The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Somebody tell me what this is please, other then a black box

my4by2 · 08-07-2011, 11:47 PM

I believe that is the knock retard ECU for the distributor - should have a knock sensor in the block that runs to it. They used this to retard the timing automatically when it sensed any engine knock.

08-07-2011, 11:47 PM	#7
my4by2 Registered User Join Date: Dec 2010 Location: Hot Springs, AR. Posts: 1,215	Re: Somebody tell me what this is please, other then a black box I believe that is the knock retard ECU for the distributor - should have a knock sensor in the block that runs to it. They used this to retard the timing automatically when it sensed any engine knock. __________________ 1977 Chevrolet K30 LWB Crew Cab 497HP Mast Motorsports 6.0L LY6 HO engine GM NV4500 5-speed, Centerforce clutch + NP205 D60 + 14-bolt FF w/ Eaton posi + disc brakes Skyjacker 2.5" full spring lift w/ Nitro shocks Custom paint + interior http://67-72chevytrucks.com/vboard/s...d.php?t=435722