Koni FSDs on a 1 series

[wa128]

thez99...sorry but the H&R OE sport springs do indeed produce a rake. I've had the Koni FSDs with H&R OE sports for two years now on my 128. Measurements using Revelate's method are:

13.25" front, 13.75" rear

Revelate, you are correct about the FSDs raising the car just a bit. I had the FSDs installed first before the H&Rs. I didn't take any measurements but something told me that the profile of the car just did not seem right. I could swear the front looked higher than stock. If you go with FSDs then lowering springs are a must if just for visual appeal.

[opvaulet]

Switched to FSD from M sport shocks, retaining stock springs. Much better ride ride. Did not raise ride height. Also used BMW PS bumpstops for more travel. Sweet combination with e90M3 front sway bar.

[thez99]

Originally Posted by wa128

thez99...sorry but the H&R OE sport springs do indeed produce a rake. I've had the Koni FSDs with H&R OE sports for two years now on my 128. Measurements using Revelate's method are:

13.25" front, 13.75" rear

Revelate, you are correct about the FSDs raising the car just a bit. I had the FSDs installed first before the H&Rs. I didn't take any measurements but something told me that the profile of the car just did not seem right. I could swear the front looked higher than stock. If you go with FSDs then lowering springs are a must if just for visual appeal.

Hmm, H&R says only .25" lower in the front, and yet urs is .5"+ lower in the front, even on fsd's?

[wa128]

Here is the H&R website.

http://hrsprings.com/scripts/appguid...Find3&MakeID=4

[320Devil]

Originally Posted by wa128

thez99...sorry but the H&R OE sport springs do indeed produce a rake. I've had the Koni FSDs with H&R OE sports for two years now on my 128. Measurements using Revelate's method are:

13.25" front, 13.75" rear

Revelate, you are correct about the FSDs raising the car just a bit. I had the FSDs installed first before the H&Rs. I didn't take any measurements but something told me that the profile of the car just did not seem right. I could swear the front looked higher than stock. If you go with FSDs then lowering springs are a must if just for visual appeal.

With the exception of the raked looked, I'm fairly happy with my FSD H&R OE Sport Combo. I initially had the FSD's paired with Eibachs. The car looked great, but like the OP stated, when the car bottomed out the FSD's did not respond well and it bounced....especially with a two or more people in the car. In summary, I would not reccomend the FSD and Eibach combo and if you don't like the raked look, I wouldn't do the H&R OE Sport combo either. If I had to do it a 3rd time, FSDs with the BMW performace springs is the way I'd go.

[hhuynh14]

Originally Posted by 350zpilot

With the exception of the raked looked, I'm fairly happy with my FSD H&R OE Sport Combo. I initially had the FSD's paired with Eibachs. The car looked great, but like the OP stated, when the car bottomed out the FSD's did not respond well and it bounced....especially with a two or more people in the car. In summary, I would not reccomend the FSD and Eibach combo and if you don't like the raked look, I wouldn't do the H&R OE Sport combo either. If I had to do it a 3rd time, FSDs with the BMW performace springs is the way I'd go.

are you also running a shorter bumper stops?

[thez99]

Ive had several people (from distributors of these products) tell me that unless your slammed, like past 1.75", theres no reason for the shorter bump stops. And otherwise, the only times it would be noticeable would be if you went over a huge ass bump or pothole, otherwise, no noted difference in performance. Same was also confirmed about switching to the dinan rear shock mounts, just not necessary unless your slammed. FSD's and H&R oe's should be fine. If ANYTHING, maybe just shave a little off the oem bump stops

[hhuynh14]

interesting....I have fsd and eibach with shorter bumper stop and I have no issues with the bottoming out...

[thez99]

Originally Posted by hhuynh14

interesting....I have fsd and eibach with shorter bumper stop and I have no issues with the bottoming out...

I never said you wouldnt have issues with shorter stops, i said its pretty much pointless to have them unless you are slammed, then yes you have the chance of bottoming and the ride could be bouncy in the rear cuz ur so low. But a .75-1" drop with the fsd's will not warranty getting shorter stops, just not necessary.

[djpeetur]

can you just cut the stock bumpstops? local bmw dealership doesnt carry any bumpstops that i need from e85 or e36 etc.

[thez99]

Can we please get a professional opinion on whether shorter or new bumpstops are actually necessary for optimal performance with an FSD/H&R oe sport setup??

Cuz I REALLY just dont think its necessary to go with shorter stops unless youre actually slammed. But I wanna hear from someone who really knows this shit, as opposed to someone who just bought new stops cuz her heard it was needed and now supports doing so cuz he already spent the time n money on em..

[timhatimay]

Originally Posted by thez99

Can we please get a professional opinion on whether shorter or new bumpstops are actually necessary for optimal performance with an FSD/H&R oe sport setup??

Cuz I REALLY just dont think its necessary to go with shorter stops unless youre actually slammed. But I wanna hear from someone who really knows this shit, as opposed to someone who just bought new stops cuz her heard it was needed and now supports doing so cuz he already spent the time n money on em..

Click on Suspension Travel. They had a video about it as well somewhere.
http://www.dinancars.com/university/

Please note the BMW Performance Suspension which is a minor/moderate drop also includes shorter bumpstops. The Dinan kits do as well. They are professionals (although admittedly professionals trying to sell a product). I am not a professional...however, think about it logically:

If you lower your car without increasing the distance between the tophat and the lower spring perch, that lowering is taking place across the compressed spring. If you have less distance with the same bumpstops, you have now limited your suspension travel. I've hit my bumpstops many times on the road on bumps, and its possible that I ride on them during large compressions. So now you will be hitting them and possibly riding on them prematurely. Surely this will be more exaggerated on a aggressively lowered car, but probably a likely situation on even a moderately lowered car. Get them from an e36 (or is it e46?) or the performance kit, and you won't have to worry about it. I doubt you'd notice everyday, but if you are getting a new suspension in hopes of increased performance, there is no reason to forgo a $20 part just because.

My unprofessional opinion,

Tim

[djpeetur]

e46 sport package bumpstops or m3 bumpstops

[timhatimay]

Originally Posted by djpeetur

e46 sport package bumpstops or m3 bumpstops

The bumpstops I was thinking about are in this thread:

http://www.m3post.com/forums/showthr...light=bumpstop

Those are the e36 M3 bumpstops, and apparently the same as those used on the Dinan suspension kits (for the M3). Somebody mentioned that BMW PS bumpstops are not hard to find, so if you're planing to get these springs and FSD's thats probably the perfect match. Alternatively, you could probably shave the stock ones as well.

I don't know what, if any, consequences will come of using an e36 or shaved bumpstop with H&R (or any other springs), so use it at your own risk. Best bet is to consult a professional on these boards (HP Autowekrs comes to mind). They should give you the best information about it, and HP is very honest and fair. Maybe they will feel that with a slight drop it is unnecessary. But when replacing the suspension the time and money to install different bumpstops will be nothing. It would be expensive to try and do it afterwards if you are not satisfied.

Good luck,

Tim

[thez99]

K so where do i get my hands on these PS bumpstops, and how much shorter are they?
Im actually considering going with the koni yellows instead for sportier handling, was instructed that I can set em to 50% from soft and theyll give me much better handling without compromising comfort much at all.

[320Devil]

Stock ones.

Originally Posted by hhuynh14

are you also running a shorter bumper stops?

[djpeetur]

U can cut stock bumper stops ?

[opvaulet]

yes.