Torque Cars chat forums - View Single Post - Ecotek CB-26P Valve fitted

***HDi fun*** · 09-02-2008, 09:45 PM

The valves are nonsense items in my opinion. They just bleed some extra air into the intake manifold under certain conditions. It may well have worked twenty years ago prior to the universal adoption of fuel injection and catalytic converters.

Basically they allow the fuel / air mixture ratio to be made leaner when the engine requires little or no fuel, such as under trailing throttle conditions (overrun).

Petrol cars with 3 way closed loop cats do not benefit at all as the O2 sensor causes the ECU to alter the mixture ratio to correct the imbalance. A lean mxiture will increase HC emissions and ultimately wreck the cat.

Even in the early 1980's there were mixture compensating devices fitted as standard even to such crude cars as SU carb fed Montegos. And, they did work. To a point. A point that the Ecotek could not improve upon. Even then!

As for the boost stuff, that's a different matter. It is an intensive detergent cleaner and had been shown to offer good results under tests with older and badly maintained cars.

Ecotek 100 is to be avoided in my opinion. Decent engine oil will stand up to usage between services without the addition of other additives.

Try AMSOIL if you want the very best of synthetic engine oils.

09-02-2008, 09:45 PM	#3 (permalink)
*HDi fun* Moderator Torque Junkie Car: Peugeot 406 Join Date: Apr 2006 Location: SOUTH EAST Posts: 2,582	Re: Ecotek CB-26P Valve fitted The valves are nonsense items in my opinion. They just bleed some extra air into the intake manifold under certain conditions. It may well have worked twenty years ago prior to the universal adoption of fuel injection and catalytic converters. Basically they allow the fuel / air mixture ratio to be made leaner when the engine requires little or no fuel, such as under trailing throttle conditions (overrun). Petrol cars with 3 way closed loop cats do not benefit at all as the O2 sensor causes the ECU to alter the mixture ratio to correct the imbalance. A lean mxiture will increase HC emissions and ultimately wreck the cat. Even in the early 1980's there were mixture compensating devices fitted as standard even to such crude cars as SU carb fed Montegos. And, they did work. To a point. A point that the Ecotek could not improve upon. Even then! As for the boost stuff, that's a different matter. It is an intensive detergent cleaner and had been shown to offer good results under tests with older and badly maintained cars. Ecotek 100 is to be avoided in my opinion. Decent engine oil will stand up to usage between services without the addition of other additives. Try AMSOIL if you want the very best of synthetic engine oils.