what should the no load AFRs be on my street ported FC with an E6K? Right now they are in the 11.5-12.0 range, as soon as I lean it out to ~13.5-14.0:1 it gets very "lopey", should I tune for a smooth reving motor, or for the AFR? Also, once I adjust a value, that's it, right, do I need to take an additional step to save that info to the ECU? I am trying to get as much of the corrections, and base map done as I can, then maybe I'll try my hand at blowing up the motor So I'll be posting some questions, about general corrections etc for the E6K. the car currently runs O'k, but I have two maps set up by two different tuners, and the corrections, and set-up info are a little different. Carl

 

Basicly, what i did was to get the car to temp, and then pull fuel, ~2-3% at a time til I got in the mid 13s, then I would move to the nextt range. When I did this, I ended up with a lean spot at ~2750 rpm where the engine will hunt, if I richen up the 2500, and the 3000 ranges, I have to go to ~11.5:1 to get rid of the hunting behavior. Do you need to "goose" the throttle after each adjustment before taking out more fuel in a particular range? thanks, Carl

 

Lean it out till it starts to surge.
Surging indicates it's too lean.
A lot has to do with ignition timing also.
All you're doing is trying to tune for better gas mileage.


-Ted

 

Well, gas milage is not too much concern at this point, the car is hesitating now, so i think I will put the fuel back. Carl

 

Yeah, I just keep leaning until it lean surges and put a little fuel back.
That's the end of that.


-Ted