| Author | Message | ||
| Roger Baughman (Roger)
Registered Member Username: Roger Post Number: 223 Registered: 11-2006 Posted From: 71.136.32.69  Rating: N/A |
Hi All, I hade an idea about supplying cool air to my engine air cleaner. Theere is enough room in the rear corner behind the engine,oil type air cleaner, to install a small 110 volt house type air conditioner. I have a 1984 mci, 40FT. Any comments are welcome. Thanks | ||
| Brian Evans (Bevans6)
Registered Member Username: Bevans6 Post Number: 42 Registered: 5-2009 Posted From: 65.92.49.192 Rating: N/A |
My initial thoughts - your engine probably wants around 1,000 CFM of air flow capacity, if not more. The little air conditioner can probably put out 100 CFM at it's best. It will cool the incoming air around 20 degrees or so. At a 10 - 1 ratio of cooled air to outside temperature air, you may see a 2 to 3 degree drop in the aggregate temperature of the air. So I don't think this will work all that well. If you are turbo-charged, installing an intercooler (charge air cooler) between the turbo and the blower will help a lot. Brian | ||
| Ralph Peters (Ralph7)
Registered Member Username: Ralph7 Post Number: 194 Registered: 3-2004 Posted From: 75.206.124.72 Rating: N/A |
My Mc8 right rear engine door has a 17in. dim. hole with 3/4in crusher screen ,to keep hands out. During my converting the toilet water filler was removed an elongated and a house 5x11 floor vent was installed, also on the left side I installed the same size vent to the oil bath air creaner, which is now gone(oil bath air cleaner). At 8-71TA install mods were 1. air trans oil cooler (none on engine now), 2' 7in. opering on paper air cleaner and remount on right so direct air flow only one 90 elbo to turbo. Recently installed a less restrive muffler(it's loud), also removed top 1/2 of engine door and installed expanded metal. next is to remove stainless from left side door an install screen of some type. Bottom line, must controll right FOOT better and not be in a hurry, retired and NO need to get there in a hurry! In place of an AC unit install radiators in the line from the bottom of the rariators it was done by a bus nut. I was inforned by a mechanic who worked on yhe bus. I am looking for a radiator that will fit the left side, no oil bath air cleaner now. Problem $$$$$ !!!! These big toys are fun!! | ||
| Patrick levenson (Zubzub)
Registered Member Username: Zubzub Post Number: 290 Registered: 5-2007 Posted From: 174.91.218.163  Rating: N/A |
Are you going to use the alt to power the AC...would seem to be diminished returns if you did. Anyhow, misters would be where I would start if I wanted extra proven cooling | ||
| Luvrbus (Luvrbus)
Registered Member Username: Luvrbus Post Number: 1172 Registered: 8-2006 Posted From: 74.33.60.241 Rating: N/A |
Makes no difference on the temp on a N/A engine the blower will heat the air back to around 200 degrees only way is air to air cooler good luck | ||
| Roger Baughman (Roger)
Registered Member Username: Roger Post Number: 224 Registered: 11-2006 Posted From: 71.136.38.62 Rating: N/A |
Thanks for all of the info. Brian, how much cfm of refridgated air do you think would be of some value? If all was perfit in this world, we wouldn't be working to try to inprove these buses. It seems to me that some real cool air going right into the air cleaner would be of soom good. This is just to get he old tryired engine up a steep hill a little better. I am not trying to be a speetster. Thanks, everybody (Message edited by roger on July 04, 2011) (Message edited by roger on July 04, 2011) | ||
| Kyle Brandt (Kyle4501)
Registered Member Username: Kyle4501 Post Number: 623 Registered: 9-2004 Posted From: 71.12.88.184  Rating: N/A |
where is the power to run the AC unit comming from? | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 2097 Registered: 10-2003 Posted From: 71.58.71.157  Rating: N/A |
Propane, water injection,bigger injectors. These might be some things to check in to, and start the comments flying. | ||
| Roger Baughman (Roger)
Registered Member Username: Roger Post Number: 226 Registered: 11-2006 Posted From: 71.136.38.62 Rating: N/A |
