TommyDSM
20+ Year Contributor
- 241
- 8
- Aug 2, 2003
-
Somewhere,
New York
I'm tryin to tune my car, and learning alot while doing it. But I need some help understanding how to tune Air Fuel Ratio...
I've picked up some tips, but need some help. Right now I have my Base Fuel Pressure set to 43.5Psi, my Base Timing is set to ~3-5*, MAFT Base set to 4, Mid 1, WOT 2. My Low Trim is around 100, my High Trim is 102. My Car Feels good, except at WOT. On my S-AFC my Max Air Flow is about 1200Hz in Fifth Gear... I'm boosting about 11.6PSI, No Knock.
Now I've been told to Start at 43.5Psi Base Fuel Pressure, Using MAF-T Make Base and WOT Adjustment so I see close to a 2200Hz Figure in 3rd or 4th Gear at WOT with acceptable knock levels (3-7). If I see less or no Knock, Turn Down the Fuel Pressure until I see some.
How do I know when to turn down the Fuel Pressure and Not the MAF-T? By Adjusting the WOT Knob on the MAF-T it will change the Max Hz I see at WOT? And what is Close to 2200Hz? What is the Max Hz I should see at WOT and what is Min Hz I should see at WOT? And is this 2200Hz only at 3rd and 4th? Is it normal I see only ~1200Hz at top of 5th?
Also I have a Stage 3 KeyDiver Chip that Compansate for FIC 750cc Injectors but Right Now It was programmed for Base Fuel Pressure of 36PSI... Will that mess up my tuning? I asked Nate to send me a new Chip for 43.5Psi Base Fuel Pressure... But I'm REALLY thinking of getting the DSMLink....
With my setup, Should I leave the Base Fuel Pressure at 36PSI Since the KeyDiver Chip is programmed for that. And Zero Everything out, then make a WOT Run in 3rd and 4th and see where my Max Hz is? or Should I setup my Base, Idle, MID Knobs and get my Fuel Trims at ~100% then make a WOT Run? Does Richen make the AFC see more airflow or less?
I've picked up some tips, but need some help. Right now I have my Base Fuel Pressure set to 43.5Psi, my Base Timing is set to ~3-5*, MAFT Base set to 4, Mid 1, WOT 2. My Low Trim is around 100, my High Trim is 102. My Car Feels good, except at WOT. On my S-AFC my Max Air Flow is about 1200Hz in Fifth Gear... I'm boosting about 11.6PSI, No Knock.
Now I've been told to Start at 43.5Psi Base Fuel Pressure, Using MAF-T Make Base and WOT Adjustment so I see close to a 2200Hz Figure in 3rd or 4th Gear at WOT with acceptable knock levels (3-7). If I see less or no Knock, Turn Down the Fuel Pressure until I see some.
How do I know when to turn down the Fuel Pressure and Not the MAF-T? By Adjusting the WOT Knob on the MAF-T it will change the Max Hz I see at WOT? And what is Close to 2200Hz? What is the Max Hz I should see at WOT and what is Min Hz I should see at WOT? And is this 2200Hz only at 3rd and 4th? Is it normal I see only ~1200Hz at top of 5th?
Also I have a Stage 3 KeyDiver Chip that Compansate for FIC 750cc Injectors but Right Now It was programmed for Base Fuel Pressure of 36PSI... Will that mess up my tuning? I asked Nate to send me a new Chip for 43.5Psi Base Fuel Pressure... But I'm REALLY thinking of getting the DSMLink....
With my setup, Should I leave the Base Fuel Pressure at 36PSI Since the KeyDiver Chip is programmed for that. And Zero Everything out, then make a WOT Run in 3rd and 4th and see where my Max Hz is? or Should I setup my Base, Idle, MID Knobs and get my Fuel Trims at ~100% then make a WOT Run? Does Richen make the AFC see more airflow or less?
