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2010 2011 BMW 5 Series Forum F10 F10 Technical Topics Wheels / Tires / Suspension / Brakes ACS vs. Dinan springs
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      05-17-2012, 04:29 PM   #1
Klecha man
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ACS vs. Dinan springs

Does anyone have any feedback on either of these springs. I'm trying to decided between the two and I was told the Dinan only has a 1/2 inch drop. I'm more concerned with the ride quality and how well it works with the electronically controlled suspension. Any feedback will be greatly appreciated.
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      05-17-2012, 07:57 PM   #2
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I put Dinan springs on mine last weekend. I chose Dinan cuz i live on a dirt road and i thought ACS would be too much drop.

I have adaptive damping and ARS - no issues. In fact, the handling all-around is so much better. I can live with it in normal mode now ( I came out of an S5, and hated the stock 550 ride - I had to always bump up to "sport", then it was ok ).

As fror drop, it may not have fully settled, but it appears to have a bit more droop in the rear. Overall very happy, but will be monitoring how it settles.

I have no comparison to ACS.
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      05-17-2012, 08:21 PM   #3
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I appreciate the feedback... Do you mind if i ask how much they charged to install it? The local shop wanted about 7 labor hours and a re-alignment for a cost of about $700 plus parts.
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      05-17-2012, 09:20 PM   #4
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I did it w a buddy. Took us about 6 hours, but the first side (drivers) took 4.5, and the other took 1.5, once we figured out how to do it. If it's a competent shop, I would think 5 hrs max plus alignment. That's for an x-drive, which is definitely more difficult.
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      05-18-2012, 03:21 PM   #5
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ACS also drops more in the rear.
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      09-03-2012, 11:29 PM   #6
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Just did the Dinan springs installed by local BMW dealer, I was deciding between ACS & Dinan. Prefer the ACS drop which I think it's about one inch all around for RWD 550i, but since the local BMW dealer gave me a great deal on Dinan parts and labor I decided to go with Dinan and have a peace of mind that the install is done by BMW dealer.

My initial feel is that the Dinan springs drop was too minimal (only around 1/2 inch) and in the Comfort & Sport mode I cannot really tell much of difference vs. the stock, i.e. still very comfortable ride with some body roll on corner. I have not tried in Sport+ mode and driven the car too aggressively yet.

Anyone else out there with Dinan and can share their thoughts, thanks.
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      09-04-2012, 09:11 PM   #7
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I have ACS on my 550i and I think they're a little low, but it handles wonderfully. I was going to go with Dinan next time, but not after reading your post. Sport+ mode doesn't stiffen the suspension any more, only changes transmission upshifts.
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      09-05-2012, 05:02 AM   #8
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Quote:
Originally Posted by tcandmm View Post
Just did the Dinan springs installed by local BMW dealer, I was deciding between ACS & Dinan. Prefer the ACS drop which I think it's about one inch all around for RWD 550i, but since the local BMW dealer gave me a great deal on Dinan parts and labor I decided to go with Dinan and have a peace of mind that the install is done by BMW dealer.

My initial feel is that the Dinan springs drop was too minimal (only around 1/2 inch) and in the Comfort & Sport mode I cannot really tell much of difference vs. the stock, i.e. still very comfortable ride with some body roll on corner. I have not tried in Sport+ mode and driven the car too aggressively yet.

Anyone else out there with Dinan and can share their thoughts, thanks.
Any noises (at all) after the installation? like taptaptap sounds?
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      09-06-2012, 07:44 PM   #9
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Quote:
Originally Posted by lmaleke View Post
Any noises (at all) after the installation? like taptaptap sounds?
No noise at all, the install was done very well by my local BMW dealer.
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      09-07-2012, 03:02 AM   #10
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No noise at all, the install was done very well by my local BMW dealer.
Thanks
Some members here are hearing taptaptaptaptap noises where others dont...
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      09-07-2012, 11:01 PM   #11
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I'm officially waiting 6 months until this all hopefully clears up as I can almost guarantee the install will be way overpriced in Sacramento, CA and I will get a fracking rattle to boot.
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