Thread: I am stumped??

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I'm VERY pleased with you. clap, clap, clap, clap, clap, clap, clap, clap (that's applause). And you should be very pleased with yourself now that you know how to do this. You'll be able to amaze others with your knowledge from now on.

Now, let's carry this one step further to find out how many degrees it was off. Let's assume it's a 6" diameter damper ring. To find the circumference of the damper, we'll multiply 6 times 3.14159 (pi) and get 18.849". Now, if we divide 18.849" by 360 (the number of degrees in a circle), we find that one degree on the damper ring would measure 0.05235". Now, using your estimate of 1 1/2" of slip, we'll divide 1.5 by 0.05235 and find that the damper ring had slipped more than 28 degrees, 28.653295 degrees to be exact.

For the rest of you fellows out there who want to nail down TDC like streeter did and also make a mark where you want to set your advance, here's how. Follow the instructions in this thread like he did and find TDC, then center punch the damper ring and put a spot of white or yellow paint in the dot so your timing light will pick it up easily. Now figure out what 1 degree is on the ring with the math I have outlined above. If you want to set initial at for instance, 12 degrees BTDC, move to the right of your TDC mark and center punch the ring again, using a dot of paint. For instance, using the 6 inch ring example, 12 times 0.05235" would be 0.628", so using your dial caliper, move 0.628" to the right of your TDC mark to center punch the advance point.

I'll do another example with an 8" ring. 8 times 3.14159 is 25.13272". Dividing 25.13272" by 360 equals 0.069813" for each degree. If you wanted to move 12 degrees ahead of TDC for your timing point, you'd multiply 12 times 0.069813" and find that you want to move 0.837756" (rounded off to 0.838") to the right of TDC to make your center punch mark.

Now, the last thing on this subject is that if the damper ring has slipped already, it's probably going to slip some more. The only thing to do is to replace the damper or have your damper rebuilt. These guys will rebuild your damper to bulletproof for about $50 for a small block Chevy damper.....
http://www.damperdoctor.com/