Well, got the BIG wheel on my motor and checked the timing from when it was setup several years ago. Looks like cam timing was retarted about 3 degrees. By putting timing where it belongs, anyone know about how much torque curve will be shifted to lower rpm? 993 rsr cams.
This big wheel is amazing the resolution. Can easily get to 1/2 degree not too much additional to get to 1/4 degree.
Set TDC using dial indicator directly over top of piston before installing heads, and then with piston stop with heads installed... basically got same number within about 0.12 degrees. Though I did determine length of piston stop so it would be on flat part of piston (3.8 rsr) with an empty head on a cylinder & piston.
btw, is angle of valve on 993 different than 964? I have 964 heads on my motor with 993 cam towers. Noticed intake valve on 964 head is at 30 degrees from vertical and 993 cam tower valve cover surface is at 25 degrees. ...exh valve matches at 25 degrees.
