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  #71  
Old 17-06-2015, 08:40 AM
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Originally Posted by matto20v View Post
Now, now RJ... old ways too soon...
Not that, no way.

Just thought he had more to do with E-tune by iaperformance rather than anything to do with Ecutek...reading from the iwsti threads.
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Last edited by RJ999; 17-06-2015 at 08:51 AM.
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  #72  
Old 17-06-2015, 10:59 AM
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What it comes down to , is the airflow meter needs to be rescaled to suit the improved airflow or use of a aftermarket ECU and lose the MAF . It comes down to Volumetric Efficiency calculation. Factory Ecu uses the airflow meter in its VE calculation ,Injector flow , latency , engine capacity , fuel pressure , manifold pressure, type of fuel. When any of these parameters are modified they need to be rescaled.

Some cold air intakes change the airflow BEYOND the reading capabilities of the factory MAF making rescaling redundant. Power Fc compensates by allowing other MAF sensors to be fitted Nissan etc then rescaled. Some aftermarket ECUs allow this or ditch the MAF in VE calculation . The factory ECU is stuck with the factory MAF.

Volumetric Efficiency Tuning 101 .
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  #73  
Old 17-06-2015, 11:10 AM
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Originally Posted by amtrapid View Post
What it comes down to , is the airflow meter needs to be rescaled to suit the improved airflow or use of a aftermarket ECU and lose the MAF . It comes down to Volumetric Efficiency calculation. Factory Ecu uses the airflow meter in its VE calculation ,Injector flow , latency , engine capacity , fuel pressure , manifold pressure, type of fuel. When any of these parameters are modified they need to be rescaled.

Some cold air intakes change the airflow BEYOND the reading capabilities of the factory MAF making rescaling redundant. Power Fc compensates by allowing other MAF sensors to be fitted Nissan etc then rescaled. Some aftermarket ECUs allow this or ditch the MAF in VE calculation . The factory ECU is stuck with the factory MAF.

Volumetric Efficiency Tuning 101 .
Good info troy :thumbup::thumbup::thumbup::thumbup:

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  #74  
Old 17-06-2015, 11:44 AM
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Originally Posted by matto20v View Post
Now, now RJ..

You've just spent $10,000+ on an engine rebuild to earn some credibility and forum-respect around here. Don't go back to your old ways too soon...

Yeh nothing to do with the blown head gasket.
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  #75  
Old 17-06-2015, 12:46 PM
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Quote:
Originally Posted by amtrapid View Post
Some cold air intakes change the airflow BEYOND the reading capabilities of the factory MAF making rescaling redundant
Cheers, exactly what I was trying to suggest but that was far better put and more succinct.
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