FCI Powerstack Filter - Yamaha YFZ450 Forum : YFZ450, YFZ450R, YFZ450X Forums
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post #1 of 69 (permalink) Old 01-09-2017, 02:32 PM Thread Starter
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FCI Powerstack Filter

Hello Everyone.

Have anyone tried the new FCI Powerstack Filter, I have heard they loss in power , but I think depends about what mods you have.
Please Share your experience if you are using one, it's new recently come out.

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post #2 of 69 (permalink) Old 01-09-2017, 02:52 PM
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I bet they make a huge difference on high flowing ported heads.

You may want to hold off until they prove themselves? I think with your port job and your standard FCI you'll be making plenty of power!

What suspension did you end up going with? Did you make your first race?

Hopefully you placed high!


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post #3 of 69 (permalink) Old 01-09-2017, 03:14 PM Thread Starter
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I bet they make a huge difference on really high flow ported heads.

You may want to hold off until they prove themselves? I think with your port job and your standard FCI you'll be making plenty of power!

What suspension did you end up going with? Did you make your first race?

Hopefully you placed high!
I end up getting MX Long Travel Houser Fox.

But, I Think powerstack should add more power, maybe for raptor because it has dual header and requires more air to go in. must be tested on yfz450r

It's better getting ktm 450sx-f , no more yamaha, with stock ktm you get power than yamaha hoping to get that power, a long term hope
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post #4 of 69 (permalink) Old 01-09-2017, 04:54 PM
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I dyno'd the filter and 3 others last week. On my 2008 YFZ 480 with an R head it did not make more power than the standard filter. But I know on a raptor they work well. We had to cut and stretch my FCI a ton so I assume that was the reason I didn't make more power with it, I know on my buddies YFZ he said it made 1 hp more.
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post #5 of 69 (permalink) Old 01-09-2017, 05:22 PM
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I just bought a Powerstack and FCI for my YFZR. Haven't gotten it yet though. And I'm just buying a bunch of parts right now. I'll put everything on all at once. Idk when that will be. I'm trying to take it apart as few times as possible.[ThumbsUp]

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post #6 of 69 (permalink) Old 01-09-2017, 05:42 PM Thread Starter
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I dyno'd the filter and 3 others last week. On my 2008 YFZ 480 with an R head it did not make more power than the standard filter. But I know on a raptor they work well. We had to cut and stretch my FCI a ton so I assume that was the reason I didn't make more power with it, I know on my buddies YFZ he said it made 1 hp more.
is your friend yfz450r between year model 9-13, as they have bigger exhaust camshaf, the 14+ its smaller
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post #7 of 69 (permalink) Old 01-09-2017, 05:45 PM
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No he has a 2007 480 carb bike. We both have big cams in our YFZ"s (MMAD Lightspeeds)
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post #8 of 69 (permalink) Old 01-09-2017, 11:42 PM Thread Starter
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No he has a 2007 480 carb bike. We both have big cams in our YFZ"s (MMAD Lightspeeds)
that's good to know it makes 1hp more on 480 yfz's, I bet it will make also on r, but still depends which r is it.

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post #9 of 69 (permalink) Old 01-10-2017, 11:16 AM
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Mine also a 480 and it did not make more HP. Both Carb bikes



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post #10 of 69 (permalink) Old 01-10-2017, 02:29 PM Thread Starter
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Mine also a 480 and it did not make more HP. Both Carb bikes
right, i was talking to someone right now and he told me foam filters seems to be better than 8 ply filter, because 8 ply filter even with outwear on them, the real small sand can go through them.
not sure if it's true or not.

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post #11 of 69 (permalink) Old 01-10-2017, 02:47 PM
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Mine also a 480 and it did not make more HP. Both Carb bikes
right, i was talking to someone right now and he told me foam filters seems to be better than 8 ply filter, because 8 ply filter even with outwear on them, the real small sand can go through them.
not sure if it's true or not.
Technically it can happen. That's why you put something like Maxxima Fab1 cloth filter oil on it. If sand does get past the outerwear and cloth filter part, the oil will stop it.[ThumbsUp]
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post #12 of 69 (permalink) Old 01-10-2017, 02:50 PM Thread Starter
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Technically it can happen. That's why you put something like Maxxima Fab1 cloth filter oil on it. If sand does get past the outerwear and cloth filter part, the oil will stop it.[ThumbsUp]
the new ones they have the oil on them, the red color i guess, i service mine with k&n recharger kit for filters.

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post #13 of 69 (permalink) Old 01-10-2017, 03:51 PM
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I think it would be very hard to get a piece of sand through the OuterWear micro mesh? Does this happen often with sand?


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post #14 of 69 (permalink) Old 01-10-2017, 03:59 PM
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Technically it can happen. That's why you put something like Maxxima Fab1 cloth filter oil on it. If sand does get past the outerwear and cloth filter part, the oil will stop it.[ThumbsUp]
the new ones they have the oil on them, the red color i guess, i service mine with k&n recharger kit for filters.
There might be a little oil, but in my professional opinion, I'd put Fab1 or the K&N SprayFilter Oil on them. Working in Phoenix,AZ I saw a lot of sand.[ThumbsUp]
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post #15 of 69 (permalink) Old 01-10-2017, 04:08 PM
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Paper filters are garbage.
That's no secret. K&N FCI AEM what ever.
All paper filters let dust through.
If you are serious about dist and sand and dirt you get a foam filter

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post #16 of 69 (permalink) Old 01-10-2017, 04:09 PM
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There might be a little oil, but in my professional opinion, I'd put Fab1 or the K&N SprayFilter Oil on them. Working in Phoenix,AZ I saw a lot of sand.[ThumbsUp]
You risk over oiling the filter. Might as well run a plastic bag over it

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post #17 of 69 (permalink) Old 01-10-2017, 04:18 PM Thread Starter
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Paper filters are garbage.
That's no secret. K&N FCI AEM what ever.
All paper filters let dust through.
If you are serious about dist and sand and dirt you get a foam filter

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yea that's true.

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post #18 of 69 (permalink) Old 01-10-2017, 04:35 PM
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Originally Posted by BobPeabody67 View Post
There might be a little oil, but in my professional opinion, I'd put Fab1 or the K&N SprayFilter Oil on them. Working in Phoenix,AZ I saw a lot of sand.[ThumbsUp]
You risk over oiling the filter. Might as well run a plastic bag over it

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By that logic, how is oiling a foam filter ANY different than oiling a paper filter? In fact, a foam filter unoiled has more restriction than a oiled K&N. Let alone a oiled foam filter.
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post #19 of 69 (permalink) Old 01-10-2017, 05:58 PM Thread Starter
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a K&N filter is not a paper filter , it is a cotton based cloth material, sandwitched between layers of wire mesh screen. (a side note, the wire mesh screen acts as a backfire screen preventing possible airbox fires- a function your foam filter does not do)
K&N Are washable so that is for sure they aint just paper.
I Must get more information on filters!
Btw, doesnt weinen use FCI intake and filter?

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post #20 of 69 (permalink) Old 01-10-2017, 06:09 PM
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I've been running an FCI and outerwear for 11 years on both '06's and never had sand get past them, all we run is sand now.
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