confused about diffs!

[pasbogdan]

Since we are talking about diffs now I take this opportunity to discuss the V8 diff option. I'm pretty sure it has been done before but I am a tad lazy.

I got a S2 5-speed gearbox and diff, what is the real advantage/ reason I would want a V8 rear diff?

The open needs more grip to one end to get traction at the other output.The torsen concept gets traction with less amount of grip(resistance)at one end.Or it reacts slowly compared to open and it is not spinning only the wheel with no grip instantly.

[Rocco]

I had a rear Torsen diff and never felt any difference

But to be honest I never went to the limits with the 575hp on road curves...

[DamoM]

On my standard S2 diff on circuit the car would sometimes spin a inside rear wheel under power whereas now I have more power but it doesn't so it. Given my understanding of what the guys have explained here, I would have thought that as the wheel starts to spin (but still has some resistance), the power gets fed to the outside wheel.

or I could still not be getting it!

[Ross]

Expect you're spinning up both inside wheels... With my 428hp coupe I found I'd get wheel spin on the front left off a favourite roundabout, you'd feel the diff push power to the back and she's just bite in and go.

In the wet both inside wheels would slip and it was hard to get the power down. Thats where a Torsten rear diff would have helped. As the corner opened out the car would start to grip and power moved to the rear as the inside got traction, more you get the power down at the back the more it would take - felt a bit RWD.

[jade]

What diff is open?

normally the front and back Open

[quattrostyle]

Okay cool, sounds like it's worth the upgrade then. Will get my hands on one

[DamoM]

Okay cool, sounds like it's worth the upgrade then. Will get my hands on one

They are rare as hens teeth! Quite difficult to fit also, more than a little machining but worth it.

[DamoM]

Expect you're spinning up both inside wheels... With my 428hp coupe I found I'd get wheel spin on the front left off a favourite roundabout, you'd feel the diff push power to the back and she's just bite in and go.

In the wet both inside wheels would slip and it was hard to get the power down. Thats where a Torsten rear diff would have helped. As the corner opened out the car would start to grip and power moved to the rear as the inside got traction, more you get the power down at the back the more it would take - felt a bit RWD.

Yeah that just about sums it up nicely. She just hunkers down at the rear and goes nose up!!

[Zoig]

Just FYI, the Torsen Rear diff from V8 is a lot weaker then the original Diff, many of them have been killed because of that (WOT when one of the rears is on loose surface and other on tarmac or drag launches).

[quattrostyle]

They are rare as hens teeth! Quite difficult to fit also, more than a little machining but worth it.

Thought there would be no machining involved with the swap really?

[DamoM]

Thought there would be no machining involved with the swap really?

So did I but sadly there was...

[Error404]

Fits right into a Type 89 diff

[andy10v]

So did I but sadly there was...

What car was the diff casing from?

[DamoM]

[QUOTE=Error404;752746A haFits right into a Type 89 diff [/QUOTE]

I know it's annoying!

[DamoM]

What car was the diff casing from?

It was from an S2.