Bavarian-Board.co.uk - BMW Owners Discussion Forum Homepage
Forum Home Forum Home > Technical & Model Specific Forums > BMW ///M Power
  New Posts New Posts RSS Feed - LSD upgrade, any thoughts
  FAQ FAQ  Forum Search   Register Register  Login Login

Forum LockedLSD upgrade, any thoughts
 Post Reply Post Reply Page  12>
Author
Message Reverse Sort Order
  Topic Search Topic Search  Topic Options Topic Options
piers66 View Drop Down
Senior Member II
Senior Member II
Avatar

Joined: 17-January-2004
Location: United Kingdom
Status: Offline
Points: 224 		Direct Link To This Post Topic: LSD upgrade, any thoughts
    Posted: 20-May-2006 at 04:10

Kris

 

OAP = Old age pensioner

Try Motorsport Engineering (Bill Fiddler)for height/camber/castor adj. topmounts (p/n 1228) - approx £235 + VAT (or your equivalent) for a pair. 00441257453777

Alternatively Roger at Muzzimotorsport (Austria) 00436765006172

Cheers

Piers
piers66
Back to Top
Sponsored Links


Back to Top
M3DTM View Drop Down
Senior Member II
Senior Member II
Avatar

Joined: 04-July-2005
Location: The Netherlands
Status: Offline
Points: 233 		Direct Link To This Post Posted: 19-May-2006 at 17:08

Hopefully this link still works...

http://img172.imageshack.us/img172/1401/veerpootm3a6ke.jpg

else at the bottom of this topic...

http://www.bmwcarclubforum.co.uk/forum_posts.asp?TID=30420&a mp;a mp;a mp;a mp;PN=2

John

 



Edited by M3DTM
A properly sorted E30 M3 is still 'King of the Ring'
Back to Top
M3Kris View Drop Down
Newbie
Newbie


Joined: 02-January-2006
Location: Belgium
Status: Offline
Points: 39 		Direct Link To This Post Posted: 19-May-2006 at 16:33

Dave, What is an OAP?

John, what kind of camberplates do you use; I just upgraded to Gr N suspension and am looking for some advice on camber plates.

 
Back to Top
DAWIEM3 View Drop Down
Really Senior Member I
Really Senior Member I
Avatar

Joined: 17-February-2004
Location: United Kingdom
Status: Offline
Points: 489 		Direct Link To This Post Posted: 19-May-2006 at 15:09

 

John,

 

We all started somewhere, and grew with our cars. That way your driving skills improve with the car and you don`t end up taking it back home on a low bed. You are doing it the right way, safety first, handling, braking, and then the additional power.

I would add Oulton Park to your list of UK circuits.

Regards,

 

Dave
E30 M3 Road car ( Now in Hongkong )
E30 M3 Track Car
S14 2.0L 2002 in progress
E30 C2 2.7 Alpina
E36 M3 3.2 EVO
Back to Top
M3DTM View Drop Down
Senior Member II
Senior Member II
Avatar

Joined: 04-July-2005
Location: The Netherlands
Status: Offline
Points: 233 		Direct Link To This Post Posted: 19-May-2006 at 14:57

Although this was not my topic thanks for all the reactions, particularly Dave.

@Kristian,

You could try Zandvoort next Friday, the 26th of May. This is organised by the BMW Drivers Club ( www.bmwdriversclub.nl ). They always charge around € 125.00 for a trackday at Zolder, Spa, Zandvoort, or Assen. There is another club called Tracktime (set up by a group of doctors/pharmacists) which organises days at Zolder and Zandvoort and you could always go to the Nordschleife (although I would recommend on weekdays only).

I would really love to do some trackdays in the UK, particularly Donington, Bedford and I think it's Castle Combe.

As for trackday preparation, there are some guys on this forum who seem to have gone all the way. Their cars (i.e. E30 M3s of course ) are a lot more interesting than mine. Mine is a basic 200 bhp model with standard rev limiter and still standard diff, Wilwood brakes now changing to AP 4 pots, yellow Koni shocks with Koni springs, Eibach stabilizer, camber plates, Sparco Pro2000 racing seats and Sabelt 4 point harness and rear cage from a German manufacturer (sorry forgot the name, not Wiechers or Matter).

