Ford Racing Cold Air Intake Modification

[Mustang50lx]

I found 2 Bullitt intakes and a Ford Racing intake on Facebook. I start to communicate and make a deal and all 3 are real slow to get back to me.

 

[06 T-RED S/C GT]

If they don't get back to you? consider the Steeda 90mm intake from Steeda Autosports, it's the very same CAI as the original Ford Racing intake that was on the factory equipped 2007-08 Shelby GT and 2006 Shelby GT-H (Hertz) edition. First image is the Ford Racing Branded/Steeda 90mm CAI on a bone stock 2008 Shelby GT. Second image is the Steeda Branded 90mm CAI and the last image is the Ford Racing Branded 90mm CAI manufactured by Steeda Autosports.

 

[Mustang50lx]

I finally have one paid for and on the way off Facebook as of tonight.

 

[06 T-RED S/C GT]

Which one did you get, the Bullitt or Ford Racing Branded/Steeda 90mm CAI?

 

[Mustang50lx]

Ford racing. The same one you can still get for a V6.

 

[Miker]

If you really want the Ford Racing CAI they came on the Bullitt & Shelby GT’s so used ones will be out there. Or you can go the V6 tuner route then get the Bullitt tube thru Ford (the route I went but there aren’t many left in the system....were 5 left when I got mine). The stock tube (80mm) won’t fit the FR Bullitt CAI (85mm) w/o heating it up & forcing it on.
1 more thing, if you get 1 & you have a SCT X3-4 tuner to access the Options list in the tune you can use the MAF calibration for the C&L Street CAI (83mm) until you can get it tuned as this is close enough to the FR Bullitt 85mm MAF so all will operate fine....been there, done that is why I’m Putting this info here.

This is in regards to a 2005 4.6.
I got an SCT X4 recently and running the canned 91 octane tune for a stock intake really did change the car. It runs smoother, pulls harder throughout the curve and even sounds different.
Not being able to leave well enough alone I found a Ford Racing intake that is the same as the one that came stock on the Bullitts. The only intake choice in the canned 91 octane tune that comes close in maf size is the C&L street that I believe is an 83mm maf size. The Ford Racing I believe is an 85mm. In the GlassTop09 post above you can see that's exactly what he did.
I would rather not get a custom tune and am wondering what the effects would be with a 2mm difference in maf size would be?
Would I be able to see if there was an issue in the short term fuel trim in the data logging screen?
Here is a link to a thread where the intake I have coming is discussed.

The 08 Bullitt intake, everything you wanted to know and more, Dynotesting... - The Mustang Source - Ford Mustang Forums

GT Performance Mods - The 08 Bullitt intake, everything you wanted to know and more, Dynotesting... - Hey guys, Here's my Holiday present to everyone. Our friend Kevin at Clevenger Ford parts here sold me a 08 Bullitt Mustang intake. From there I installed it on two different cars, an 05 and 06...

themustangsource.com

 

[Miker]

Here is a picture of the intake. Kind of confusing because it is different than the FRPP or Steda but still says Ford Racing on it.

 

[Miker]

I tried to pm Glasstop09 about this but he hasn't been on in a while.

 

[GriffX]

Here is a picture of the intake. Kind of confusing because it is different than the FRPP or Steda but still says Ford Racing on it.

AFAIK, this is the CAI you could buy via Ford Racing, the original Bullitt (which I bought) had 2 additional resonators attached below and the Ford logo not painted. The Bullitt had also a special hood insulator to seal the box to the hood.

AFAIK (and that is not much) the ECU is using a VE table for volumetric efficiency or filling of the cylinder. That is a table where the air mass in the cylinder in relation to revs and load is noted. When you go on full throttle the ECU goes to open loop, so basically switches off the lambda feedback loop and uses only the VE table combined with the MAF values.
So bigger intake, VE is going up on WOT. If the value is false, the amount of fuel injected is wrong.

(pretty sure my explanation has faults, but you get the idea)

PS: For the different CAI diameters your ECU needs a translation from voltage to air mass regarding of the diameter at the MAF location.

 

[Dino Dino Bambino]

AFAIK, this is the CAI you could buy via Ford Racing, the original Bullitt (which I bought) had 2 additional resonators attached below and the Ford logo not painted. The Bullitt had also a special hood insulator to seal the box to the hood.

AFAIK (and that is not much) the ECU is using a VE table for volumetric efficiency or filling of the cylinder. That is a table where the air mass in the cylinder in relation to revs and load is noted. When you go on full throttle the ECU goes to open loop, so basically switches off the lambda feedback loop and uses only the VE table combined with the MAF values.
So bigger intake, VE is going up on WOT. If the value is false, the amount of fuel injected is wrong.

(pretty sure my explanation has faults, but you get the idea)

The tuner should remap the MAF sensor transfer curve to compensate for a larger diameter intake pipe, thus ensuring that the commanded air:fuel ratio remains correct.

BTW, everything you said above is spot on, and the Ford Racing intake used in the Shelby GT is exactly the same as the Steeda CAI except for the Ford logo.

 

[Miker]

The tuner should remap the MAF sensor transfer curve to compensate for a larger diameter intake pipe, thus ensuring that the commanded air:fuel ratio remains correct.

BTW, everything you said above is spot on, and the Ford Racing intake used in the Shelby GT is exactly the same as the Steeda CAI except for the Ford logo.

The intake I am getting is not the one that came in the Shelby GT that was designed by Steeda. That CAI has a 90mm maf.
The one I am getting is a Ford Racing branded CAI which is the same one beside the absence of the resonators that came stock on the Bullitts in 2008 and 2009.
I heard from GlassTop09 and he had actually measured the maf in the model I am getting and it measured 83mm. That explains why Doug from C&L posted in the linked article that it was an 83mm maf. Even though in Fords own literature they list it as an 85maf.

The 08 Bullitt intake, everything you wanted to know and more, Dynotesting... - The Mustang Source - Ford Mustang Forums

GT Performance Mods - The 08 Bullitt intake, everything you wanted to know and more, Dynotesting... - Hey guys, Here's my Holiday present to everyone. Our friend Kevin at Clevenger Ford parts here sold me a 08 Bullitt Mustang intake. From there I installed it on two different cars, an 05 and 06...

themustangsource.com

Fords literature.

https://www.trackey.ford.com/download/instructionsheets/FordInstShtM-9603-GTB.pdf