OK, what the heck am I doing wrong? - Page 2

Alan Roehrich · 11-10-2011, 08:26 PM

Quote:

Originally Posted by eddie c

Art; I thought that I understood this,but now I am confused. You state 10 crank degrees equal 20 cam degrees. Since the cam moves half of the crank,wouldn't 10 crank degrees equal 5 cam degrees? help to explain
this please. ed

You're changing the relationship between the camshaft and the crankshaft.

You don't really measure "cam degrees". Everything in an engine measures in "crank degrees".

The cam moves slower than the crank, so, if you retard the cam 10 degrees by moving the cam gear a tooth, the cam falls behind by 20 degrees, since it moves at 1/2 speed.

R. Thorne · 11-10-2011, 08:28 PM

I have seen timing gear sets vary as much as 8 degrees. I would try another brand of timing gears. Ron.

art leong · 11-10-2011, 10:43 PM

Quote:

Originally Posted by eddie c

Art; I thought that I understood this,but now I am confused. You state 10 crank degrees equal 20 cam degrees. Since the cam moves half of the crank,wouldn't 10 crank degrees equal 5 cam degrees? help to explain
this please. ed

I had brain fade I was backwards Thinking right but typing (explaining)wrong.
Crank moves 720 (2 turns) degrees. The cam goes 360 degrees (one turn)

My motor is weird but not that weird. LOL

older racer · 11-11-2011, 01:23 AM

hi, just asking, did you have both marks at 12 oclock when degreeing cam? with marks at 12 and 6 oclock which is lined up for install , motor is on # 6 TDC. just thinking outloud.

Bobby Zlatkin · 11-11-2011, 11:25 AM

OK, thanks to you guys, I finally get it.

I did move the cam 10 degs. but the degree wheel is attached to the crank, not the cam, and that's where I was reading 20 degs.

It finally hit me this morning when I was on my lawn tractor mulching leaves. Can't believe I didn't/couldn't see it sooner. The cam will come out and go back to the manufacturer who is anxious to make the correction and send it back.

Thanks again.

I'm not really stupid, just dumb.

11-10-2011, 08:28 PM	#12
R. Thorne Member Join Date: May 2009 Posts: 183 Likes: 66 Liked 101 Times in 34 Posts	Re: OK, what the heck am I doing wrong? I have seen timing gear sets vary as much as 8 degrees. I would try another brand of timing gears. Ron.

11-11-2011, 01:23 AM	#14
older racer Member Join Date: Aug 2010 Posts: 212 Likes: 13 Liked 68 Times in 26 Posts	Re: OK, what the heck am I doing wrong? hi, just asking, did you have both marks at 12 oclock when degreeing cam? with marks at 12 and 6 oclock which is lined up for install , motor is on # 6 TDC. just thinking outloud.

11-11-2011, 11:25 AM	#15
Bobby Zlatkin Member Join Date: Mar 2003 Location: Mills River, NC Posts: 417 Likes: 0 Liked 0 Times in 0 Posts	Re: OK, what the heck am I doing wrong? OK, thanks to you guys, I finally get it. I did move the cam 10 degs. but the degree wheel is attached to the crank, not the cam, and that's where I was reading 20 degs. It finally hit me this morning when I was on my lawn tractor mulching leaves. Can't believe I didn't/couldn't see it sooner. The cam will come out and go back to the manufacturer who is anxious to make the correction and send it back. Thanks again. I'm not really stupid, just dumb. __________________ Bobby & Norene Zlatkin L/SA