Kwik mod damage turbo?
Post Fiend
Joined: Feb 2007
Posts: 14,541
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From: Dallas-Ft. Worth
Originally Posted by ernesteugene
///SNIP///
This pic is with the new early 99 wheel installed Click for full size image , which is the same wheel everyone calls the WW, and you can see why it causes a whistle on our intake side. See if you can find a pic of a 6.0L compressor wheel to compare with a WW.
This pic is with the new early 99 wheel installed Click for full size image , which is the same wheel everyone calls the WW, and you can see why it causes a whistle on our intake side. See if you can find a pic of a 6.0L compressor wheel to compare with a WW.
Joe
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FWIW once upon a time I worked the flight line as a USAF Crew Chief on C-141's, but crossed trained about 10 years ago, but anyway.... When we would do engine runs in the rain or on high humidity days we would get multiple little vortexes’ appearing around the intake of the engines. They looked like mini tornados dancing around appearing and disappearing over and over again. I can’t say it had any effect on the engine performance during these maintenance runs. Yes, jet engines are not truck turbos, but the vortex effect caused by high RPM compressors may not be all that unusual. Some pics I found on the net:
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fficeffice" /><o></o> FWIW once upon a time I worked the flight line as a USAF Crew Chief on C-141's, but crossed trained about 10 years ago, but anyway.... When we would do engine runs in the rain or on high humidity days we would get multiple little vortexes’ appearing around the intake of the engines. They looked like mini tornados dancing around appearing and disappearing over and over again. I can’t say it had any effect on the engine performance during these maintenance runs. Yes, jet engines are not truck turbos, but the vortex effect caused by high RPM compressors may not be all that unusual. Some pics I found on the net:
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Post Fiend
Joined: Feb 2007
Posts: 14,541
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From: Dallas-Ft. Worth
Holy Cow!! Not at all what I pictured happening!! I think everyone is envisioning the entire diameter of the turbo intake creating the vortex. That is just freakin' something else! I wonder what that effect would look like with a relatively long intake tube attached?
Either way, you've shown me something new!! I'm a communications technician, so my flightline time is very limited. Thanks!!
Either way, you've shown me something new!! I'm a communications technician, so my flightline time is very limited. Thanks!!
Last edited by Izzy351; Jul 28, 2007 at 04:19 PM.
More Turbo
Joined: Nov 2005
Posts: 532
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From: Punta Gorda, Florida
Most people would think they would form from the center. The reason why they don't is because it’s the air passing over the blade tips that creates the cyclonic effect and not the “fan” itself. This is where the air is the most turbulent. Jet engines usually have sharp points at their blade tips and a lot higher rpms hence the effect is much more dramatic. The compressor wheels in are trucks are designed much differently. They make the movement of air slower than a jet engine, but much less turbulent. As I posted before the intake tubes in our trucks have bellows and turns. These have a smoothing effect on the air not allowing vortexes of doom to form. This is not my hypothesis, but something I learned my first year in college basic science class while just touching on fluid dynamics. When the air passes over the bellows they create areas of low pressure thus causing the air to circulate around inside the bellows. These designs are not Ford’s as its long been general knowledge with turbocharged engines
Sorry you just won't see cyclones emanating from the front of a Powerstroke sucking up pedestrians anytime soon.
Sorry you just won't see cyclones emanating from the front of a Powerstroke sucking up pedestrians anytime soon.
Last edited by Batgeek; Jul 28, 2007 at 05:40 PM.
Post Fiend
Joined: Feb 2007
Posts: 14,541
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From: Dallas-Ft. Worth
Originally Posted by Batgeek
///SNIP///
Sorry you just won't see cyclones emanating from the front of a Powerstroke sucking up pedestrians anytime soon.
Sorry you just won't see cyclones emanating from the front of a Powerstroke sucking up pedestrians anytime soon.
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Originally Posted by Izzy351
Holy Cow!! Not at all what I pictured happening!! I think everyone is envisioning the entire diameter of the turbo intake creating the vortex. That is just freakin' something else! I wonder what that effect would look like with a relatively long intake tube attached?
Either way, you've shown me something new!! I'm a communications technician, so my flightline time is very limited. Thanks!!
Either way, you've shown me something new!! I'm a communications technician, so my flightline time is very limited. Thanks!!
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
I started out as a 304X7 which turned into 2E1X1, Satellite & Wideband Systems. I worked with CMOC when I was down at Tyndall AFB at the AOC down there coordinating maintenance on radar & radio sites. Fun stuff....
Dan --> what would the bow be for exactly???
Dan --> what would the bow be for exactly???
Postmaster
Joined: Jun 2006
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From: Fulltime RVer
Originally Posted by Batgeek
The compressor wheels in are trucks are designed much differently. They make the movement of air slower than a jet engine, but much less turbulent. Sorry you just won't see cyclones emanating from the front of a Powerstroke sucking up pedestrians anytime soon.
Jets certainly move a much larger CFM, but I'm pretty sure our small truck compressor has a higher flow velocity, because AFV=Air Flow Velocity, ft/min=fpm is given by AFV=CFM/CSA, where CSA=Cross Section Area, ft2=sf, and our CSA is very very much smaller than for a jet. My WiFi is acting up, and I can't find CFM or the intake diameter for a jet, but one needs to compare the CFM #'s (500-750 CFM for a PSD) and the CSA #'s to get the answer.
Rolls-Royce Performance Thrust:
120 lbf (0.5 kN) at 6,000 rpm at idle.
2,000 lbf (8.9 kN) at 16,500 rpm for takeoff
1,550 lbf (6.9 kN) at 15,000 rpm for cruise
Postmaster
Joined: Apr 2004
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From: Ellensburg, Washington
Erenest dont take this the wrong way but you remind me of Bill Nye the Science Guy. You can be interesting sometimes and other times I have to wonder if you have been playin with the rubber cement again in the basement with the doors and windows closed, lol.
Cowboy Steve
Cowboy Steve
Postmaster
Joined: Jun 2006
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From: Fulltime RVer
Originally Posted by powerstroked162
Erenest dont take this the wrong way but you remind me of Bill Nye the Science Guy. You can be interesting sometimes and other times I have to wonder if you have been playin with the rubber cement again in the basement with the doors and windows closed, lol. Cowboy Steve
Fleet Owner
Joined: Jun 2004
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From: Rio Rico, AZ.
Originally Posted by Izzy351
Dan --> what would the bow be for exactly???
Makes me want to go buy a set of TAGs.