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@ David Redszus IMO, further up the intake tract obviously helps vaporization, at the cost of total O2 available. everything is a tradeoff. at extreme fuel delivery fuel can puddle on the backs of the intakes valves, this can wet the piston top resulting in decreased or no boundary layer regardless of the amount of atomization from the injector. The mixture will never be truly homogeneous. A carb can get a lot closer to a truly homogeneous...

Good one! Troy Patterson TMPCarbs.net TMP Carbs _________________ Perception is subjective.

The 441 76cc head and 441X 80cc heads were 69-70 350 and 400 only. The LT-1 came with a 041 291, 292, 041, 186 or 187 casting number as they were 11-1 engines as well as the Z-302 engine in that era. The 10-1 engines also used the same castings The L-82 vette used the 487 and487X heads but lower comp.8.5-9.Thatsaid they would not have been factory installed in a 67 camaro. _________________ Real Race Cars Don't Have Doors

Yes I know this and is why when referring to carbs and open loop I said 'most carbs' and 'for this purpose' There is of course many carbs both OEM and A/market that use closed loop tuning. But for the purpose of this topic, and as i tend to ramble on for long enough to bore people I decided to just look at carbs from the open loop aspect. _________________ Craig Johnston Ford, performance & Vintage engine...

OK, I had to redo the graphs. When I increased the power by 10 times and the weight by 10 times I got much different results. I needed to set Coefficient of Drag = 0.0 for them to be the same. New graphs follow. Any EMC contestants want to post their torque curve?

No one's mentioned direct injection, even though it was a feature of one of the first commercial FI gasoline cars, the 1954 Mercedes Benz 300 SL and is in hundreds of thousands of current vehicles. It enables greater V.E. and higher compression ratios plus wider control of AFR under various conditions, contributing to significant power and economy gains. Also, WOO, TF/FC, etc. could use carbs if they chose, but nobody does......

Those have been my preference until Crane went south for a while. I too hope they start building them again. Very good lifter. Bret _________________ SuperFlow 600 & DTS Dyno Equipped Shop

One trick I observed at the Robt Bosch research center in Germany, was to point the injector upstream, against the flow of air. It produced much greater evaporation of the fuel and increased performance while reducting fuel consumption.

I have found that lubrication is the largest variable. ARN

Craig Johnston: Just to clarify ... There are/were several CARBURETORS which opperated in a CLOSED LOOP situation. They called it "feed back" but, it is/was the same thing. I have two Holley 750 cfm four barrel carburetors with feed back dithering valves on the primary side and some Quadra-Jets also. There were a number of single barrel and two barrel carburetors which also have this function so, it is NOT synonomous with...