E30 Zone

Can anyone tell me if i can still get the ass end of my car out without a LSD. Not adventurous enough to have a go yet, but no point in trying if it wont do it... ? ? ?

you can do it but its fookin hard to maintain especially if u give it too much

you can flick the end out but i rememebr when i had open diff wrongness it feels extremely unsure about what its going to do!

find a gravel car park mate best option

is it an expensive thing to cahnge to a LSD form a normal one do you know... ?

what car have you got? second hand LSDs go for about 250

apparently the swap is not that hard!

getting it to step out should be easy enough if you are aggressive with it, but you will really struggle to maintain it without an LSD, ive certainly never managed it personally

chip-3door wrote:getting it to step out should be easy enough if you are aggressive with it, but you will really struggle to maintain it without an LSD, ive certainly never managed it personally

il second that

Just to back up Dan really... gravel and wet conditions make it easier to get and keep the arse out.

hoshy wrote:Just to back up Dan really... gravel and wet conditions make it easier to get and keep the arse out.

still bloody hard to maintain one with open diff wrongness though

once you have driven an open diff and then drive a slipper the difference is unbelieavable. the car feels more sure of what it doing, you can feel whats going to happen and it lays power down a lot better. it really is a must have device imo, certainly should be high up on anyones mod list

Thanks for your replies. I'll give up thinking about that one then till i get my LSD fitted. Mine is only a 325i with the M-Tech options, but no LSD. Anyone know where i can buy a good LSD from ?

what year dude; year is important

pre 87' youl need a 3.63

post 87 you need a 3.91

1989 on an F plate...

3.91 lsd then you need to search for

luckily they r not that rare!

Excellent. Thanks for all your help.

glad to help

there's usually slippers going on eBay and the zone. ~250 is about the going rate. keep your eye on the for sale section. wanted ads don't usually get much response but do speak to pacerpete, I beleive he has a couple of 3.64 diffs.

two common options are 3.64 and 3.91.

3.64: better top speed, less acceleration (good motorway economy)
3.91: better accel, less top speed (not so good motorway economy)

I don't think the differences are anything that you'd cry over.

Dan, I have managed in the wet to get full revolutions of a roundabout

hoshy wrote:
Dan, I have managed in the wet to get full revolutions of a roundabout

was that before of after you hit the lamp post

Cotty180 wrote:

hoshy wrote:
Dan, I have managed in the wet to get full revolutions of a roundabout

was that before of after you hit the lamp post

hehe. Before. Maybe I got a bit cocky

is that with an open diff hoshmeister?

was indeed an open diff mate. It only happened once that I got more than a full revolution but I got loads of 3/4s

u nutcase! iv only just nailed half revolutions with an LSD!

i take it that was in the wet?

oh yeah, defo in the wet. thing is with an open diff is that things go wrong then one wheel start to slip more than the other, all of the the torque then moves over to the wheel with the least resistance, then the wheel without drive finds lots more grip and hey presto you've snapped back into line... on low friction surfaces like wet and gravel both wheels lose grip and thus have rougly equal resistance (keeping them both spinning) until eventually the the resistance changes low on the unloaded wheel and higer on the loaded (driving/drifting) wheel. and, as mentioned above, the wheel with least resistance will "steal" all the power thus ending the drift rather abruptly. Gay, but hey that's life

So to drift on an open diff you need to reduce the grip (to keep the resistance on the wheels the same for as long as possible) or just go faster - which is far to scary for me...

discalimer: that's how it happens in my head. I'd love to be put right but I think that's correct.

just go faster lol i like it hosh!

318-is wrote:just go faster lol i like it hosh!

it's true

hoshy wrote:there's usually slippers going on eBay and the zone. ~250 is about the going rate. keep your eye on the for sale section. wanted ads don't usually get much response but do speak to pacerpete, I beleive he has a couple of 3.64 diffs.

two common options are 3.64 and 3.91.

3.64: better top speed, less acceleration (good motorway economy)
3.91: better accel, less top speed (not so good motorway economy)

I don't think the differences are anything that you'd cry over.

Dan, I have managed in the wet to get full revolutions of a roundabout

What about mid range on the two different diffs?

stevetigger wrote:

hoshy wrote:
3.64: better top speed, less acceleration (good motorway economy)
3.91: better accel, less top speed (not so good motorway economy)

What about mid range on the two different diffs?

the lower ratio has better acceleration across the board.

hoshy wrote:the lower ratio has better acceleration across the board.

So, on a good 2.5 putting out 190bhp you think the 3.91 is best?

I'm probably not qualified to give an opinion on what's best as I'm a lowly m40b18 boy.

Having said that I'm going to anyway I'd personally take a 3.91 as I'd be happy to trade off the the cruising economy for the extra torque for when I need to sustain my superdrifts





*hoshy wakes from a rather damp 325 dream*

318-is wrote:what year dude; year is important

pre 87' youl need a 3.63

post 87 you need a 3.91

m8 its not important at all.
yes its what was fitted, but it doesnt matter what diff u fit.

the 3.64 will give better mpg whilst the 3.91 will give better acceleration.

when bmw facelifted the e30 they also lowered the compression ratio.
this blunted the performance a touch - so to make up for it bmw changed the diff ratios.
a 3,91 on an early car tho wud make a pretty quick e30

so did facelift '25s come with a 3.91 open?

hoshy wrote:so did facelift '25s come with a 3.91 open?

2dr and 4dr 325 had 3.73 i think ?

Tourings and Cabs had 3.91 open

Chaos wrote:

318-is wrote:what year dude; year is important

pre 87' youl need a 3.63

post 87 you need a 3.91

m8 its not important at all.
yes its what was fitted, but it doesnt matter what diff u fit.

the 3.64 will give better mpg whilst the 3.91 will give better acceleration.

when bmw facelifted the e30 they also lowered the compression ratio.
this blunted the performance a touch - so to make up for it bmw changed the diff ratios.
a 3,91 on an early car tho wud make a pretty quick e30

i stand corrected by a true hero

318-is wrote: i stand corrected by a true hero

sarcy sod

no sarcasm meant!

i just wondered why bmw out 3.64 on tec 1 sport and 3.91 on tec 2 sport?

anyone know?

318-is wrote:
i just wondered why bmw out 3.64 on tec 1 sport and 3.91 on tec 2 sport?

anyone know?

yeah.

when bmw facelifted the e30 they also lowered the compression ratio.
this blunted the performance a touch - so to make up for it bmw changed the diff ratios.

was it really necesary to change the ratio that much?

why blunt the performance?

m20s dont tickle my fancy u no !