kahmikahze
Member
- :
- 2006 Black Cherry Mazdaspeed 6
And Cobb always up with an answer to problems! Y'all rock. Thanks, guys.
Cobb AP Discussion Thread
- Thread starter djdanny5000
- Start date
monsoon725
Member
- :
- 06 Speed6 GT
I just monitored some live data on my AP for the first time. Im going to have to go back and read this entire thing again. My max boost according to the AP was 22psi and my AFR dropped to 9.9 with a Stage1+ 93 map. WAHHHH
When your watching live data why not add a log in there too.
Watch Afr, Boost Air Temps, Boost Pressure, Maf G/S, Long term Fuel Trims, RPM, Timing, Knock Retard... and the most important of all is fuel pressure. there are some other pretty ones but they dont really matter much for tuning ie: actual pedal position, voltage, speed, etc...
In your situation that sounds about right, the stockish maps run really rich if at high load values or seeing some knock conditions.
but thats a ton of boost for a stage 1 map. For reference i hold 17-18psi of boost with an 11.8 - 11.9 afr (stage 1 map modified by me), but have sick fuel pressure drop offs. Im seeing anything under 1400psi, my worst dip was to around 900. i think the only thing saving my motor is the fact that it has not been above 0 degrees C in Canada land for the last little while. And this could also be the other contributing cause of my fuel pressure dips is the weather.
I have been told by a very all knowing user here that drops in fuel pressure under about 1400psi are really bad because to compensate the injector pulse widths become longer, so the car is adding fuel but not a well atomized as it does with high pressures. This could lead to some knock conditions and possibly a failure of my motor if any detonation was to occur.
Because i cant afford a hpfp to hold better fuel pressure i need to turn the boost down
sadness.
COLES NOTES: you should log your fuel pressure too just to make sure its not dipping really badly.
Watch Afr, Boost Air Temps, Boost Pressure, Maf G/S, Long term Fuel Trims, RPM, Timing, Knock Retard... and the most important of all is fuel pressure. there are some other pretty ones but they dont really matter much for tuning ie: actual pedal position, voltage, speed, etc...
In your situation that sounds about right, the stockish maps run really rich if at high load values or seeing some knock conditions.
but thats a ton of boost for a stage 1 map. For reference i hold 17-18psi of boost with an 11.8 - 11.9 afr (stage 1 map modified by me), but have sick fuel pressure drop offs. Im seeing anything under 1400psi, my worst dip was to around 900. i think the only thing saving my motor is the fact that it has not been above 0 degrees C in Canada land for the last little while. And this could also be the other contributing cause of my fuel pressure dips is the weather.
I have been told by a very all knowing user here that drops in fuel pressure under about 1400psi are really bad because to compensate the injector pulse widths become longer, so the car is adding fuel but not a well atomized as it does with high pressures. This could lead to some knock conditions and possibly a failure of my motor if any detonation was to occur.
Because i cant afford a hpfp to hold better fuel pressure i need to turn the boost down
sadness.COLES NOTES: you should log your fuel pressure too just to make sure its not dipping really badly.
monsoon725
Member
- :
- 06 Speed6 GT
at 20.44lbs of boost, I had a DI fuel pressure of 1709, a KR of 0, and an AFR of 10.73.....
I certainly was logging
I certainly was logging
monsoon725
Member
- :
- 06 Speed6 GT
at 20.44lbs of boost, I had a DI fuel pressure of 1709, a KR of 0, and an AFR of 10.73.....
I certainly was logging
I certainly was logging
monsoon725
Member
- :
- 06 Speed6 GT
I've cut out the extraneous data....but I don't know how to upload a non-pic??
solidtrance
Member
- :
- HIS: 2005 RX-8 WWP GT 6MT* HERS: 2006 Speed6 BCM 6MT**
same way you post a pic. Just respond and attach it to the response.
monsoon725
Member
- :
- 06 Speed6 GT
photobucket won't let me upload an xls file...where to upload?
solidtrance
Member
- :
- HIS: 2005 RX-8 WWP GT 6MT* HERS: 2006 Speed6 BCM 6MT**
Use the "advanced post" option and upload the .xls to you post directly. No need to host it somewhere else. Right from you computer to M247.
monsoon725
Member
- :
- 06 Speed6 GT
monsoon725
Member
- :
- 06 Speed6 GT
No redline because of traffic. Ill try and redo.
The only contributory mods are a Cobb SRI, Cobb turbo inlet, SLS test pipe
The only contributory mods are a Cobb SRI, Cobb turbo inlet, SLS test pipe
monsoon725
Member
- :
- 06 Speed6 GT
No redline because of traffic. Ill try and redo.
The only contributory mods are a Cobb SRI, Cobb turbo inlet, SLS test pipe
The only contributory mods are a Cobb SRI, Cobb turbo inlet, SLS test pipe
Last edited:
jorgea3281
Member
I look at your list bova80, but no stage1 with FMIC. Does anyone have one?
Does anyone have one?kahmikahze
Member
- :
- 2006 Black Cherry Mazdaspeed 6
glad to see it's back up!
for everyone else, if your AP gives you funky reading while using one of these maps, follow the guidance given by Travis on page 98 of this thread.
monsoon725
Member
- :
- 06 Speed6 GT
Why is a map needed for a turbo inlet? I understand it flows better, but that air is already metered....
