lumis roller barrel TBs are in theory good...however in practice there only a true advantage @ WOT (i like this abb now!) where there is no obstruction to flow,But if your usesing twin injectors per port (say shower type and down near the head toget better drivability) then pooling and acumulation of fuel droplets can form on the barrels at part throttle.
what is 2 @ 285?
I know you knew that....but as BT say, its good to talk!
I have come up (dunno if its original or not) with what i think is the perfect combination of a traditional butterflys tractability and a roller barrels balls out top end.
Imagine a rubber cylinder (thin rubber walls) now if you encircle it with your thumb and forefinger then squeese, the diameter of the tubes gonna get smaller right. bingo, a shape that reflects a venturi, restricts flow, no shaarp edges or steps etc etc. Combine this in a TB and you have almost perfect laminar flow. I just have to think of a way to squeese it evenly from all sides. The easiest way right now is the use of a camera style aperature (the ones made out of tons of plates, which slide at an angle to each other to create a circular hole) with the rubber (petrol resistant of course ) part of the TB body inside it....you could just use a normal throttle linkage (the aperature works by sliding one plane) and then flow would be so smooth, tractable, perfect flow @ WOT etce etc.......what ya think?
BTW, im really knackered, that explains my typing skills.
oh, as far as the mod im doin goes, i will do each individually, first filter, add chip, tune, add zorst, tune. I can do this cause i have the development time. however, i cant when it comes to slapping them onto customers cars..they have to be plug and play, so im hoping to save the parameters of each stage, and hopefully itll be close enough to most cars not to cause a prob....leave it the tiniest bit ruch, just in case.
