dan,
no thread hijack... i think this thread got there long ago.. i just like talking technical with people that know their stuff the whole injector thing has been known for a while.. it started when I built and tuned a guys SR for road race and he kept coming back because his AF's kept creeping after about 2mins of open track. Scott called me during one of his tunes and asked about this same situation. I don't use them anymore and he doesn't recommend or use them either... but as long as you are a healthy bit under the max duty, which 600's are good for about 400rwhp maxed.. then you have no worries. bring some coronas over and step into my airconditioned motor build room at my house and we'll bust out the big $$ mitituyos and put together a monster KA