ET: Engine (Twin) Limiting the ATD rotation

eharris

Well Known and Active Forum User
VOC Member
Following the article in MPH the other month, I checked me ATD and see it has a full 18deg movement. The article suggests limiting this to 15deg, but I don't have the skill/tools to take it apart and weld bits on to the lugs, so wondered is I could make a sleeve that fits over the lugs of the right thickness, from some steel shim or similar.

Form an orderly queue to tell me why this is a foolish idea...
 

bmetcalf

Well Known and Active Forum User
VOC Member
I would want a very reliable method of attaching the sleeve, so that it doesn't come off and get friendly with the gear mesh.
 

Marcus Bowden

VOC Hon. Overseas Representative
VOC Member
It doesn't need to be stripped to add a little weld in two spots on the lugs using stick, tig or mig but gas flame gets every where you don't want it. Using a pertractor of sorts twist it full rang then back off to 15 degrees eyeball the distance at the lugs measuring if you can and get the weld on a bit thicker and file to suit.
bananaman
 

greg brillus

Well Known and Active Forum User
VOC Member
Forget the welding...........Just bend all four stops inward about a 1/16th of an inch each using small spanners of a size about 9 mm or 3/8. This does not over stress the lugs as it would if you only bent say the full advance stops only. You want the engine to have 4 to 5 degrees of initial advance and 34/35 full advance, so the ATD needs 15 degrees of travel not 17 or 18 as per original, this on singles and twins. Cheers.
 

vibrac

Well Known and Active Forum User
VOC Member
Check the rotation towards the end of production Roy Price was reducing the rotation anyway
 
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