anybody any idea about the following:
i have a half bridged engine so the secondaries are bridged and the primaries are streetport.
would it help with emissions when i switch of the secondary injectors at idle with a special map in the powerfc for only the primaries?

 

I was under the impression that the secondary injectors were already off at idle... At least on the stock FC ECU, they come on around 3800 RPM.

Of course, I don't know what sort of magic voodoo you have working in your engine, but why would having the secondaries on at idle be needed?

-=Russ=-

 

it's a 13B-REW with half bridge, 850 prim and 1300 secs

 

Your secondary throttle plates are closed up to like 15% throttle opening (someone know exact percentage?) and theres very little flow through your secondary ports till the throttle body opens (basically the only flow is back and forth). So running injectors in the secondaries that turn on before a determand load is just a bad idea. your gonna have fuel pooling and i cant imagine actually being able to get the damn thing to idle that way without a huge loppy unstable rich stinky running motor. Not to mention all that raw fuel thats pooling would be a good way to wash away all the oil from your side seals, corner seals etc. accelerating wear significantly. YOUR INJECTORS SHOULD BE STAGED.

~Mike..........

 

so what happens if i reduce the openings on the secondary throttle plates from 15% to 0%? will it idle/help the emissions?