Welcome to our Site for MG, Triumph and Austin-Healey Car Information.
MG MGA - Cam timing
|I know there are loads of threads about this subject, but I was unable to find anything about how to test the valve timing figures in the manual.|
Are the opening and closing degrees measured at 0.05" lobe lift or
should the lift be measured directly on the end of the valve with normal tappet clearance?
|Crane Cams has an 8-page instruction sheet for the process; See here: http://www.cranecams.com/uploads/instructions/803_.pdf|
|You set #1 inlet to .060 clearance, at least for the standard MGA cam|
|Thanks for your answers.|
It seems that opening and closing degrees on my cam shaft are pretty much the same as in the attaced cam chart which I found on an other board, but peek lifts are a little off: intake maks. lift @ 111 deg. ATDC and exhaust @ 105,5 deg. BTDC.
Does that mean that the cam is retarded app. 3 deg.?
|Face value - Yes|
But it will depend on the shape of the lobe as well
Most cams like to run a few degrees advanced anyway
If it were mine I would move it forward the 3deg and probably 2-3 more while you're at it
After plowing thru tons of threads on different boards,
I have come to the same conclusion so I'm aiming for a
3deg advance and will see how it goes.
Thans for your comments.
This thread was discussed between 30/11/2016 and 06/12/2016
MG MGA index
This thread is from the archives. Join the live MG MGA BBS now