Setting timing on an 81
Thread Starter
Le Mans Master
Joined: Oct 2004
Posts: 6,314
Likes: 508
From: South-central Missouri
Setting timing on an 81
I took in a basket case; an 81 which had more than one brush with a Omar the part time camel driver and self proclaimed auto mechanic (I never saw as many dangling vacuum hoses and dangling electrical connectors with no place to go, AND cut wires on one car ever, if you know what I mean!). Anywayz, it has been rescued from Omar's place (while Omar was using the camel as a prop for a sex education seminar, the owner towed the little Vette to my place for some TLC and to get it ambulatory, for starters).
Well, anyway... I got it running...technically speaking, but I am hoping someone can tell me how to set the timing on an 81. I understand it has a "CCC" (computer of sorts) behind the driver's seat - not sure it is even there still - but, can tell me how to verify it is working properly?
Thanks in advance.
P.
Well, anyway... I got it running...technically speaking, but I am hoping someone can tell me how to set the timing on an 81. I understand it has a "CCC" (computer of sorts) behind the driver's seat - not sure it is even there still - but, can tell me how to verify it is working properly?
Thanks in advance.
P.
Le Mans Master
Joined: Aug 2010
Posts: 9,272
Likes: 17
Le Mans Master
Joined: Jan 2006
Posts: 9,192
Likes: 27
From: Boca Raton Florida
Are sure all the 81 CCC systems are connected?
There are several: TPS and F/A mix solenoid on the carb itself, non vac advance electronic HEI dizzy, vac sensor on the firewall, temp sensor on the manifold etc...
A1 has it right in the other thread, 12 to 14 for base timing with the 4 pin connector disconnected, engine warm. Reconnect and give it a try. Be sure and check/clear any codes, if it has codes the CCC will run in Open Loop and the timing will not advance correctly.
There are several: TPS and F/A mix solenoid on the carb itself, non vac advance electronic HEI dizzy, vac sensor on the firewall, temp sensor on the manifold etc...
A1 has it right in the other thread, 12 to 14 for base timing with the 4 pin connector disconnected, engine warm. Reconnect and give it a try. Be sure and check/clear any codes, if it has codes the CCC will run in Open Loop and the timing will not advance correctly.
