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      10-02-2014, 02:56 PM   #1
BigMacSmallFries
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KW Sleeve Kit for F80 M3 Arrived

UPDATE: First car on bimmerpost with KW sleeve kit installed on F80 M3. Pics below.

Last edited by BigMacSmallFries; 10-05-2014 at 05:26 PM..
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      10-02-2014, 03:16 PM   #2
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We will be installing a set next week and will post more info!
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      10-02-2014, 03:52 PM   #3
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Sean, it would so great if you guys could test the spring rate range (assuming they are progressive), if at all possible; TIA.
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      10-02-2014, 03:53 PM   #4
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yes, there is shockingly little data on these

-spring rate?
-how spring rate was determined?
-spring length?
-minimum drop vs stock (assuming max perch height)

to name a few
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      10-02-2014, 04:07 PM   #5
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Quote:
Originally Posted by KennyPowers View Post
yes, there is shockingly little data on these

-spring rate?
-how spring rate was determined?
-spring length?
-minimum drop vs stock (assuming max perch height)

to name a few
I msg'd a vendor about these and he told me to save my money and buy springs.
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      10-02-2014, 04:07 PM   #6
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Quote:
Originally Posted by KennyPowers View Post
yes, there is shockingly little data on these
That's because they are springs, not shocks
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      10-02-2014, 04:07 PM   #7
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If my calculations are correct based on the H&R TUV submission paper that was posted few weeks ago, the F82 super sport springs at 150# front and 350# rear, I do not know if this makes any sense though, little weird for me to see such wide range in a front heavy car.
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      10-02-2014, 07:56 PM   #8
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Quote:
Originally Posted by dmk08 View Post
I msg'd a vendor about these and he told me to save my money and buy springs.
Funny, a vendor told me the complete opposite
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      10-02-2014, 08:15 PM   #9
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Quote:
Originally Posted by gmcconn535 View Post
That's because they are springs, not shocks

I see what you did there!
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      10-02-2014, 10:13 PM   #10
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Quote:
Originally Posted by FTS View Post
If my calculations are correct based on the H&R TUV submission paper that was posted few weeks ago, the F82 super sport springs at 150# front and 350# rear, I do not know if this makes any sense though, little weird for me to see such wide range in a front heavy car.
It's all about motion ratio. That sounds way too soft, though.
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      10-03-2014, 11:19 AM   #11
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Quote:
Originally Posted by gthirtyfizle View Post
Funny, a vendor told me the complete opposite
They would... it's 3 times the price of springs.

Better get coilovers.
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      10-03-2014, 11:25 AM   #12
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Quote:
Originally Posted by Boostin FD View Post
They would... it's 3 times the price of springs.

Better get coilovers.
My thoughts exactly.
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      10-03-2014, 05:16 PM   #13
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Quote:
Originally Posted by Sean@PSI View Post
We will be installing a set next week and will post more info!
.

Last edited by BigMacSmallFries; 10-05-2014 at 05:27 PM..
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      10-03-2014, 09:39 PM   #14
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Quote:
Originally Posted by BigMacSmallFries View Post
Measured the difference between front and rear wheel gap. It is 1.7".

In other words if the front is dropped 1.7" and the rear is left at the same height as OEM the wheel gap will be exactly the same.

I don't have the technical info, but is it possible to drop the front 1.7" and keep the rear at the same ride height 0.0"?

Don't know the ranges available.

Thanks!
I did this on my old e92 m3. I only lowered the front with eibachs... Never had any issues and loved the stance.
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      10-04-2014, 11:43 PM   #15
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Installed the springs yesterday. Best of all the ride was somewhat floaty before, now it feels like the the E92 M3 again. Looking forward to installing sway bars from Dinan when they are released. Want to make the car give feedback, and ride like the E92 M3 again. I think with the sway bars it will be very similar. Highly recommend this!

Last edited by BigMacSmallFries; 10-05-2014 at 05:44 PM..
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      10-05-2014, 06:06 AM   #16
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OP... great to hear that you're happy with the kit.

Do you have the active or the passive suspension?
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      10-05-2014, 09:34 AM   #17
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Quote:
Originally Posted by rubber_ducky View Post
OP... great to hear that you're happy with the kit.

Do you have the active or the passive suspension?
Active on the F80. I owned both active and passive on the E9x M3s.

The excitement that was partially lost with the more capable suspension/chassis of the new car is simply just toned down a bit and masked. Install these springs and the car really starts to feel like the E92 M3 again. Looking forward to installing the sway bars.

Last edited by BigMacSmallFries; 10-05-2014 at 05:30 PM..
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      10-05-2014, 02:27 PM   #18
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I'm a little confused, you think the e92 suspension was better?

The f8x is a more race oriented suspension with a much firmer chassis and solid mounted subframe
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      10-05-2014, 04:43 PM   #19
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Quote:
Originally Posted by KennyPowers View Post
I'm a little confused, you think the e92 suspension was better?

The f8x is a more race oriented suspension with a much firmer chassis and solid mounted subframe
No, biggest improvement of the F8x M3 over the old one is the suspension, easily. What's lost is the road feel (crevices, cracks, small bumps) because the suspension glides over everything making the car feel floaty and slightly disconnected, not to mention the electric steering. Same story with the new 991s compared to the 997s. Just had a joy ride in my car on some winding roads, these springs bring back all that road detail that the OEM setup hides. Surprised how much more feedback the KW springs give through the chassis compared to the OEM springs. Highly recommend this.

Last edited by BigMacSmallFries; 10-05-2014 at 05:51 PM..
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      10-05-2014, 05:24 PM   #20
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We took some accurate measurements based on a full tank of gas, and about 50lbs of weight in the trunk that I always have in the car.

Front needs to be dropped 1.5" so that the top of the wheel edges to the fender flares are the same front and rear. This is the result. Did not want to touch the rear ride height because it is already very low. We confirmed this at the end by remeasuring the heights.

Drop in front: 1.5"
Drop in rear: 0.0"

Note: 20mm/18mm spacers front/rear. No rubbing.
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Last edited by BigMacSmallFries; 10-05-2014 at 05:55 PM..
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      10-06-2014, 12:44 PM   #21
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^^That looks perfect.
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      10-06-2014, 12:57 PM   #22
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looks GREAT! how's the overall ride quality?
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