Quote:
Originally Posted by ertech
So I need the bolt type? For the 930
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You don't have to use the bolt type cams on a 930 or any other 911 motor, just get the 46mm nut and fat wavy washer that goes under it and use those instead of the 19mm bolt and washer that goes under it on the '81 and later cams.
Most 911 shops will have some used 46mm nuts and the wavey washer hanging around.
I've heard 1.7mm for an SC cam timing spec but you can vary that so just call a camgrinder and ask them for recommendations.
Advance the cam timing to lower the powerband and retard the cam timing to raise the powerband. A higher number is advancing the cam timing and a lower number is retarding it.