additional injector

[Todd King]

     <<<
     > >If you want more power and the engine can handle it you can use the
     > >cold start injector as a water injector this then allows you to run
     > >more boost without worring about detonation.....
     >
     > I was thingking of an additional injector that activates on specific
     > rpm. What do you think?
     
     The big problem in doing this with EFI is that in general the O2
     sensor will "see" the fuel mix go richer then the ecu will lean off
     the other injectors to compensate and try to keep the mix at 14.7 to
     1....thats why you need to either re tune the ecu or get a
     replacement that you can tune. The good thing about an aftermarket
     ecu is that you can tune it how you want not how the factory set it.
     >>>
     
     Well actually the car will not be under closed loop control (at least 
     the current ones that I know of) at wot so this correction you refer 
     to won't happen at wot. The enrichment should work fine; we (v6) refer 
     to these devices as "seventh injectors" and see them alot. And most 
     cars go to (or try to) around 12.5:1 or so at wot too.
     
     Todd       tking at scic.intel.com