its quite simple actually.cheap ones give crappy results.
but it also depends on the intensity...like 6000k ones are white-ish sumtimes muddy like u mentioned.the 8000k ones are the clear ones.if im not mistaken.
I'd like to know what injectors are good upgrades for this engine (rb20det - 270cc). So far everybody come up with the Rx7 550cc injectors (direct fit, need to mod the socket a bit) or the GTR injectors.