Quick timing mark question
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Senior Member
Joined: Jul 2002
Posts: 567
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From: Naperville, Illinois
Quick timing mark question
Does anyone know how the timing marks go on my car?
86 Trans am 305 TPI
Is the center of the biggest valley 6 degrees TDC and then every point goes by 2? I am a little unclear because mine is rusted and I can't see.
THanks
86 Trans am 305 TPI
Is the center of the biggest valley 6 degrees TDC and then every point goes by 2? I am a little unclear because mine is rusted and I can't see.
THanks
Member
Joined: Aug 2001
Posts: 418
Likes: 0
From: Sidney, B.C., Canada
Car: 88 T/A
Engine: 305
Transmission: 700R4
IIRC, they count by 2, both on peaks and valleys. Clean it up with some steel wool and you'll see the marks. Or if you know the max is 12, you could interpolate and divide it up.
Member
Joined: Aug 2001
Posts: 418
Likes: 0
From: Sidney, B.C., Canada
Car: 88 T/A
Engine: 305
Transmission: 700R4
OK it was bugging me so I just checked mine. The first valley after the biggest one - towards the top - is 6 deg. They are spaced kinda funny, but after 6 deg, they go by 2's
Member
Joined: Oct 2002
Posts: 220
Likes: 0
From: Winnipeg, Manitoba, Canada
Car: 82 T/A
Engine: 350
Transmission: th350 w/ high stall C.
so the biggest one is 0 degrees. and towards the two other notches is advanced so the smaller notch right next to big is 6 degrees and the small one next to it is 8?
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