Yamaha Star V-Max Forum :: Topic: Dirty Filter Secrets (1/1)

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TOPIC: Dirty Filter Secrets

Dirty Filter Secrets 3 years 2 months ago #1

As promised here is the link to the filter K&N filter writeup. Don't waste your money of fake K&N filter knockoffs, when you can get the real deal for less.

www.starvmax.com/news/1-v-max-news/182-2...dirty-filter-secrets

Here is last years filter test with the x-pipe: www.starvmax.com/blog/from-the-dyno-room...ter-comparisons.html

Here is the favorite one:

Here is a common option sold for 60-70 (blue knockoff not this original form K&N) at other places:

And this is the most widely found option:

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Re:Dirty Filter Secrets 3 years 2 months ago #2

I know im not the only one that finds it funny that a car air filter fits our bike. Nice find FX.	fastestcb OFFLINE Senior Max Posts: 304 Thank you received: 2
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Re:Dirty Filter Secrets 3 years 2 months ago #3

I must have missed something ... is this K&N CM 9908 fit s the Vmax???	MariusMaximus OFFLINE Senior Max Posts: 378 Thank you received: 15
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Re:Dirty Filter Secrets 3 years 2 months ago #4

MariusMaximus wrote: I must have missed something ... is this K&N CM 9908 fit s the Vmax??? Yes it does. See the article and the photo gallery.	fxstein OFFLINE Moderator Time to Ride! This is VMax! Posts: 6323 Thank you received: 432
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Re:Dirty Filter Secrets 3 years 2 months ago #5

Here is a link to last years filter comparison on the X-pipe. We tested the 33-2758 against the stock air-filter on a 2009 VMax with X-Pipe: www.starvmax.com/blog/from-the-dyno-room...ter-comparisons.html	fxstein OFFLINE Moderator Time to Ride! This is VMax! Posts: 6323 Thank you received: 432
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Re:Dirty Filter Secrets 3 years 2 months ago #6

Just got done running all these filters on the dyno for several hours. Will have to work through piles of dyno charts. Long story short: The biggest gains from removing the restrictor. About 1 hps from the K&N vs the stock filter (does not matter what K&N). About 1 hps if you remove the rear top cover of the airbox - but only when you run the bike without the faux tank cover in place.	fxstein OFFLINE Moderator Time to Ride! This is VMax! Posts: 6323 Thank you received: 432
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Re:Dirty Filter Secrets 3 years 1 month ago #7

Oliver, How many hps are attributed due to removal of restrictors? Graebeler	graebeler OFFLINE Fresh Max Posts: 37 Thank you received: 4
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Re:Dirty Filter Secrets 3 years 1 month ago #8

graebeler wrote: Oliver, How many hps are attributed due to removal of restrictors? Graebeler Depends on the exhaust. Stock exhaust: ~2 rwhps Good exhaust (e.g. X-pipe or Arkapovic - most likely other new ones too): ~4 rwhps Hope this helps!	fxstein OFFLINE Moderator Time to Ride! This is VMax! Posts: 6323 Thank you received: 432
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Re:Dirty Filter Secrets 3 years 1 month ago #9

Good info. What is the Monster Big Air hp contribution when paired with the Akrapovic or Xpipe vs. running the Akrapovic or Xpipe with stock filter?	DrewMax NOW ONLINE Expert Max Posts: 722 Thank you received: 135
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Re:Dirty Filter Secrets 3 years 1 month ago #10

DrewMax wrote:

Good info. What is the Monster Big Air hp contribution when paired with the Akrapovic or Xpipe vs. running the Akrapovic or Xpipe with stock filter?

We did some very detailed runs all the way from stock filter and airbox to the Big Air with the X-Pipe last year:

www.starvmax.com/blog/from-the-dyno-room...ter-comparisons.html

Summary:

Stock bike: 172-173 (SAE) rwhps 111 ftlbs
X-Pipe with stock Airbox: 180 (SAE) rwhps 117 ftlbs
X-Pipe with stock Airbox - no funnel: 184 (SAE) rwhps 119 ftlbs
X-Pipe with open Airbox (no cover - no filter): 187(SAE) rwhps 120 ftlbs
X-Pipe with Monster Big Air (with K&N filters): 191-192 (SAE) rwhps 121 ftlbs

The Akrapovic moves the best numbers up by 3-4 rwhps.

That's about 12 rwhps over the stock airbox and about 8 rwhps over the airbox w/o restrictor.

Check out the various charts to see the difference in torque and power curves.