340 TIMING

[DUSTERVA]

NEED THE FACTORY TIMING SETTING FOR A 73 340.
QUESTION, CAR HAS A "SMALL"CAM WILL THIS EFFECT TIMING AND IF SO WHICH WAY TO ADJUST, BEFORE OR AFTER?

[SB Racer]

Do you mean ignition timing or cam timing?
Anyway, Mopar cams (Chrysler made) use in
most of the cases 2 degrees advance on the cam. I suppose yours is grounded on 110 c-line and needs to be adjusted to 108.

TeRo http://www.angelfire.com/mo/racevaliant

[shannon]

If your talking about distributer timing, unplug the vaccume advance and idle up the engine to 2500 rpm. Set the timing without the vaccume advance to about 35 degrees before top dead center. With the advance connected it should be about 50 degrees. This should be pretty close. If you want to set the timing at idle, set it from 8 to 12 degrees before top dead center. I think that stock is 5 degrees before TDC. Yes the cam will affect timing.

340 party

[LA360Dart]

The factory timing for ingition is 2 and 1/2 deg BTDC at 850 Rpm off The emissions sticker on my 73 Dart Sport 340 hope this helps ( btw is a california car)

[toolman]

I have always been taught to set it for Total timing and foreget what the Initial timing says, unless you have plans on seeing what the initial is incase you want to change the weights by welding and spring change stuff. Yours is close to stock so I would go with Total timing as shannon said. It should be from 35 to 38 degrees BTDC, but no more and no less in my opinion. I check mine at 2500 to 3000 rpm. You will need somone to work the accelerator for you so you can do this safely. And I would forget what the degrees say with the hose hooked up. Do it with it unhooked. Stock factory timing is always too low so don't worry about their exact number. Doing the above should give you a higher number than theirs on the initial timing (at idle).Don't worry about that. With a small cam you shouldn't need to weld or change springs.

[This message has been edited by toolman (edited June 18, 2000).]