Im gonna dyno tune my car sometime next week, i wanna know whats the best way to do it..... Open loop or Closed loop? i found my car runs so much more smoother in open loop

help!

thanks

 

closed loop whenever possible. the car goes into open loop (power enrichment mode) when you get on it.

 

Without knowing the details of your setup, modifications, etc., its impossible for anyone to give you anything other than a very general answer.

 

Should run better in closed loop and wide open throttle (WOT) where TPS is over 3.9 volts (not sure about the exact amount) a dyno tune usually only sets advance at 100 MAP (or 95 to be safe from carpet under the pedal :/ ) and a few other tables. Maybe you have a bad 02 sensor or something to make it run worse in closed loop?

Hal

 

the motor is done up to the tee, big cam, reworked heads and intake, 36 lbs injectors, the thing is built like a tank.

it runs way better on closed loop at WOT but for just driving around, stop and go open is better

 

this is what i notice... when it warms up and goes to closed loop, the throttle response goes to ****! almost like it bogs when i start going. why would it do that, its fine when i first start it and it in open loop.

 

it runs like crap in closed loop probably because of your cam, probably nothing you can do except run open loop. Since it runs better in open loop leave it in open loop and tune that way.