Postby veloduke » Sat Feb 06, 2021 4:31 pm
The engine could well be 76, it's not original. The chassis is MD42142, and was reigistered in Barcelona on 28/3/1977, so I guess could also be a 76 depending on how long it was in the showroom.
I did some rough measuring of the cam timing, and it has longer opening duration than the cam data you gave;
Inlet opens 40 BTDC
Inlet closes 140 ABDC
Exhaust opens 70 BBDC
Exhaust closes 100 ATDC
Having drawn the timing figures on a circle, I can see that my cam is offset to the standard cam, so almost certainly needs correcting - looks like it's about 40 degrees offset.
I'll have to do a calculation to convert that to bevel teeth.
All part of the fun!
Cheers
Max