[darbikrash]

Originally Posted by Colin70TA

I just finished degreeing my OLD faithful cam (which I had to advance 4 degrees to get at a 107.5 ICL). Confirmed top dead with a dial indicator. Went to install the timing cover and balancer and the TDC timing mark on my Pioneer balancer is lining up at 4 degrees before. Does this make sense? Should I just mark the balance to make a new reference to zero?
I am positive I did TDC right, took measurements on 0.200 on either side of TDC and recorded on degree wheel and found top dead that way.

Just did this degreeing in my stroker 400 using an OF 2 cam ground on a 112 LSA. I used a dial indicator as well, and found it about 4 degrees off. I messed with it for hours, and switched to a hard stop on the top of the cylinder bore to set TDC instead of the dial indicator.

Results within 1/2 degree. Put the balancer on and it was also within 1/2 degree.

The hard stop (metal strap across the cylinder bore with a bolt in the center as a stop) method is more accurate than using dial indicator, this is because at or near TDC the crank can rotate a few degrees with the piston not moving much due to dwell.

Try it with a hard stop and see if things change.

[Colin70TA]

Originally Posted by darbikrash

Just did this degreeing in my stroker 400 using an OF 2 cam ground on a 112 LSA. I used a dial indicator as well, and found it about 4 degrees off. I messed with it for hours, and switched to a hard stop on the top of the cylinder bore to set TDC instead of the dial indicator.

Results within 1/2 degree. Put the balancer on and it was also within 1/2 degree.

The hard stop (metal strap across the cylinder bore with a bolt in the center as a stop) method is more accurate than using dial indicator, this is because at or near TDC the crank can rotate a few degrees with the piston not moving much due to dwell.

Try it with a hard stop and see if things change.

Thanks, I was thinking that might be the case too because of dwell, which was why I didn't actually mark my measurements when the piston was 100% up but rather equal amounts on both sides of TDC. This gave me 2 readings on the degree wheel which I used to find true TDC. Now I am wondering if that's the correct way?
If that was correct then I'll just caulk up the balancer to machining or whatever and mark my new TDC on it.

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