ok so my friend just picked up a 3065 kit from buschur and some 680cc injectors from precision, we set the injector latency, and we began to scale the injectors from 609... heres the problem it was pig rich, i kept scaling after 16 minute drives untill we got it down to 504 and the Fuel trim Mid stayed at zero, heres the problem when the car sits at idle (which since its cammed we have set at about 1100) the fuel trim low goes to about +5, what are we doing wrong or not doing, this is on an evo 9, anybody have precision 680s scaled with the latency they could post?

 

bump can anyone help?

 

you want to shoot for +/- 5 ex. fuel trim low -2 & fuel trim mid +3 would be fine. A fuel trim 0 and fuel trim + 5 is fine but I would twick it more. Try to increase the latency from the 11.7v to 14v range .1ms, raise your injector scaling to 518 or try whats below.


try this and let us know

Injector scaling 597

7-2.186
9.4 - 1.413
11.7- 0.957
14- 0.687
16.4- 0.486
18.6- 0.349

 

will definatly try that thanks dude