[beeyar]

Hi All,

I'm new to the BMW community and doing research and learning a lot about my car. My car has the DHP, but I was wondering if, let's say, I want to lower the car and switch to some kind of lowering springs. Would this affect the dynamics of how DHP works with the stock suspension?

Thanks

[PabloK]

get the dinan lowering spring- ride is same as stock

then if you want it firmer get the dinan shockware

[Tchao]

DHP acts on the shocks.

I am lowered on H&R supersports, and the springs are firmer than stock. That being so, the stock adaptive shocks are underdampen for this spring rate in Eco/Comfort mode. In Sport it is perfectly matched. If you want even less motion, go Dinan Shockware with your springs.

[beeyar]

Originally Posted by PabloK

get the dinan lowering spring- ride is same as stock

then if you want it firmer get the dinan shockware

Ok thanks! Does Dinan only make one type of lowering springs? Do you have a link for it?

[beeyar]

Originally Posted by Tchao

DHP acts on the shocks.

I am lowered on H&R supersports, and the springs are firmer than stock. That being so, the stock adaptive shocks are underdampen for this spring rate in Eco/Comfort mode. In Sport it is perfectly matched. If you want even less motion, go Dinan Shockware with your springs.

How do you like the H&R supersports? How are these compared to the Dinan lowering springs?

[PabloK]

Originally Posted by kkmoslehpour

How do you like the H&R supersports? How are these compared to the Dinan lowering springs?

you will sacrifice ride quality and lower the life of your shocks. they drop the car 2x compared to the dinan

if your going for looks go for it. but if you want a proper set up with your DHP get the dinan with shockware.

[Tchao]

Originally Posted by PabloK

you will sacrifice ride quality and lower the life of your shocks. they drop the car 2x compared to the dinan

if your going for looks go for it. but if you want a proper set up with your DHP get the dinan with shockware.

-Please cite your sources about lowering springs shortening the life of our shocks?

-Ride quality?! Its a stiffer spring rate, the ride will be naturally less compliant, I think thats why most people go for aftermarket springs, to get more performance vs stock. If someone wanted more ride quality than stock, they would get air ride or move up to a 7er boat.
BTW so will a coilover with rates higher than stock (ie all coilovers)
You mean if you are going purely from looks go buy a soft Dinan.

[PabloK]

Originally Posted by Tchao

-Please cite your sources about lowering springs shortening the life of our shocks?

-Ride quality?! Its a stiffer spring rate, the ride will be naturally less compliant, I think thats why most people go for aftermarket springs, to get more performance vs stock. If someone wanted more ride quality than stock, they would get air ride or move up to a 7er boat.
BTW so will a coilover with rates higher than stock (ie all coilovers)
You mean if you are going purely from looks go buy a soft Dinan.

Lowering springs will shorten the life of your shocks....period. I don't need to cite any sources for you, this is pretty common knowledge. The SS is composed of a Front dropped by 3.5cm (1.5inch) and rear by 3cm (1.2inch).

It will wear out the OEM shocks because the shocks will have to compress much more to absorb bumps. It's logical; the spring is shorter and therefore the shock has to travel more when you hit [any] bump. That happening all the time means accelerated wear on shocks.

Also. the OP has DHP, get the Shockware package from Dinan and it will stiffen up the ride. Dinan is a safe drop, about 50% less that the H&R, then dial it in with the shockware.

[Tchao]

Originally Posted by PabloK

Lowering springs will shorten the life of your shocks....period.....this is pretty common knowledge.

It will wear out the OEM shocks because the shocks will have to compress much more to absorb bumps. It's logical; the spring is shorter and therefore the shock has to travel more when you hit [any] bump. That happening all the time means accelerated wear on shocks.

The shock does not travel more, rather it travels less with a higher spring rate. You just shift the travel 1.5" down the curve. Yes you will have less effective shock travel than stock, adding any lowering spring will do that. It does nothing on accelerating wear more than any other spring. Stop flying off speed bumps, thats a better advice for saving top hats and shocks.

I would really stop spreading misinformation around.

Lowering springs like Eibach, H&R, ASC, Dinan, etc have been used on millions of BMWs though out history without issues.

Merry Christmas sir

[ceedawg]

I'm in agreement the H&Rs which have a higher spring rate than both the Dinan and stock springs will lower/kill the factory shock life! Ask me how I know!FACTS

[ceedawg]

Originally Posted by PabloK

Lowering springs will shorten the life of your shocks....period. I don't need to cite any sources for you, this is pretty common knowledge. The SS is composed of a Front dropped by 3.5cm (1.5inch) and rear by 3cm (1.2inch).

