Which intake
JK Jedi Master
Joined: Feb 2008
Posts: 12,907
Likes: 185
From: Maine
This is what a Jeep engineer said in response to a cold air/higher flow intake question. Granted, he addresses the 4.0L engine, but he talks about the low rpm range as asked about by the original poster here.
As with any "system" on the vehicle, such as the air induction system, there is a certain amount of compromise that needs to be designed into it. What I mean is that you could maximize flow, but at what cost to filtration and protection of the engine? Essentially we design the stock intake system to meet the airflow requirements of the engine while still protecting it from fine particle ingestion. Will a cold air intake possibly flow a little more? Perhaps, but it may potentially allow larger particles through that the stock paper element would not.
In the case of the TJ, the 4.0L is an engine optimized for low RPM power and torque - the potential increase in airflow that a cold air intake might offer would not really play into the typical RPM range that a 4.0L generally operates in.
As with any "system" on the vehicle, such as the air induction system, there is a certain amount of compromise that needs to be designed into it. What I mean is that you could maximize flow, but at what cost to filtration and protection of the engine? Essentially we design the stock intake system to meet the airflow requirements of the engine while still protecting it from fine particle ingestion. Will a cold air intake possibly flow a little more? Perhaps, but it may potentially allow larger particles through that the stock paper element would not.
In the case of the TJ, the 4.0L is an engine optimized for low RPM power and torque - the potential increase in airflow that a cold air intake might offer would not really play into the typical RPM range that a 4.0L generally operates in.
JK Enthusiast
Joined: Oct 2009
Posts: 185
Likes: 0
From: Northwest
This is what a Jeep engineer said in response to a cold air/higher flow intake question. Granted, he addresses the 4.0L engine, but he talks about the low rpm range as asked about by the original poster here.
As with any "system" on the vehicle, such as the air induction system, there is a certain amount of compromise that needs to be designed into it. What I mean is that you could maximize flow, but at what cost to filtration and protection of the engine? Essentially we design the stock intake system to meet the airflow requirements of the engine while still protecting it from fine particle ingestion. Will a cold air intake possibly flow a little more? Perhaps, but it may potentially allow larger particles through that the stock paper element would not.
In the case of the TJ, the 4.0L is an engine optimized for low RPM power and torque - the potential increase in airflow that a cold air intake might offer would not really play into the typical RPM range that a 4.0L generally operates in.
As with any "system" on the vehicle, such as the air induction system, there is a certain amount of compromise that needs to be designed into it. What I mean is that you could maximize flow, but at what cost to filtration and protection of the engine? Essentially we design the stock intake system to meet the airflow requirements of the engine while still protecting it from fine particle ingestion. Will a cold air intake possibly flow a little more? Perhaps, but it may potentially allow larger particles through that the stock paper element would not.
In the case of the TJ, the 4.0L is an engine optimized for low RPM power and torque - the potential increase in airflow that a cold air intake might offer would not really play into the typical RPM range that a 4.0L generally operates in.