Lotus Elan

speedo angle drive

PostPost by: Elanconvert » Mon May 16, 2016 12:23 pm

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 632 times
'Never give up!....unless it's hopeless.....'

1970 S4 dhc big valve
1973 Ginetta G15
1967 Ginetta G4 [sadly now sold]
1959 lotus elite type 14
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PostPost by: bill308 » Mon May 16, 2016 2:27 pm

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
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PostPost by: Elanconvert » Mon May 16, 2016 2:51 pm

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
'Never give up!....unless it's hopeless.....'

1970 S4 dhc big valve
1973 Ginetta G15
1967 Ginetta G4 [sadly now sold]
1959 lotus elite type 14
Elanconvert
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Posts: 429
Joined: 26 Jul 2013
Location: Sunny Devon, United Kingdom

PostPost by: Craven » Mon May 16, 2016 4:14 pm

Hi,
If I recall, the thread on the female nut part is different!
Ron.
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PostPost by: bill308 » Mon May 16, 2016 4:33 pm

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
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PostPost by: Elanconvert » Mon May 16, 2016 5:24 pm

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
'Never give up!....unless it's hopeless.....'

1970 S4 dhc big valve
1973 Ginetta G15
1967 Ginetta G4 [sadly now sold]
1959 lotus elite type 14
Elanconvert
Third Gear
Third Gear
 
Posts: 429
Joined: 26 Jul 2013
Location: Sunny Devon, United Kingdom

PostPost by: Craven » Mon May 16, 2016 7:30 pm

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.
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PostPost by: Elanconvert » Tue May 17, 2016 7:58 am

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
'Never give up!....unless it's hopeless.....'

1970 S4 dhc big valve
1973 Ginetta G15
1967 Ginetta G4 [sadly now sold]
1959 lotus elite type 14
Elanconvert
Third Gear
Third Gear
 
Posts: 429
Joined: 26 Jul 2013
Location: Sunny Devon, United Kingdom

PostPost by: elansprint » Tue May 17, 2016 8:13 am

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
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