CFM large mouth intake kit review - Ford Powerstroke Diesel Forum
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Old 04-25-2012, 11:21 AM
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CFM large mouth intake kit review

I know it's not a big performance gainer and most everyone knows that that but if you didn't now you do. It's not going to give you a noticable difference in horse power per say but I can absolutely tell the difference in the way the truck runs in general. It idles much better and seems to have a little more pull throughout the entire rpm range. Fuel economy I haven't really figured up yet but with the increase in air flow you get from this kit I would say fuel economy may be a tad better as well. It's super easy to install and I love how on my 04 it eleminates the useless throttle plate. Not to mention it comes with a huge boost tube much larger than the stock tube. While other kits may be cheaper I think this one is the best complete kit other than maybe the banks kit but it was well worth it's price tag in my opinion. Others may disagree but my truck runs a lot smoother throughout now so that's a win in my book.
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Old 04-25-2012, 01:21 PM
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Thanks for the review!


Last edited by dfuzz78; 04-25-2012 at 01:30 PM.
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Old 04-25-2012, 01:26 PM
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I think it's all in your head and if you put it on the dyno it would prove that. There is no increased air flow into the cylinders because the intake manifold and the heads are the restriction point.

If you have a 1/4 nozzle on a hose it doesn't much matter whether the hose is 3/4" or 1", It's still only going to flow what will go through the 1/4" nozzel.

I have a carbon fiber Largemouth on my truck. It may change the intake sound but it really isn't flowing more air. Congrats on the purchase anyway. They look cool and give you a place to pull boost for a mechanical gauge or hook up some Meth/water injection or NOS.
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Old 04-25-2012, 01:48 PM
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I noticed a smoother idle as well when I had mine. Also noticed more noise. I ended up removing it since it leaked oil all the time due to the flat style gasket.

I tapped the stock elbow and put that back on since it has an "O-ring" gasket seal. No more leaks.
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Old 04-25-2012, 02:26 PM
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I have the carbon fiber large mouth kit. Only reason i got it is because it already had the drilled and tapped ports for my water injection nozzles and boost reference.

Last edited by strokin6L; 11-09-2013 at 07:21 AM.
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Old 11-08-2012, 05:24 PM
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Quote:
Originally Posted by PGreenSVT View Post
I think it's all in your head and if you put it on the dyno it would prove that. There is no increased air flow into the cylinders because the intake manifold and the heads are the restriction point.

If you have a 1/4 nozzle on a hose it doesn't much matter whether the hose is 3/4" or 1", It's still only going to flow what will go through the 1/4" nozzel.

I have a carbon fiber Largemouth on my truck. It may change the intake sound but it really isn't flowing more air. Congrats on the purchase anyway. They look cool and give you a place to pull boost for a mechanical gauge or hook up some Meth/water injection or NOS.
Then why in my shop do I have 1/2 inch and 1 inch air lines going into 2 identical Ingersoll guns... one will break a half inch bolt the other won't. It's all about volume and I would think less restriction any where in the intake line would be better.
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