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| How far to advance timing? https://www.slantsix.org/forum/viewtopic.php?t=4097 |
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| Author: | Julie Roth [ Thu Aug 29, 2002 4:01 pm ] |
| Post subject: | How far to advance timing? |
Just put a 2bbl Holley 2280 conversion on my 74 Duster 225 slant 6 with MSD ignition. Also put on Dutra Dual exhaust manifolds. How far should I advance the timing? I have heard everything from 4-6-8 to 12 degrees? What is it ? julie-roth@woz.org |
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| Author: | Dart270 [ Fri Aug 30, 2002 6:31 am ] |
| Post subject: | Re: How far to advance timing? |
Quote:
: Just put a 2bbl Holley 2280 conversion on my 74 : Duster 225 slant 6 with MSD ignition. Also : put on Dutra Dual exhaust manifolds. : : How far should I advance the timing? I have : heard everything from 4-6-8 to 12 degrees? : : What is it ? Due to manufacturing differences (both planned and unplanned, like misset cam centerline or worn timing chain), your best timing setting will depend on your specific car. I would take the factory spec, advance the timing 5 deg and drive it for a while. Listen for pinging on uphills or when hot and under medium-hard acceleration. If there is no pinging, then advance another 2-3 degrees and listen again. Repeat until you hear pinging, then back it off 2 deg. Happy tuning, Lou |
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| Author: | Doctor Dodge (Doug Dutra) [ Fri Aug 30, 2002 7:51 pm ] |
| Post subject: | Re: How far to advance timing? |
Quote:
: Just put a 2bbl Holley 2280 conversion on my 74 : Duster 225 slant 6 with MSD ignition. Also : put on Dutra Dual exhaust manifolds. : : How far should I advance the timing? I have : heard everything from 4-6-8 to 12 degrees? : What is it ? As Lou pointed-out, every engine is different so the answer is "advance it untill it pings, then back-offsome". As reference, the initial timing on most stock SL6 can be in the 6 to 8º without pings, some take even more. You will find that it runs better as you advance it but don't let it ping & knock, that breaks pistons & rings. DD |
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| Author: | DusterIdiot [ Fri Aug 30, 2002 9:57 pm ] |
| Post subject: | Re: How far to advance timing? |
Quote:
: Just put a 2bbl Holley 2280 conversion on my 74 : Duster 225 slant 6 with MSD ignition. Are you the PhD that wrote that great article on the MSD upgrade for the old "Tailfins" site? -D.Idiot |
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| Author: | Julie Roth [ Sat Aug 31, 2002 8:14 am ] |
| Post subject: | Re: How far to advance timing? |
Quote:
: Are you the PhD that wrote that great article : on the MSD upgrade for the old : "Tailfins" site? : : -D.Idiot Yes... that's me. The MSD was the best addition I ever did for my slant six. My friend is now trying to get me interested in converting it to EFI. Will it never end ? .. ( just kidding.. its fun and I am always learning something new, especially from this great web site ) julie-roth@woz.org |
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| Author: | DusterIdiot [ Sat Aug 31, 2002 7:56 pm ] |
| Post subject: | Re: How far to advance timing? |
Quote:
: Yes... that's me. The MSD was the best addition : I ever did for my slant six. My friend is : now trying to get me interested in : converting it to EFI. : : Will it never end ? .. ( just kidding.. its fun : and I am always learning something new, : especially from this great web site ) No, it never "ends"...but it always makes things much more fun later Honest! Good to see some of the tailfins people on this site...I still have a hard copy archive of the articles from that site for reference for my own Duster build-up... -D.Idiot |
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