Not sure if you have it adjusted by now, but try one of the JLT tunes if they're in your tuner. I had the same issue with my f150 (used the 4" spectre tube). The JLT is a really short CAI so it's really close to the amount of air you get with spectre. In my case, JLT tune with +16% MAF adjustment ...

meh...the sleeve chokes the airflow down quite a bit (what's the point of buying a 4" tube if you're going to reduce it down to 3"?). You can still adjust the tune to compensate and add more fuel. It's just a matter of finding the best starting place for the tune. Of course, if you're going to run ...

btw JohnTre08f150, if you make small increments, the computer WILL adjust to compensate for a bad tune. Just don't make huge changes when you adjust things. Make sure you check the LTFT and STFT for each change to make sure what you're looking for is happening. When I first tried the K&N tune with ...

IIRC, if you have a negative LTFT that means the computer is removing fuel from the engine...if you increase the MAF curve wouldnt that make the LTFT even lower because you'd be telling it to add more fuel??

That's a good point tomahawk -- I would have thought the tuner could calculate the NOV for you with the tire revs & axle ratio. Maybe they give you the option if the user doesn't know their axle ratio? I would think though, if you don't know your axle ratio, you probably shouldn't be messing with ...

U7151
v.9r08
2007, Ford F150 SCrew 5.4L 3V.
Dual exhaust (southern comfort pkg)
Spectre 4" CAI

previous adventure here: http://diablosport.com/index.php?name=PNphpBB2&file=viewtopic&t=22618

I've previously installed a spectre CAI and got it tuned to that setup; Now, if I were to install some LT ...

You Should try running the 85mm tune and see how that works.

Well, I'm not sure which tune the "85mm" is since its not listed in the available tunes...however I did manage to get it dialed in.

I tried a few different tunes, but most were worse than the origionally suggested K&N tune (even with ...

Ok, checked tonight on the way home... Why are the LTFT's so high and the STFT seems ok??

2k rpm, highway driving with cruise
STFT: -2 to +4%
LTFT: 21% pretty steady

This is with the K&N 93 octane tune (93 oct gas in the truck of course)
MAF curve is already at 25% (it set the CEL if I left it at ...

Ok, This is for the Spectre CAI WITH the inner black choke removed

Got the K&N performance tune on there...increased the MAF 25%

Steady Driving ~65mph, OD is off. (3rd gear)
Short Term Fuel Bank #1 .. floats between -1.5 and 7
Short Term Fuel Bank #2 .. floats between -1.5 and 4


I'm not sure of ...

U7151
v.9r08
2007, Ford F150 SCrew 5.4L 3V.
Dual exhaust

Just curious, but since the Predator has canned tunes for AirAid,K&N and a few others, but not Spectre (there must be a differences between tunes or you wouldnt have them in the first place) -- what do you guys think would be the closest ...

Awww...so close. I've got an 07 F150 5.4L 3V and a 01 Pontiac GTP you can tinker on...and local too