FREE HORSEPOWER: Modifications to the stock CAI that help flow!

Wow, you are fast...quoted me before I could delete. Thanks for the info.
Maybe I'll do this mod when I need a new filter...

Why would ford engineers not leave the honeycombs on the grill all opened up?

So removing the foam could gain you 5bhp iam removing it right now.

jrsimon27 said:

Why would ford engineers not leave the honeycombs on the grill all opened up?

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Likely for aerodynamics. Too much air entering the front grill would act as a drag on the car. I'm sure they balanced that with the air intake's need and came up with what they now have on the car as the best solution.

Wow iam impressed i removed the carbon part and the car pulls harder from 5500rpms all the way to redline. I dont know if a placebo effect but it does feel stronger up top.

Well even if it is a placebo, it worked for me so its a mod that's staying.

Interesting read.. I did notice whilst browsing an article on the Mustang GT4 it retains the stock airbox and intake as well.

Also of not, off subject, the GT4 dumps the GT350 manifold and flat plane crank and uses Xplane crank and stock Coyote manifold. apparently it gives better power as the flat plane has a different firing order?

Gloucesternige said:

Interesting read.. I did notice whilst browsing an article on the Mustang GT4 it retains the stock airbox and intake as well.

Also of not, off subject, the GT4 dumps the GT350 manifold and flat plane crank and uses Xplane crank and stock Coyote manifold. apparently it gives better power as the flat plane has a different firing order?

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Yes there are three manifold options, well actually more than that but to summarise them all:

- F150 Manifold: The most torque, peak power around 6000RPM and I believe it these the GT4 cars run, not the stock Coyote one.
- Stock Gen2 Coyote: Good torque, but not so linear, peak power around 6400rpm and makes a touch more power up top than F150.
- GT 350: Linear torque curve, peak power around 7300rpm and more power than stock, typically gains on stock Coyote IM after 5500rpm, having ran this manifold if you like revs you will love this as the car feels a lot stronger past 5500rpm and it will rev freely to 8000rpm if you so wish.
- BOSS 302 IM: A very cheap option, kind of sits between the stock gen2 Coyote IM and 350 manifold but loses out on torque to both.
- Cobra Jet: Holy grail when coupled with GT500 or Twin65 TB, the best power up top and peak power is 7800rpm and people rev this as high as 8500rpm plus. Also on a proper custom tune has good torque but of course a stock coyote or F150 manifold will typically have more power/torque in the 1500-4000rpm range, but if you rev or race quarter mile this manifold will get you into 10s area on a sticky tyre.
- Gen3 coyote IM, a new revised manifold for MY18 which seems similar to the GT 350 manifold but is not the same, of course most likely not compatible with older generation due to the direct injection.


The different manifold options are there to fit your driving style, though I do believe the GT4 race cars actually use F150 manifolds as the want the extra torque for corner exits as track driving generally you exit corners in the 3000-4500rpm range where torque is important.

On a road car and having done it, the 350 IM with 350 TB when correctly tuned drives simply gorgeous and that extra power up top feels great, the Coyote loves revs and it great when it rips your face off even in 5th beyond 6000rpm.

jrsimon27 said:

Wow iam impressed i removed the carbon part and the car pulls harder from 5500rpms all the way to redline. I dont know if a placebo effect but it does feel stronger up top.

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Anybody got any pictures of the part being referred to in this mod?

J_UK said:

Anybody got any pictures of the part being referred to in this mod?

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They are in my original post.

Gibbo205 said:

They are in my original post.

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Doh! I thought this was a recent addition, went back a few pages and couldn’t find anything. Read your original post back when it was originally posted, which was a little while back. Apologies :doh: :headbonk:

[MENTION=13598]Gibbo205[/MENTION] not sure if you saw this

http://www.mustang6g.com/forums/showpost.php?p=2084346&postcount=198

DarkestHour said:

[MENTION=13598]Gibbo205[/MENTION] not sure if you saw this

http://www.mustang6g.com/forums/showpost.php?p=2084346&postcount=198

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Nice do you have before and after or are the three runs comparisons?

Gibbo205 said:

Nice do you have before and after or are the three runs comparisons?

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I don't, but guy with a stock tune and aftermarket intake put down 385.

I already had the mishimoto tube and the k&n filter. I removed the emissions filter and ground down the posts for the emission filter. Data logged afterwards on my Lund tune and max flowed 44.694 MAF in lbm per min @7478.5 RPM.

Previous log prior to emission filter removal showed max flow at 43.083 @ 7371.3 RPM.
For comparison at the same RPM with out the emission filter it flowed 44.454 @ 7386 RPM.

Thanks for all the previous info guys. Glad I took the time to read this thread and the modify.