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stainless snorkel

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deralic22

Joined: Thu Apr 12, 2012 5:33 pm
Posts: 23
Vehicle: 1990 wt sierra

Posted: Fri Dec 21, 2012 8:08 am

Just want to know off those who have snorkels would 50mm ID stainless tube be to small for a snorkel?

Fatzook

az supporter

Joined: Sat Oct 27, 2007 11:30 pm
Posts: 14977
Location: The Hills
Vehicle: Vitara, NGV

Posted: Fri Dec 21, 2012 8:43 am

Thats a matter of opinion really. Personally, I'd be looking at 2.5" (63mm) atleast. I only use 3" (75mm) for snorkels.

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Gwagensteve

Joined: Thu Feb 26, 2009 10:30 pm
Posts: 12997
Location: Melbourne

Posted: Fri Dec 21, 2012 10:53 am

X2.

I think 2" might be a bit small - there's a fair length that will increase frictional loss, and 2" is hard to find a ram duct/precleaner for.

I only make snorkels in 3"

Steve.

sando

az supporter

Joined: Thu Jan 20, 2011 6:52 am
Posts: 198
Location: Ipswich
Vehicle: 1.6 SJ80

Posted: Fri Dec 21, 2012 3:50 pm

My snorkel is 3inch and looks a treat, has a 2.25inch tip as a 3inch inlet on a ram head will be way to big for a little sierra engine.

douglasgiersch

Joined: Thu Mar 15, 2012 4:40 pm
Posts: 283
Location: Lowesdale Southern NSW (Close to Albury)
Vehicle: 82 Sierra SWB soft top

Posted: Fri Dec 21, 2012 4:08 pm

Correct me if im wrong but you would want as close size to whatever the opening of the carby/intake as you chould?

Gwagensteve

Joined: Thu Feb 26, 2009 10:30 pm
Posts: 12997
Location: Melbourne

Posted: Fri Dec 21, 2012 5:48 pm

sando wrote:

My snorkel is 3inch and looks a treat, has a 2.25inch tip as a 3inch inlet on a ram head will be way to big for a little sierra engine.

Sorry? How do you figure that?

Steve.

sando

az supporter

Joined: Thu Jan 20, 2011 6:52 am
Posts: 198
Location: Ipswich
Vehicle: 1.6 SJ80

Posted: Fri Dec 21, 2012 5:53 pm

Steve just realised what I wrote, I ment pre-cleaner not ram head. When I looked at pre-cleaner sizes the ones with three inch inlet were to large for the amount of air the sierra could use.

Gwagensteve

Joined: Thu Feb 26, 2009 10:30 pm
Posts: 12997
Location: Melbourne

Posted: Sat Dec 22, 2012 6:51 am

Ah yes, that does make sense.

Steve.

deralic22

Joined: Thu Apr 12, 2012 5:33 pm
Posts: 23
Vehicle: 1990 wt sierra

Posted: Sat Dec 22, 2012 3:41 pm

ok thanks thought it might of been bit small its just i have a heap of it at work looks like ill have to buy some

luke3411

az supporter

Joined: Mon Aug 29, 2011 3:25 pm
Posts: 183
Location: Katherine
Vehicle: Hard Top Fusty Ducker Vitara

Posted: Mon Dec 24, 2012 7:21 pm

douglasgiersch wrote:

Correct me if im wrong but you would want as close size to whatever the opening of the carby/intake as you chould?

I would like to know also

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neofitou

Joined: Wed Mar 24, 2010 10:30 pm
Posts: 1088
Location: Melbourne
Vehicle: 00 Jimny, 63 Haffy

Posted: Mon Dec 24, 2012 8:06 pm

Its due to the extra surface resistance of the pipework itself over the length of the longer pipe adding up, its more significant than you would guess,
I remeber doing the math in high school physics, but I would have to google it nowadays.

neofitou

Joined: Wed Mar 24, 2010 10:30 pm
Posts: 1088
Location: Melbourne
Vehicle: 00 Jimny, 63 Haffy

Posted: Mon Dec 24, 2012 8:14 pm

http://www.pipeflowcalculations.com/pressuredrop/
Pressure drop is calculated for known flow rate, pipe diameter, pipe length, fluid density and viscosity.
For flow rate calculation, pressure on the start and on the end of pipe is required, as well as pipe diameter, pipe length, fluid density and viscosity.
Pressure drop in pipe calculation is based on the Darcy-Weisbach equation for head loss due to friction in closed round or rectangle pipe.

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