jackshaft identification

PostPost by: alan » Tue Mar 25, 2014 7:09 am

I had a flash of memory from the past :mrgreen:
I seem to remember that the Jackshaft used in the block to drive Dizzy,Fuelpump, Oilpump was a GT Cortina Camshaft :shock: Can some confirm this :P
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PostPost by: rgh0 » Tue Mar 25, 2014 7:28 am

It was a standard ford camshaft for the 1500 block engines. I suspect Lotus and Ford did not worry which one they used. When Ford moved to only using 1600 block engines and Lotus was the last of the 1500 block users then I suspect Ford put a standard 1600 block cam in as the jackshaft

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PostPost by: promotor » Tue Mar 25, 2014 9:19 am

I've seen jackshafts with both 116e (Cortina GT) or 109e (which were fitted to "normal" engines from Anglias with pre crossflow engines up to 1600 xflow found in mk2 cortinas and early mk1 escorts) on them so as Rohan says they didn't seem to be bothered which ones they used - I suppose they used whatever was available!
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PostPost by: alan » Tue Mar 25, 2014 10:56 am

imho i think if someone is rebuilding an engine and intends to fit a special short jack shaft it's a good idea to check identification. If it's a GT Cortina camshaft it would be a nice bonus to sell to help to pay for the rebuild.
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PostPost by: promotor » Tue Mar 25, 2014 6:32 pm

Selling a jackshaft to be used as a camshaft isn't really going to work - a jackshaft has four oil pumping grooves in the front bearing, whereas a proper camshaft only has the one.

I doubt you will ever get anyone who wants a GT camshaft to fit one with the four grooves to a pre xflow engine.
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