John
A properly sorted E30 M3 is still 'King of the Ring'
Back to Top
DAWIEM3 View Drop Down
Really Senior Member I
Really Senior Member I
Avatar

Joined: 17-February-2004
Location: United Kingdom
Status: Offline
Points: 489 		Direct Link To This Post Posted: 19-May-2006 at 14:35

 

My feelings on this in brief are

Track only car - 3.91 or shorter depending on circuit. Trailered everywhere.

Track car / occational road use 3.73

Track / road car use on the ring, and driven there - 3.64

Road car occational tracked - 3.46

Road car driven by a an OAP - 3.25

 

Its basically all down to what the car is used for, your driving style, how hard you drive, engine mods, tyres etc.

40% updrade will work well in all cases except if you are an OAP, as your reactions my be a bit slow to catch it if it bites.

Regards,

 

Dave
E30 M3 Road car ( Now in Hongkong )
E30 M3 Track Car
S14 2.0L 2002 in progress
E30 C2 2.7 Alpina
E36 M3 3.2 EVO
Back to Top
Mike 90 M3 View Drop Down
Really Senior Member I
Really Senior Member I
Avatar

Joined: 08-July-2004
Status: Offline
Points: 320 		Direct Link To This Post Posted: 19-May-2006 at 11:36
Originally posted by M3DTM M3DTM wrote:

Eamo,

I normally drive my car to the circuits which means on the motorway it normally does 4000 rpm (with standard 3.25). How much will that be with the 3.64 fitted?

John

Here you go mate. (4000/3.25) x 3.64 = 4480 rpm

Rocket science

If everything seems under control, then you're just not going fast enough....
Back to Top
M3Kris View Drop Down
Newbie
Newbie


Joined: 02-January-2006
Location: Belgium
Status: Offline
Points: 39 		Direct Link To This Post Posted: 19-May-2006 at 11:08

John, so am I, south of NL, it is called Belgium!

I would also like to visit some UK tracks but I can hardly manage the ones over here...car to repair, family needs attention...etc. Do know of any trackdays coming up soon? What did you prepare on your M3 for trackdays?

Thx, Kristian

 
Back to Top
M3DTM View Drop Down
Senior Member II
Senior Member II
Avatar

Joined: 04-July-2005
Location: The Netherlands
Status: Offline
Points: 233 		Direct Link To This Post Posted: 19-May-2006 at 07:25
Originally posted by M3Kris M3Kris wrote:

John,

Which tracks are you visiting?

I'm on the Mainland, but hope to visit some circuits in the UK...

John
A properly sorted E30 M3 is still 'King of the Ring'
Back to Top
falkster View Drop Down
Bavarian-Board Contributor
Bavarian-Board Contributor
Avatar

Joined: 12-August-2003
Location: Yorkshire
Status: Offline
Points: 825 		Direct Link To This Post Posted: 19-May-2006 at 06:18
Only place I didnt look!!! Thanks mate
Z3M Roadster (gone....just...but not forgotten...yet)
E30 M3 (Toy)
Alfa 147 (just gone)
BMW 330d (new work horse)
Daimler Double 6 (no idea yet)
Back to Top
Eamo View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13-May-2003
Location: Ireland
Status: Offline
Points: 3450 		Direct Link To This Post Posted: 19-May-2006 at 06:12
Originally posted by falkster falkster wrote:

Eamo where will I get the ratios for the standard gearbox please?



here ya go boss

click link
Back to Top
falkster View Drop Down
Bavarian-Board Contributor
Bavarian-Board Contributor
Avatar

Joined: 12-August-2003
Location: Yorkshire
Status: Offline
Points: 825 		Direct Link To This Post Posted: 19-May-2006 at 06:04
Eamo where will I get the ratios for the standard gearbox please?
Z3M Roadster (gone....just...but not forgotten...yet)
E30 M3 (Toy)
Alfa 147 (just gone)
BMW 330d (new work horse)
Daimler Double 6 (no idea yet)
Back to Top
M3Kris View Drop Down
Newbie
Newbie


Joined: 02-January-2006
Location: Belgium
Status: Offline
Points: 39 		Direct Link To This Post Posted: 19-May-2006 at 05:05

Got my final quote for a reman diff with 40% LS and Z3M cover, total 580 euro ex. VAT.

