Home made bellmouth :)

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mik_str
Posts: 2149
Joined: Thu Apr 01, 2004 10:45 pm
Location: Montreal, Canada

Home made bellmouth :)

Post by mik_str »

Hi folks,

those who know me from this site know that I have a propensity to mod and try odd things. In doing research recently on the subject of airbox mods/air filters and the like, I ran across a post by a chap who noted that adding a bellmouth to a straight tube increases airflow significantly (seem to recall 30%). In fact, on need only look at aftermarket velocity stacks (such as the billet HPower stacks for the VTR, designed on a flowbench) to see that they virtually all make use of this feature to improve airflow. Anyone who has looked at the stock velocity stacks (a.k.a. intake runners, trumpets,...) know they make a half-ass attempt at best in this regard. As I wait on something promising, my mind has been racing thinking about how to add a true bellmouth to my OEM runners but I came up with nothing of any value. That is, until I played with my 9 month-old daughter this morning.... You see, she has some hard (hollow) plastic rings (stack up on a tapered post, a kids toy)...it was a Eureka moment!!!!! My thoughts are that I will sacrifice one of her rings (already did a quick size test with a spare short runner I have sitting on a shelf, will be good to go), slice it in two and fasten it to the upper end of the runner, thereby creating a true bellmouth. I will glue it on so I can remove it later (or cut it off). It may not yield any improvement but, then again, it may

Will keep you folks posted

P.S. he he
99 VTR1000F Firestorm, a.k.a. The Carbon Express
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kevg
Posts: 1361
Joined: Mon Dec 09, 2002 5:38 pm
Location: Ex-Paisley, Aberdeenshire now.

Re: Home made bellmouth :)

Post by kevg »

i hope your gonna buy your kid some new toys if it works, :lol:
cheerz

kev
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Stratman
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Re: Home made bellmouth :)

Post by Stratman »

Be interesting to hear the outcome
Two bikes, still only four cylinders!

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sirch345
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Posts: 22400
Joined: Mon Aug 25, 2003 10:35 pm
Location: The West Country.

Re: Home made bellmouth :)

Post by sirch345 »

I agree with Kev, what's are things coming too when you are stealing your kids toys for your bike :lol:

Seriously though Micky I like your way of thinking :!: Make sure you remember to get back with the outcome :D

Chris.
mik_str
Posts: 2149
Joined: Thu Apr 01, 2004 10:45 pm
Location: Montreal, Canada

Re: Home made bellmouth :)

Post by mik_str »

I am sure my daughter won't miss the one plastic ring. Besides, I am sure she wants Daddy to be happy, not to mention push back the boundaries of knowledge. AS they say, to make an omelette, you have to break a few eggs, lol
99 VTR1000F Firestorm, a.k.a. The Carbon Express
tony.mon
Posts: 16291
Joined: Wed Jul 25, 2007 10:46 pm
Location: Norf Kent

Re: Home made bellmouth :)

Post by tony.mon »

sirch345 wrote:I agree with Kev, what's are things coming too when you are stealing your kids toys for your bike :lol:

Chris.
Yeah, but when they get older they'll be stealing your bike to play with :eek2



HIDE THE KEYS!!!
It's not falling off, it's an upgrade opportunity.
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