It will wear out the OEM shocks because the shocks will have to compress much more to absorb bumps. It's logical; the spring is shorter and therefore the shock has to travel more when you hit [any] bump. That happening all the time means accelerated wear on shocks.

Also. the OP has DHP, get the Shockware package from Dinan and it will stiffen up the ride. Dinan is a safe drop, about 50% less that the H&R, then dial it in with the shockware.

100% I never change springs without getting bilstein shocks made for
lowered springs. You will be doing the job twice. Did this on my AMG ,2 M3's,and Mitsu's!! Car will also actually handle better wirh coil overs just a little lower than stock height so that the camber does not get killed too much.

NEVR EVER go springs without changing the shocks! Best setup but expensive for our cars are the KW V2s with EDC but expensive.
So best compromise is Dinan springs with Dinan Shockwave and stock shocks unfortunately but descent .

[PabloK]

Originally Posted by Tchao

The shock does not travel more, rather it travels less with a higher spring rate. You just shift the travel 1.5" down the curve. Yes you will have less effective shock travel than stock, adding any lowering spring will do that. It does nothing on accelerating wear more than any other spring. Stop flying off speed bumps, thats a better advice for saving top hats and shocks.

I would really stop spreading misinformation around.

Lowering springs like Eibach, H&R, ASC, Dinan, etc have been used on millions of BMWs though out history without issues.

Merry Christmas sir

Definitely not trying to spread misinformation around, just trying to help out a fellow BMW enthusiast. I'm telling you a 1.5 inch drop will 100% slowly but surely cause premature wear on your shocks. Will the Dinan's .8inch drop also cause wear? Probably, but not nearly at the rate the super sports will.

If you have a car with DHP, I personally think the Dinan springs is a great compromise between, handling, looks, and wear on the shocks. Their springs alone firm up the ride nicely and if you want more, you get the shockware for $200. It's really a no-brainer....

I've messed around with several different combos and I believe this is a great set-up.

Merry Christmas to you as well.

[beeyar]

Thank you all for the information, I think i am going to do more research and look towards Dinan springs. Happy holidays all!

[PabloK]

Originally Posted by kkmoslehpour

Thank you all for the information, I think i am going to do more research and look towards Dinan springs. Happy holidays all!

Let me know if you have any questions!

my shockware install

[beeyar]

Originally Posted by PabloK

Let me know if you have any questions!

my shockware install

Hey PabloK,

The Dinan Shockware is just a software that tunes your current stock suspension? You also purchased their lowering spring or no?

Thanks,
Kevin Moslehpour

[PabloK]

Originally Posted by kkmoslehpour

Hey PabloK,

The Dinan Shockware is just a software that tunes your current stock suspension? You also purchased their lowering spring or no?

Thanks,
Kevin Moslehpour

It tunes your adaptive drive if you have that option..

yes I have the springs..

[GA/\/\/\/\A_CT]

Firmer springs will wear out shocks faster. The stronger the spring the more force it puts on the shock during rebound and increases need for damping, which is why it is recommended to use shockware (which increases damping) when using firmer springs.

[beeyar]

Originally Posted by PabloK

It tunes your adaptive drive if you have that option..

yes I have the springs..

Just bought the springs , now just waiting for them to be shipped and then installed. Just curious did you install the springs yourself or did you have a shop install them for you. If so how much was the labor if you don't mind me asking.

[GA/\/\/\/\A_CT]

I just got off phone with Turner Motorsports and they said springs on a 340xi were about a 4-6 hour job...does that sound right?

[beeyar]

Originally Posted by GA/\/\/\/\A_CT

I just got off phone with Turner Motorsports and they said springs on a 340xi were about a 4-6 hour job...does that sound right?

4-6 hours with how much per hour?

[ceedawg]

Not a difficult job to do yourself plus there is a youtube video on doing it. Get the spring compressors from Autozone.

Its a 600.00 job minimum I think. But I have always used a Saturday morning to change my own springs.

[perryo91]

Okay, so just to see if I understand. Yes getting aftermarket springs will increase wear on stock shocks because it's more of a firm "bounce" so the shock has to dampen more "force" and will wear faster.

So the safest bet is to buy both springs and shocks... If I wanted to buy dinan springs (I only want a 10mm drop) How do I know which shock will pair with it? (I don't want to buy their shockware)

Also, would this still be cheaper than buying coilovers? Or once you're buying shocks/springs you might as well buy coilovers.

Thank you!