Engine power do you find your coach lazy

Topic: Engine power do you find your coach lazy (Read 2649 times) previous topic - next topic

Re: Engine power do you find your coach lazy

Reply #50 – August 25, 2020, 11:30:44 am

No my coach is not lazy. But I am. I'm retired. Plenty of time. And I don't like much going over 65. If the speed limit is 55 I go 54. Really not in a hurry. I found that using the transmission in manual mode makes going up hills much easier. Going down hills, I use the retarder to keep the speed where I am comfortable with. I do not like it to speed up to much. I am getting 8.1 mpg towing a jeep grand cherokee, and the coach is pretty loaded with tools and stuff. Jeep has some stuff as well. I like to keep the fuel tank half or better filled, and the water tank half or less. Waste tanks depends. I try to empty them, but sometimes I like to keep them up and let them bash around a bit with some dawn and borax in them to clean them up a bit. Only me, and a big dog in it.
I see 5th wheels/ pickups going real fast and think that I would not want to be towing that hunk that fast. To many people in a hurry, but then when I was younger so was I. The wisdom of age I guess.
Bob

Re: Engine power do you find your coach lazy

Reply #51 – August 25, 2020, 12:12:54 pm

When you are climbing a hill what is your boost. On the Dynasty I had the Allison had both the gear I was in and the gear it was
calling for on the gauge. I found out the Silverleaf could be programmed for that so all is good. I have driven around the Cabot
Trail with the old Dynasty, a 8.3 Cummins 325 HP with no problem.

Re: Engine power do you find your coach lazy

Reply #52 – August 25, 2020, 12:17:10 pm

Yes, some Allison shift pads have a single window that indicates ONLY the gear selected (for example when at a stop and select "D" it will show "6".

Other shift pads have two windows-- the right one as above and the left the actual gear you are in.

Yes, Silverleaf or the much less expensive Scanguage D can show the gear you are in for those with the single window shift pad.

Re: Engine power do you find your coach lazy

Reply #53 – August 25, 2020, 01:08:22 pm

Quote from: oldguy – August 25, 2020, 12:12:54 pm

When you are climbing a hill what is your boost. On the Dynasty I had the Allison had both the gear I was in and the gear it was
calling for on the gauge. I found out the Silverleaf could be programmed for that so all is good. I have driven around the Cabot
Trail with the old Dynasty, a 8.3 Cummins 325 HP with no problem.

dont have a boost gage have to look at buy a program to put in my I pad and hook in to dialysis plug on coach on old mechanical 350 you could change the button in the injector pump on these electronic ICS I have no idea on how they adjust fuel pressure

Re: Engine power do you find your coach lazy

Reply #54 – August 25, 2020, 09:28:43 pm

What boost do you guys hit? I hit right around 26 psi when I am really cooking. I've noticed lately though it really only ever seems to hit 24-25. Maybe it's time to start leak testing before things are an actual problem (or I overspeed the turbo). Cummins ISM 450HP.

Re: Engine power do you find your coach lazy

Reply #55 – August 25, 2020, 11:02:03 pm

Boost will depend on temperature and altitude. You might have to spin the engine 2-300 rpm higher to get the same boost and turbo will be also spinning faster to get the same PSI boost comparing sea level and 5000 feet. Good short read at: Boosting With Altitude - How Elevation Affects Turbochargers

Pierce

Re: Engine power do you find your coach lazy

Reply #56 – August 26, 2020, 07:06:16 am

On my 350 cummins my shift point is at 2150 rpm if I manual down shift around 1700 rpm it jumps up around 2100 rpm what is considered over raising I was toll not go over 2000 rpm years ago. She down shift a 1650 and up shift at 2150 automatically but manually shifting what do you shift that

Re: Engine power do you find your coach lazy

Reply #57 – August 26, 2020, 08:33:52 am

Quote from: Cape Bretoner – August 26, 2020, 07:06:16 am

I was told not go over 2000 rpm years ago.

I think you were "told" some misleading information. Our C8.3 RPM numbers are listed below. Our engine loves running between 2000 and 2400 RPM. The numbers for your engine should be very similar.

You can easily find out for yourself - just register your engine at Cummins QuickServe Online. Registration is free - all you will need is your ESN (Engine Serial Number). Once registered, you will have access to a wealth of info about your specific engine, including a list of RPM numbers.

