mach9
TY 4 Stroke Master
We ran my nytro on the dyno.
Basically air straight into the horns with no restrictions.
That is when it posted highest gains, (of course).
Heck I've even considered getting these little pre-filter booties.
http://www.outerwearsracing.com/proddetail.asp?prod=202452
And that would be it. (snow dust)
What more would you need?
Cheap mod too.
But I did the air box mod instead.
Basically air straight into the horns with no restrictions.
That is when it posted highest gains, (of course).
Heck I've even considered getting these little pre-filter booties.
http://www.outerwearsracing.com/proddetail.asp?prod=202452
And that would be it. (snow dust)
What more would you need?
Cheap mod too.
But I did the air box mod instead.
shadow44
TY 4 Stroke God
Those look cool! I wonder how restrictive they are?
Nikolai
TY 4 Stroke God
I made a bracket that uses 1 zip tie(and holds it in place) and the filters are rock solid. As for a fuel controller, the lean pop I had before installing the filters got a lot worse after the install which tells me there's a noticeable HP gain. PCV solved this and made the sled run way stronger. I'd actually go as far as to say the sled was unrideable without the fuel controller, but I also have a header and can which contributed to the lean pop.
I've posted these before, here's a couple pics of the bracket I made. Just some scrap aluminum, a few minutes with the welder, and a coupler spacers. Pretty simple.
I've posted these before, here's a couple pics of the bracket I made. Just some scrap aluminum, a few minutes with the welder, and a coupler spacers. Pretty simple.
loudelectronics
TY 4 Stroke Guru
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shaddow44 said:
They are just outerwear material. Not restrictive at all. They are also almost waterproof. You can put them under the tap and no water goes through. I have something similar on my grizzly snorkels. I can completely dunk my machine and no water enters the air box or clutches. They work good and keep my KN filter clean.
woolyviper
TY 4 Stroke Master
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- Snowmobile
- 2009 Yamaha Phazer RTX
i wonder how the mods missed the ebay link in this post?
loudelectronics
TY 4 Stroke Guru
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woolyviper said:
Nobody likes a taddle tail.
09nytro
TY 4 Stroke God
What air box mod did you domach9 said:
stephenpen
Expert
How come no one puts the filters right on the throttle bodies.
mach9
TY 4 Stroke Master
stephenpen said:
The velocity stacks or "horns" are designed to increase the air flow via venturi effect. Yamaha designs them for a specific number set.
It is suppose to be the perfect length, shape size and cone for the HP / Tourqe curve they want to match to the stock air box and stock exhuast. Also keeping within certain sound levels.
The new Apex had the horns modified longer this year for more HP but most of that was changes due to the EXUP.
Different style horns for the Nytro will not easy to develop, but that is where new power can be found.
If only we had bigger throttle bodies, then you would see some real numbers.
mach9
TY 4 Stroke Master
shaddow44 said:
Hard to say what they would do exactly.
Someone would need to test them proper to know.
Reasons why I didn't do it...
The 3" ones you can get are a little small and sucking one in cause I couldn't get good fit would... "suck".
But maybe someone else can find a good way to mount pre-filter on a horn.
I'm also not exactly sure of what they would do for throttle response etc.
As an air box has reasons to exisit. Mostly for smoothing out the air pulsing.
So I feel better off with most of my air box intact.
