My timing was wrong!
Thread Starter
Le Mans Master
Joined: May 1999
Posts: 6,692
Likes: 29
From: Texas
My timing was wrong!
Found out it was at 15 degrees BTDC, not the specified 6 degrees. No wonder it liked premium gas! Moved it back to 8 degrees. So, what does having too much advance do?
[Modified by Larry82, 7:07 PM 5/3/2002]
[Modified by Larry82, 7:07 PM 5/3/2002]
Safety Car
Joined: Feb 1999
Posts: 3,631
Likes: 14
From: Fountain Hills AZ
Re: My timing was wrong! (Larry82)
Larry, too much advance kills power in two ways. By causing the fuel mixture to ignite too soon, it doesn't burn as efficiently. The other way is that it is creating a downward force on the piston while it is trying to go up. Besides using up the energy that would otherwise have been available for pushing the piston down on the power stroke, more of the power that is being developed in the opposing cylinders is being consumed to overcome the extra resistance of the firing cylinder.
Some basic things to consider are that "more isn't always better" and that anything that is added to inititial is added to total. An engine may feel stronger with more initial but if it results in too much total, you'll wind up actually losing power. The best way is to set timing at total and then, if necessary, adjust the curve so that initial is compatible.
Some basic things to consider are that "more isn't always better" and that anything that is added to inititial is added to total. An engine may feel stronger with more initial but if it results in too much total, you'll wind up actually losing power. The best way is to set timing at total and then, if necessary, adjust the curve so that initial is compatible.
Thread Starter
Le Mans Master
Joined: May 1999
Posts: 6,692
Likes: 29
From: Texas
Re: My timing was wrong! (Twinnie)
No, did disconnect it. Been down that route before. I don't think it was ever really checked properly since someone and I changed out my intake manifold. Bought a dial-back timing light and found out I was off that much. Car starts and runs differently. Have not had a chance to take it over 35 mph or so yet.
