I know the whole K&N CAI not needing a tune thing has been beat to death. But I want to know if anyone found a tune for it to use with a Diablosport Predator. I just bought one(thanks 05SatinGT). Also has anyone else who has the K&N noticed that their car seems to be running a little rich?

 

My local tuner said most K&N will run lean, but he hasn't dyno'ed mine yet.
This is the first time I've even heard anyone asking if it runs rich.

 

Same thought I had... I can't imagine why it would run rich.

 

Doug dynoed a stock mustang with k&N and it was found to have a nearly perfect a/f ratio right with stock mustang a/f. Period.

 

That's why I ain't paid the tuner to dyno mine.

 

In the end however... Having custom tunes from Doug on the K&N made it twice as good as it was . But I did my mods in stages.. and I had the K&N on for about 20k miles before I went to Doug with the need for more speed.

 

Well I finally got the SCT with a custom dyno tune.
I couldn't believe it, but before the tune the K&N ran a little richer than stock. ( but my stock was not too rich or lean)
I had run the K&N for a couple thousand miles without a tune, maybe the computer adjusted it.
When I ran it a couple of weeks ago, we noticed it was running rich so I had to give it the tune. Plus, fine tuning means more HP.