The Ford Barn

russcc · 06-16-2021, 06:59 PM

When I built the 59L engine I drilled a hole in the timing cover and mounted a pointer close to the crankshaft puiler, turned the engine over with the dial indicator on #1 piston to get TDC and marked it on the crankshaft pulley.
The 59L has a 1007B cam, so I wanted to check the timing and it seems like it was firing quite a bit before TDC.
With a regular distributor you disconnect manifold vacuum first. How do you that with the 21A, and if it is needed. The vacuum brake or vacuum line from the manifold to the timing cover ? I have an older timing light, not a newer dial back type. Thank you.

flatjack9 · 06-16-2021, 07:51 PM

The vacuum brake should not effect timing at idle.

russcc · 06-17-2021, 12:16 PM

Thank you for that info. How about the vacuum line from the manifold below the carb. to the timing cover. Disconnect or not ?

Ken/Alabama · 06-17-2021, 02:32 PM

What Jack said . Do not disconnect, vacuum brake shouldn’t make a difference at idle.

russcc · 06-17-2021, 06:49 PM

Sponsored Links (Register now to hide all advertisements)

Thank you.

06-16-2021, 07:51 PM	#2
flatjack9 Senior Member Join Date: May 2010 Location: Oshkosh, Wi Posts: 4,526	Re: Timing a 21A distributor in 59L The vacuum brake should not effect timing at idle.

06-17-2021, 12:16 PM	#3
russcc Senior Member Join Date: May 2010 Posts: 2,871	Re: Timing a 21A distributor in 59L Thank you for that info. How about the vacuum line from the manifold below the carb. to the timing cover. Disconnect or not ?

06-17-2021, 02:32 PM	#4
Ken/Alabama Senior Member Join Date: May 2010 Location: Alabama Posts: 3,260	Re: Timing a 21A distributor in 59L What Jack said . Do not disconnect, vacuum brake shouldn’t make a difference at idle.

06-17-2021, 06:49 PM	#5
russcc Senior Member Join Date: May 2010 Posts: 2,871	Re: Timing a 21A distributor in 59L Sponsored Links (Register now to hide all advertisements) Thank you.

06-16-2021, 06:59 PM	#1
russcc Senior Member Join Date: May 2010 Posts: 2,871	Timing a 21A distributor in 59L When I built the 59L engine I drilled a hole in the timing cover and mounted a pointer close to the crankshaft puiler, turned the engine over with the dial indicator on #1 piston to get TDC and marked it on the crankshaft pulley. The 59L has a 1007B cam, so I wanted to check the timing and it seems like it was firing quite a bit before TDC. With a regular distributor you disconnect manifold vacuum first. How do you that with the 21A, and if it is needed. The vacuum brake or vacuum line from the manifold to the timing cover ? I have an older timing light, not a newer dial back type. Thank you.