George, You can use vacuum to set a your idle mixture and your timing. Concerning your idle mixture: You adjust your idle mixture down until your vacuum just starts to drop off them you adjust it up until your vacuum just starts to drop off. The correct setting is in the middle of the two. Concerning your timing: You loosen the distributor and move it back & forth until the maximum vacuum is reached. Then you lock down the distributor & go for a short test drive while listening for detonation. Adjust the timing back & test drive until you hear no detonation, then set your timing back another 2 degrees. This may take several test drives. Set your idle speed to where it belongs. Notes: You need to reset your idle mixture after setting your timing. This procedure assumes you are running the correct octane gas for the car & its not a fix for running lower grade gas then the engine was designed for.
Thanks, Tom Hargrave 256-656-1924 www.kegkits.com _____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Tuesday, August 23, 2005 1:42 PM To: benz Subject: [MBZ] Using vacuum to set timing Hi all, I have heard of a way to set the timing without a vacuum light. Supposedly it works great for older beasts that the timing marks don't always align. My understanding is, hook up a vacuum gauge and turn distributor until you find the most vacuum then retard it be 2" of vacuum. Anybody try this? I have a simple question. Do you adjust the idle as you move the distributor? or once you have found the most vacuum -2 then set the idle speed? Thanks George
