i have a 2002 t/a that has a 451 lsx with ALL the bells and whisltles with a f1c prochrger.

I'm trying to decided on an s/d tune or keep a MAF tune? I have the 100mm power maf but the pcm is MAXED out. The weather changes here in lower AL every 20 minutes and would love to keep the MAF tunes.

Is there another pcm that could be used that has a higher calabration program for the maf? I'm not wanting to spend a tone of $$$ to get this going.

Thanks.

 

I think you need to get rid of the MAF. With a good tune you will not know the difference.

 

ok. Will there be a difference in AFR's in 20deg vs. 100deg weather??

 

Personally, I prefer to keep the MAF for the reasons you stated (weather changes). I tuned my own FI LS6 car with a MAF first, then later changed to a SD tune. Even with it "dialed in", I found myself needing to make too many changes for it to run consistently. So I went back to the MAF and left it.

But, like I said, that's just my opinion.

Good luck!

 

No question... 2 Bar Speed Density custom operating system...

 

I believe with the powr maf in a 4" housing you could support big hp. You would need to fool the pcm and cut alot of tables in half...I'm no tuner so I couldn't give you the specifics. From what I have read most tuning experts (Greg Banish, Tuning School) prefer a maf set up as long as you can meter the airflow. Speed Density is more reserved for race cars where changes are made all the time.

 

Just scale the airflow/IFR tables etc & be done with it.(Dont forget the timing references will change)
The airflow limits will be there in an SD or maf tune so you will have no other choice if the stock pcm is to be retained.

 

IFR tables...... what is that?

 

Injector flow rate. This needs to be scaled by the same percentage as your airmass model (VE or Maf)to keep the fuelling in check.