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Lower front spring rates with Ohlins
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12-25-2013, 01:04 PM | #1 |
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Lower front spring rates with Ohlins
I'm thinking about upgrading from my current ZSP springs with Koni FSDs to the Ohlins R&T struts/dampers with Swift springs, but I'm struggling with the front rates. I've done a lot of reading and my current thinking is to go for 224 lb/in fronts and 672 lb/in rears, which gives roughly equal wheel rates with slightly higher rear natural frequency to maintain the factory flat ride, but front rates this low seem quite unusual...
The car is pretty much exclusively street driven and I already have uprated sways, Quaife and rear subframe bush inserts. Does anyone have any thoughts or alternative recommendations, please? Many thanks! Sean
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12-25-2013, 01:28 PM | #2 |
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I went with 336F and 672R Swift springs when I installed my Öhlins last year. Very happy with this setup. 224 sounds soft I'd check with Harold for his recommendation. You will love your Öhlins!
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12-25-2013, 04:58 PM | #3 |
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Definitely check with Harold. On our cars you generally want the rear spring rate to be double the front rate. Not sure how firm you want your springs overall, but I'd have to say that you'll end up with a great suspension.
Last edited by jjellyneck; 12-25-2013 at 09:05 PM.. |
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12-26-2013, 02:06 AM | #4 |
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I'm considering some Ohlins myself and may stick with the springs they come with. With that said, what sway bars would be best to upgrade to? Has anyone tried the cobb front/rear bars? I do have quaife lsd and rear subframe bushings....... Should I just go wit m3 front sway or get the rear too
or does somebody have the Ohlins wit a better balanced swaybar set up to recommend? |
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12-26-2013, 07:31 AM | #5 |
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Stick with Öhlins front springs but consider substituting Swift 672 pound rear springs in place of the Öhlins rear springs. M3 front Sway only... no need to add M3 rear sway. Once again check with aHarold.
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12-26-2013, 10:09 AM | #6 | |
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12-26-2013, 10:34 AM | #7 |
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I am running 396 lbs up front with the ohlins and 672 lbs. I was running 336 lbs upfront with koni/tckline. I could not see going softer than 336. I like the 396 better though.
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12-26-2013, 11:45 AM | #8 |
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Thanks. How do you find the ride quality on the street? As well as the obvious handling improvements from the dampers, I'm looking to get rid of the crashing and 'twitchiness' over bumps that comes with the stock suspension, so I'm planning on doing the M3 front control arms (and possibly the rear uppers) at the same time...
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12-26-2013, 02:51 PM | #9 |
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I think, as does Harold, that those spring rates are too low. Your car will be too soft and will most likely bottom out if you lower the front from a stock ride height (as well as bind). As I have said a bunch of times, spring rates are all subjective. Some people mind xxx while others like xxx.
You can go with whatever spring rate you want, however I believe you won't be that excited about your new spring rate. -Mike P.S. I roll around on 560lbs in the front and I like em (on ASTs though). |
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12-26-2013, 02:59 PM | #10 | |
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12-26-2013, 03:46 PM | #11 |
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I ran 336 front and 672 rear with my Ohlins and it was night and day compared to the standard M-sport set-up in regards to comfort and performance.
I now run 400 front and 800 rear with all M3 arms, bushes and H&R roll bars front and rear. It's just superb, and so much nicer to drive and still far more compliant than standard. It rides with a real quality feel, with no crashing over potholes or that twitchy feeling as if the rear end is moving about.
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12-26-2013, 05:37 PM | #12 |
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12-26-2013, 08:44 PM | #13 | |
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12-27-2013, 07:20 PM | #14 |
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No, no need, I'm running 9 clicks from full hard, and the shock is controlling the rebound no problem at all.
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Ohlins DFV with 400/800 Swifts // M3 arms and bushes // H&R anti-roll bars // Modified top mounts allowing -1.5 deg front camber // 19" MORR VS8.2 // 235/265 Pilot Super Sports // Wavetrac // Evolve remap.
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01-02-2014, 05:44 PM | #15 |
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01-02-2014, 06:53 PM | #16 |
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If you get higher rate swift springs for the rear like say 672#, is the swift spring actually 1" shorter than the Ohlins kit spring? If so, does that give you 1" less shock travel in the rear? Can you get the same length Swift spring but just stiffer? Or how do you recommend doing it?
Last edited by nikitino25; 01-02-2014 at 07:01 PM.. |
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01-03-2014, 07:23 AM | #17 |
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I took Mike and Harold's advice and am running with 560lb fronts and 800lbs rear with my Moton Clubsport shocks. I don't find it too hard at all. In fact even with full M3 suspension arms and solid subframe bushings it's more comfortable than stock when on the minimum compression setting on the shocks.
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01-05-2014, 08:03 AM | #18 | |
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10 inch 672# rear Swift springs will leave ride height way too high.
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01-05-2014, 11:45 AM | #19 |
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Yeah, 9" 672 or 800 rear swifts are perfect. They allow stock ride height if required with plenty of suspension travel, or extremely low (too low!) if adjusted to extremes.
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01-22-2014, 09:17 PM | #20 | ||
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