jimgiblett
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| posted on 3/9/08 at 06:31 PM |
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Plate or ATB Torsen diff
I am considering fitting my open sierra diff with either a Plate or Quaife ATB Torsen LSD.
I have been told that ATBs suffer when an inside wheel comes off the ground (eg. kerb jumping) but benefit over the plate type as they are less prone
to inducing "push understeer".
I suffered with push understeer with the Sierra viscous LSD and dont want to go back there. But what is the handling effect of an ATB suddenly
impersonating an open diff when the inside rear looses all traction?
I am thinking Surtees bend at Brands in the wet could get a little interesting 
Cheers
Jim
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britishtrident
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| posted on 3/9/08 at 07:10 PM |
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In my experience of Salsbury plate LSD on Jag E types is they are the exact opposite of what you are looking for more or less like a solid diff. They
can of course be set up to give more slip but I never tried that.
I found the Torsen diff works well on some of the FWD Rovers -- thy can also be fitted to the MGTF so ask on an MG forum.
Surprised you found the Sierra diff caused understeer -- it is fairly mild in the LSD stakes.
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motorcycle_mayhem
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| posted on 3/9/08 at 08:03 PM |
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If you found the viscous Sierra gave you understeer that you didn't want, you do NOT want a plate diff. Period. I guess that helps.
I'm very suprised the Sierra wasn't your thing, on my hairdrier Westfield it was absolutely stunning, best thing since since the
motorcycle. I've had all flavours of diff. on the Westfield (Salisbury plate - Muffett, ATB - Quaiffe, Open). The ATB isn't great, has
some strange behaviour, dangerous on road tyres, lethal in wet when one wheel breaks traction, but quite good on grippy slicks). Sierra anyday.
Your mileage may vary, particularly if you've had a blonde moment and fitted something non-bike engine up front.
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jimgiblett
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| posted on 4/9/08 at 12:03 PM |
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Hmm. Might need to reconsider the old viscous lsd. I wanted to avoid swapping driveshafts from push-in to lobro.
As far as mileage goes I am happy with my R1 motor. Already planning next years 2,000+ mile European tour 
I want to be able to get the power down up the alpine passes (on the Stelvio my mate in his LSD equipped Caterham SLR kept catching me on the hairpins
as I had so much inside wheel spin... it was wet though)
- Jim
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