I have a 4107 that the PO started converting. It's just an empty shell with a bunch of stuff in it now. He put a newer 8v71t in it with c60 injectors and an auto tranny. It also had power steering and air throttle in it. I'm moving it from wy to Texas here in a month or so. I just put used aluminum 24.5" wheels with new 11-24.5 on it. It starts and runs good. Doesn't smoke. The exhaust is a bit restricted due to he used parts and pieces to make it and I think it's only 4"at best but doesn't have a muffler. It weighs in at just under 30k with 9+ on the front and 19+ on the back. It drives decent but low end power is horrific. It's stored inside right now and I couldn't make it over the 1.5" entry bump into the storage unit without a good running start. Also the tranny gets real hot running down the road. The bus will do 70 on a good flat area but hills kill it real fast. I've been spoiled with my 2015 kenworth service truck with auto and a VGT 350hp hot rod that will pull hills at 80 all day long, so I'm trying to adjust for that.
Any advice for me?
I'm moving it down to Texas to work on it and finish the conversion. The trip is about 1000 miles and all my belongings are in it. I'll have a chase car with me. I'm concerned about the heat of the tranny, I don't have a gauge for it but when I stop and check it I can't put my hand on it for more than a second. And is the no low end power something to be concerned with?
Thanks!
Eric
You cannot touch a Allison transmission the normal operating temps are 170 to 210 F you can only touch 140F for a second with the bare hand sounds like you are ok to me.Your are not going to have any power with C60 injectors and turbo on a 8v71 sounds like you just have a smoke turbo for attitude that is a 270 hp engine if lucky
Ok, thanks.
Once I get it down there I'll look into what to do to make it better. I just need to get it and my belongings there safely. ;D
You will probably be fine buy a cheap IR gun and take a reading on the pan of the transmission about 30 to 50 mile into your trip if the temp is under 220 you are good lol and deal with 8v71 they faint at the mention of the word hill
Not sure if all setups with the 8V71 and Allison are the same, but I found on our 4106 that if I stuck to the 'sweet spot' getting over the hills was not as bad. At 55 mph I'd slow down low enough for the tranny to shift and end up going to to about 45mph. If I held at 62-63mph the bus would crest the hills at about 60mph. Granted I wasn't climbing any mountains, but maybe this can help you as a comparison.
Richard
Learn how to downshift that trans at the sight of a hill and keep the RPMs near the upper limit.>>>Dan (Speed is NOT a consideration when climbing)
Agree with everyone. If I day dream and forget to gain speed before a hill, i pay for it. I also run in 3rd gear whenever I go 52mph or under. So if I'm on the free way in my sweet spot 68mph and I hit a hill. As soon as it drops to 52, i downshift.
That's how I do my 6v92.
And this is why I traded my 6v92 in for a 500hp 8v92TA...I got really tired of planning for every bump in the earth. I have the opposite problem now, I keep speeding and I'm gonna get a ticket at the rate I'm going...80mph in a 70 isn't ok.
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Keep rubbing it in, blasting exhaust fumes to us putt putting in the slow lane. :o
Quote from: Scott & Heather on October 10, 2017, 03:24:19 PM
And this is why I traded my 6v92 in for a 500hp 8v92TA...I got really tired of planning for every bump in the earth. I have the opposite problem now, I keep speeding and I'm gonna get a ticket at the rate I'm going...80mph in a 70 isn't ok.
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I have to use cruise control to keep from speeding. The King Cruise unit was easy to install & their customer support is exceptional!
I do get better fuel mileage if I pay close attention to the hills AND IF traffic allows . . . . But not much better. ::)
Quote from: kyle4501 on October 10, 2017, 04:01:24 PM
I have to use cruise control to keep from speeding. The King Cruise unit was easy to install & their customer support is exceptional!
I do get better fuel mileage if I pay close attention to the hills AND IF traffic allows . . . . But not much better. ::)
Don't want to hijack this thread...do you have a another thread somewhere about the cruise install? It's on my wish list for spring.
Richard
Thank you all for your input!
So some of you use leaving blocks when you park, how do you get on them? I can't even get over a 2x4 without a running start.... Once I get going it seams to be as described for the rest of you. Good to hear I'll be ok getting to its new home.
A topic for later but what would you recommend for future upgrades to get a bit more power out of it. The engine
and tranny was said to only have 10k miles on a rebuild so I'm not interested in a transplant. Just upgrades to what I have, like bigger turbo, injectors, intercooler.... Things like that. I don't need to pass everything in site but getting on leaving blocks would be a good start...