Cummins QuickServe Online

ADVERTISED HP: 300 @ 2200 RPM

GOVERNED HP: 285 @ 2400 RPM

TORQUE PEAK (lb-ft): 820 @ 1300 RPM

HIGH IDLE: 2760 RPM

GOVERNOR BREAK RPM: 2450

Re: Engine power do you find your coach lazy

Reply #58 – August 26, 2020, 08:43:22 am

Nothing to compare it to so it runs great as far as I know.

Re: Engine power do you find your coach lazy

Reply #59 – August 26, 2020, 10:30:02 am

Quote from: Chuck & Jeannie – August 26, 2020, 08:33:52 am

I think you were "told" some misleading information. Our C8.3 RPM numbers are listed below. Our engine loves running between 2000 and 2400 RPM. The numbers for your engine should be very similar.

You can easily find out for yourself - just register your engine at Cummins QuickServe Online. Registration is free - all you will need is your ESN (Engine Serial Number). Once registered, you will have access to a wealth of info about your specific engine, including a list of RPM numbers.

Cummins QuickServe Online. Thank will do

ADVERTISED HP: 300 @ 2200 RPM

GOVERNED HP: 285 @ 2400 RPM

TORQUE PEAK (lb-ft): 820 @ 1300 RPM

HIGH IDLE: 2760 RPM

GOVERNOR BREAK RPM: 2450

Re: Engine power do you find your coach lazy

Reply #60 – October 07, 2020, 05:36:36 pm

I removed the radiator and air cooler from the coach rad is rotted out and did an air test with soap and water on air cooler and it's leaking all over . With air leaking I would lose my engine boost I believe this is the problem with it being so lazy they tell me with lost of boost comes lost of power looks like this is my problem

Re: Engine power do you find your coach lazy

Reply #61 – October 07, 2020, 10:40:36 pm

Would a dash boost gauge have identified this low boost from leaking intercooler?

Re: Engine power do you find your coach lazy

Reply #62 – October 07, 2020, 10:44:00 pm

Probably it would have been low I think

Re: Engine power do you find your coach lazy

Reply #63 – October 07, 2020, 10:46:11 pm

VMSpc shows boost, no need for a single gauge.

Re: Engine power do you find your coach lazy

Reply #64 – October 08, 2020, 01:57:18 am

Yes a 99 isc electronic c8.3 could have used a VPMS to show the low boost. As did his right foot and butt dyno

Re: Engine power do you find your coach lazy

Reply #65 – October 08, 2020, 11:23:38 am

Rick, you are correct in that a leaking CAC will cause low boost and sluggish power. Years ago I was finding our ISC 350 sluggish and did an inspection of the CAC visually and noticed 4 good sized holes caused by fuel cooler bolt missing and cooler was vibrating against it. Took it off and cleaned it up and repaired it properly with small aluminum strips of channel just big enough to cover hole and clip to either side of good part. I put very carefully a thin layer of Devcon Aluminum paste over the area first then more over the total area of clip and shaped it to go about 3/4" past either side, on each one. Left it 24 hrs then filed it smooth and pressure tested to 45 lbs. That pressure stayed good overnight so I new the repair was good. My boost has been even ever since and can go up to 32lbs when timing is right. I do have a Banks system on it so my reading is supposed to be up there.
So, it looks like a new one is needed for sure if there are numerous air leaks.
John H

Re: Engine power do you find your coach lazy

Reply #66 – October 08, 2020, 11:55:10 am

Before investing in a new intercooler, take the old one to a welding shop that hot roders/fabricators use. They can work magic on aluminum.

Pierce

Re: Engine power do you find your coach lazy

Reply #67 – October 08, 2020, 03:02:09 pm

You can put a new core in for a lot cheaper than a new intercooler.

Re: Engine power do you find your coach lazy

Reply #68 – October 08, 2020, 05:02:14 pm

Going to bring radiator and cooler and fuel cooler to Heavy equipment radiator and heat exchange shop and have them put a new core I was thinking of Atlas but there on the west coast and I'm on the East Coast and a different country. so I think my best option is just have it record. I've ordered the hoses and clams from Amazon and going to change all the air lines and fuel lines that are Hidden behind the radiator they're very hard to get at so while the radiator is out I shall do some pre-maintenance and change all the hard to get at stuff they look to be in bad shape there 21 years old The problem is I don't know where to stop it would be to hard to change everything into expensive

Re: Engine power do you find your coach lazy

Reply #69 – October 08, 2020, 05:07:24 pm

Radiator

Re: Engine power do you find your coach lazy

Reply #70 – October 08, 2020, 05:45:13 pm

You really have a lot of rust/corrosion everywhere and the radiator does not look so hot. But I guess I don't have to tell you that. I can see what you meant about not knowing where to stop. How does the bulkhead look? Lack of any kind of rust proofing there plus the design may indicate some attention needed. I'm not sure where I would even start.

