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      12-05-2014, 07:56 PM   #1
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F80 M3 H&R springs/ M4 H&R Springs

I lowered my car with the F80 M3 specific springs 50474-6(blue springs) The back is very low. Also the ride is pretty stiff/rough. I feel everything on the road thru wheel. My friend just picked up his M4 he got the M4 H&R sport springs 50474 (red). The M4 rides much better than my springs. Less road feel softer more comfy. I notice the difference more in the back. My back is much flatter stiff. His feels soft. Plus he said his M4 stock had plenty body roll now with springs doesn't. My M3 never had body roll. So I'm guessing the M3 is stiffer chassis/suspension?

He also mention that there's 2 holes in back for spring placement/seat. He said my spring is on the lower side if it was on the other hole I will get more spring travel also said it will be alittle higher and softer?
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      12-07-2014, 09:04 PM   #2
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Anyone? 😩
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      12-07-2014, 10:38 PM   #3
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Chassis is slightly stiffer on the M3, doubt you'll feel the difference but technically it is stiffer.
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      12-07-2014, 10:40 PM   #4
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Quote:
Originally Posted by edwinm3
Chassis is slightly stiffer on the M3, doubt you'll feel the difference but technically it is stiffer.
So I guess it's the spring installation or springs in general??
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      12-07-2014, 10:46 PM   #5
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might wanna look and see if springs were installed correctly, never heard of two different locations were springs would sit, sounds like a possible incorrect install
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      12-08-2014, 07:05 PM   #6
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Quote:
Originally Posted by edwinm3
might wanna look and see if springs were installed correctly, never heard of two different locations were springs would sit, sounds like a possible incorrect install
We thought it was 2 settings because the lower control arm has 2 holes for the rubber spring seat.. However we double check and the seat only can go one way (hole closer to the strut)
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      12-08-2014, 08:40 PM   #7
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Well we figured out the problem.. The dust boot on this car is not a separate pc. So when I installed spring I pull down the boot and it the top where spring sits the rubber came off. So it was spring hitting the plastic part of strut mount.
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      12-08-2014, 09:07 PM   #8
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so how's the drop now? better?
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      12-08-2014, 09:57 PM   #9
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Hated springs on our F80, very bouncy.
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      12-08-2014, 10:38 PM   #10
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Quote:
Originally Posted by edwinm3 View Post
so how's the drop now? better?
Still very stiff, Bouncy when in sport plus.
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      12-08-2014, 11:07 PM   #11
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Quote:
Originally Posted by Bmanny View Post
Still very stiff, Bouncy when in sport plus.
bouncy = no good, poor handling
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      12-08-2014, 11:08 PM   #12
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Quote:
Originally Posted by edwinm3
Quote:
Originally Posted by Bmanny View Post
Still very stiff, Bouncy when in sport plus.
bouncy = no good, poor handling
Yeah thinking about sleeve kit now
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      12-08-2014, 11:24 PM   #13
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Quote:
Originally Posted by Bmanny View Post
Yeah thinking about sleeve kit now
honestly, sleeve overs won't be that much more difference over springs because you're still running the stock shocks and the lower you go the worst it gets, have you considered KW V3's coilovers? They're just awesome!
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      12-08-2014, 11:26 PM   #14
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Last time I ran coils were on my 335i and E46 M3. After bmw came with EDC I just used springs. I'm coming from a F12 M6 comp pkg. so I'm missing some comfort.
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      12-09-2014, 12:31 AM   #15
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Quote:
Originally Posted by Bmanny
Last time I ran coils were on my 335i and E46 M3. After bmw came with EDC I just used springs. I'm coming from a F12 M6 comp pkg. so I'm missing some comfort.
KW's are very good both on the street and very capable on the track
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      12-24-2014, 06:41 AM   #16
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They should just ban springs outright. Fucks up the cars handling completely and the drop ratios front to rear are a fuck up also and upset balance

Retarded process indeed but then what do you expect for a $450 mod on a $80k car?

Coil overs are cheap at $2300 not sure why people opt for this shitty route and the answers are always the same. Worse handling, bouncy etc. About 50% of people who fit sprigs hate them and move to a coilover and stay sold for all future cars. The other 50% don't know how a proper car handles and are indifferent and just like the look and have no issue with the crap handling as they don't know any better
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      12-24-2014, 11:01 AM   #17
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shit. I just got H&R Sport and this thread makes me nervous
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      12-24-2014, 12:14 PM   #18
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I am ready to take mine off 😩
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      12-24-2014, 12:45 PM   #19
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I'm glad I waited. I think Swift will have the best option for springs. Can't wait for those. Lol
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      01-01-2015, 10:06 AM   #20
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H&R M4 convertible springs

Hi does anyone know if the coupe and convertible use the same lowering spring?
I was think of ordering this part number? 28878-1
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      01-01-2015, 11:38 AM   #21
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Quote:
Originally Posted by Chipm4
Hi does anyone know if the coupe and convertible use the same lowering spring?
I was think of ordering this part number? 28878-1
Probably not, different rate springs, fitment will probably be the same but different part numbers due to their difference in rates, verts are heavier in the rear.
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      01-01-2015, 06:14 PM   #22
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OP are you running wheel spacers? Do you think 15/20 mm spacers will fit front and rear?
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