Venturi effect ??????

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flatlander · #1 Post by **flatlander** » Sun Jul 08, 2012 8:13 am

Does this exist ? It came up in a pub bine club the other day and to be honest it's not something I am familiar with or really understand but was wondering if it exists and if so how if at all it would relate to our bikes?

My understanding and yes I was sober :) is that it is some physics thing to do with transfer of greater volumes as opposed to transfer of lesser volume more quickly? Like air and fuel under pressure for example ?

D-Rider · #2 Post by **D-Rider** » Sun Jul 08, 2012 10:48 am

Of course it does .... though your description's wrong.

Here's some info for you:

http://en.wikipedia.org/wiki/Venturi_effect

slickliner6 · #3 Post by **slickliner6** » Sun Jul 08, 2012 11:39 am

we use this a lot on offshore installations.
when a gas well had depleted we put in smaller tubing string which in turn encourages the venturi effect.(and yes .. it does work)

#4 Post by **Kwackerz** » Sun Jul 08, 2012 11:45 am

Carburettors rely on it

D-Rider · #5 Post by **D-Rider** » Sun Jul 08, 2012 12:08 pm

as do vacuum gauges

struv · #6 Post by **struv** » Sun Jul 08, 2012 12:54 pm

and spray guns

randomsquid · #7 Post by **randomsquid** » Sun Jul 08, 2012 3:28 pm

Wouldn't that make buggering about with the snorkels sort of pointless?

fatboy · #8 Post by **fatboy** » Sun Jul 08, 2012 6:15 pm

Venturi principal... any moving body creates a draught of air,
makes tons of every day shit work,simples when you think about it

Aladinsaneuk · #9 Post by **Aladinsaneuk** » Sun Jul 08, 2012 6:18 pm

So yes a smaller snorkel would probably be better performance wise

D-Rider · #10 Post by **D-Rider** » Sun Jul 08, 2012 7:39 pm

Aladinsaneuk wrote:So yes a smaller snorkel would probably be better performance wise

??????

flatlander · #11 Post by **flatlander** » Sun Jul 08, 2012 8:02 pm

A is that good for us bronzed Adonis type folks then ?

Squid squid we got something right !! Not only do they look better ....

randomsquid · #12 Post by **randomsquid** » Sun Jul 08, 2012 9:53 pm

Looks that way, later bike = whooshier air.
Glad I didn't go to the trouble of piddling about with mine now.

flatlander · #13 Post by **flatlander** » Mon Jul 09, 2012 10:38 pm

right so I have read the wiki article as best as I can understand it and as I understand the comments herein the stuff that always gets said about the black and red having bigger snorkels and therefore being faster would appear to not be correct... (I understood Squids summary better tan wiki) so as I have the potentially faster smaller snorkels is there an optimium size to which they should be shrunk or should I just be glad that I have the slimmer faster ones

D-Rider · #14 Post by **D-Rider** » Mon Jul 09, 2012 10:55 pm

flatlander wrote:right so I have read the wiki article as best as I can understand it and as I understand the comments herein the stuff that always gets said about the black and red having bigger snorkels and therefore being faster would appear to not be correct... (I understood Squids summary better tan wiki) so as I have the potentially faster smaller snorkels is there an optimium size to which they should be shrunk or should I just be glad that I have the slimmer faster ones

It's not in the least bit relevant to the snorkels - just as there is no evidence that the the snorkel design of the earlier bikes is better than the later bikes.

#15 Post by **Kwackerz** » Mon Jul 09, 2012 11:15 pm

http://www.bikeboy.org/aprillia03rsvr.html

Rene used to play with the trumpets too with an effect on power delivery.. better maybe not, but trumpet height will alter things

or are you on about your inlets from the front of the bike? in which case RiOT ran witty's bike with big fk off bits of rubber inlet hose probably 60mm diameter, which also worked to improve things

Looks that way, later bike = whooshier air.

That, is a classic..