Timing help please - The 1947 - Present Chevrolet & GMC Truck Message Board Network

MyakkaJeff · 12-30-2008, 05:25 PM

What should the initial timing be on a 283?

**Wrenchbender Ret** · 12-30-2008, 06:59 PM

The factory setting varies by the year & model, trans, & carb type. A good starting point is about 6 degrees BTDC. Set the initial timing with the vacuum advance disconnected.

MyakkaJeff · 12-30-2008, 07:29 PM

Thanks Wrenchbender Ret, I set it to 6 degrees and had to bring the rpms up a little to keep it running. But then I noticed the #7 header tube was turning red hot so I shut it down. What is causing that?

LONGHAIR · 12-30-2008, 08:36 PM

Generally glowing headers comes from "late" timing but overly lean could cause it too.
Which way did you move when you adjusted it?

MyakkaJeff · 12-30-2008, 09:39 PM

When I first started I was at 28.5 degrees according to my digital timing light with vacuum plugged. Had to turn it ccw to get it to 6 degrees. It died twice so I had to bring up the idle. It might be running lean. I'll try to adjust that. It's an Edelbrock 1506. I think I need more initial advance.

12-30-2008, 05:25 PM	#1
MyakkaJeff Junior Member Join Date: Dec 2006 Location: Florida, Myakka River Posts: 143	Timing help please What should the initial timing be on a 283? __________________ '63 C10 lwb flatbed '66 C10 lwb stepside '68 C10 lwb stepside (parts) '68 C10 lwb fleetside (17 yr old son's ongoing project) '03 HUMMER H2 (wife's) '06 3500 flatbed liftgate (My work truck)

12-30-2008, 06:59 PM	#2
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,190	Re: Timing help please The factory setting varies by the year & model, trans, & carb type. A good starting point is about 6 degrees BTDC. Set the initial timing with the vacuum advance disconnected.

12-30-2008, 07:29 PM	#3
MyakkaJeff Junior Member Join Date: Dec 2006 Location: Florida, Myakka River Posts: 143	Re: Timing help please Thanks Wrenchbender Ret, I set it to 6 degrees and had to bring the rpms up a little to keep it running. But then I noticed the #7 header tube was turning red hot so I shut it down. What is causing that? __________________ '63 C10 lwb flatbed '66 C10 lwb stepside '68 C10 lwb stepside (parts) '68 C10 lwb fleetside (17 yr old son's ongoing project) '03 HUMMER H2 (wife's) '06 3500 flatbed liftgate (My work truck)

12-30-2008, 08:36 PM	#4
LONGHAIR just can't cover up my redneck Join Date: May 2004 Location: Columbus OH Posts: 11,414	Re: Timing help please Generally glowing headers comes from "late" timing but overly lean could cause it too. Which way did you move when you adjusted it?

12-30-2008, 09:39 PM	#5
MyakkaJeff Junior Member Join Date: Dec 2006 Location: Florida, Myakka River Posts: 143	Re: Timing help please When I first started I was at 28.5 degrees according to my digital timing light with vacuum plugged. Had to turn it ccw to get it to 6 degrees. It died twice so I had to bring up the idle. It might be running lean. I'll try to adjust that. It's an Edelbrock 1506. I think I need more initial advance. __________________ '63 C10 lwb flatbed '66 C10 lwb stepside '68 C10 lwb stepside (parts) '68 C10 lwb fleetside (17 yr old son's ongoing project) '03 HUMMER H2 (wife's) '06 3500 flatbed liftgate (My work truck)



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