A/F Ratio during boost ramp up

[turbo6man]

Hi, When I start to stage up my motor and it goes from a vacuum and transitions into boost, what A/F ratio are you striving for? I have a wideband O2 and I am shooting for 11.3 at my wide open throttle, but I am not sure what to shoot for on the Vac to boost transitions. Thanks, James

 

[Dusty Bradford]

Around 12.5-13.0 at 0# boost. As boost climbs, fade the A/F towards your WOT setting of 11.3.

 

[bison]

Data log some passe some WOT on the t-brake and whittle away at it. Id throw as much timing at it as possible on spool up and taper the a/f like Dusty explained.

 

[turbo6man]

Sorry for the late response. That is great information! I just installed the 4 sensor input datalogger by innovate technologies I will now be able to record the wide band and I set the the four inputs to RPM'S/boost/TPS and I am trying to get the last one to work for knock but it is not working yet. Thanks again, James

 

[Reggie West]

Be very very careful with timing on Gen 6. They are not accurate. Add 6 degrees to whatever number you have in the timing map.

You will kill the motor if you assume the timing is right between the motor and the ignition map.

 

[turbo6man]

Thanks I will keep that info for the future, I currently have the boost at 15psi and the timing on the accell map is set to 20 degrees. I am running 104 octane unleaded.