Yes, the tab looks like an aftermarket tab since it's chrome. I didn't install it, I'm just trying to figure out what's on the car when I bought it. It could be for an 8" damper; which would put the tab about .75 inches from the balancer. Still pretty far away.
However, Brad sums up my basic question. Does the timing tab show degrees of crank rotation, or degrees of distributor rotation? I always thought the timing specs were degrees of crank rotation. I'm reading articles on how to mark degrees on your balancer so you can check total timing advance, and these degrees are crank rotation. It seems like the degrees you mark on the balancer should be the same as the timing mark. Mine would be off by a factor of two. Tom -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Colt Seavers Sent: Saturday, June 14, 2003 10:48 AM To: [EMAIL PROTECTED] Subject: RE: [Chevelle-List] Timing tab question >From: "Tom Tomlinson" <[EMAIL PROTECTED]> >Subject: [Chevelle-List] Timing tab question >Date: Sat, 14 Jun 2003 00:32:12 -0400 > >I'm going through the timing on my '71 350 Malibu and have a question >on the timing tab. Is it an aftermarket bolt-on tab or is it welded to the front cover? >First, my timing tab is located 1.25" from the balancer, which introduces >a lot of parallax when you try to adjust the timing. As André suggested, perhaps the tab's for an 8" damper. >Shouldn't the degrees on the timing tab measure the degrees around the >balancer? Is my tab off by a factor of two, or are my calculations off? Remember that you're timing the ignition and that the distributor turns half as fast as the crankshaft. Could this explain the doubling/halving you're seeing? One of the easier but often overlooked tasks is the verification of TDC. Either buy or make a piston stop and verify that the timing mark on the damper is at the 0 mark on the tab when the piston's at TDC. This is a good idea especially when an aftermarket damper and/or timing tab has been installed. Brad ----------------------------------------------------- To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED] ----------------------------------------------------- To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
