Louvers for cooling

[Chaz]

Heck yeah Brian, give that a try! I am also thinking about that. Actually, I was going to get a little more trick and have it to be able to come out when rollin down the highway. (just for fun!) It would be like those cute little spoilers on Porsches!! LOLOLOLOL   

    Chaz
 

[DrivingMissLazy]

A couple of years ago Gene Rochester from down in SC did this type of experiment and posted the results. Probably on the BNO board, but I really do not recall. He had an Eagle and the results, as I recall, was that the yarn was sticking straight out from the side of the bus at speeds of 30 or more. He indicated that the position of the yarn indicated a low pressure area along the side of the bus and that louvers would not be of any help. Several others agreed with him.  The angle iron in front of the air intake was to break up the air stream and the negative pressure area. FWIW
Richard

[David Anderson]

I remember Gene's experiment, Richard.  The result was as you said.

Chaz, I kicked around this concept of lovers on my Eagle and I saw a couple of MCI's at Bussin USA in 2005 that had the setup.  As several of us stood around and looked at the louvers and all agreed they did look cool on the coach.  One guy said, "it won't work. Think about it.  When you need the ram air cooling the most is when you're climbing the hill at 30mph, not at 70 on the flat.  Insufficient flow will come through at those slow speeds, so why do it?"

None of us could disagree with that statement, so the conclusion was:  louvers won't help your overheating problem.   Just an opinion.  Hope your attempt works.  Good luck.

David

[Chaz]

Ok, well, looks like another idea down the black water tank!!   
That is why this site is so cool. Most ideas aren't new and it's nice to be able to find people who have attempted things like this so as not to waste time repeating. OR find out their results and elaborate on them. I love to create and experiment, but I HATE to waste time I don't have. 
As a matter of fact,  I spend most of my waking hours working on my art, etc. to try to make a living. But unfortunately, here lately, I just don't seem to have enough time.    Something may have to give, I'm hoping it isn't going to be the bus. (but I did offer it to a guy)
  Either way, I'm always thinking about new and better ideas. I just can't help myself.    It could be to a fault.

   Thanx for all the insight guys!
      Back to work,
         Chaz

[TomC]

I'm going to get one vertical scoop, but put it in the middle of the grill since it will bring the air in in front of the scoop and create a vacuum behind that will curve the air in also.  With the turbo on my engine, the only time the bus slows down is on a 5% grade or more.  I pulled Cajon at 42 mph the other day, and pulled Grapevine at 40 mph until it started heating when I slowed and dropped to 1st and pulled it at 32 mph-it was about 102 degrees.  With the turbo, most of the hills have disappeared, but that involves using power, and heat rejection.
I'll say it again-if any of you are contemplating replacing your 8V-71N with a 6V-92TA, DON'T!!  Rebuild your 8V-71 into a turbo/aftercooled engine and you can get 400hp and 1200lb/ft torque easily and reliably from it with 80 injectors (more than I'd want to try to get from the 6V-92TA)-was a Detroit factory power setting.  Good Luck, TomC

[Chaz]

Tom,
  What sort of mileage difference has there been?

  Also, definitely post how that scoop works.

   Thanx,
     Chaz

[Gary LaBombard]

Russ and any or you others with more experience, what do you think of my idea on this also.  I plan to have a vertical vent facing the front of the bus but located in the center of my radiator door that would extend 1 1/2" out from side of bus.  Then at the very end of the door nearest the back of bus put another vertical vent (scoop) facing forward that extends out 3" past the outside of vent door to radiator.  My idea (if legal) is for the first vent to pick up air closest to side of bus and to direct this air to the center of the radiator, then the escaping air past this 1 1/2" distance to be caught by the back end vent (scoop) to continue to pull in more air for the radiator cooling.

This cannot be tested by me for some time as you all know but I think it will be dividing up the inlet air to the radiator that can be directed to two areas of the radiator (center / back) at one time, I hope. 

Let me know what you think and if you think this would be legal from outside of bus?
Gary

[TomC]

I've gone from 5.4 to 6.24 or about 15% better (without car and cruising at about 62).  I wouldn't even care if the mileage stayed the same since the performance is sooo much better, and doesn't smoke going over the grapevine.  Good Luck, TomC

[Chaz]

I was thinking it would be better, but didn't know for sure.
  Thanx Tom.
     Chaz