No - Ford tuned it, but that's beside the point. Let me rephrase, what is the 08 stock GT's maf? Aren't you on your computer at the shop?

I found this for Bullitt

Also found this

 

No I'm not a parts dealer. So I'm not on a computer.

And since you haven't tuned vehicles you wouldn't know what is actually changed in the parameters when you tune on. Not trying to be rude.

 

Don't pull rank on me son. That shows poorly on you. I don't give a fk what you've tuned or haven't. Answer the questions please.

I ask this because I own Ford's 08 Mustang manual and have been frustrated because they don't show Bullitt specifics. They don't even show the FRPP CAI. So I have been seeking specific information. If you don't have knowledge about it then say so.

 

No comment?

 

"The new setup, formally referred to as the '05-'08 Mustang GT 85mm cold-air kit with premium CAL (PN M-9603-GTB; $669), is basically the same air-intake system that highlights the '08 Bullitt Mustang's engine bay. "

So what was the size of the stock 08? See what I'm trying to learn from you?

 

I'm not necessarily trying to pull rank. But I'm telling you what I know and I know why a cai. Requires a tune. And its for a different resistance rating in the maf.

And I said I don't know bullit part numbers or specifics. I just know why the tune is required. The tune does also change some other parameters but it is required for the maf.

 

What do you want me to say? Those numbers are close. the cold air intake one is a little high. I say 15 would be purfect running conditions and tempurature for the cai to show 15 HP gains.

 

Like I said. I don't run parts. I would have to go to the parts department and have them look it up.
Its possible the maf is the same size but has a different resistance value to read more air than a factory maf can read.

 

Fair enough. So the Bullitt 85mm is how much larger than stock?

And does your manual at the shop (I assume you're on computer for details, schematics, etc.) have specifics for Bullitt separate from GT?

 

When have a chance here in a little bit I will see what I can pull up for a bullit.

 

I think some of this kill sheet is exaggerated... However I have beat a few cars that I did not think was possible in my almost stock 07GT.... I just chalk it up to driver error or in one case weight difference ....

 

I need the Vin for the bullit. I can only pull up standard gt information

 

Go back to the old fox operating systems. Larger MAF allowed more air in which leaned out the air/fuel ratio coupled with larger injectors and fuel pump.= the ECM doesnt know that more air or more fuel is entering the engine and it operates just like it did without the upgraded parts. With one or the other,MAF or fuel upgrade, the O2's would just show bad mix and fight to compensate.

Alright, obd2 system is a bit more responsive and complicated. MAF tube upgrade, fuel upgrades, need to be tuned for. Timing and air/fuel respond way too quickly to just "trick" it. ECM will go into a preset fuel map "safe mode" before it will allow it to damage the converters. The ECM's main job is to protect the cats and a lean or rich condition will damage them.

Larger MAF housing without a tune will require a different designed element that will give the ECM a signal that more air is going into the engine which is more complicated than just a reflash to compensate. One thing the obd2 system will not allow is a rich or lean mixture because of possible converter damage. Unless the tune is bypassing some values.

 

This is true. But a larger inside diameter in a maf will slow the overall flow through it causing the maf to read low air flow and run lean.

 

It's actually gonna read lean before it shows low air flow. 02's will pick it up first.

 

Yup. But without tuning for the larger maf diameter it will think its getting too little air.

And the o2s will only pick it up once the o2s get warm enough and it goes into closed loop.

So at first the engine will try to run on a preset set of parameters and the maf will make it fail to idle. Or at least in most cases that I have seen it couldn't idle.

 

Either that or a recalibrated MAF sensor itself. Recalibrated sensors have been used before and work the same way with no tune required. Only problem with that is it wont work if throttle body, intake, or fuel upgrades are done also.

 

As far as I know that's only on old fox bodied cars.
I haven't seen a recalibrated sensor for obd2 vehicles. As far as I know they just recalibrate the tune instead of the sensors.

 

They do make them. They also make replacement element tubes. But in all honesty, a larger MAF housing is not necessary in 05+ mustangs. The housing is really not restrictive and there's no point in going bigger housing unless throttle body is much bigger that the inlet tube and MAF. CAI and inlet tube with stock MAF is fine for most applications.

 

Gotta agree with you there. The other drivers I raced against made a huge error when they tried competing against someone who has many, many years of racing experience.