Difference between K&N CAI 91 tune & regular 91 tune

[Dube]

2 quick questions:

On the U7140, what is the difference between the 91 Octane tune and the K&N CAI tune (which mentions to use 91 Octane)

And if I install a 62mm Throttle body, what would be the best tune to install with this install OR would I need to tweak and existing one??

Thanks!
06 Mustang GT
K&N CAI

[mikel]

The K&N tune is specific for the K&N CAI.

Skip the TB, not needed until you are making over 500 rwhp....

[keeno]

I just purchased a used K&N fipk....it says a tune is not necessary for this cai......?

[concoursd]

K&N is lying when they say that. very few people get away with their intake with the stock tuning. Your best bet is to use the K&N tune in the Predator.

[Rustang]

The difference is n the m.a.f. With cai tunes v the 91 tune

[mikevolz]

Hi, what hapens if I have the regular "91 tune set up and later the K&N "91" tune on top of it, because of the K&N cai I put on later? Does the new K&N tune overwrite the the old one, or do I have to put back to stock before? I mean, the car runs good.

Thanks, Mike