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Reed
Supercharged
Joined: 03 Nov 2002
Posts: 8596
Location: Fircrest, WA
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Post subject:
(Tue Mar 13, 2012 11:39 am)
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| Valleyant wrote: | | Timing is set at 5degrees ATDC...No ping/detonation with 91 octane fuel...Trial and error on the base timing. Whatever the actual value is, I have found what this combo of parts likes. |
I think you have a slipping timing mark on the vibration dampener. Get a piston stop tool and find out exactly where TDC currently is in relation to your timing mark. |
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Doc
Guru
Joined: 14 Oct 2002
Posts: 5004
Location: Working in Silicon Valley, USA
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Post subject:
(Tue Mar 13, 2012 11:43 am)
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Read-up on distributor recurving... because...
More over-all performance is in there, waiting to be "unleashed" with some carefull distributor work.
Basically, if you decrease the amount of total mechanical advance by 10 degrees, you can re-adjust the initial timing to 5 degrees BTDC (+ 10 degrees) to get a little better off-idle and low rpm performance... with-out higher RPM pinging.
And yes... confirm that the timing mark is correct, before starting any distributor recurving work.
DD
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Valleyant
EFI Slant 6
Joined: 13 Jul 2007
Posts: 441
Location: Cincinnati
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Post subject:
(Sun Mar 18, 2012 7:37 pm)
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| Thanks guys. A distributor recurve is in the plans. I am going to get a piston stop tool and find TDC first and proceed from there!
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