| Author | Message | ||
| Greg Roberts (Eagle 20) (Gregeagle20)
Registered Member Username: Gregeagle20 Post Number: 268 Registered: 4-2002 Posted From: 66.18.167.76 Rating: N/A |
For those interested I have uploaded some new pictures to my photo bucket website (link below). The new photos are of my new front bumper with new lower air dam and also the radiator scoop that I just fabricated and installed. I also just fabricated and installed a new evap cool system for the radiator as well but no pictures of that yet. Enjoy! http://photobucket.com/GregRobertsEagle20 | ||
| Paul Lawry (Dreamscape)
Registered Member Username: Dreamscape Post Number: 565 Registered: 5-2007 Posted From: 64.40.215.248  Rating: N/A |
That looks great Greg! Have you had a chance to try it out and see what kind of temps you are getting? Paul | ||
| Don Evans (Doninwa)
Registered Member Username: Doninwa Post Number: 225 Registered: 1-2007 Posted From: 208.81.157.90  Rating: N/A |
My old bus is a much different setup but the scoop on it is only along the rear edge, way less than 25%. Just enough to create a higher pressure area in front of the radiator. Your opening looks a little small for anything but highway speeds. Pulling a steep hill at low speed you may not get the flow you need. Hope it cools the way you want. Great pix and a killer rig. Nice work! Good luck Don 4107 | ||
| Greg Roberts (Eagle 20) (Gregeagle20)
Registered Member Username: Gregeagle20 Post Number: 269 Registered: 4-2002 Posted From: 66.18.167.76 Rating: N/A |
Paul, I hope to try it on Sunday at a nearby pass to see how she does. I am particularly curious how well it does at the critical lower speeds at the top of the hardest climbs and without the evap cooling system on. Soon I will know! | ||
| Greg Roberts (Eagle 20) (Gregeagle20)
Registered Member Username: Gregeagle20 Post Number: 270 Registered: 4-2002 Posted From: 66.18.167.76 Rating: N/A |
Don, Yes, I may end up shortening mine some or adding some slats. Not sure which way I will go yet. Thanks for the input. | ||
| RJ Long (Rjlong)
Registered Member Username: Rjlong Post Number: 1596 Registered: 12-2000 Posted From: 67.182.53.218  Rating: N/A |
Greg - Eagles were not known for having overheating and cooling issues - they're much more like an GMC in that regard compared to an MCI. Unless, of course, you've installed a hot rod motor in the tail and didn't upgrade the cooling system. IMHO, you've drastically reduced the overall intake area for the radiator, so I think you're going to find you'll have MORE cooling problems - especially at the lower speeds encountered when pulling hills in 2nd or 3rd. My suggestion: Make the run up the hill WITHOUT the scoop first, then try it again with it installed and see if there's any difference. Be sure to monitor the temp gauge VERY, VERY closely - you don't want to fry your engine. FWIW & HTH. . .  | ||
| Buswarrior (Buswarrior)
Registered Member Username: Buswarrior Post Number: 1676 Registered: 12-2000 Posted From: 76.68.121.41  Rating: N/A |
I think RJ's strategy is a good one. Run the hill a few times, scoop on, scoop off. Don't get me wrong, I'm a big fan of experimenting, so take my comments as helpful thoughts, not criticism!!!! I'm no aerodynamic engineer, but I think you might be a little small in your cross section to get enough air in through there. On the idle, there must be a wind in there. Get someone to put the throttle to the governor and check the suction there, or the wind output on the other side of the fan, have an assistant remove the shroud, see if there's a change? There are limits to the amount of air you can jam through a space of certain cross section, just so long as you haven't broached them. I'm wondering if you back up the scoop mouth a few inches, so that some of the rad screen is exposed, you might see some fantastic changes in your air flow under all conditions. I suspect under slow vehicle speed/high fan speed climbing conditions, it may starve the rad for air? let us know how you make out!!! happy coaching! buswarrior | ||
| clint hunter (Truthhunter)
Registered Member Username: Truthhunter Post Number: 429 Registered: 1-2009 Posted From: 24.129.232.232  Rating: N/A |
