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speedo angle drive

PostPosted: Mon May 16, 2016 12:23 pm
by Elanconvert
hi all
does anyone know if the triumph one is the same as the elan?
they look the same........but half the price......

thanks

:D fred :D

just seen this from india....says will fit spitfire AND elan?
12.jpg and
14.jpg
14.jpg (2.44 KiB) Viewed 617 times

Re: speedo angle drive

PostPosted: Mon May 16, 2016 2:27 pm
by bill308
I looked into this a few years ago and found the drive used on the Elan had a unique part number, not the same as used on any other application. I suspect the difference may be the drive ratio. I believe the cosmetics are the same as some other applications.

Bill

Re: speedo angle drive

PostPosted: Mon May 16, 2016 2:51 pm
by Elanconvert
hi bill
yes..looked at this in brian buckland's book.......apparently they are colour coded depending on the final drive ratio....
blue.....3.9:1
green..3.77:1
black..3.55:1

but will they fit [with adapter]?

:D fred :D

Re: speedo angle drive

PostPosted: Mon May 16, 2016 4:14 pm
by Craven
Hi,
If I recall, the thread on the female nut part is different!
Ron.

Re: speedo angle drive

PostPosted: Mon May 16, 2016 4:33 pm
by bill308
Hi Fred.

I believe you are confusing the tach drive gear inside the gear box with the angle drive outside the gear box in you last post. The tach drive gears inside the gearbox are indeed color coded and have a different number of teeth to compensate for the different final drive ratios.

The angle drive is a separate item and it too has a gear ratio associated with it as also changes the drive angle 90 degrees. I believe this drive ratio is different for different applications.

I just found a note I made in my S1, S2, and Coupe Master Parts List. The angle drive for the Elan was a Smiths BG2402/03, which is also used by a Morgan 4/4 series III. The angle drive is common to all Elans.

Bill

Re: speedo angle drive

PostPosted: Mon May 16, 2016 5:24 pm
by Elanconvert
hi bill
just re-read buckland's bible and you are correct...sorry...my mistake......
does that mean that all angle drives are all similarly geared then [presumably 1:1]?

ron.......are you speaking from experience? that would mean the adapter wouldn't fit?

:D fred :D

Re: speedo angle drive

PostPosted: Mon May 16, 2016 7:30 pm
by Craven
Hi Fred.
Yes, I have come across several variations of these drives, both in the thread size and in the ratio of the gearing. I have in the past and I think you may have the same idea, machine up a suitable adaptor to use a different drive. If you have the capability it?s perfectly feasible, but I seem to remember it involved because of the large size of the tread, a lathe with a screw cutting feature. Fairly sure the Lotus drive ratio is 1:1.
Ron.

Re: speedo angle drive

PostPosted: Tue May 17, 2016 7:58 am
by Elanconvert
ron..... great minds, etc... :lol:

while digging around, I came across this;

nkc43.jpg and


looks like it has a finer thread to fit the angle drive supplied by rimmer bros.....

:D fred :D

Re: speedo angle drive

PostPosted: Tue May 17, 2016 8:13 am
by elansprint
We have stopped using the rimmer ones they fail very quickly there is a guy who sells on ebay it is from USA (british sports cars I think) put in the lotus part no we have found these to be far superior
Ian