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#1 |
Registered User
Join Date: Oct 2003
Location: Cumming, Ga
Posts: 234
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How to read timing?
My engine says to set it at 2 degrees tdc. Should the line be to the right of the zero or to the left of the zero?
Any benefits to going to a different degree setting? Its a 307 with stock cam and 76 vette heads with a peformer edlebrock intake and 4bbl carb and the pertronix ignition. Glenn
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Glenn Cumming, Ga (68 C/10 Fleetside LWB 307 (64 C/10 Fleetside Shorty Custom 350, with 73 donor parts aplenty) (2001 Porsche Boxster S - 168 MPH of fun) (2005 Chevy Avalanche Z71 1500) |
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#2 |
Formerly yellow72custom
Join Date: May 2001
Location: Austin, TX
Posts: 7,531
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2* would be the first tick left of 0 on the timing tab. It should say BTDC (advanced) and ATDC (retarted) on the timing tab. Each tick on the tab is two degrees.
If you have electronic igniton instead of the points, it will proably tolerate quite a bit more. I know a 350 with electronic ingition likes 10-12 BTDC, i would set yours at 12 and go pull a few hills lisetning to spark knock....if it pings back it off 2 degrees at a time until it stops. Good luck!
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'72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg |
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#3 |
Registered User
Join Date: Oct 2003
Location: Cumming, Ga
Posts: 234
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So this means the timing mark should be at the 5th or 6th mark to the left of 0 on the tab to start with....correct????
Glenn
__________________
Glenn Cumming, Ga (68 C/10 Fleetside LWB 307 (64 C/10 Fleetside Shorty Custom 350, with 73 donor parts aplenty) (2001 Porsche Boxster S - 168 MPH of fun) (2005 Chevy Avalanche Z71 1500) |
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#4 |
Formerly yellow72custom
Join Date: May 2001
Location: Austin, TX
Posts: 7,531
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Yes, i have experience with 350's and HEI ignitons and that is what they seem to like. However you have a 307, but i wouldn't imagine it to be too much different.
I would try it there and see how it runs. If it is sluggish or pings, back it off accordingly until it runs good. Good luck! ![]()
__________________
'72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg |
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#5 |
Registered User
Join Date: Oct 2003
Location: Cumming, Ga
Posts: 234
|
I finally got it in my head what advanced meant and boy does it run a whole lot better when the timing is set right! Seems she now likes to spin the tires....anyway to fix that problem????
:p
__________________
Glenn Cumming, Ga (68 C/10 Fleetside LWB 307 (64 C/10 Fleetside Shorty Custom 350, with 73 donor parts aplenty) (2001 Porsche Boxster S - 168 MPH of fun) (2005 Chevy Avalanche Z71 1500) |
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