Top Tips for BMW drift prep ?? - Page 3 - Drifting forum

Fundamental · 06-03-2008, 07:11

I have never driven with a welded diff on beemer as well.. just have heard of it. And people say it becomes more fragile and car is already just a track car, not recommended in daily driving as welded one will not carry on for long if daily driven.. Might be wrong, just what i have heard. Maybe somebody can share the expierience?

MJG · 06-03-2008, 07:38

I will give a glimpse of the hundreds of forum pages of information/experiences on welded diffs.

If it's welded properly (ie - not by an idiot, and cleaned properly) then it will not break. Slight understeer on turn in, purely due to the rear end having so much grip and it not wanting to break traction. When you force it to break traction you will have a lot of grip and it will be very stable and controllable, but at VERY high angles it's inability to unlock can restrict the recovery that is possible with 2-way diffs.

Daddy_D · 06-03-2008, 14:43

What is the difference between street and track? I think as long as they are both made from asphalt, you won't have problems wether you use solid bushes, welded differential, or get too much noise and vibration.
Mind you saying that, I saw my neighbour once drove a few meters in his racing car on our estate and it broke down. It turn out that car wasn't designed for street use.

Cyruz · 06-03-2008, 15:20

Welded diffs on the street are fine, it's been asked, discussed and stated 100's of times now! If your worried about noise and vibrations or tyre wear, drifting possibly isn't for you.

green-giant · 06-03-2008, 19:09

no your right MJG ive never driven with a welded diff but then only being 17 i wouldnt have driven many cars....hence asking for the info.

MJG · 06-03-2008, 20:25

No offence meant, but yeah I recommend you fit a welder rather than spunking a couple of hundred on an LSD.

Bolf · 06-03-2008, 21:11

Done 5000+miles on my :dw welded diff in my 525
.
Its not killed me or the car. Bloody good fun too.

Comeragh YB e36 · 06-03-2008, 21:54

the factory LSD as found in an m3 etc isn't nearly tight enough for drift, only have 25% lock as far as i know??? Not much good for drifting really

Weld will be reliable for sure and you'll find it much easier to fire the car side ways...

Lex · 11-04-2008, 21:22

write up here :

DWYB write up in Perf BMW

sammysideways · 11-04-2008, 23:04

so what do we reckon about diffs guys, ive got a open 325 diff here i can get welded or is a m3 diff a big handicap? thing is i would like to use my car for more than just drift but at the same time its priority is to be a drift car, whats going to be best comprimise?welded or m3 lsd?

ren_juanjo · 12-04-2008, 02:33

my stocko LSD was competetive at Eurodrift last year....

Papercutout · 12-04-2008, 13:45

I'd still say weld it.

ctb202020 · 19-04-2008, 23:27

Quote:

Originally Posted by Fundamental

Most necesary mods:
1) Diff from M3 EVO

i heard that the m3 evo diff was crap, m3 the best, any info

Mike@TDSW · 19-04-2008, 23:57

Quote:

Originally Posted by ctb202020

i heard that the m3 evo diff was crap, m3 the best, any info

M3 evo diff will only easily fit on to a M3 evo as it is bigger than all the other e36 diffs. M3 3.0 diff will fit 323/325/328 if you swap the flanges over (Tee Hee I said flange).
325 lsd is the same as a M3 3.0 lsd just with the right flanges on already. 328i sport lsd is a lazier ratio but will fit fine.

So no Evo diff is not crap it just doesnt fit lol.

Andy.w · 20-04-2008, 00:36

I saved this info:

The Evo diff is unlike any other E36 diff and as such will only fit the M3 Evo. The Evo is the only E36 to use a typ210 diff compared to the typ188 used by most other 6-pots.

If you really want to fit an Evo diff to an E36 you'll also need the Evo diff carrier, drive shafts and rear hubs AFAIK. It's a big job too and you'll need to drop the entire rear end to do the swap.

The Evo diff is 3.23:1 whereas your 325 diff (assuming it's a manual) will be 3.15:1.

