mk1-forum.net

Does anyone know the 1300GT cam timings? Was it the same as the 1275GT or Cooper S?

Quick post to get this back to the top - can anyone help NZmember?

I've dug out my ADO16 Haynes manual and the 12G and 12H 9.71 CR engines with double valve springs have the following valve timings.

Inlet valve;
Opens 5 degrees btdc.
Closes 45 degrees bbdc.

Exhaust valve;
Opens 51 degrees bbdc.
Closes 21 degrees atdc.

I am assuming that because the figures quoted are for double valve spring/ed heads that they would apply to the 1300GT and Vanden Plas type of engine.

Unless, of course, someone on here has more info.

Found some more info.

The above quoted figures are the same as Cooper S engines with 0.21 rocker clearance.

The 1300GT cam was the same as std 1300, pre 'A' plus allegro, sprite/midget and early 'S' and more.
This cam is what we termed as the AEG528 even though that number changed to AEG523 we still termed it as a 528.and to make number matters even more confuseing the same cam was first part numbered AEG522 in the 1275 sprite/midget.
This cam number refers to a star drive where as the 'S' was a pin drive which complicates discussions a little more, but that was how we turmed this profile in the 60's when 'we' used it.
Calling this an 'S' cam is true in a sence but I only ever found it in 1071 'S' and it is a 230/252 cam where as most when talking of a standerd spec 'S' cam would invisage the 240/252 duration.
The 528 does responed well with advancement of up to 4 degrease but there after top end disappears.

Thanks for the info.
No point buying then as it is the same as already fitted. Amazed at how difficult it was to find this info.