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74 GTV 76 Alfetta GT
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Discussion Starter · #1 ·
Pulled these out of a 83 spider parts car that was advertised as having "11 mm cams"
Any idea what they are? Might be stock for all I know.

Pipe
Pipe Wire Metal Steel
 

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Richard Jemison
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8,313 Posts
From the look of the lobe and the much larger BC on the intake cam they well be stock Motronic cams. Head may be Motronic as the Intake wont fit in earlier heads.
 

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74 GTV 76 Alfetta GT
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115 Posts
Discussion Starter · #3 ·
Thanks Richard
I'm thinking about using this exhaust cam in my 74 Spica GTV as an improvement over stock and a "euro cam" for the intake side.
Car will also have motronic pistons/liners.
Anyway to verify this is a motronic exhaust cam?
There are no markings except noted in the pic.
 

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74 GTV 76 Alfetta GT
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115 Posts
Discussion Starter · #5 ·
Thanks for that.
I measured the lift and looks like a 10.5 mm lift cam.
 

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74 GTV 76 Alfetta GT
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115 Posts
Discussion Starter · #7 · (Edited)
I measured these cams hoping that would help in identifying them.

The exhaust cam has a base circle of 26.543 mm and lobe of 37.084 mm
giving a lift of 10.541 mm.

Intake cam base circle of 26.645 mm and lobe 37.211 mm giving a lift lift of 10.56 mm

So looks like 10.5 mm lift cams?

I'm guessing these are Centerline 10.5+ cams??

exhaust cam marking:

Paper Metal Toilet paper
 

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74 GTV 76 Alfetta GT
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115 Posts
Discussion Starter · #9 ·
Good idea!
I did and was notified they might be 11mm L-jetronic cams which makes sense since they came out of an 83 Spider.
Is duration known for these?
The vendor could only tell me they were 11mm lift.
 
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