^And that is the ultimate question, are these intakes worthless without a tune? Basically I am running richer and a good tune will bring me back up to a good position but will the intakes help at all or no?

Typically, I would expect intakes to lean cars out, not make them richer when bolted on. I wonder if it has to do with the placement of the MAF sensors.

A tune should fix the A/F for you.

At least reset the ecu

they look nice, but I'm not paying for a loss of power

Doing that now, not going to re-dyno as I feel a battery reset probably will not change anything. 150+ miles v. a battery reset probably would be about the same.

I agree, but at the same time who knows what will happen in the future.

Dreamer, chances are you will pickup a little power as you drive more. I thought I saw somewhere that they made the car run rich. That could be just the ECU adjusting to the new flow of the intakes. The mix should eventually go back to normal, perhaps even lean out a bit.

This might be the case, When Takeda was doing testing with my G37, they asked me to put some miles on my car before they dyno'd it again. After 300+ miles, my G got made power. The Nissan/Infiniti ECU will re learn the new intake. I also have a madgen computer and i have been monitoring my AFR and so far, i went from 11.5 WOT on 3rd gear when i first picked up my car with the new takeda intakes to 12.8 AFR on WOT on 3 gear after 180 miles. I guess my ecu has adjusted to the new intake and 12.5 is optimal according to Cobb.

Hopefully you get better results on your next dyno day given the conditions are the same as the orginal baseline dyno.:tup:

Definately reset the ECU and drive around. . The ECU is probably still expecting the "usual" intake measurements and things are changed so it's getting conflicting reports and having a slow time getting adjusting.. Or I could be talking out of my butt.

I almost pulled the trigger on these but I will wait for see future results.

Leaning towards a Stillen Gen 2 now...

Why the Gen 2? Why not a Gen 3 or Injen?

If anything, go with the Gen 3, short style intakes are not proving to be a good buy with the Z so far, be it heat, not enough tubing, etc., but I would go with Stillen or Injen.

Explanation needed :D

Probably because of the heat shields would be my guess..

gen 3 looks like the way to go.. the short tubed intakes do look purty but i've yet to see anything match the new stillen's numbers