Joined: Aug 2017 Posts: 381 Threads: 16
Reputation:
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Location: Port Elizabeth, Sunny South Africa
Car type: '26 Chummy, '28 Top Hat, '33 Type "65", single seaters
Hi Guys
In the eternal quest for a bit more grunt out of the supercharged special, does anyone have or re-make a lower crown wheel & pinion ratio for the D type diff ??
I'm running the standard 5.25, what I'm after is the Van or Nippy 5.65 or one of the '50's period special ratio's in between....
Anything like that exist on Yonder Isle ?? I've trawled through the Treasured Supplier websites but couldn't find anything...
Aye
Greig
Joined: Aug 2017 Posts: 381 Threads: 16
Reputation:
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Location: Port Elizabeth, Sunny South Africa
Car type: '26 Chummy, '28 Top Hat, '33 Type "65", single seaters
Thanks Mark.... I totally missed that one
Cheers
Greig
Joined: Aug 2017 Posts: 3,372 Threads: 105
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Location: Darkest Bedfordshire
Tony Leslie's got a 5.65 crown wheel on eBay if you have a pinion to go with it....
There was a Regent 5.35(?) pair popped up at a couple of autojumbles last summer , I'm afraid I don't recall whose stall it was on - they are still out there though.
Joined: Aug 2017 Posts: 3,329 Threads: 372
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Car type:
Foolish question, but are the pinions completely matched sets... or do they still technically fit when the crown increases by a tooth or so?
Joined: Aug 2017 Posts: 3,372 Threads: 105
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Location: Darkest Bedfordshire
04-06-2019, 12:27 PM
(This post was last modified: 04-06-2019, 12:43 PM by Chris KC.)
I asked a very similar question a while back Jon!
You need the right pinion, the tooth shape is different.
(That is to say, you could only use a pinion from another 8/45 pair.
Ideally you don't mix and match parts from different pairs, but they will work - the main probable downside being noise).
Joined: Dec 2017 Posts: 189 Threads: 8
Reputation:
1
Location: East Yorkshire
Car type: Ruby sports trial special .
Can someone tell me if austin 7 diff
Is the same as big 7 I know the shafts are a different lenth I'm in the process of building
At trials car from parts and need a lower
Diff ratio sorry for butting in !
My problem I ask questions that other people don't like?
Like have you got that for an investment or for fun?
Joined: Mar 2015 Posts: 5,435 Threads: 231
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Location: Scotchland
I fitted one of David’s 5.67 : 1 ratio sets to my Pearl about 8 years ago - I am very pleased with it and would suggest it is a good modification if you want to keep going in top gear on longer hills etc.
Joined: Aug 2017 Posts: 172 Threads: 1
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Location: Richmond, Texas, USA
Steve, you can't get 5.67 with a 7 tooth pinion. David Cochrane's website quotes 6 teeth, 6:34 to be precise.