Thanks
Change fuel filters before you go. Carry at least one spare set and 2 gallons of diesel fuel to prefill. Many times after sitting for awhile, once going down the road stirs the crap in tank and starts plugging filters. Make sure to take some hand cleaner, filter removal tools, couple rolls of paper towels, and a pack of blue g!oves, and a good led flashlight. Make a couple of short trips before and don't run flat out on the trip. Lots of things develop when running against the governor for hundreds of miles. Don't forget a couple of gallons of oil.
Hi Eric, Clifford once fixed my 8V71 on a 5A, when I filled my tank with 25% biodiesel. It ran, but at a quarter the power from before the fill up. He measured the fuel pressure and it was 6psi, when it was supposed to be 45 to 60psi. The biodiesel had clogged the 2 canister style fuel filters even tho they were new, lvmci...
Hi Tom,
Just to be clear, The BIO fuel didn't clog the filters. It was the junk in the tank that it released.
Biodiesel is a very good solvent.
It will clean the tanks(s) and the lines.
Multiple filter changes are normal until all the crud is gone.
Quote from: Scott & Heather on October 10, 2017, 03:24:19 PM
80mph in a 70 isn't ok.
Scott -Especially on tires rated for just 75 mph!
Eric -Something is not right if your coach won't climb a 2x4 on its side. As Chessie mentioned, change the fuel filters, and while you're at it, check the air filter, too. The other thing is the 4" exhaust downstream of the turbo is literally choking off the boost, so that needs attention - it should be 5" at least. (Are you sure it's got a turbocharger on it? Not a lot of LH 8V71Ts out there. Or could it be a 6V92T? Just curious. . .)
Weight seems a bit much for a 4107 shell, it should be closer to 22-23K empty. 32K is your GVW, btw - 12K front, 20K rear.
You don't say where in WY the coach is right now, but there are some busnuts in the area if you needed help. PM me for contact info.
FWIW & HTH. . .
;)
I'm typing on a phone so forgive me....
The filters have been upgraded to spin on. I drove it home about 100 miles when I bought it a few years back and have worked out some bugs since then. It was plugging up fuel filters every 50 miles. I had two sets with me, I would stop and "wash" them out and kept running until I got home. I since drained and rinsed the tank out with diesel, I also have run howes treatment and eco-clean as we have had agree grow in some of our equipment up here. l I checked fuel pressure and it was good 60+ psi. I have an extra set of filters with it. It is for sure a 8v71 with a turbo. They said it was from a 77 transit and he had one on his property. The exhaust is quite chocked down, I can hear the turbo spin up quite a bit when driving and rev ing up. I pulled the intake hose off and the turbo looks and feels good. It also had an upgraded dry paper air filter with a bunch of nuts on it. I have not taken it out to check, I should do that. It doesn't smoke other than a white puff when it starts, a bit of blow by but not bad. Doesn't use hardly any oil, very few leaks. I'll carry extra fluids with me. Unfortunately conditions were not ideal and I had to pack all our stuff in it and park it in a garage storage unit. We will be back to get it in a month or two and jump in and drive....
Oh and yes I weighed it on the port truck scales and I'm 10300 lbs front axle and 19640 on the rear. Heavy! It's basically a u haul right now!
Thank you all for your input! Keep it coming 😀
Eric
Quote from: richard5933 on October 10, 2017, 04:04:15 PM
Don't want to hijack this thread...do you have a another thread somewhere about the cruise install? It's on my wish list for spring.
Richard
Nope, it came with good instructions.
http://www.cruisecontrolking.com/rv-cruise.html (http://www.cruisecontrolking.com/rv-cruise.html)
The C-60 injectors are not a turbo injector and 5 in exhaust is better but it dosen't choke one down enough you tell except for the water temp there several 8v92 around in buses running 4 inch exhaust for clearance reasons .
Change the filter,check the fuel pressure ,all the linkage including the shut down. if that all checks out have someone set the air gap on the governor and be sure you don't have a throttle delay or fuel modulator on the engine that is out of adjustment if equipped.
If your engine has been A timed with C-60 injectors it is going to be gutless
When you get time, there is a procedure in the DDA manual to determine whether engine has standard or advanced timing. Majority if not all of them are standard timing with turbos. May need a DDA to check this if you haven't worked on them yourself. Even if it is set in advanced timing, instead of tearing apart engine to correct, there are injectors that can deal with this.
How and where is the turbo mounted? Somewhat tight spaces with the 8vs. Would like to see picture of the general mounting, if/ when you have time. Would like to add one to ours, along with the internal upgrades.