idle when hot
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Instructor
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From: Paris
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That's the initial timing at crankshaft. Also the stock distributor produces 30 degrees of advance at 3.8k so that would be 45 degrees with 15 initial. Your distributor stop has to be changed to prevent too much advance.
Dr. Detroit
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From: New Braunfels Texas
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
E-Mail our resident expert tech Lars Grismund for his papers on timing....they are well written and super easy to understand. Once you understand....it all will make sense and should come very easy to you. His E-mail is V8fastcars@msn.com The papers are free.
Jebby
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
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From: New Braunfels Texas
I also don't remember the stock distributor pulling that much as my 427/400 didn't but doesn't really mean anything....
But at any rate....this engine will want a lot of initial timing so the distributor should be recurved to get maximum performance assuming the distributor does in fact pull 30 degrees....
Jebby
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Verdad Gallardo
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This is correct and I meant at the crank....
I also don't remember the stock distributor pulling that much as my 427/400 didn't but doesn't really mean anything....
But at any rate....this engine will want a lot of initial timing so the distributor should be recurved to get maximum performance assuming the distributor does in fact pull 30 degrees....
Jebby
I also don't remember the stock distributor pulling that much as my 427/400 didn't but doesn't really mean anything....
But at any rate....this engine will want a lot of initial timing so the distributor should be recurved to get maximum performance assuming the distributor does in fact pull 30 degrees....
Jebby
Thread Starter
Instructor
Joined: May 2023
Posts: 104
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From: Paris
No...that is an arbitrary initial advance number at the distributor...yours may be a bit different in either direction. But you do not set timing at idle......it needs to be set at or above 3000rpm.....
E-Mail our resident expert tech Lars Grismund for his papers on timing....they are well written and super easy to understand. Once you understand....it all will make sense and should come very easy to you. His E-mail is V8fastcars@msn.com The papers are free.
Jebby
E-Mail our resident expert tech Lars Grismund for his papers on timing....they are well written and super easy to understand. Once you understand....it all will make sense and should come very easy to you. His E-mail is V8fastcars@msn.com The papers are free.
Jebby
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Is my vette stock?? HAHA
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From: Im not allowed to tell you
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the dieseling will go away with the timing advance
Thread Starter
Instructor
Joined: May 2023
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From: Paris
just want to share a last update: seems the advance springs are too smooth. having them blocked plus timing @ 15° (as per your recommandation) ....the engine is running well, idle is stable, no noise under the hood, no more back fire ! great progress.
some fine tuning on the carb and that should be OK.
thank you very much for all your insight !
to be continued.
some fine tuning on the carb and that should be OK.
thank you very much for all your insight !
to be continued.
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
just want to share a last update: seems the advance springs are too smooth. having them blocked plus timing @ 15° (as per your recommandation) ....the engine is running well, idle is stable, no noise under the hood, no more back fire ! great progress.
some fine tuning on the carb and that should be OK.
thank you very much for all your insight !
to be continued.
some fine tuning on the carb and that should be OK.
thank you very much for all your insight !
to be continued.
Jebby