Another Track 4th gen - Carbon bonnet & cooling plate.

Post by **Thebusofwoe** » Sun Feb 28, 2016 11:31 am

No i think your right. Think im gna have a look fo a ATR box now, what a waste of time

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Sun Feb 28, 2016 12:00 pm

RattyMcClelland wrote:Probably because it's a viscous lsd. Never understood the fuss over the m2b4

Because it all depends what you are comparing them to? The M2B4 is still considerably better than the non-LSD standard box.
I've no doubt they're not as good as the U2Q7 etc, but there is still a marked improvement over the standard box.
I can really tell the difference whenever I swapped (I'll put that in the past tense, since none are currently on the road

) between Lisa's BB1 (or my BB4) and my UKDM BB1.

Give it a bit more time thebus and you may decide to stick with it for now until a U2Q7 comes up as a bargain, or until you've sorted your other priorities on the car (rather than rush into the U2Q7 now).

Post by **newkid** » Sun Feb 28, 2016 12:12 pm

Or build your old box up?

vtectom · Post by **vtectom** » Sun Feb 28, 2016 9:04 pm

I found the M2B4 worked really well on my bb1 track car.

It hooked up brilliantly in tighter corners.

Great memories!
"Prelude - Snetterton" on YouTube

preludemanh22 · Post by **preludemanh22** » Sun Feb 28, 2016 9:16 pm

vtectom wrote:I found the M2B4 worked really well on my bb1 track car.

It hooked up brilliantly in tighter corners.
~
by Porsche

Great memories!
"Prelude - Snetterton" on YouTube

Post by **Thebusofwoe** » Sun Feb 28, 2016 9:42 pm

Ok guys thanks for the input. I appreciate it. Will give it some time and a few combe days and see how it is. It will show itself in the chicanes if it works

Post by **vanzep** » Sun Feb 28, 2016 10:34 pm

guaranteed you will be a bit quicker through the chicanes

Post by **Merlin** » Mon Feb 29, 2016 9:05 am

The viscous diff in the M2B4 is certainly not as good as the other types of diffs, I am not a fan of it. IMO there are only 2 scenarios where the LSD in it will actually lock, a big mental wheel spin or a wildly understeering exit of a corner. The viscous LSD will only lock when one wheel spins in vast excess of the other plus (the most import part) it is not a torque sensing diff.

Viscous - M2B4 & M2Z4
[youtube]w2bRb17jJ1U[/youtube]

Torsen - ATR, Quaife, Mfactory etc...
[youtube]wiq1Rk5wqds[/youtube]

Clutch pack - Kaaz etc...
I cant find that vid ATM

Post by **Thebusofwoe** » Mon Feb 29, 2016 10:29 am

Bolocks to it then. Will see if its any good on the next track day. If not its coming out.

Post by **Drax** » Mon Feb 29, 2016 11:12 am

ive run the M2B4 for years on many track days and it's done me proud

Lude Generation

Another Track 4th gen - Carbon bonnet & cooling plate.

Re: Another Track 4th gen - M2B4 gearbox fitted, not sure :/

Re: Another Track 4th gen - M2B4 gearbox fitted, not sure :/

Re: Another Track 4th gen - M2B4 gearbox fitted, not sure :/