Quote:
Originally Posted by Gaz64
It's all about getting the engine cleanly onto the main system with the minimum amount of extra fuel from the accelerator pump.
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Ok,
I agree and understand you thus far. However, then why are so many people mentioning that they are running 00 exhaust valves when they should be running something with value i.e. 50.
In regards to the emulsion tube being related to the cylinder capacity, I think the Etubes are related to the camshaft to a certain extent. Of course the cylinder does play some value but I think the camshaft is more closely related.
Cylinder capacity will dictate the volume of air but the camshaft will control the air flow and time / RPM.
I am running a .680 lift camshaft and the Webers hide this very well. Transition is smooth and I plane out to the main at a Max 12.5 A/R
Also I have noticed that when your transition circuit is not correct, you will experience poor acceleration off of corners.
In addition, upon decelleration, I am get little to no backfire simply by changing the tubes to achieve a proper transition; not the mixture screws.
Also regarding the chart. It seems that the chart that is posted on CC is incorrect according to your chart. The chart posted above indicates F8 is richer than F7, and your chart shows F2 is richer than F11.
This is why I suggest that all alike tube diameters should be is 1 family (say 7.5)then a 2 nd family (8.0) and so forth. After grouping these tubes alike is diameter size then we can look at the orientation of the holes to decide rich or lean. By mixing the tubes with diameter size you really can not tell if you are going rich or lean because there are too many variables.
Any thoughts?