How many degrees of BTDC do you need for static timing?
The static timing using this method is commonly between about 5 and 10 degrees BTDC, but I have seen reports of up to 16 degrees BTDC, since these distributors DO vary in the total advance they can make. Run the vehicle, and try some high speed and lower speed high acceleration runs. If it runs fine, you’ve got it right.
When do we advance ignition timing to 16 degrees BTDC?
B. 16 degrees BTDC Ignition Timing When we advance the timing to 16 degrees BTDC (-16 on the X-axis), we move the peak cylinder pressure location earlier (i.e. the finish of the combustion event). The start of the combustion event or expanding force is earlier.
What’s the correct idle timing for the 009 distributor?
Usually the idle timing (with the maximum advance correctly set) will be anywhere from about 5 to 10 degrees BTDC, but I have seen them up to 16 degrees BTDC to get the correct maximum advance – so you can see how important the maximum advance is.
Why do I need to change the distributor timing?
It’s important that the engine be idling at its warm-idle rpm. It’s likely that our static ignition timing at the crankshaft at idle may not be the desired 10 degrees BTDC. If it must be changed, merely loosen the hold-down nut and adjust the distributor until the initial timing on the crankshaft is at the desired timing figure.
B. 16 degrees BTDC Ignition Timing When we advance the timing to 16 degrees BTDC (-16 on the X-axis), we move the peak cylinder pressure location earlier (i.e. the finish of the combustion event). The start of the combustion event or expanding force is earlier.
The static timing using this method is commonly between about 5 and 10 degrees BTDC, but I have seen reports of up to 16 degrees BTDC, since these distributors DO vary in the total advance they can make. Run the vehicle, and try some high speed and lower speed high acceleration runs. If it runs fine, you’ve got it right.
What’s the best advance timing for a 009 distributor?
Try 30 degrees at 3000 rpm first, and let the idle timing fall where it may. If the maximum advance timing is set at less than 28 degrees, it will be under-advanced at high rpm and result in overheating.
It’s important that the engine be idling at its warm-idle rpm. It’s likely that our static ignition timing at the crankshaft at idle may not be the desired 10 degrees BTDC. If it must be changed, merely loosen the hold-down nut and adjust the distributor until the initial timing on the crankshaft is at the desired timing figure.