Mr Tidy's MC Thread - New Boots for Wales!

"M" Specific discussion
Post Reply
blobslosak
Member
Member
Posts: 212
Joined: Sun Oct 19, 2014 1:10 pm

Mr Tidy's MC Thread - Major Progress.

Post by blobslosak » Tue Apr 28, 2020 7:00 pm

abar121 wrote: Mon Apr 27, 2020 8:50 pm How much droop travel do you have left on the coil-overs after topping them out?

Too little can be pretty disastrous for both ride and handling.

Have you tried to slack off the damping, particularly compression? Or tried different springs with them?
How much droop do you recommend? I've just raised my ride height 17mm rear and 15mm front to OEM heights on BC racing coilovers. Not worried about the rear but front is close to the top of the threads. You can adjust the height through the shock body independent of spring preload though, should have done that.
IMG-20200425-WA0004.jpeg
IMG-20200425-WA0004.jpeg (92.52 KiB) Viewed 1551 times
IMG_20200425_134335.jpg
IMG_20200425_134335.jpg (277.56 KiB) Viewed 1551 times

User avatar
abar121
Member
Member
Posts: 390
Joined: Tue Apr 26, 2011 9:14 pm

Mr Tidy's MC Thread - Major Progress.

Post by abar121 » Tue Apr 28, 2020 9:18 pm

blobslosak wrote: Tue Apr 28, 2020 7:00 pm
abar121 wrote: Mon Apr 27, 2020 8:50 pm How much droop travel do you have left on the coil-overs after topping them out?

Too little can be pretty disastrous for both ride and handling.

Have you tried to slack off the damping, particularly compression? Or tried different springs with them?
How much droop do you recommend? I've just raised my ride height 17mm rear and 15mm front to OEM heights on BC racing coilovers. Not worried about the rear but front is close to the top of the threads. You can adjust the height through the shock body independent of spring preload though, should have done that.

....
That's a good question and I'm afraid I don't have the answer. On lighter cars that I have more experience with, you want a minimum of about 5cm on the rear, say of a Lotus Elise. Any less than that and it will be terrible on anything other than the smoothest of roads. Track use is completely different.

Most road cars usually have a ton of droop standard. The OP's complaints about the ride, plus having his coil-overs topped out, set the alarm bells ringing.
'07 Z4M Interlagos Blue. All options except extended leather.

blobslosak
Member
Member
Posts: 212
Joined: Sun Oct 19, 2014 1:10 pm

Mr Tidy's MC Thread - Major Progress.

Post by blobslosak » Tue Apr 28, 2020 10:00 pm

You can see on my second photo the rear has a lot of droop so that looks ok. Front not so sure. But something I'll consider as I drive it more, cheers.

User avatar
abar121
Member
Member
Posts: 390
Joined: Tue Apr 26, 2011 9:14 pm

Mr Tidy's MC Thread - Major Progress.

Post by abar121 » Wed Apr 29, 2020 11:01 am

Cool. Yeah looks like plenty on the rear at least. Great that you have ride height adjustment and not just preload too.

For anyone wishing to measure droop, it's really simple. Measure the ride height, jack that corner of the car up until the tyre is just in contact with the ground (i.e. slight drag on the ground) and take the difference. The spring should still be under some compression.
'07 Z4M Interlagos Blue. All options except extended leather.

jonstar
Newbie
Newbie
Posts: 24
Joined: Tue Sep 02, 2008 10:42 am
Location: Surreyish

Mr Tidy's MC Thread - Major Progress.

Post by jonstar » Thu Apr 30, 2020 5:54 pm

Mr Tidy wrote: Mon Apr 27, 2020 9:14 pm Good question, and being a newbie to all this sort of stuff I had to look it up. :roll: And the simple answer is I don't know how much droop travel I have!

I'm inclined to think the ride is firmer than I want for a long trip although I don't think it is any worse than when the car was lower, but of course I haven't been able to do a long trip, although the handling seems very good.

I haven't tried other springs on these shocks. In the event I do decide to use the Eibach springs that came with the car I'd get a set of Bilstein or KW dampers (recommendations welcome) so the coil-overs remain a complete kit.
Lovely car! I think the standard suspension can use some improvement, may be interested in yours if you sell.

Did you remove the CDV, if so can you feel much difference?

Mr Tidy
Lifer
Lifer
Posts: 15610
Joined: Wed Jul 02, 2014 12:18 pm
Location: Sandhurst, Berkshire

Mr Tidy's MC Thread - Major Progress.

Post by Mr Tidy » Thu Apr 30, 2020 7:24 pm

jonstar wrote: Thu Apr 30, 2020 5:54 pm Lovely car! I think the standard suspension can use some improvement, may be interested in yours if you sell.