I have a 4000 watt inverter pure sinewave. The 50D engine alternator will provide chage to the seperate bank of 4 D8 batteries that will be set up to run the roof air units. I thing there is enough power left over to run the small A/C unit. Thanks, | ||
| Matthew J Rutkowski (Matt_rutkowski)
Registered Member Username: Matt_rutkowski Post Number: 52 Registered: 1-2010 Posted From: 98.235.157.220 Rating: N/A |
In my mind rodger that would be like pissing on your driveway to melt the snow I really think it would be a huge waste of time! Just my 2 cents worth | ||
| George M. Todd (George_todd)
Registered Member Username: George_todd Post Number: 1254 Registered: 8-2006 Posted From: 99.37.28.23 Rating: N/A |
Matt, In my opinion, and knowing both of you, its worth at least a nickel. Brian Evans is right on, it won't work, and it won't leave a yellow spot in the driveway! G | ||
| Brian Evans (Bevans6)
Registered Member Username: Bevans6 Post Number: 43 Registered: 5-2009 Posted From: 65.92.49.192 Rating: N/A |
Rather than think of only one trick as a solution, what is your problem? Since non-turbocharged DD two-strokes heat the incoming air to around 200 degrees just by passing it through the blower, dropping the incoming charge air by a few degrees is not ever going to be a help. You mention you need to get your tired old engine up a steep hill better, so is the question you are overheating on the hill or you want more power on the hill? Each has a different solution, and slightly cooler intake air isn't the solution to either... Brian | ||
| Roger Baughman (Roger)
Registered Member Username: Roger Post Number: 227 Registered: 11-2006 Posted From: 71.136.38.62 Rating: N/A |
Thanks Guys, I certanily do not want to waist my time and money on somthing that will not work. The bus does not over heat on the hills, it is just very slow and I feel a little dangerious and it just might stop. Maybe it just needs an overhaul. I just will try to stay away from those situations it I can. Thanks Again everybody. Roger | ||
| Brian Evans (Bevans6)
Registered Member Username: Bevans6 Post Number: 44 Registered: 5-2009 Posted From: 65.92.49.192 Rating: N/A |
Are you downshifting as soon as you can to keep the rev's up as high as possible? I have a 4 speed manual trans, and I've spent 20 or 30 minutes in second gear going up some hills on I 26 in South Carolina, but I never worried about it. I was in a line of trucks in the right lane and we were all doing the same speed. | ||
| Jim Wilke (Jim Bob) (Pd41044039)
Registered Member Username: Pd41044039 Post Number: 647 Registered: 2-2001 Posted From: 184.0.13.120  Rating: N/A |
Yeah, that's how we go up big hills too. You have to start to downshift 5mph above the top speed in your next lower gear. If you get your shift right, the bus slows down a bit so you are at top RPM for the lower gear. If it won't hold that one, plan to downshift again. You want to take the hill at the top of what ever gear you are able to run in. It's very often 2nd for big hills. You won't hurt the engine climbing with wide open throttle, the engine is governed down. Brian, you are talking about Black Mountain just East of Asheville. It's a 7% grade for about 5 miles with NOWHERE to pull off. We blew a 1/8" air line on that hill & got pulled off just as the brakes applied. If you think those steep ones are scary, do one with your air buzzer going & no place to stop! | ||
| RJ Long (Rjlong)
Registered Member Username: Rjlong Post Number: 1825 Registered: 12-2000 Posted From: 71.195.124.20  Rating: N/A |
Roger - It always amuses me when I see a fellow RV busnut talk about climbing a grade faster in his toy. Sometimes it takes awhile before folk realize these are buses, not BMWs. Enjoy the ride, not the traffic! FWIW & HTH. . .  | ||
| R.C.Bishop (Chuckllb)
Registered Member Username: Chuckllb Post Number: 1548 Registered: 7-2006 Posted From: 97.225.73.174  Rating: N/A |
!!! RCB | ||
| L James Jones Jr (Jamo)
Registered Member Username: Jamo Post Number: 195 Registered: 11-2007 Posted From: 74.67.216.243  Rating: N/A |
