how much will K&N help?
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Elder User
Joined: Mar 2004
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how much will K&N help?
I'm looking at doing some mods on my 97 f-350 psd cc e4od, I tow a ***** trailer often but speed is not what im looking for. I was wonder how much of a gain in MPG will I see with K&N hi-flow set up, how much with new exhaust, How much together? I want to try and find out if it is realy worth it to me. so if any body has this set up tell me what sort of gains you got with the new system. thaks much J
Senior User
Joined: Dec 2004
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From: New York
You will notice about 3-4 MPG increase and alot more power from 1500 RPM to redline, alot more low end. now my dad has a f-150 w/the 5.4 and did the K&N FIPK and Borla exhaust w/3.55 gears and he got 3-4 MPG better....even doin 80+, and even towing, but around town, you really wont notice much of a difference because your constantly stopping and going. so i think it really is worth it
Senior User
Joined: Dec 2004
Posts: 399
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From: New York
no, you will see some power gains, we felt it in my dads truck while accelerating up the onramp to the thruway, but we felt alot more power w/the exhaust as well, mostly because when you just have the air filter, your sucking in alot of air, but your not releasing it, so you wont see much improvement until the exhaust
Posting Guru
Joined: Feb 2004
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From: IOWA
You won't see much gains of either, mpg or power, with just the K&N; with both you might notice a little bit. The trick with both of them is to let your engine breath better, able to get more air in and get rid of the exhaust quicker, resulting in significantly cooler EGT's, which help a lot when towing. K&N probably claims 20+hp gains, but on a turbo diesel you won't see that. Exhaust will also claim about the same, and I think with both of them together you would see it. It seems like a lot of money to gain just a few hp, but it's worth it, especially if you are looking at chips or tuners, those are what will make a big difference in how your truck pulls.
Logistics Pro
Joined: Oct 2004
Posts: 4,738
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From: FL
don't even bother..... Go w/ an actual tymar intake or equivilent.... for a cheap homemake one.... NAPA FIL6637.... you need to fabricate one piece from pvc, and the other a coupling.... piece of cake....you will notice the engine is louder.... normal as i found out....
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Posting Guru
Joined: Feb 2003
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From: The Great Plains
Originally Posted by F-250 diesel
You will notice about 3-4 MPG increase and alot more power from 1500 RPM to redline, alot more low end. now my dad has a f-150 w/the 5.4 and did the K&N FIPK and Borla exhaust w/3.55 gears and he got 3-4 MPG better....even doin 80+, and even towing, but around town, you really wont notice much of a difference because your constantly stopping and going. so i think it really is worth it
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Postmaster
Joined: Feb 2002
Posts: 2,773
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From: Bonney Lake, WA
At the risk of offending some people......... as good as the K&N is for a gasser, it isn't the best choice for a turbo diesel, especially after the filter element has been cleaned a few times. The suction generated by a turbo diesel can/will draw particles through the element and into the turbo. Sure, the K&N filter reduces restriction, but at the expense of filtering ability.
Get an intake with a huge filter, so the air doesn't have to enter through a small passageway, and you can also maintain filtering ability at the same time.
Get an intake with a huge filter, so the air doesn't have to enter through a small passageway, and you can also maintain filtering ability at the same time.
Logistics Pro
Joined: Oct 2004
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From: FL
Originally Posted by mybigredford
if you do the 6637 filter thing, will the turbo squeal like the tymar intake.
