Road Tune
Oct 19, 2004, 05:05 AM
#4
If the Greddy is recirculated it shouldn't throw it off much, with the intake, you'll have to add fuel across the board, moreso from 2500-4500. You can start with the stage2 map and then add a bit of fuel in that range.
From my work with the MAF sensors, some intakes alter the airflow due to lower velocity throughout the power band (lower Karmann Hz value) so adding fuel across the board helps. Others are only affected at lower RPM at around torque peak (boost peek) so you have to add fuel where it counts in those areas. Others get anomolous readings due to compressor surge, or other turbulence, those are the ones that are unpredictable and difficult to tune, you won't know that until you log alot of data on your car though. But usually if your tune changes frequently no matter what you do, then you should consider changing the type of intake your using, or switching to Map sensor/Boost reference for MAPs
From my work with the MAF sensors, some intakes alter the airflow due to lower velocity throughout the power band (lower Karmann Hz value) so adding fuel across the board helps. Others are only affected at lower RPM at around torque peak (boost peek) so you have to add fuel where it counts in those areas. Others get anomolous readings due to compressor surge, or other turbulence, those are the ones that are unpredictable and difficult to tune, you won't know that until you log alot of data on your car though. But usually if your tune changes frequently no matter what you do, then you should consider changing the type of intake your using, or switching to Map sensor/Boost reference for MAPs
Oct 19, 2004, 05:35 AM
#5
Originally Posted by MalibuJack
If the Greddy is recirculated it shouldn't throw it off much, with the intake, you'll have to add fuel across the board, moreso from 2500-4500. You can start with the stage2 map and then add a bit of fuel in that range.
From my work with the MAF sensors, some intakes alter the airflow due to lower velocity throughout the power band (lower Karmann Hz value) so adding fuel across the board helps. Others are only affected at lower RPM at around torque peak (boost peek) so you have to add fuel where it counts in those areas. Others get anomolous readings due to compressor surge, or other turbulence, those are the ones that are unpredictable and difficult to tune, you won't know that until you log alot of data on your car though. But usually if your tune changes frequently no matter what you do, then you should consider changing the type of intake your using, or switching to Map sensor/Boost reference for MAPs
From my work with the MAF sensors, some intakes alter the airflow due to lower velocity throughout the power band (lower Karmann Hz value) so adding fuel across the board helps. Others are only affected at lower RPM at around torque peak (boost peek) so you have to add fuel where it counts in those areas. Others get anomolous readings due to compressor surge, or other turbulence, those are the ones that are unpredictable and difficult to tune, you won't know that until you log alot of data on your car though. But usually if your tune changes frequently no matter what you do, then you should consider changing the type of intake your using, or switching to Map sensor/Boost reference for MAPs
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