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I am a mechanical engineer; however, my areas of expertise are mechanical vibrations, signal analysis and damage detection. I must admit I have not given this a lot of thought. What I am after is a rough generic guide. However, since you have asked for detail let's say: The original system: 1...

"Some details on the manifold, engine capacity and where you want the power band would help" Sorry, assume both manifolds are equally efficient. If you know the optimum single carb. cfm how can engine capacity and power-band help? Anyway, say 250ci and rpm between 1800 and 4500. This would...

Say you can estimate the optimum cfm for a single intake engine (one carburettor any type), how can you estimate the optimum cfm for 3 carburettors running on the same engine? This is not for using Webers, I want rough estimate for general use assuming that the style of carburettor is not...

Thanks mate. You have a website with LPG information with component selection haven't you? If so can you provide me with a link that will get me to the information as the one I tried didn't work.

You agree with hemi you mean? I understand what altering the lobe separation angle does, that was not my question, but thanks anyway. So neither of you think that the possible improvements in cylinder filling when running wider lobe separation angles are important? It is beneficial when a...

I forgot to ask about peoples thoughts on exhaust to inlet ratio (cylinder head flow) when using LPG/Propane.

I have been discussing the idea of running wider lobe separation angles for LPG/Propane engines than you would on an equivalent Petrol/Gasoline engine with my colleagues and I am interested in hearing your ideas. If you agree that wider separation angles should be used to what extent do you...