John,

Which tracks are you visiting?
Back to Top
Eamo View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13-May-2003
Location: Ireland
Status: Offline
Points: 3450 		Direct Link To This Post Posted: 19-May-2006 at 04:31
Actually John try this online diff calculator

Just enter wheel size, gearbox ratio and diff ratio
Back to Top
Eamo View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13-May-2003
Location: Ireland
Status: Offline
Points: 3450 		Direct Link To This Post Posted: 19-May-2006 at 04:27
JOhn

In that scenario I think you'll be hitting arond 4800rpm instaed
Back to Top
M3DTM View Drop Down
Senior Member II
Senior Member II
Avatar

Joined: 04-July-2005
Location: The Netherlands
Status: Offline
Points: 233 		Direct Link To This Post Posted: 19-May-2006 at 04:02

Eamo,

I normally drive my car to the circuits which means on the motorway it normally does 4000 rpm (with standard 3.25). How much will that be with the 3.64 fitted?

John
A properly sorted E30 M3 is still 'King of the Ring'
Back to Top
Eamo View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13-May-2003
Location: Ireland
Status: Offline
Points: 3450 		Direct Link To This Post Posted: 17-May-2006 at 17:29
sorry - also meant to say that hardcore m3 track guys will depending on the track change diffs based on the track they are going to
Back to Top
Eamo View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13-May-2003
Location: Ireland
Status: Offline
Points: 3450 		Direct Link To This Post Posted: 17-May-2006 at 17:26
Upgrading your standard 3.25 diff to a 3.64 diff will vastly improve acceleration up through the gears however it will lower your top end speed by 10/15mph.


depending on what tracks you visit most can determine the best ratio diff to be used i.e. if the track is short, twisty with short straights then a 3.91 is perfect for you. However the down side to this is that your top end speed will reduced to around 120mph.
I found that the acceleration with this diff to be fantastic but road use was not nice as the car was at high revs most of the time.

the 3.64 while not having as much acceleration as the 3.91 was still a huge improvement over the 3.25 and a perfect compromise for regualr track and road use.

If however you have a evo2 or se which have a 3.15 diff, a 3.46 diff from the 320is would be a sensible upgrade.
Back to Top
M3DTM View Drop Down
Senior Member II
Senior Member II
Avatar

Joined: 04-July-2005
Location: The Netherlands
Status: Offline
Points: 233 		Direct Link To This Post Posted: 17-May-2006 at 16:17

Originally posted by Eamo Eamo wrote:

Assuming you have a standard car you will have a 3.25 diff. Change this to a 3.64 and it will make a world of differnece. Thats what I did with my Cecotto.

Originally posted by 215m3 215m3 wrote:

I would not go with a 3.64 diff as the gearing is wrong. Go for either a 3.46 or a 3.73.

?????

Can someone please explain?

John
A properly sorted E30 M3 is still 'King of the Ring'
Back to Top
M3Kris View Drop Down
Newbie
Newbie


Joined: 02-January-2006
Location: Belgium
Status: Offline
Points: 39 		Direct Link To This Post Posted: 17-May-2006 at 13:42

Eamo,

I now have 3.25 which seems to suit the Spa racetrack and Ring. When I drive in Germany it is max if possible and then the standard gearing gives max revs at 250 kph on the clock. For shorter gearing I opt for 205-50 tyres. But what will be the advantage of having the 40% LSD, can I accelerate harder out of corners? 

The diff upgrade would be around 400 euro + some 150 for worn bearings etc.

 
Back to Top
 Post Reply Post Reply Page  12>
  Share Topic   

Forum Jump Forum Permissions View Drop Down



This page was generated in 0.156 seconds.