Setting timing with cam advanced - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72PicKuPmAn · 09-15-2002, 01:25 AM

Is there any tricks to setting the timing when you advance a cam, the one in my motor is 2 degrees, and I have been having a tuff time getting it right, I should go buy a light, I got a vacume gauge.

Thanks

Taylor

72PicKuPmAn · 09-15-2002, 01:15 PM

Anybody???

shadetree · 09-15-2002, 01:47 PM

Advanced/retarded cam shouldn't make ignition timing any harder to set, and if all you have is a vacuum gauge, go for it. You want the highest vac reading @ idle, with the steadiest needle.
Drive it, after setting the timing as above, listening for knock/ping/ under acceleration. If knock is heard, back off timing a little.
A timing light is good investment, but maybe one could be borrowed, or even rented if $$$$ is tight.

09-15-2002, 01:25 AM	#1
72PicKuPmAn Registered User Join Date: Feb 2000 Location: Gassville, AR Posts: 246	Setting timing with cam advanced Is there any tricks to setting the timing when you advance a cam, the one in my motor is 2 degrees, and I have been having a tuff time getting it right, I should go buy a light, I got a vacume gauge. Thanks Taylor __________________ '72 S/S Chevy- in progress

09-15-2002, 01:15 PM	#2
72PicKuPmAn Registered User Join Date: Feb 2000 Location: Gassville, AR Posts: 246	Anybody??? __________________ '72 S/S Chevy- in progress

09-15-2002, 01:47 PM	#3
shadetree Senior Member Join Date: Dec 1999 Location: Knightstown, in, usa Posts: 2,525	Advanced/retarded cam shouldn't make ignition timing any harder to set, and if all you have is a vacuum gauge, go for it. You want the highest vac reading @ idle, with the steadiest needle. Drive it, after setting the timing as above, listening for knock/ping/ under acceleration. If knock is heard, back off timing a little. A timing light is good investment, but maybe one could be borrowed, or even rented if $$$$ is tight. __________________ 1970 long fleet, 355 4 speed, primer, walnut goodies

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