on my MC 8 the aftermarket cooling scoops are just over the last 8 % ( located at the rear edge) of the radiators. the gradual radius is 3" open at the mouth (which brings the width to the maxium allowed 8'6" ), of course that is about 3 feet higher and a different shaped body than your eagle; so can you compare apples to oranges and how the water flows around them at a given velocity ? ...Try, measure & compare with full accounting for anything not equal (wind , ambient temperature, rpm & throttle degree, etc!... >Can't comment on the difference the scoops made as the coach came to me that way; + scoop's were commonly added by many, I understand often when converting the coaches to automatic transmission from the original factory standard transmission. | ||
| Luvrbus (Luvrbus)
Registered Member Username: Luvrbus Post Number: 757 Registered: 8-2006 Posted From: 74.33.54.207 Rating: N/A |
Greg,one thing I found out over the years with Eagles they don't like air dams on the front, a scoop or a full width mud flap on the back. I would check the hyd fan as with age they lose rpms on the fan nice setup when in good working order. With your NJT 20 they have a very large cooling system to start with I think you have a fan problem .Hope all works out for you (Message edited by luvrbus on August 28, 2009) | ||
| Ron Walker (Prevost82)
Registered Member Username: Prevost82 Post Number: 396 Registered: 11-2003 Posted From: 208.181.210.47  Rating: N/A |
I have to agree with Buswarrior .... I think the intake X-section is way to small ... proof is in the pudding. | ||
| doug yes (Dougg)
Registered Member Username: Dougg Post Number: 96 Registered: 1-2007 Posted From: 174.131.122.226 Rating: N/A |
Where ever we went this summer the weather was cooler than last year. I did get to test our new evap. cooling on one hot day in the mountains. It took about 5 or more minutes to have an effect but took off 20 degrees. I used a patio mister set from Walmart zip tied to the intake grille (MCI 102DL3)and plumbed into the fresh water under the kitchen sink with a 24v. valve. | ||
| larry currier (Larryc)
Registered Member Username: Larryc Post Number: 266 Registered: 2-2007 Posted From: 205.188.116.203 Rating: N/A |
Greg, Well, don't worry about hurting it any. Mr. DDEC is always vigilant and will park you right away if it doesen't like what it's seeing. You can take that to the bank... It's one over sensitive SOB. My gauges read high sometimes but if I take the temp gun to the water rail, its always cold. I don't pay any attention to the gauges anymore, I just let Mr. DDEC run the show. My 20 runs very cool all the time. I left the calalytic converter on top of the engine, removed the muffler and insulated the exhaust pipes. I also replaced the water pump not long after I got the bus. I can pull a mountain pass now and walk up to the back doors and open them without burning my hands. I also upgraded my HP rating to a 350HP coach download. It's still not a real workhorse, but it is 100% more drivable. I think getting that huge muffler out from under the bus was the nicest thing I did for it. The muffler runs about 800 degrees and it was just to much radiant heat under the bus. The entire running gear really responded to throwing the muffler. The muffler almost touched the transmission and if I ran hard I would get a check trans light sometimes. The tranny temp dropped, along with everything else under the bus. I think it really took a load off the radiator. Removing the huge muffler is unnoticable from inside the bus unless I go through a tunnel or under an overpass, I cannot tell it is gone. Even then it is not very noticable, but it does sound powerful. From the size of the supply lines for the fan, I would guess that the biggest, restriction is likely the filter, so I change mine out regularily. I really like the way the 10 cap fits with the roof raise. It looks great. I don't expect that in this life time my 20 will ever be as nice as yours, but it's sure nice to have you for inspiration. Thanks, Larry | ||
| Wayne Ellenburg (Wlnburg)
Registered Member Username: Wlnburg Post Number: 68 Registered: 6-2008 Posted From: 173.24.219.217  Rating: N/A |
Greg Great looking front. If the scoop works I will need one similiar. Let us know. I have a question about front door stop. I need a door stop for mine. Were did you get your. Thanks |