Did you remove the CDV, if so can you feel much difference?
Thanks, I'll try to bear that in mind if I do swap onto something else.

Ross did remove the CDV, but it's hard to tell as I haven't done 20 miles yet. :(
Coupes because stunning!
Current - Silver Grey MC, Imola Red heated Nappa & carbon trim. Aeros, H & R Coil-overs, 224s, Strut brace, Nav, cup-holders, DSP Hi-Fi, pdc, cruise, MFSW, no CDV! E90 330i daily
Gone - Montego Blue
Gone - Ruby Black

jonstar
Newbie
Newbie
Posts: 24
Joined: Tue Sep 02, 2008 10:42 am
Location: Surreyish

Mr Tidy's MC Thread - Major Progress.

Post by jonstar » Thu Apr 30, 2020 8:16 pm

Yeah good point! Looking forward to the next update.

Manxman1950
Newbie
Newbie
Posts: 11
Joined: Mon Apr 24, 2017 2:06 pm

Mr Tidy's MC Thread - Major Progress.

Post by Manxman1950 » Sat May 09, 2020 3:45 pm

On the subject of suspension alternatives, I ran the B12 kit on my 335is, together with poly subframe bushing inserts and a Wavetrac LSD and the car was transformed. After soliciting advice from respected local Z4M owners I opted for the KWv3s for my roadie, which I picked up from Demon Tweeks during one of their periodic sales and have been very happy with these. The B roads around the Niagara peninsular are similar to my recollection of the Herts area, during my Caterham days, so some improved suppleness is appreciated.
2006 M roadster, Interlagos Blue/black extended leather/carbon trim. Strong strut brace, Stromung exhaust, Apex 8.5/9.5 EC7 rims, KW V3s,Vibratech/Rogue engine/transmission mounts. 30k miles and counting....

Mr Tidy
Lifer
Lifer
Posts: 15610
Joined: Wed Jul 02, 2014 12:18 pm
Location: Sandhurst, Berkshire

Mr Tidy's MC Thread - Major Progress.

Post by Mr Tidy » Mon May 18, 2020 10:37 pm

abar121 wrote: Mon Apr 27, 2020 8:50 pm How much droop travel do you have left on the coil-overs after topping them out?

Too little can be pretty disastrous for both ride and handling.

Have you tried to slack off the damping, particularly compression? Or tried different springs with them?
So a quick update on this as I had the trolley jack out today to swap the wheels on my 3 Series, and once I'd finished I put it under my MC.

Even topped out on the H & R coil-overs I've got about 70mm of droop on the front and 80mm on the rear, so I would have thought that should be enough.

The damping on these units isn't adjustable, only the ride height. I haven't tried different springs because the previous owner bought them as a complete set so I'd expect the springs to be matched to the shocks like a B12 kit.

Now I can use it to go further than the shops I'll see how they feel, but I'm starting to think the Eibach springs that came with the car may be the way to go for a bit of compliance and add some new shocks. Then I need to decide which shocks for longer trips and the occasional B road blast. Bilstein, KW or others? Any suggestions would be appreciated. :thumbsup:
Coupes because stunning!
Current - Silver Grey MC, Imola Red heated Nappa & carbon trim. Aeros, H & R Coil-overs, 224s, Strut brace, Nav, cup-holders, DSP Hi-Fi, pdc, cruise, MFSW, no CDV! E90 330i daily
Gone - Montego Blue
Gone - Ruby Black

Mr Tidy
Lifer
Lifer
Posts: 15610
Joined: Wed Jul 02, 2014 12:18 pm
Location: Sandhurst, Berkshire

Mr Tidy's MC Thread - Major Progress.

Post by Mr Tidy » Tue May 19, 2020 8:04 pm

Well I took it for an MOT today, and it passed with no advisories - happy days!

So I came home the long way round and topped it up with Tesco Momentum - it was only £1.069 a litre. :)

Then when I got home I pulled Fuse 40 out again so I don't lose any headlamp washers parts. After messing about with the alignment of the glovebox catch I finally got it so that the catch worked properly, so it won't be falling open every time I hit a pothole any more. :lol:
Coupes because stunning!
Current - Silver Grey MC, Imola Red heated Nappa & carbon trim. Aeros, H & R Coil-overs, 224s, Strut brace, Nav, cup-holders, DSP Hi-Fi, pdc, cruise, MFSW, no CDV! E90 330i daily
Gone - Montego Blue
Gone - Ruby Black

User avatar
LeeZ4MR
Lifer
Lifer
Posts: 4105
Joined: Sun Sep 02, 2012 2:36 pm
Location: Lincs

