Originally Posted by onehundred80
Because of all the trouble with the first ones, loose rivets and I believe odd sizes and shimming problems. I'll do a search sometime.
I am sure the OEM ones are better made and more consistent. But what do I know, that's just what I remember.
I have never had one in my hand.
The envelope to make a new one is the same as modifying the old one, so no benefit from any additional strength. Depending on how close the grooves are to relief in the bore there should be no problems.
Modifying the OEM seems to be the best option and has the benefit of economy.
the only real trouble with the original c3 pulley was the grooves that were cut into the pulley had sharp edges that ended up cutting the belts. as the pulleys wore in the issue disappeared. this issue was also eliminated by not having the grooves in genii 2 pulleys.
the loose rivets were a problem with both c3 and oem alike. as the pulley engages and disengages the spring steel and the rivets become worn. every single s/c pulley will eventually succumb to this wear. there was a member on here that was repairing his with aircraft grade material but never saw any more after his initial thread.
to never have held one in your hand and say the oem is better is a bold statement. i have both and have held them both in my hand. both are very good quality and serve the same purpose. to machine the oem down is a great way to inc. boost for an inexpensive upgrade. if its done properly.
i think the op did a great job but until it is smaller than the c3 or at least equal it will still be inferior to the c3. just my .02