Jump to content
HybridZ

proxlamus©

Members
 View Profile  See their activity

  • Posts

    2145

  • Joined

  • Last visited

  • Days Won

    1

 Content Type 

Posts posted by proxlamus©

    Saw an EVO with the VG's and the Roof Vane today..

    in Windtunnel Test Results and Analysis

    Posted

    as the air comes off the back of the roof, it tries to go straight.but it will also follow the body line if it slopes, as it does in the s30. so what ends up happening is it pulls up on the rear of the car unloading the tires. a spoiler counteracts that affect by redirecting the air back upward, thus pushing down on the car. the vg's on the otherhand (also known as turbulator strips) break up the air as it leaves the flat part of the roof, brealing this "suction" and making a even higher drag spoiler less/unnessicary. this is why cars like the lotus europa and vega kammback wagon came about, to get rid of the slope for aerodynamic purposes. hope this helps!

     

    What? LoL

     

    I think you know what your talking about.. just can't word it properly..

     

    Vortex generators simply interfere with the boundary layer and create a turbulent airflow which "extends" that boundary layer. As long as the moving air "sticks" to the boundary layer, there will be no separation. The point of VG's is to delay the boundary separation.

     

    In order to maximize the efficiency, the VG's are mounted as far back on the roof line, at the highest point (if possible) to re-direct the airflow separation towards the spoiler.

     

    I dont believe VG's create lift.. just interference drag. As for the "roof vane" there is very very small induced lift (which unloads suspension not the tires). With induced lift comes drag.

    Am i crazy?! I want to get rid of the turbo!

    in Non Tech Board

    Posted

    This has been in my head for months now..

     

    But i kinda want to completly ditch the turbo setup... and build a High Compression N/A motor with some ITB's and a wicked cam and head work.

     

     

    Turbo's are a hoot.. although very simple.. its just more parts to fail or maintain.

     

    I used to dream of the sound of turbo's and make turbo noises w my mouth haha..

     

    and now i admire the sound of tripple carb or ITB setups and POWERFUL naturally aspirated motors

     

    someone straighten me out!!!

    GOOSE HORN coming from the engine.. WTF

    in Trouble Shooting / General Engine

    Posted

    alot of ya guys know.. im not mechanically inclined or stupid..

     

    but this has baffled me.

     

    I did a quick run of boost down the street and all of a sudden ive been hearing a loud loud sound similar to a goose call screaming from my engine.

     

    I checked the belts.. and the vacuum lines.. at idle its screaming.. when I rev the RPM's the sound increases and sounds like a balloon deflating (squeeling).. goes from loud to slowly "running out of air" the steady scream.

     

    I had a similar problem when I ran the valve cover breather and PCV to the intake after I did all my mods and turbo swap... only on DECEL.. i was thinking maybe it was the valve cover gasket. i just run them open now

     

    any idea's guys?!

    tig/plasma combo machine

    in Fabrication / Welding

    Posted

    K i spoke to my welding instructor..

     

    he said its a good unit.. cant weld alot of thick stuff.. like 1/4" is about max with steel or aluminum.. he recommended multiple passes for 1/4" or anything thicker. Bevels rock.

     

    For the money though.. you can probably find a used Miller on craigslist with low hours. Plus I dont know if this unit has a cooling unit to cool the tungsten.. those puppies can produce an arc 20 times hotter than the surface of the sun.

    tig/plasma combo machine

    in Fabrication / Welding

    Posted

    ive been welding up my intake manifold using a Miller TIG at school..

     

    for thin aluminum I am using 70amps.. and about 60hz.. for thicker material and welding the thick flange to thin piping, I am using about 120hz.

     

    Lower frequency is a bigger puddle... less penetration

    Higher frequency is a narrow puddle with deep penetration.

    Greater amperage is obviously more heat

     

    you really shouldnt need anymore than 150amps and 200hz for everyday aluminum.

     

     

    FYI - you can weld aluminum with a MIG... comes out fairly well too

    Closest race ive ever had

    in Non Tech Board

    Posted

    Me.. Datsun 280z versus a Datsun 510.

     

    sounds like a no brainer?!

     

    That damn 510 had a turbo KA24DE.. which sounded wicked as hell.. and damn that puppy must of been light.. it was unbelievable.

     

     

    anyway.. dead even race.. i mean DEAD. only one pull from a .. umm.. christmas tree. ughm

    Is anyone here an engineer?

    in Non Tech Board

    Posted

    Globerunner.. i am fascinated with AE...

     

    but id rather be flying an F22 then sitting at a desk with a big headache trying to redesign a part.

     

    Plus I make a butt load of money.. for sitting on my ass and letting auto pilot take control.. while touring the world and meeting hot flight attendants.

×
×
  • Create New...