling characteristics of the toe is over .20 out back. Thoughts?
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05-09-2019, 10:03 AM | #10 | |
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Stock is 0.27 deg total toe in. I’ve tried lower and went back to 0.27 deg. It’s all about personal preference and track layout, but I like a very planted rear when accelerating out of corners, it really ups your confidence. If I need more rotation in tighter/slower corners, I use my right foot for that. |
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05-09-2019, 10:27 AM | #11 |
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Thanks for the response Zack. Based on this conversation, I adjusted the desired setup settings as follows:
Alignment Specs (deg): Front: -2.8, 0.04 total toe in Rear: -2.0, 0.27 total toe in Lowering: Front: 14 mm Rear: 20 mm Rebound and Compression: Front: Rebound Damping: 7 clicks open, Pressure Stage: 4 clicks open Rear: Rebound Damping: 10 clicks open, Pressure Stage: 4 clicks open I will try different settings in the future based on handling characteristics and tire wear and keep this thread updated. Thanks! |
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