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#1 |
Active Member
![]() Join Date: Nov 2005
Location: Austin
Posts: 217
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should timing be set "by the book", or tweaked?
My Haynes manual indicates my idle advance should be 4 degrees BTDC. Is that it? End of story? Or is this something which should be fine tuned?
I have heard horror stories of people shortening the life of their motors by "tweaking" their timing, and my 292 doesn't have any provision for knock sensing, so I don't see how I would even know if I had pushed things too far until my pistons start grenading... |
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#2 |
Registered User
Join Date: Jan 2006
Location: sidney , illinois
Posts: 312
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Re: should timing be set "by the book", or tweaked?
"seat of the pants " has always been good to me. what seemed to work best for me was advance the timing till it just starts to ping , then back it off a degree or 2 . hope it works for you
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hey.....smell my finger 64 nova wagon , 63 nova convertible |
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#3 |
I survived Dead Man's Curve.
Join Date: Apr 2006
Location: The Nine-Five-687
Posts: 389
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Re: should timing be set "by the book", or tweaked?
I keep mine at 4 deg. BTDC. Since tuning it to that (as apparently I was driving it with the wrong ignition timing for a short time) the motor stopped running so hot and held idle a LOT better. They're not performance or anything, you just gotta eye it at 4 deg BTDC.
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"The people should not be afraid of their government. The government should be afraid of it's people." "The Hurricane" 1967 Chevrolet C10 350 Eight Cylinder, 700R4 BowtieOverdrive Cherry Bomb... Disturbing the Peace Since 1968. ![]() |
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#4 |
Active Member
![]() Join Date: Nov 2005
Location: Austin
Posts: 217
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Re: should timing be set "by the book", or tweaked?
agreed ThatOneBlue67. I just set to 4 degrees advanced (as per recommendation in the Haynes manual), and it runs like a champ. engine warms up and then holds steady at the same temp.
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#5 |
Senior Member
Join Date: Mar 2003
Location: St robert Mo
Posts: 2,001
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Re: should timing be set "by the book", or tweaked?
Just depends on the motor but I always am of the rule the most intial advance it can take with out pinging will net the most power. I have Never had any heat issues or idle problems. Mine is a little more than stock maybe 330HP and it is set at 13 deg with nor problems.
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1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO Last edited by 76bonanza; 08-22-2006 at 07:18 PM. |
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#6 | |
Registered User
Join Date: Dec 1999
Location: Old Mission, MI, USA
Posts: 2,510
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Re: should timing be set "by the book", or tweaked?
Quote:
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Tim Last edited by Blazer1970; 08-22-2006 at 07:30 PM. |
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#7 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: should timing be set "by the book", or tweaked?
I use the up to ping/then back a bit method for great results.If you don`t hear a ping,it ai`nt pingin`.
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#8 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: should timing be set "by the book", or tweaked?
if you haven't degreed your cam so that you know exactly where the timing marker is in relation to TDC then it's just guesswork anyway is it not??
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#9 |
Registered User
Join Date: Sep 2005
Location: Villa Rica Ga
Posts: 889
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Re: should timing be set "by the book", or tweaked?
i had to play with mine a bit after intsalling the cam, was to advanced and i broke 2 starters before i figured it out. but you sound like your on the rite track .
Last edited by Premium72; 08-23-2006 at 09:35 AM. |
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#10 |
Registered User
Join Date: Sep 2005
Location: 9000' Mountain Man
Posts: 326
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Re: should timing be set "by the book", or tweaked?
It depends on how the enging is built, fuel used, AND altitude. Where I live at 9,000 ft, with a factory engine, I must run 4 to 6 degrees aditional initial advance or it runs like a dog. Your ear is the best way to set the timing unless you're using an open exhaust and can't hear the enging ping.
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