Lotus Elan

40953 distributor springs, which way round?

PostPost by: terryp » Sun May 25, 2014 11:12 am

Hello
Having bought all the bits I started to fit today. Unfortunately the springs on my 41225 are identical ie not 1small & 1big so I don't know which way round to put the 40953 springs? My gut feeling is that it doesn't matter, as basically the larger spring is longer so comes on after the initial take up on the small spring?
See pictures:-
image.jpg and
Bits for 40953 - springs and advance cam 12degrees

image.jpg and
41225 showing springs and 10 degree advance....not as MW data?

image.jpg and
Blocked!!!


So with the 12 degree cam it should give me 24 + static so approx 34 total. The funny thing is that the one in the car is a 10 and according to Miles Wilkins should have been a 7??

So which way round do the springs go?
Thanks
Terry
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PostPost by: billwill » Sun May 25, 2014 7:48 pm

Read this tuning guide, it should contain your answers.

www.vitessesteve.co.uk/PDF/lucastuning.pdf
Bill Williams

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PostPost by: types26/36 » Sun May 25, 2014 7:55 pm

springs
Attachments
springs.JPG and
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PostPost by: terryp » Sun May 25, 2014 8:41 pm

Thanks Brian & Bill ....perfect!

Next weekend I'll have the car running as UK spec!

Terry
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PostPost by: terryp » Mon May 26, 2014 6:23 pm

Brian
I suppose you haven't got a picture of the weights underneath?
I've just checked and the weights in my 12 degree donor are different to my 41225 weights. They are more like the shape of yours? I built everything up and wasn't getting any advance which I think is due to the weights limiting the advance.
Thanks
Terry
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PostPost by: types26/36 » Mon May 26, 2014 7:00 pm

Any good?
Attachments
1.JPG and
2.JPG and
3.JPG and
4.JPG and
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PostPost by: terryp » Mon May 26, 2014 7:21 pm

Brian
Excellent! I need to put in the weights from my donor 23d they are the same as yours.
The other weights allow hardly any movement?

It's funny as there are loads of posts and loads of info on the net that suggest that the weights from a distributor family are the same. I can categorically state they are not!

Thanks again Brian
Terry
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