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      07-25-2014, 05:07 AM   #23
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Quote:
Originally Posted by nicks3 View Post
Gap to lowest part of m performance front splitter is 11 cm underneath and approx 13 cm to front lip.
Cheers Dude
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      07-25-2014, 06:31 AM   #24
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Quote:
Originally Posted by teaston View Post
Yes indeed the ACS springs will still be better, as they are 15mm lower than the sdrive m sport suspension, so will be at least that much lower than the new xdrives.
Guys don't want to be the bearer of bad news but had my acs springs fitted last Friday and measured ground to wheel arch before and after 705mm front before fitting and 692 mm rear after fitting 697mm front and 667mm rear
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      07-25-2014, 06:42 AM   #25
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Quote:
Originally Posted by jezm3 View Post
Guys don't want to be the bearer of bad news but had my acs springs fitted last Friday and measured ground to wheel arch before and after 705mm front before fitting and 692 mm rear after fitting 697mm front and 667mm rear
This would suggest that the rear drop is indeed a fair bit more than the front and its not just our imagination. I was under the impression that the drop would be equal all round?
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      07-25-2014, 07:03 AM   #26
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All points towards there being a technical reason why the front is not dropped the same amount on an xDrive. At a guess, BMW had to increase ride height to get to the Lobro joint 'sweet spot'. Who cares as long as it rides OK?
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      07-25-2014, 07:08 AM   #27
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Quote:
Originally Posted by NISFAN View Post
Who cares as long as it rides OK?
Would bother me a little if it was ass down, would prefer the front\rear balance to remain close to stock but lower. Perhaps tweaking the springs to raise the rear by 10mm or so might give a nicer look, although I wouldn't sacrifice handling improvements for that.
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      07-25-2014, 11:48 AM   #28
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Thanks for the info OP!

what was the over cost? if i went into a local BMW dealers, would they be able to supple and fit these?
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      07-25-2014, 12:58 PM   #29
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Quote:
Originally Posted by nicks3 View Post
Had these fitted yesterday and have to say that I am very impressed. To those that worry about it riding like the old E90 and being very hard, don't worry. Drove it 170 miles today over back roads and motorways and it is perfect. I echo the thoughts of everyone else in that this is how the car should have been from BMW. A perfect compromise between sporty and comfortable. Yes there is a slightly larger gap between the front wheel and arch (more noticeable sometimes than others depending on ground level etc) but if you look at BMW's in general they all have that and I understand ACS designed it that way for added handling prowess. Thanks Lorcan and AC Schnitzer.













Just as a matter of interest nick was wondering if you could measure your arch to floor measurements to compare with mine to see if the f31 ends up lower at the back cos of additional weight? By the way car looks great.
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      07-27-2014, 06:35 AM   #30
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Forged wheels or engine upgrade?

Quote:
Originally Posted by Lorcan View Post
On Monday we fitted a set to another 335dx, owned by an ex traffic cop. Trained to the highest level, with 20 years of pursuit driving under his belt and a sensitive back injury. His verdict: "Transformed in every respect". He even commented that the car felt markedly quicker due to not wasting energy compressing the stock springs, like a fully suspended mountain bike wastes energy bouncing when pedalled on a smooth road. He's now seriously looking at the performance upgrade, exhaust and our 8.3kg forged 19" alloys...
The question I find myself asking is would the forged wheels be a better performance upgrade than the Engine Management upgrade? The wheels would be just over £2000 more.
I realise they would improve overall handling, braking, cornering, provide less wear and tear on suspension system, stronger, look better ( personal preference I know ), lighter by at least 18Kg overall compared to the equivalent cast alloys by AC so therefore improve performance. Including theoretically, better power transference to the road from the engine also. The science boffins at AC also talk about reduced gyroscopic forces multiply this reduced weight effect further improving performance. AC Germany don't provide exact figures and I can't find anyone else who does. But i did notice the difference in performance just with the springs, sharper, more zippy, as though the car had lightened considerable..so....

The question is,
How much difference would you feel? And how much more is the weight saving over the standard M Sport 335d F30 wheels we all have opted for? More than 18kg I would think as they look as though they have substantially more metal on them.

Engine upgrade with AC or their forged wheels? Any thoughts please?
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      07-27-2014, 06:47 AM   #31
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@Lorcan - what's the view on spacers? I'm hoping to fit mine this week for cosmetic reasons but should I expect handling difference with the springs setup?
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      07-27-2014, 02:21 PM   #32
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Quote:
Originally Posted by MarkG335 View Post
@Lorcan - what's the view on spacers? I'm hoping to fit mine this week for cosmetic reasons but should I expect handling difference with the springs setup?
Most ACS wheels come with hubcentric adaptors (a spigot ring and spacer combined) to correct the offset of a wheel for the target car. In itself, it doesn't matter if this material forms part of the wheel or comes as a spacer, the end result is the same - a slightly wider track that gives a minimal handling advantage but looks nice. ACS wheels always run a more aggressive offset than BMW or Alpina for example. It's part of the sporty ACS look and stance.

We don't sell spacers for use with standard wheels so I can't really comment on them.
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      07-27-2014, 02:40 PM   #33
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Quote:
Originally Posted by Lorcan
Quote:
Originally Posted by MarkG335 View Post
@Lorcan - what's the view on spacers? I'm hoping to fit mine this week for cosmetic reasons but should I expect handling difference with the springs setup?
Most ACS wheels come with hubcentric adaptors (a spigot ring and spacer combined) to correct the offset of a wheel for the target car. In itself, it doesn't matter if this material forms part of the wheel or comes as a spacer, the end result is the same - a slightly wider track that gives a minimal handling advantage but looks nice. ACS wheels always run a more aggressive offset than BMW or Alpina for example. It's part of the sporty ACS look and stance.

