Newb ?, How will Fast 90 affect AFR?

[Tony]

Help a newb out fellas. I installed a ported Fast 90 and a Volant CAI on my 06 GTO A4. I had the car dyno tuned a few months ago with these mods: MTI G1 (228/232 113), LT's, catless, Yank3600. AFR set to 12.8 at wot.
My question is how far off will the AFR be at wot after the Intake & CAI?
Would it be unwise to make a few WOT runs before I get it re-tuned?
I don't have a wideband yet (on order), so I can't tell what the AFR is currently. Besides, even if I did have a wideband I'm not sure I would know how to adjust the AFR since I'm new to hp tuners.

[Braciole]

I just did the fast 92 Ported
Throwing some codes I see my post.
I disconnected the battery to clear the computer
so far so good
Mike

[Tony]

I'm not throwing codes, car runs great. Just wondering if I'll do any damage to my engine if the AFR is too lean

[Braciole]

Yes you will do Damage if your car is too lean Detination is the worst
thing you could burn a hole in one of the pistons or multiple pistons
Your better off on the rich side to be safe the worst you can do is foul a set of plugs
Mike

[eficalibrator]

Changing the cold air kit will affect how the MAF reads. Since the MAF is the primary source for all fuel calculations at high speed, you stand a very good chance of seeing a different WOT air-fuel ratio because the PCM does not yet know the new physical behavior of the MAF when combined with the cold air kit.

The fix is pretty simple, and involves datalogging AFR error at each MAF breakpoint to develop a new curve that correctly represents your engine's hardware.

[Tony]

The fix is pretty simple, and involves datalogging AFR error at each MAF breakpoint to develop a new curve that correctly represents your engine's hardware.

Simple for you maybe, but not me. Hopefully my wideband will arrive soon and I can start learning how to tune this sucker.

[eficalibrator]

Hopefully my wideband will arrive soon and I can start learning how to tune this sucker.

There are ways to greatly accelerate your learning curve...

[BBA]

I did a tune on my buds LS1 Vette, he put a big intake (B&B I think) and a 100 MM MAF, plus the shorty headers. It threw codes but ran fine. I did a complete STFT VE tune then STFT MAF tune and all the codes went away. The thing runs really strong and even get's better mileage. It did lose a little bottom end but gained a whole lot of midrange power.