Mikuni BS34 Carburetors~Velocity Stacks?

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25 Jan 2024 18:31 #894424 by daveo
What might be the pros and cons of using velocity stacks with BS34 carburetors?







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25 Jan 2024 18:39 #894425 by Street Fighter LTD
Replied by Street Fighter LTD on topic Mikuni BS34 Carburetors~Velocity Stacks?
Unfiltered air is unhealthy for motor  
Oil dirtier faster 
scuffed cylinder walls
The only place for a motor without any filters is on a race track or Boat


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Mr Turbo Race Kit, MTC 1075 Turbo pistons by PitStop Performance , Falicon Ultra Lite Super Crank, APE everything. Les Holt @ PDM's Billet Goodies . Frame by Chuck Kurzawa @ Logghe Chassis . Deep sump 5qt oil pan. RIP Bill Hahn
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25 Jan 2024 22:53 - 25 Jan 2024 23:06 #894430 by daveo
Replied by daveo on topic Mikuni BS34 Carburetors~Velocity Stacks?

Unfiltered air is unhealthy for motor  
Oil dirtier faster 
scuffed cylinder walls
The only place for a motor without any filters is on a race track or Boat
 

I use RamAir MS-006 filters with stacks on my RS34's.  BS34's have identical center spacing measurements, though front-back they are longer.

photos.app.goo.gl/nrM19WHFqYd285R79






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Last edit: 25 Jan 2024 23:06 by daveo.

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26 Jan 2024 14:31 - 26 Jan 2024 15:28 #894478 by daveo
Replied by daveo on topic Mikuni BS34 Carburetors~Velocity Stacks?

Unfiltered air is unhealthy for motor  
Oil dirtier faster 
scuffed cylinder walls
The only place for a motor without any filters is on a race track or Boat





 

I use RamAir MS-006 filters with stacks on my RS34's.  BS34's have identical center spacing measurements, though front-back they are 10mm longer.

photos.app.goo.gl/nrM19WHFqYd285R79




 

The idea of using POD FILTERS with BS34 CV carbs is discouraged.
PODS can hinder proper CV carburetor function, and drive sane people crazy with wild jet chases...




Do VELOCITY STACKS minimize detrimental cross-wind effects associated with PODS, as they direct air flow straight into the carburetor opening?


MS-006 filters, Made in the UK



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Last edit: 26 Jan 2024 15:28 by daveo.

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26 Jan 2024 15:17 #894479 by Wookie58
Replied by Wookie58 on topic Mikuni BS34 Carburetors~Velocity Stacks?
You could always do something similar to the mods I have made to the stock airbox, this gives the extra flow without the downside of pods (K&N panel is for a 3.7ltr V6 Infinity) you would have more room to play with not having the monoshock

 
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26 Jan 2024 16:37 - 26 Jan 2024 16:38 #894480 by daveo
Replied by daveo on topic Mikuni BS34 Carburetors~Velocity Stacks?
WOW Wookie58, that is a masterpiece of craftsmanship and incredible idea...Dude! 

My air box appears somewhat stock too... 

It was gutted and the front was widened to fit the 3" long Mikuni trumpets (with filters) partly inside, in lieu of having to utilize rubber air box boots. 
Those boots were a restrictive pita when I needed access to the RS carbs.  They got increasingly stiff from age and constant internal exposure to ethanol in our fuel.  
Mikuni stacks will never become soft , and are easy to remove through the snorkel lid opening beneath the seat.

Like to see pics of your air box mounted in the frame.


 

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Last edit: 26 Jan 2024 16:38 by daveo.
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27 Jan 2024 00:56 #894484 by Wookie58
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27 Jan 2024 09:27 #894489 by daveo
Replied by daveo on topic Mikuni BS34 Carburetors~Velocity Stacks?
Wookie, your machine is like beautiful sculpture that naturally demands attention.


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