One of my favorite lines from this board (and I've retold the story often) was a reply to someone asking about how they can safely get their 4104 up to highway speed while merging from an onramp. Who ever had the reply, please come forward. You said "I gave up acceleration when I bought my '04". Love that line... | ||
| marvin pack (Gomer)
Registered Member Username: Gomer Post Number: 1460 Registered: 3-2007 Posted From: 76.4.118.153  Rating: N/A |
Jamo and others LOL when you have a 04,getting it to speed is a little slow but don't get in the way once we get there LOL Gomer | ||
| Jim Wilke (Jim Bob) (Pd41044039)
Registered Member Username: Pd41044039 Post Number: 648 Registered: 2-2001 Posted From: 184.0.13.120 Rating: N/A |
What we 4104 owners need is a 400hp turbine or jet engine that we can kick in like a takeoff assist to climb hills. Install the "go" button under that hinged red switch guard. That way we wouldn't be tempted to run it all the time. It would also work on steep bridges and ON ramps. Kind of like Wile E. Coyote on his skateboard. | ||
| Roger Baughman (Roger)
Registered Member Username: Roger Post Number: 228 Registered: 11-2006 Posted From: 71.136.38.62 Rating: N/A |
My bus has an automatic. I just let the trany do the shifting. It was down shifting as needed to keep the RMMs up as far as it could. There was not one vehical stayed behind me. I was down to about 5 miles per hour. Iws on the grade going from Riverside Ca. to the northern part of the state toward Pishop. I am not very experienced at this hill driving in the bus or any large vehicle. So maybe you all are right about this. I am not trying to make a big deal out of this. Just thought a little coool air would help in a tight situation. Does anyone have a suggestion on the best way to get the engin xheck out to see if it is tuned to its capacity? It is an 8v71 without a turbo. Thanks again for all of your help, I really do appreicate it. | ||
| RJ Long (Rjlong)
Registered Member Username: Rjlong Post Number: 1826 Registered: 12-2000 Posted From: 71.195.124.20 Rating: N/A |
Roger - "My bus has an automatic. I just let the trany do the shifting. It was down shifting as needed to keep the RMMs up as far as it could." Therein lies a great deal of your problem. You'll get far better performance out of your powertrain in the mountains if you shift it manually. Go to the "Articles of Interest" portion of this board and read my comments on shifting, there's a section near the bottom about automatics. Just following those tips alone should help a lot. FWIW & HTH. . . PS: FYI, the air intake to your engine is up high on the driver's side radiator grill in front of the radiator itself. Short of being on the roof, it's probably in the "coolest" airflow available. (Message edited by rjlong on July 06, 2011) | ||
| Kyle Brandt (Kyle4501)
Registered Member Username: Kyle4501 Post Number: 624 Registered: 9-2004 Posted From: 71.12.88.184 Rating: N/A |
My question was to get you thinking & to hopefully help improve your understanding . . . . If the AC is powered by an inverter which is powered by batteries which are charged by the generator which is in turn, driven by the engine. This puts an additional load on your engine. What you may need to consider are ways to reduce the load on your engine - like proper tire pressures & reducing the total weight of the coach. You should also give careful consideration to "performance modifications" that are not already being used by the vehicle manufacturers. They usually only make money for the seller & do nothing more than reduce the wealth of the buyer. Good luck with your knowledge quest, Hopefully you will be able to find a driving technique that provides an acceptable performance improvement while not costing you anything. | ||
| Buswarrior (Buswarrior)
Registered Member Username: Buswarrior Post Number: 2098 Registered: 12-2000 Posted From: 174.91.147.167  Rating: |
Hold the phone, 5 mph up a grade out of Riverside CA? Yes, as RJ says, you need to shift the auto yourself, it downshifts too late for climbing, but you have bigger trouble right now. You are severely lacking in power. Air and fuel filters need to be confirmed as clean, and the next issue is whether the throttle is actually going to full fuel at the engine when being called for. After that, you can start worrying about what might be wrong. happy coaching! buswarrior | ||