We don't sell spacers for use with standard wheels so I can't really comment on them.
Right answer

I'll take pictures and report back..

Many thanks.
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      07-28-2014, 01:56 PM   #34
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Lorcan, thinking of having the springs fitted and wondering which dealer you would suggest around West Yorkshire. Bought the car from Sandal at Wakefield, so would probably go to them unless you have a better recommendation.
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      07-28-2014, 02:27 PM   #35
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Quote:
Originally Posted by cjm9 View Post
Lorcan, thinking of having the springs fitted and wondering which dealer you would suggest around West Yorkshire. Bought the car from Sandal at Wakefield, so would probably go to them unless you have a better recommendation.
They are happy to do it, Sandal Wakefield quoted 620 all in.
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      07-28-2014, 03:29 PM   #36
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Can see me with a set of these springs before long.
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      07-28-2014, 03:37 PM   #37
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Quote:
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Can see me with a set of these springs before long.
I read somewhere it's now mandatory
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      07-28-2014, 03:40 PM   #38
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Quote:
Originally Posted by MarkG335 View Post
I read somewhere it's now mandatory
don't tell me that!
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      07-28-2014, 03:43 PM   #39
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Quote:
Originally Posted by Aldur View Post
The question I find myself asking is would the forged wheels be a better performance upgrade than the Engine Management upgrade? The wheels would be just over £2000 more.
I realise they would improve overall handling, braking, cornering, provide less wear and tear on suspension system, stronger, look better ( personal preference I know ), lighter by at least 18Kg overall compared to the equivalent cast alloys by AC so therefore improve performance. Including theoretically, better power transference to the road from the engine also. The science boffins at AC also talk about reduced gyroscopic forces multiply this reduced weight effect further improving performance. AC Germany don't provide exact figures and I can't find anyone else who does. But i did notice the difference in performance just with the springs, sharper, more zippy, as though the car had lightened considerable..so....

The question is,
How much difference would you feel? And how much more is the weight saving over the standard M Sport 335d F30 wheels we all have opted for? More than 18kg I would think as they look as though they have substantially more metal on them.

Engine upgrade with AC or their forged wheels? Any thoughts please?
Light weight wheels make quite a difference, and as you point out, works in many dimensions, not just acceleration (like engine mods).

However, BMW actually use quite light wheels these days, and the M405 (for example) are flow formed and very light for their size. Probably better bang for buck than ACS wheels?

If you are going down the wheel weight route, then make sure you get serious about choosing light weight tyres too, which means ditching Run flats.
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      07-29-2014, 01:48 AM   #40
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Quote:
Originally Posted by ozwol View Post
They are happy to do it, Sandal Wakefield quoted 620 all in.
Yep, Sandal seem to be the best in that area. Ask for Lee Ogden.
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      07-29-2014, 02:44 AM   #41
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Quote:
Originally Posted by NISFAN View Post
Light weight wheels make quite a difference, and as you point out, works in many dimensions, not just acceleration (like engine mods).

However, BMW actually use quite light wheels these days, and the M405 (for example) are flow formed and very light for their size. Probably better bang for buck than ACS wheels?

If you are going down the wheel weight route, then make sure you get serious about choosing light weight tyres too, which means ditching Run flats.
Thanks Nisfan,

At this I'm moment trying to get actual weights of the current wheels 19' M star spoke style 402M almost all of us have on our 335d from BMW UK. The local dealer/service dept could not help.

I prefer run flats due to the safety aspect, but i'm aware of weight and comfort benefits returning to non run flats. I don't really wish to go up to 20" Double spoke style 405M as all reports I have heard say they look great, but the ride is very hard. Which I don't want. Otherwise I would probably go for them as I would get some discount from the dealer also. Would be interesting to see what they weigh though compared to the ACS ones.

We will see :-)
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      07-29-2014, 12:49 PM   #42
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Quote:
Originally Posted by Lorcan View Post
Yep, Sandal seem to be the best in that area. Ask for Lee Ogden.
Thanks Lorcan, rang today and just my luck Lee on hols for the next couple of weeks. Had a quote sent through which was more than the £620 quoted to Ozwol but I am sure they will come down lower.

Ozwol, many thanks for the heads up on cost. Presume the £620 included VAT? Did you have it done?
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      07-29-2014, 03:20 PM   #43
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Quote:
Originally Posted by cjm9 View Post
Thanks Lorcan, rang today and just my luck Lee on hols for the next couple of weeks. Had a quote sent through which was more than the £620 quoted to Ozwol but I am sure they will come down lower.

Ozwol, many thanks for the heads up on cost. Presume the £620 included VAT? Did you have it done?
Yes it was fully inclusive of springs, labour and VAT. I bought the car there so maybe that helped with the price?

I decided against in the end as (for me) the car is absolutly fine with stock suspension.
Tbh if i didnt know from the forum it had se suspension i would never have known from the ride.
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      07-29-2014, 04:18 PM   #44
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Quote:
Originally Posted by Aldur View Post
Thanks Nisfan,

At this I'm moment trying to get actual weights of the current wheels 19' M star spoke style 402M almost all of us have on our 335d from BMW UK. The local dealer/service dept could not help.

I prefer run flats due to the safety aspect, but i'm aware of weight and comfort benefits returning to non run flats. I don't really wish to go up to 20" Double spoke style 405M as all reports I have heard say they look great, but the ride is very hard. Which I don't want. Otherwise I would probably go for them as I would get some discount from the dealer also. Would be interesting to see what they weigh though compared to the ACS ones.

We will see :-)
This website will help with the wheel weights


http://felgenkatalog.auto-treff.com
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