no increase in airflow 5000+

[johnalomu#11]

I was out dattalogging my car tonight and turned the boost to 25psi..... my friend who tuned my car found out that i am flowing the same amount of air at 5000rpm as 7000rpm... Please let me know if you think it would be the stock: cams / intake man. or exhaust man..... that is all i could think of... does anyone know if these parts will still increase power below 5000 rpm?? i am looking for my car to come alive more as it should have more of a powerband..... and help would be great,

 

[Sean485]

What are you reading airflow with? The ecu can only output up to 1600Hz through the diagnostic port. If your not using the logger to read ariflow you might check the "fuel cut" switch on the maft. I accidentally had the fuel cut switch turned to "remove fuel cut" on my maft and it held the Hz reading at a 2248Hz even though I was moving a decent amount more air than that.

 

[TalonTSi-AWD91]

What are you reading airflow with? The ecu can only output up to 1600Hz through the diagnostic port. If your not using the logger to read ariflow you might check the "fuel cut" switch on the maft. I accidentally had the fuel cut switch turned to "remove fuel cut" on my maft and it held the Hz reading at a 2248Hz even though I was moving a decent amount more air than that.

With an EPROM ECU you can reprogram it to log up to 3200Hz, although it's not listed in his mods.