Sierra 3.14 diff (or CWP)

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Shortshift
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Sierra 3.14 diff (or CWP)

Looking for a good 3.14 ratio CWP set or complete 7" Sierra diff.  Anyone have one surplus to requirements please?

James

Hampshire West AR
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Building a bike engined car James?  These diffs are like rocking horse poo.

Shortshift
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Wouldn't a BEC need a fd ratio from the other end of the spectrum??

Looking for the CSR!

James

Richard Price
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Wouldn't a BEC need a fd ratio from the other end of the spectrum??

 No. Most bike engine/'box assemblies have a primary reduction.

'Busa has a 1.596:1 primary reduction, so, even with a 3.14:1 diff, top speed is still limited...

Shortshift
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Ah, thanks Richard.  The primary reduction explains it.

Anyway, back on topic - anyone got one??

James

Alan Reeves
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James i put one in a 6 speed CSR and it was great, no LSD

at the time it was £800 from .....in kent , just forgotten the name of the Diff gurus

 

test

 

Alan Reeves
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Phil at Road and Race

test

 

Shortshift
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Yes, that's the plan.  Replace the 3.38(?) unit that's in the car at the moment with the longer 3.14 ratio to give more relaxed cruise performance with the 6-speed gearbox. 

Phil and Ollie at Road and Race can't help at present, hence my posts to see if there are any 3.14's available on the market.

James

 

Steve Wilkins
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Hi James,

Saw this while browsing eBay - https://www.ebay.co.uk/itm/204190234549.

Steve

Richard Price
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Shortshift
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Thanks chaps - saw both of these on ebay and actually followed up on one, but the lack of provenance is preventing me from going ahead.  If I could find one from a Club member I'd be able to buy with some confidence, but £1000 plus is too much to risk on a punt.

Thanks for pointing them out, though.

James