Forget the Evo diff and go for the 3.0 M3 diff (LSD 3.15:1) - it is an almost straight swap....you just need to swap the input + output flanges for your 325 ones. After that it'll bolt right up

ctb202020 · 23-04-2008, 17:13

Quote:

Originally Posted by steerfromtherear

e36's m3 evo top mounts fitted the wrong way round is a really useful tip for increasing camber out front (courtesy of the Bon tbh)

anymore info on this lad?

also

Comeragh YB e36the factory LSD as found in an m3 etc isn't nearly tight enough for drift, only have 25% lock as far as i know??? Not much good for drifting really

Weld will be reliable for sure and you'll find it much easier to fire the car side ways...

so whos right?lol

ive heard the m3 diff is straight swap with flanges changed, correct. will the m3 diff be alright for drifting. this is my first rwd car and will it be alright to learn in?

any1 in ireland wanna meet up when i get a diff and help teach.lol

ren_juanjo · 23-04-2008, 17:55

the top mounts is as per STFR said, put them on the oppsite sides, with the arrows still facing forwards. job jobbed. i have done this on mine, i enjoyed it.

the m3 diff will be fine for drifting. i used it all last year and i was competetive in Eurodrift last year with the standard diff too. if youre changing the flanges, you need to make sure you've set the input flange correctly as it sits on a collapsable bearing which dictates the crownwheel/pinion backlash.

the diff is perfect for learning in.

20vWill · 23-04-2008, 18:26

Quote:

Originally Posted by ren_juanjo

if youre changing the flanges, you need to make sure you've set the input flange correctly as it sits on a collapsable bearing which dictates the crownwheel/pinion backlash.

Haha no it doesn't! Did you not learn anything whilst being raped for diff set-up Renato?

The crush sleeve between the pinion bearings isn't really re-useable, so if you are swapping input flanges then you should replace it. It holds the compression between the two pinion bearings, dictating the amount of preload on them (VERY important if you want your gearset to last).

ren_juanjo · 23-04-2008, 22:25

ah, well, there was a reason why it needed to be replaced, and i presumed it was just backlash. if its to do with bearing pre-load thats all good too. put it this way its all tricky gear stuff!

i learnt to never buy an LSD unless its working and in a casing. learning any more would have been wasted on me

Daddy_D · 24-04-2008, 00:04

Why what happened with the KAAZ? Did you not fit it at the end?

06-03-2008, 19:09	#45 (permalink)
green-giant tail slider Join Date: Jan 2008 Location: Brighton(not the gay bit!) Posts: 92	no your right MJG ive never driven with a welded diff but then only being 17 i wouldnt have driven many cars....hence asking for the info. Last edited by green-giant : 06-03-2008 at 22:03.

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06-03-2008, 07:11	#41 (permalink)
Fundamental doughnutter Join Date: Dec 2007 Location: Moscow Posts: 33	I have never driven with a welded diff on beemer as well.. just have heard of it. And people say it becomes more fragile and car is already just a track car, not recommended in daily driving as welded one will not carry on for long if daily driven.. Might be wrong, just what i have heard. Maybe somebody can share the expierience?

06-03-2008, 07:38	#42 (permalink)
MJG e30 of Death Join Date: Oct 2004 Location: Derby, England Posts: 10,517	I will give a glimpse of the hundreds of forum pages of information/experiences on welded diffs. If it's welded properly (ie - not by an idiot, and cleaned properly) then it will not break. Slight understeer on turn in, purely due to the rear end having so much grip and it not wanting to break traction. When you force it to break traction you will have a lot of grip and it will be very stable and controllable, but at VERY high angles it's inability to unlock can restrict the recovery that is possible with 2-way diffs.

06-03-2008, 14:43	#43 (permalink)
Daddy_D D1 street king Join Date: Mar 2006 Posts: 906	What is the difference between street and track? I think as long as they are both made from asphalt, you won't have problems wether you use solid bushes, welded differential, or get too much noise and vibration. Mind you saying that, I saw my neighbour once drove a few meters in his racing car on our estate and it broke down. It turn out that car wasn't designed for street use.

