For advanced AP users only -

I have an cobb sf intke, a greddy catback and the ap. I added the stage 2 and removed the boost pill like the instructions said. The car ran perfect, a lot better than stage 1, but after data logging and reviewing the spreadsheet data, it showed results much different than the AP unit was actually reading.
LTFT- i was told to watch out for anything over +/-8, i was getting 0 almost the whole time spiking to 1.7 ocasionally ok thats fine. looking at the data log it said that it was running at times 9.3, and 2.3 the entire rest of the time, WTF, is the data log wrong or is the AP wrong? Cause I was watching the STFT and LTFT and neither were outside that -/+8 on the AP screen at any time.
Knock Retard was fine and never showed anything over .7.

Should I send in the data to Cobb, just stick to stage 1, or ask them about to different data between the AP unit and the Data Log??

 

Some ap users run stage 2 without a turboback exhaust but you are not suppose to run it (downpipe) check map descriptions

 

If you have a 2010, the AP for some reason doesn't register the fuel trims. However, the data log is correct so use that.

 

You shouldn't be running a stage 2 tune with the stock cat.

You don't need to change out your DP, but at minimum you need a HFC or test pipe and CBE.

 

so you cant use the ap stage 2 map if you have a full catless setup?

 

i think they're saying you cant run it if you have a stock cat, or catback. stock dp is ok

 

Ive talked to Cobb and a bunch of tuning guys and they are saying that the stock downpipe flows really well its just the stock cat that can be restrictive.

 

Ya your right about the LTFT a lot of the time it wont read anything, its weird. But the data log showed that it was running fine jus some spikes on the STFT up to around 8.2-8.7 for like a cpl tenths of a sec then back to 2.3. I just wanna take care of the engine ya know!!

 

Ok, if you want opinion, here's what I would do: Run Stg I until I had a full TBE.

 

custom tune if you want to take care of the engine.

 

Was told that running the DP/HFC was essential to stage 2.
It allows for more boost.

 

You really shouldn't be running a stage two without a full TBE. The DP I hear is fine stock but the whole reason its a stage two is b/c of the TBE. I was told by cobb you could try and log it but its not recommended.