This is what it states:
"Essentially there is no engine heat to transfer to the bowl and bowl cover."
"AS A RESULT" (1.40 mark)
"Thermoquad calibration metering is leaner BECAUSE mixture enrichment is not needed to COMPENSATE for FUEL EXPANSION POWER LOSSES."
"AS A RESULT" (1.51 mark)
"Exhaust emissions are reduced without seriously affecting power engine perfromance"
Context is everything in this case.........
It was Shrinker who put me onto thermoquads when I asked him about improving the design of the Holley Carbs:
Carburetors that use emulsion are turbulent flow designs. carburetors that use a booster or a single point sensing position for the air flow are turbulent flow designs. It is necessary to design for turbulent flow because of the vacuum curves relationship to CFM produced by single point sensing (boosters, single dump tubes like a C&S, old vintage carbys). There is nothing wrong with turbulent flow designs. They are quite capable of controlling a fuel curve in many ways. The solid fuel carbys are turbulent flow designs. Turbulent flow enables correction for the natural enrichment due to increased air flow. If an engine requires a different AFR at maximum torque compared to max HP then a turbulent flow carby can do that. The internal passages of a turbulent flow carby are sized so that the onset of turbulent flow occurs at the desired place in the CFM. Once turbulent flow is established the AFR goes leaner. Then as the CFM continues to increase the AFR will enrich. This creates the desired characteristics of lean cruise and rich full load combustion. If emulsion is not used the passage sizings are the only controllers and that means that the carby is specifically designed for that engine as in OEM production line stuff. If emulsion air is used the carby can have a wider range of application although theoretically none of the applications are as good as zero emulsion designing. The difficulty with emulsion is the air interrupts the fuel flow. Solid fuel designs achieve more linear fuel distribution into the air stream.
If there was anyone that really understood this stuff it was Bruce. Thanks for the laughs but its time to put this one to bed..........
