distributor timing - spark plug position
Melting Slicks
Joined: Apr 2002
Posts: 2,118
Likes: 0
From: St. Charles, MO Route 66 Corvette Club
CM: In reading the words in your posting, you have set the timing to
6 deg AFTER TDC. The mark on the vibration damper should be read above the "0". If you closely examine the indicator on the block (and this is hard to do), you will see the letters stamped BTDC above the zero mark. A timing setting of AFTER TDC will kill the performance.
On the question of what setting is best for your L98 engine, I used to set the timing at 8 deg BTDC and this will give you a little more jump at the start. However, if you ever get a scan tool, you will be able to see that the factory setting is best for your car. The performance parameters of your engine are programmed into the electronic control module and these charts ASSUME a base timing of 6 deg.
You are almost there
6 deg AFTER TDC. The mark on the vibration damper should be read above the "0". If you closely examine the indicator on the block (and this is hard to do), you will see the letters stamped BTDC above the zero mark. A timing setting of AFTER TDC will kill the performance.
On the question of what setting is best for your L98 engine, I used to set the timing at 8 deg BTDC and this will give you a little more jump at the start. However, if you ever get a scan tool, you will be able to see that the factory setting is best for your car. The performance parameters of your engine are programmed into the electronic control module and these charts ASSUME a base timing of 6 deg.
You are almost there
Last edited by Sam Lam; Mar 12, 2007 at 07:08 AM.
Thread Starter
Racer
Joined: Feb 2007
Posts: 439
Likes: 0
From: I am the chick magnet. not the corvette.
well the timing procedure was done at night and i failed to see the befoere and after signs. Any how, did it the correct way today, moving it to the 6 above zero and WOW, what a difference. I have a lot more response on the low end and i'm spinning those tires again. She is running like the monster she was...maybe even better than before. Thanks again to all those who helped. 
As for the intermittent start problem that showed it's face before i messed up the timing, it looks like the ignition module did the trick, though I did clean the wire connections down there as well. Also I did install a new fuel filter in the process, so maybe the old one was clogged up and blocking fuel? Not too sure. Not going to use injector cleaner any more after this though, but thankfully it wasn't the injectors, as those are pretty costly.
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