06-03-2008, 15:20	#44 (permalink)
Cyruz Dirty e30 Join Date: Aug 2005 Location: Bournemouth/Plymouth Posts: 1,271	Welded diffs on the street are fine, it's been asked, discussed and stated 100's of times now! If your worried about noise and vibrations or tyre wear, drifting possibly isn't for you.

06-03-2008, 20:25	#46 (permalink)
MJG e30 of Death Join Date: Oct 2004 Location: Derby, England Posts: 10,517	No offence meant, but yeah I recommend you fit a welder rather than spunking a couple of hundred on an LSD.

06-03-2008, 21:11	#47 (permalink)
Bolf BMW 24v Tramp Join Date: Dec 2005 Location: Home: Manchester / Work: All over the UK Posts: 1,582	Done 5000+miles on my :dw welded diff in my 525 . Its not killed me or the car. Bloody good fun too.

06-03-2008, 21:54	#48 (permalink)
Comeragh YB e36 tail slider Join Date: Jan 2008 Location: Waterford, Ireland Posts: 80	the factory LSD as found in an m3 etc isn't nearly tight enough for drift, only have 25% lock as far as i know??? Not much good for drifting really Weld will be reliable for sure and you'll find it much easier to fire the car side ways...

11-04-2008, 21:22	#49 (permalink)
Lex DWYB.CO.UK Join Date: Jul 2004 Location: Booostville Posts: 2,303	write up here : DWYB write up in Perf BMW

11-04-2008, 23:04	#50 (permalink)
sammysideways dorifto kingu! Join Date: Sep 2004 Posts: 7,332	so what do we reckon about diffs guys, ive got a open 325 diff here i can get welded or is a m3 diff a big handicap? thing is i would like to use my car for more than just drift but at the same time its priority is to be a drift car, whats going to be best comprimise?welded or m3 lsd?

12-04-2008, 02:33	#51 (permalink)
ren_juanjo buttercakes!! Join Date: Oct 2005 Location: fife, scotlandshire Posts: 714	my stocko LSD was competetive at Eurodrift last year....

12-04-2008, 13:45	#52 (permalink)
Papercutout dorifto kingu! Join Date: Oct 2007 Location: Nr. Oxford Posts: 835	I'd still say weld it.

20-04-2008, 00:36	#55 (permalink)
Andy.w dorifto kingu! Join Date: Dec 2007 Posts: 562	I saved this info: The Evo diff is unlike any other E36 diff and as such will only fit the M3 Evo. The Evo is the only E36 to use a typ210 diff compared to the typ188 used by most other 6-pots. If you really want to fit an Evo diff to an E36 you'll also need the Evo diff carrier, drive shafts and rear hubs AFAIK. It's a big job too and you'll need to drop the entire rear end to do the swap. The Evo diff is 3.23:1 whereas your 325 diff (assuming it's a manual) will be 3.15:1. Forget the Evo diff and go for the 3.0 M3 diff (LSD 3.15:1) - it is an almost straight swap....you just need to swap the input + output flanges for your 325 ones. After that it'll bolt right up

23-04-2008, 17:55	#57 (permalink)
ren_juanjo buttercakes!! Join Date: Oct 2005 Location: fife, scotlandshire Posts: 714	the top mounts is as per STFR said, put them on the oppsite sides, with the arrows still facing forwards. job jobbed. i have done this on mine, i enjoyed it. the m3 diff will be fine for drifting. i used it all last year and i was competetive in Eurodrift last year with the standard diff too. if youre changing the flanges, you need to make sure you've set the input flange correctly as it sits on a collapsable bearing which dictates the crownwheel/pinion backlash. the diff is perfect for learning in.

23-04-2008, 22:25	#59 (permalink)
ren_juanjo buttercakes!! Join Date: Oct 2005 Location: fife, scotlandshire Posts: 714	ah, well, there was a reason why it needed to be replaced, and i presumed it was just backlash. if its to do with bearing pre-load thats all good too. put it this way its all tricky gear stuff! i learnt to never buy an LSD unless its working and in a casing. learning any more would have been wasted on me

24-04-2008, 00:04	#60 (permalink)
Daddy_D D1 street king Join Date: Mar 2006 Posts: 906	Why what happened with the KAAZ? Did you not fit it at the end?