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Puny Bird
Join Date: Nov 2002
Location: Port Hope (near Toronto) On, Canada
Posts: 4,566
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Quote:
Originally Posted by earossi
I'm actually going the other way from you! I'm backdating a 993 motor so that I can put in different cams and be able to time them via the old system. I did this for several reasons, not the least of which is that to set up the normal, non-keyed cams on a 993 requires special tools to lock in the cams and TDC on the motor before tightening a bolt that fixes the cam sprocket to the cam. These tools are about $1200. And, I don't like the idea of friction being the only element to lock the cams to the sprocket. So, I am back dating my cams.
Unless there is a particular reason why you want to move to cams without a way to key in the sprockets, I suggest that you consider having the necessary keyways machined into your cams. It is not expensive. And, all of your "old" style cam timing sprockets are then a perfect fit.
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Pretty sure that's what I'm doing as well, just checking on a cutter. 
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'74 Porsche 914, 3.0/6
'72 Porsche 914, 1.7, wife's summer DD
'67 Bug, 2600cc T4,'67 Bus, 2.0 T1
Not putting miles on your car is like not having sex with your girlfriend, so she'll be more desirable to her next boyfriend.
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