Well well well!


If I remember my fluid mechanics, turbulent flows, especially when transitioning from laminar to turbulent, produce less drag. Moreover, you don't get the large boundary layer that influences the flow field downstream (like, as you enter the runners...). So here, the purpose would presumably be to enable more air to flow AND to provide a more uniform flow field on entry to the runners....


At least that is what I can recall; my expertise is solid mechanics, not fluids, so I am recollecting from my undergrad days of (long) ago. Perhaps a knowledgeable thermal/fluids guy will chime in.


I remember Bywater saying that they had to some *something* to the internal structure of their monster plenum setup, pix of which are elsewhere on this thread. I always guessed it was the addition of internal vanes to guide the flows to ensure better internal distribution. But maybe, just maybe, the AJ6 guys did this texturizing thing, and did not do internal vanes at all...


I had not seen this patterning/texturing in the pix until you pointed it out....


Hmmmm! Sly grin indeed! Cats and canaries.


-M

 

Mike, I'd say that you know a lot more about such things than I ever will.

You already know my philosophy:

"Painting it red should give it at least 50 more horsepower"

 

mike the textured pattern has been explored with the hot rod guys for 15-20yrs. the use of CNC made it easily posssible.

before that it,porting,done by abrasive machining, called Extrude honing(thats what has been done to my intakes/plenums.

abrasive machining was explored by F1 engines,early 80s-into the 90s.

have no idea what they use today, secretive about there stuff, we americans love to brag about our new race stuff, so everybody knows whats ,what.

 

Yes Jagzilla and Ronbros, those do look like the old AJ6 long ram intakes for sure. According to Bywater if I remember correctly, they added 80hp to the 5.3. Having a true near 400hp from that engine would not be shabby. Actually that would be a good number on the street. Jagzilla, how well do those AJ6 modified intakes work? I'm playing with a 6.0L that is stock right now and am going to use a Richmond ROD behind it myself. Along with a 3.54 early rear end. Just need to find some better brakes for it than the old Dunlops. Unless I take and put the XKE front calipers on the rear which would give me more braking power. Right now I need to find a bell housing and perhaps change my steel flywheel for an Aluminum one. I have though about crafting my own long tube intake but don't have the time right now. Love the pics'

 

Sorry. I really couldn't say how well the AJ6 Plus Torque package performs over the stock intakes and TBs, because, I didn't simply replace the stock units with them. They were already installed on The Gran Turismo Jaguar motor that I installed in place of my stock motor. With all the modifications to that motor, plus, the Richmond ROD, it would be impossible to pinpoint the improvements of just the intakes & TBs.