| George M. Todd (George_todd)
Registered Member Username: George_todd Post Number: 1256 Registered: 8-2006 Posted From: 99.37.28.23 Rating: N/A |
BW certainly gets the vote for this one! I have seen Roger's bus, but I didn't check throttle travel. I have also seen an 8V92T with an air throttle cylinder that was installed so it only asked for about 40 mph. Somebody on the board here was really pleased when we moved it. Once we got the bus going, then we had to get it to stop... BW may be closer than he thinks, as I believe I remember Roger saying "NO smoke, and no heating problem." G | ||
| Ed Hackenbruch (Ed_hackenbruch)
Registered Member Username: Ed_hackenbruch Post Number: 2 Registered: 12-2006 Posted From: 72.102.41.106 Rating: N/A |
I manually downshift my auto tranny 99 percent of the time. The other 1 percent that i don't is because i am either not paying attention or distracted at the time. | ||
| Roger Baughman (Roger)
Registered Member Username: Roger Post Number: 229 Registered: 11-2006 Posted From: 71.136.40.12 Rating: N/A |
Boy, Lotts of good information. I sure do appreicate it very much. I will check each of your suggestions out carfuly. I love my bus and this will be fun. It will be a few months before I can get the time though. When I have another question on this I sure will get back. Thanks a whole lot. Roger | ||
| Luvrbus (Luvrbus)
Registered Member Username: Luvrbus Post Number: 1173 Registered: 8-2006 Posted From: 74.33.48.167 Rating: N/A |
If both the racks and the governor are not in sync a 2 stroke will be slow to respond I get that problem all the time at the shop 1 side binding and the governor not adjusted right FWIW good luck | ||
| Mike Eades (Mike4905)
Registered Member Username: Mike4905 Post Number: 213 Registered: 12-2000 Posted From: 70.126.183.226 Rating: N/A |
I had Luke change my cable shift to electric shift and I was able to down shift my 8v71 when I wanted to. I also pulled a thirty foot trailerwith my 4905. I ran every where but the west coast. I was a little slow on some the big hills but no big problem. I liked down shifting a little early to keep up the revs. it worked for me. | ||
| Roger Baughman (Roger)
Registered Member Username: Roger Post Number: 230 Registered: 11-2006 Posted From: 71.136.40.12 Rating: N/A |
I tryed to do a search on the shifting of an automatic 8v71 but couldn't find exactly what I was looking for. Is the main thing to keep the RPMs up as high as possable all of the time while climbing the hil? Or is there more to the shifting than that? Thanks, Roger | ||
| marvin pack (Gomer)
Registered Member Username: Gomer Post Number: 1465 Registered: 3-2007 Posted From: 76.4.118.153 Rating: N/A |
Roger, you drive a non electronic DD like you stole it up a hill especially. LOL I always try to shift as soon as I can get in the lower gear and keep the rpm's up. Gomer | ||
| Larry & Lynne Dixon (Larry_d)
Registered Member Username: Larry_d Post Number: 323 Registered: 7-2005 Posted From: 50.39.221.113  Rating: N/A |
Roger I am no expert but, I messed with the coach to find at what speed it shifted on its own. I then found what the highest speed I could downshift, doing this in all gears. I fine tuned the shifting after all of the testing. Tha hardest part of it all is to remember to shift at the speeds I had written down. If it starts to heat and smoke I let off just a bit at a time and level everything off Maybe someone that kknows more about it will pick up on what I do wrong also. Larry | ||
| RJ Long (Rjlong)
Registered Member Username: Rjlong Post Number: 1827 Registered: 12-2000 Posted From: 71.195.124.20 Rating: |
Roger - This is the article I was referring to earlier about shifting your coach: http://www.busnut.com/bbs/messages/12262/16204.html?1167073154 FWIW & HTH. . . | ||
| Roger Baughman (Roger)
Registered Member Username: Roger Post Number: 231 Registered: 11-2006 Posted From: 71.136.40.12 Rating: N/A |
Thanks, Gomer, Larry and RJ. Some very good information. I really do appreicate it, Roger |
