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

**swervin ervin** · 12-23-2000, 11:22 PM

They have both mechanical and vacuum advance. They also have what is called an ESC (Electronic Spark Control). The only thing the ESC does is control spark knock. You notice the distributor plug has 4 pin plug on it.

It also has a knock sensor in the engine block (in front of the starter). When the knock sensor detects spark knock it sends a signal to the ESC contoller (mounted behind the glove box, above the heater). The ESC will retard the timing to stop the spark knock.

As a side note, I have removed all that mess on my 85 C10. I installed a MSD Pro-Billet HEI.

Hope this helps,

------------------
Mike

1985 Chevy C-10
Mike's 73-87 Chevy Pickup Site

12-23-2000, 11:22 PM	#2
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	They have both mechanical and vacuum advance. They also have what is called an ESC (Electronic Spark Control). The only thing the ESC does is control spark knock. You notice the distributor plug has 4 pin plug on it. It also has a knock sensor in the engine block (in front of the starter). When the knock sensor detects spark knock it sends a signal to the ESC contoller (mounted behind the glove box, above the heater). The ESC will retard the timing to stop the spark knock. As a side note, I have removed all that mess on my 85 C10. I installed a MSD Pro-Billet HEI. Hope this helps, ------------------ Mike 1985 Chevy C-10 Mike's 73-87 Chevy Pickup Site __________________ Mike 1985 Chevy C-10



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.