Mr Tidy's MC Thread - Smaller Steps Now

Post by LeeZ4MR » Thu May 21, 2020 12:21 pm

Mr Tidy wrote: Tue May 19, 2020 8:04 pm So I came home the long way round and topped it up with Tesco Momentum - it was only £1.069 a litre. :)
I usually use Tesco 99 all the time in my 370Z, but the closest one to me is 13 miles away in the opposite direction to the food shop I was going to yesterday. So I had to put shell V power in instead at 1.26 a litre! :cry:

Shell have always been absolute robbing gits for sure!
Current...BMW F82 M4 Coupe 2018
370Z Roadster 2011
Merc GLC350d 2017

Previous.. Audi TTS 2012
640d 2012
330i 2006
Z4MR 2006
E92 M3 2009
X5 4.8iS 2004
TVR Cerbera 4.5

User avatar
MrPT
Lifer
Lifer
Posts: 4699
Joined: Sun Oct 21, 2012 7:44 pm
Location: Bucks/Oxon

Mr Tidy's MC Thread - Smaller Steps Now

Post by MrPT » Thu May 21, 2020 2:16 pm

LeeZ4MR wrote: Thu May 21, 2020 12:21 pm
Mr Tidy wrote: Tue May 19, 2020 8:04 pm So I came home the long way round and topped it up with Tesco Momentum - it was only £1.069 a litre. :)
I usually use Tesco 99 all the time in my 370Z, but the closest one to me is 13 miles away in the opposite direction to the food shop I was going to yesterday. So I had to put shell V power in instead at 1.26 a litre! :cry:

Shell have always been absolute robbing gits for sure!
Ah yeah but every 4 million fillups you get a free Costa coffee and 50p off a Ginsters, so it’s totally worth it.
2008 Z4MC: SG/Imola | sub-flimper spec | +OEM CSLs | +KWv3 | +TMS RTABLs | +VT mounts | +Eventuri | +OEM strut brace | +DB9 front BBK | +cruise - probably looks a bit like your one
2006 Z4 2.5si: gone

User avatar
LeeZ4MR
Lifer
Lifer
Posts: 4105
Joined: Sun Sep 02, 2012 2:36 pm
Location: Lincs

Mr Tidy's MC Thread - Smaller Steps Now

Post by LeeZ4MR » Thu May 21, 2020 4:26 pm

MrPT wrote: Thu May 21, 2020 2:16 pm
LeeZ4MR wrote: Thu May 21, 2020 12:21 pm
Mr Tidy wrote: Tue May 19, 2020 8:04 pm So I came home the long way round and topped it up with Tesco Momentum - it was only £1.069 a litre. :)
I usually use Tesco 99 all the time in my 370Z, but the closest one to me is 13 miles away in the opposite direction to the food shop I was going to yesterday. So I had to put shell V power in instead at 1.26 a litre! :cry:

Shell have always been absolute robbing gits for sure!
Ah yeah but every 4 million fillups you get a free Costa coffee and 50p off a Ginsters, so it’s totally worth it.
:lol:
Current...BMW F82 M4 Coupe 2018
370Z Roadster 2011
Merc GLC350d 2017

Previous.. Audi TTS 2012
640d 2012
330i 2006
Z4MR 2006
E92 M3 2009
X5 4.8iS 2004
TVR Cerbera 4.5

mmm-five
Lifer
Lifer
Posts: 11876
Joined: Sun Nov 30, 2008 1:03 pm
Location: South Liverpool
Contact:

Mr Tidy's MC Thread - Smaller Steps Now

Post by mmm-five » Thu May 21, 2020 4:27 pm

MrPT wrote: Thu May 21, 2020 2:16 pmAh yeah but every 4 million fillups you get a free Costa coffee and 50p off a Ginsters, so it’s totally worth it.
It's every 10 fill-ups, and in-between the trigger points you get a random 10p off a tank off a £2 bottle of 20p/bottle water.

...and you get to offset your carbon emissions (I think they buy credits from Tesla) - so my 330D is cleaner than my Z4MC :thumbsup:
Trigger’s Z4MC
Some bits now over 163,000 miles, some less than 1,000 miles.
Individual Ruby Black, Individual extended champagne leather, plus many options

Image

User avatar
abar121
Member
Member
Posts: 390
Joined: Tue Apr 26, 2011 9:14 pm

Mr Tidy's MC Thread - Smaller Steps Now

Post by abar121 » Thu May 21, 2020 5:20 pm

OP, good news on the MOT and the droop seems reasonable.

Did you notice any effect removing the CDV?

Cheers.
'07 Z4M Interlagos Blue. All options except extended leather.

Post Reply