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Author Topic:   Timing light problem
bbchs
Dirt Full Roller

Total posts: 32
posted May 19, 2004 05:52 PM  
I bought a timing light last week from autozone. I was in a bind and needed it fast. Tried timing a friends engine and couldn't make any sense of it. What was happening was that it showed 35 degrees initial and when I revved the engine the timing retarded to 20 degrees. Thats completely backwards. I thought maybe it was the ignition on his car. I just put it on mine and it did the same thing. I know my ignition is fine. Is it possible that the dial that controls the timing in the light could be wired wrong. I figure it must be in the light I going to exchange it as soon as I can.

2nd2none
Dirt Forum Champ
Total posts: 755
posted May 21, 2004 10:21 AM  
are those cars you timed running a MSD box style ignition? If they are you cannot accurately time with an adjustable timing light unless you have the motor reved up past 3000 rpms.

jay116
Dirt Freak

Total posts: 428
posted May 21, 2004 11:15 AM  
I'm running an HEI dist. with a MSD box. I don't use an adjustable timing light. At what rpm do I need to set the timing at?
Thanks

tilley88
Dirt Forum Champ
Total posts: 879
posted May 22, 2004 07:45 AM  
Usually total advance is dialed in at 2500-3000 rpm on a non-locked distributor. If your distributor is locked, you can set it at idle. Most MSD's that I have seen have a curve kit, so ya gotta time 'em in above 2500 rrrrr's. Also, MSD recommends not to use a dial-back timing light on their stuff. Out of curiousity, I tried both a dial-back and fixed timing light on my MSD set-up and got the same result. Go figure......

bbchs
Dirt Full Roller

Total posts: 32
posted May 24, 2004 06:07 PM  
The cars I tried to time were mini- stocks. My friends was a 2.3 ford with regular dist. no vacuum advance. My car is Toyota the same way. I still don't have a clue what is wrong. I checked my car at the track with a buddys light it was perfect.

Go figure

Ego Racing
Dirt Forum Champ
Total posts: 724
posted May 26, 2004 09:44 AM  
At lower rpm'S an MSD has Multiple Sparks this will cause some timing light problems. What kind and how old are the spark plug wires? I have seen this cause a problem when the other plugs fire and induce voltage into the other wires.

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