Contray to popular belief, the CCC system is not the handicap many people make it out to be. However, it still can be improved on and here is a list of improvements. I will list them in two parts. First part will list mods that apply to all versions of the CCC system. Second part will be mods for the SBC version of CCC.
Fuel pressure regulator as most replacement mechanical fuel pumps put out too much pressure. The factory fuel pressure is 7 PSI.
Large float inlet valve seat, usually .135 size.
Use high grade accel pump seal to avoid swelling issues.
Use stock thickness airhorn gasket, the thicker gaskets throw off the M/C solenoid travel setting.
3 wire heated O2 sensor because they are faster, more accurate, longer lasting, and don't cool off at idle. You especially want this upgrade with headers.
PC stem seals on both the intake and exhaust valves. Umbrella seals on the exhaust valves allow too much oil into the exhaust stream and effects O2 sensor accuracy.
Dual snorkel aircleaner.
Advance ignition base timing a couple of degrees.
Adjust secondary air vane spring tension for optimum operation.
Chevy specific mods include:
Drill the idle tubes to .034.
Drill the accel pump discharge ports to .029.
Drill the choke pullout restrictor to .016.
Install a "N" secondary hanger. Hot 305s like CV secondary rods while 350s like AH secondary rods.
Use a 87 or 88 Chevy ECM and install ZZ4 PROM. The ZZ4 PROM is a GM engineered PROM chip with a hotter tune than the factory installed chip as it was offered with 350 swap kits for 305 powered 3rd generation F bodies. It can handle more cam duration than the stock chip.
Fuel pressure regulator as most replacement mechanical fuel pumps put out too much pressure. The factory fuel pressure is 7 PSI.
Large float inlet valve seat, usually .135 size.
Use high grade accel pump seal to avoid swelling issues.
Use stock thickness airhorn gasket, the thicker gaskets throw off the M/C solenoid travel setting.
3 wire heated O2 sensor because they are faster, more accurate, longer lasting, and don't cool off at idle. You especially want this upgrade with headers.
PC stem seals on both the intake and exhaust valves. Umbrella seals on the exhaust valves allow too much oil into the exhaust stream and effects O2 sensor accuracy.
Dual snorkel aircleaner.
Advance ignition base timing a couple of degrees.
Adjust secondary air vane spring tension for optimum operation.
Chevy specific mods include:
Drill the idle tubes to .034.
Drill the accel pump discharge ports to .029.
Drill the choke pullout restrictor to .016.
Install a "N" secondary hanger. Hot 305s like CV secondary rods while 350s like AH secondary rods.
Use a 87 or 88 Chevy ECM and install ZZ4 PROM. The ZZ4 PROM is a GM engineered PROM chip with a hotter tune than the factory installed chip as it was offered with 350 swap kits for 305 powered 3rd generation F bodies. It can handle more cam duration than the stock chip.
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