Ignition timing......... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

sixnine · 03-03-2003, 06:33 PM

This is for the gearhead mechanics out there. I believe my timing is a little slow, and I want to advance it but am not sure how much. I know a lot of dedicated gearheads can pretty much tune their motor by ear, but not me. Can I get a couple of recomendations on what to advance it to? My 350 is basically freshened up with a Holley Contender aluminum intake, Edelbrock 1406 Carb and an HEI ignition with vacumn advance. I'm looking to get the optimum advance I can without making the motor detonate. How much is that (guestimating of course!)?

ChevLoRay · 03-03-2003, 07:45 PM

Works for me. I have an Edelbrock Performer, with a 1901 Edelbrock Q-Jet, headers, RV cam and dual Flowmaster 40's running 2.5-inch pipes from the collectors through the mufflers and out. Since I'm apparently running 3.07 gears, it does okay, but doesn't tend to "lite 'em up" on take-off unless prodded fairly aggressively. No run-on, no pinging. Burning regular grade gas.

sixnine · 03-03-2003, 09:54 PM

Thanks ChevLoRay,

I'll try it tomorrow and let ya know where I ended up.

03-03-2003, 06:33 PM	#1
sixnine Longtime Member Join Date: Oct 2002 Location: Over Yonder (DFW) Posts: 171	Ignition timing......... This is for the gearhead mechanics out there. I believe my timing is a little slow, and I want to advance it but am not sure how much. I know a lot of dedicated gearheads can pretty much tune their motor by ear, but not me. Can I get a couple of recomendations on what to advance it to? My 350 is basically freshened up with a Holley Contender aluminum intake, Edelbrock 1406 Carb and an HEI ignition with vacumn advance. I'm looking to get the optimum advance I can without making the motor detonate. How much is that (guestimating of course!)? __________________ Rokcrln - *"I'm a major car addict so trying to go as low buck as possible is like asking a coke head to use flower to save money."* 1972 C10 Short Step -http://67-72chevytrucks.com/vboard/s...d.php?t=261405

03-03-2003, 07:45 PM	#2
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	10 Degrees BTDC... Works for me. I have an Edelbrock Performer, with a 1901 Edelbrock Q-Jet, headers, RV cam and dual Flowmaster 40's running 2.5-inch pipes from the collectors through the mufflers and out. Since I'm apparently running 3.07 gears, it does okay, but doesn't tend to "lite 'em up" on take-off unless prodded fairly aggressively. No run-on, no pinging. Burning regular grade gas. __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.

03-03-2003, 09:54 PM	#3
sixnine Longtime Member Join Date: Oct 2002 Location: Over Yonder (DFW) Posts: 171	Thanks ChevLoRay, I'll try it tomorrow and let ya know where I ended up. __________________ Rokcrln - *"I'm a major car addict so trying to go as low buck as possible is like asking a coke head to use flower to save money."* 1972 C10 Short Step -http://67-72chevytrucks.com/vboard/s...d.php?t=261405

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