Don't mean to mind your business but have you though about selling and finding a corrosion free coach before you go full time? Getting caught on the road with rust related failures can take all the joy of full timing and be really expensive where you don't have anywhere to do the work yourself and are at the mercy of a shop.

It almost looks like it needs to go to a shipyard in Mexico where they deal with a lot of rust and will be way less expensive. Was thinking of Guaymas.

Again, sorry for such a negative commentary.

Pierce

Re: Engine power do you find your coach lazy

Reply #71 – October 08, 2020, 06:26:07 pm

I just bought it in Dec the rest of the coach is in Beautiful shape body and paint the inside is just like the day It was built and has been upgraded. Every thing works on it. Tires are all new new battery's but I had to do the the bulkhead right after I bought it the first trip went down to Florida the steering box started leak had to replace it and now it started to leaking antifreeze and from the time I got it in Dec. I found it had no power it was lazy wouldn't pull her self in the hills slow taking off so when I took the radiator out tested the air cooler and sure enough that was leaking also. I got it for a very good pice $30,000 I figure With an other $25.000 I'll have it in top shape 55,000 I figure is cheap for a coach like this I can do a lot of the work myself and I have the building to do the work the lines do look bad . The frame and suspension all seems to be in very good shape the frame is like new but it's been a big project so far more than I thought it was going to be The previous owner lived in Ontario and travelled to Florida every winter so I presume he drove it in the salt and never wash off the salt with the Back wheels spraying the salt in the snow into the engine compartment the lines in the hose have taking a beating it's too beautiful of a coach just to throw it away I will do the rust prevention and rust check I do find it expensiveThe bulkhead was a surprise to me and I wasn't expecting the steering box to let go and the ad wasn't leaking at the time I don't know it might be a big headache in the long run My trade is automotive mechanic I'm sure learning a lot about diesels and coach's it's been a learning experience thanks to this form I got an awful lot of information and a lot of help and Brent has gave me a lot of advice in his articles and also others

Re: Engine power do you find your coach lazy

Reply #72 – October 08, 2020, 06:37:04 pm

The bulkhead repair has put you over the hump on having to worry about giving up. When you get the radiator and CAC done the rest should be minor compared to what you have done. If you can repair one of these then you are ahead of most members.

Re: Engine power do you find your coach lazy

Reply #73 – October 08, 2020, 06:50:02 pm

Quote from: craneman – October 08, 2020, 06:37:04 pm

The bulkhead repair has put you over the hump on having to worry about giving up. When you get the radiator and CAC done the rest should be minor compared to what you have done. If you can repair one of these then you are ahead of most members.

thanks it was scary at times not knowing what I was getting into but talking with people on this form I took the challenge and I think you're right the big articles are over with now hopefully my next project next summer will be the AC condenser and I'm hoping after that it will just be routine maintenance the previous owner has replaced airbags upgraded satellite dish upgraded the inside the headlights repaint out side he told he bought it in 2012 and rigth off the bat put $30,000 into it with redoing the inside repainting it would graphic scheme reupholstering all the furniture in it remove the carpet and redoing the floor with tiles all done in Texas Gave me all the Invoices to prove it and all the maintenance records of it from the time he had it in 2010 to 2019 he did look after the inside and outside very well except the engine compartment and the underneath I really enjoy it and learning a lot but I have to admit I'm starting to really enjoy the work and understanding how well-built they are

Re: Engine power do you find your coach lazy

Reply #74 – October 08, 2020, 11:41:26 pm

Rick, Atlas in south Texas, Corpus Christi if I remember. You cannot repair the CAC by welding etc. Too much carbon inside and will just blow apart while trying too.
How many leaks are actually in it and how big a leak are they,?
Do you have pictures of these leaks and if so send them too me. My email is on my profile
Johnh

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