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tbonez3858

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Two more 2015 Mustang Performance products Added!

I am excited to see AirAid come out with two nice intake kits for the new Mustang GT and Eco Boost models. Their intakes are not "tune required" so you don't have to subject your brand new car to any factory warranty debate if any issues arise.
What is the point of adding a CAI without a tune (srs question)? Isnt the entire value of a CAI to increase air to the engine and hence you have to adjust the tune to benefit from it? Maybe Im missing something here and without a tune Im feeling we are going to see minuscule real world gains with a CAI with no tune.
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Husker

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What is the point of adding a CAI without a tune (srs question)? Isnt the entire value of a CAI to increase air to the engine and hence you have to adjust the tune to benefit from it? Maybe Im missing something here and without a tune Im feeling we are going to see minuscule real world gains with a CAI with no tune.
Good question, does the same hold true for exhaust system mods?
 
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Nick@JDM

Nick@JDM

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What is the point of adding a CAI without a tune (srs question)? Isnt the entire value of a CAI to increase air to the engine and hence you have to adjust the tune to benefit from it? Maybe Im missing something here and without a tune Im feeling we are going to see minuscule real world gains with a CAI with no tune.
As long as the size of the MAF housing diameter does not change there is really nothing you have to do tuning wise to compensate on these cars. If you achieve more air flow the MAF sensor will do its job and pick that up. The necessary calculations for the amount of fuel needed to be added will be correct as long as the MAF sensor is scaled to the housing it is in.

If the volume of airflow remains constant the velocity of the air will increase as the housing size decreases and vice versa. Decreasing the velocity of air past the MAF sensor will extend its working range. Going with a larger housing is especially useful on Forces Induction applications but not as much on N/A applications.

2005-2010 Mustangs use narrow-band O2 sensors to control closed loop (idle and cruise) fueling. When you go WOT the computer would enter open loop and fuel as per the MAF calculations. The stock MAF housing on these cars were only 80mm so a larger diameter MAF housing actually increase airflow since that was the bottle neck.

2011+ Mustangs have factory wideband sensors so the car never or at least should not go into open loop fueling when accelerating. It uses the MAF calculations in combination with the widebands to determine proper fueling. The stock air boxes on these cars are a real CAI and do a pretty good job. Their MAF housing size was increased to about 87mm. Since the throttle body is only about 80mm the MAF housing is no longer the bottle neck. There are some gains to be had with a higher flowing filter but not much.

Installing new intakes on 2011+ Mustangs is mainly for aesthetics and to get more rumble out of the engine bay. Obviously future testing on the 2015s will determine if this concept is still true.

Cat-back exhausts do not require any tuning. If you install long tube headers and high-flow or not cats then we have to make changes so you don't get a MIL for cat efficiency.
 

tbonez3858

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As long as the size of the MAF housing diameter does not change there is really nothing you have to do tuning wise to compensate on these cars. If you achieve more air flow the MAF sensor will do its job and pick that up. The necessary calculations for the amount of fuel needed to be added will be correct as long as the MAF sensor is scaled to the housing it is in.

If the volume of airflow remains constant the velocity of the air will increase as the housing size decreases and vice versa. Decreasing the velocity of air past the MAF sensor will extend its working range. Going with a larger housing is especially useful on Forces Induction applications but not as much on N/A applications.

2005-2010 Mustangs use narrow-band O2 sensors to control closed loop (idle and cruise) fueling. When you go WOT the computer would enter open loop and fuel as per the MAF calculations. The stock MAF housing on these cars were only 80mm so a larger diameter MAF housing actually increase airflow since that was the bottle neck.

2011+ Mustangs have factory wideband sensors so the car never or at least should not go into open loop fueling when accelerating. It uses the MAF calculations in combination with the widebands to determine proper fueling. The stock air boxes on these cars are a real CAI and do a pretty good job. Their MAF housing size was increased to about 87mm. Since the throttle body is only about 80mm the MAF housing is no longer the bottle neck. There are some gains to be had with a higher flowing filter but not much.

Installing new intakes on 2011+ Mustangs is mainly for aesthetics and to get more rumble out of the engine bay. Obviously future testing on the 2015s will determine if this concept is still true.

Cat-back exhausts do not require any tuning. If you install long tube headers and high-flow or not cats then we have to make changes so you don't get a MIL for cat efficiency.
Thanks for dropping the knowledge on me! I really appreciate the detailed explanation. :headbang:
 
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Nick@JDM

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Great info and want to add I've used you guys in the past and would recommend to anyone.
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