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Old 07-25-2016, 02:57 PM   #31
Bus Nut
 
Join Date: Apr 2013
Location: Colorado
Posts: 848
Year: 1993
Coachwork: bluebird
Engine: 5.9 Cummins, Allison 545
Rated Cap: 2
no improvement with the Transynd is disappointing to hear. hope you get it figured out.
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Old 07-25-2016, 03:14 PM   #32
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 3,431
Year: 1991
Coachwork: Carpenter
Chassis: International S3800
Engine: DT360
Rated Cap: 7 Row Handicap
everyone's idea of "sluggish" is different... if the bus is on flat ground you pound it to the floor how long does it take to reach 30 MPH, 40 MPH, 50 MPH, and 60 MPH.. pretty much every bus ive driven is a LOT slower than a car..

yes the newer one with higher horsepower engines and lockup transmissions will do much better but it may just be normal for your bus.. there are a lot of slow busses on this forum...

mine will go 68 Maxxed if I run it foot to the floor on flat ground but when I run it 60, its practically a dream to drive.. so i just dont run it faster unless I feel im a danger in the downtown traffic of a city or such then Ill push 65...

if tyou time your speed-up and its way sklower than other busses liek it then id be concerned of an actual problem but if it seems to match other similar busses and drivetrains then id pack the sucker full and have a nice relaxed moving trip

-Christopher
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Old 07-25-2016, 05:16 PM   #33
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Join Date: Feb 2015
Location: North carolina
Posts: 529
Year: 1986
Coachwork: Thomas
Chassis: Ford
Engine: Detroit 8.2
Rated Cap: 60 bodies
I have an 86 with an 8.2 and the 545 and with the peddle to the metal I am slow off the line, hit 2nd about 15mph 3rd about 23 and drive about 27-30 after that it takes a few to hit my top end of 49mph.
My rear gear of 6.50 needs to be changed along with taller drive tire to hit 60.
My bus stays in a gravel/dirt drive and no more than I move it right now? Because of the sinking, I am at at least 3/4 throttle to start moving but after that it is bottom out on the main road to anywhere.
Check your rear gears for size.
Mine are designed for stop and go with some pulling power and that's why I am slow with 6.50 gears.
From what I have found? For highway speed I need to be in the 4 range but I will lose a lot of the towing capabilities? So I am still debating what change I want to make.
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Old 07-25-2016, 10:20 PM   #34
Mini-Skoolie
 
Join Date: Sep 2008
Location: North Carolina
Posts: 26
Year: 1996
Coachwork: Mid-bus
Chassis: international
Engine: t444e
Rated Cap: 49?
yes i get it that sluggish is relative. What I am comparing it too is my previous driving experiences, where it certainly wasn't a race car, but also had a bit more pep in its step.

I was able to get up to 45 (speed limit) along a flat stretch in probably 35-40 seconds? didn't time it...

my main concern is hills. A few times today driving around town, climbing hills from a dead stop the bus struggled to push 15 mph. Or would loose speed significantly on hills of decent grade and distance. Not altogether uncommon for an older diesel for sure.

the other frame of reference I am using is the gauge on the fuel system which seems to be showing a much wider range of swing then when it was first installed and the bus was running like a top. I am considering the fact that with the veggie oil plumbing and pressure /vac gauge plumbing there could be a small air leak somewhere causing the gauge to swing like it does. I will try to inspect and tighten all threaded connections tomorrow as well.

I didn't hit the highway today, it was in the 90's here in Western North Carolina, but chugging around this hilly town I did see some temp climbs into the low 210's. I'm hoping that will be the top temps I see, but the true test is some of these mountain passes leaving out of NC and TN. I think once I hit 81 in VA I will be good.

Planning to get out on the highway and hit some hills with some speed behind me. Will try to time my acceleration speeds while im at it. Will keep y'all updated.
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Old 07-25-2016, 10:32 PM   #35
Mini-Skoolie
 
Join Date: Jul 2016
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Quote:
Originally Posted by Bungeekord View Post
yes i get it that sluggish is relative. What I am comparing it too is my previous driving experiences, where it certainly wasn't a race car, but also had a bit more pep in its step.

I was able to get up to 45 (speed limit) along a flat stretch in probably 35-40 seconds? didn't time it...

my main concern is hills. A few times today driving around town, climbing hills from a dead stop the bus struggled to push 15 mph. Or would loose speed significantly on hills of decent grade and distance. Not altogether uncommon for an older diesel for sure.

the other frame of reference I am using is the gauge on the fuel system which seems to be showing a much wider range of swing then when it was first installed and the bus was running like a top. I am considering the fact that with the veggie oil plumbing and pressure /vac gauge plumbing there could be a small air leak somewhere causing the gauge to swing like it does. I will try to inspect and tighten all threaded connections tomorrow as well.

I didn't hit the highway today, it was in the 90's here in Western North Carolina, but chugging around this hilly town I did see some temp climbs into the low 210's. I'm hoping that will be the top temps I see, but the true test is some of these mountain passes leaving out of NC and TN. I think once I hit 81 in VA I will be good.

Planning to get out on the highway and hit some hills with some speed behind me. Will try to time my acceleration speeds while im at it. Will keep y'all updated.
Probably a leak, if not,
Is the veggie oil strained to same or smaller than the filter?
What's your cfpp on the oil?
What's your TAN on it?

I have seen the problem where TAN is off and it eats the pump internally.
Cfpp is usually a freezing cold weather problem, unless you're using a palm oil blend.
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Old 07-26-2016, 12:03 AM   #36
Mini-Skoolie
 
Join Date: Sep 2008
Location: North Carolina
Posts: 26
Year: 1996
Coachwork: Mid-bus
Chassis: international
Engine: t444e
Rated Cap: 49?
sorry, i know this is confusing.

the veggie oil system is plumbed separately and I am not currently burning veggie oil. Using diesel at the time being, which is entirely independent from the VO
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Old 07-26-2016, 09:19 AM   #37
Mini-Skoolie
 
Join Date: Jul 2016
Posts: 45
Does your cold start system have a magnet on the end of the injector pump to pull the rack open?

If so try hitting the cold start when it loses power.
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Old 07-26-2016, 08:26 PM   #38
Mini-Skoolie
 
Join Date: Sep 2008
Location: North Carolina
Posts: 26
Year: 1996
Coachwork: Mid-bus
Chassis: international
Engine: t444e
Rated Cap: 49?
pulled out the veggie oil solenoid and the fuel pressure gauge sender set up, and got on the highway. And it totally kicked butt! It felt more or less the same at take off but once I got it up to 45 it felt strong and totally climbed to and held at 55 - 60. Even climbing some big hills it held at about 45-50. So, Im happy with it.

I disassembled the pressure/vac sender T and cleaned up all the threads on the hose barbs/components, and reinstalled them using high temp thread sealant. Will plumb it back in tomorrow once it all dries. Its a useful diagnostic tool even without the veggie system running.

I did notice a very small amount of coolant beneath the bus after it had been parked for about 20 min and think its the thermostat gasket as it looked wet around the housing. Left it running when I got it back home and didn't notice it actively dripping or leaking, so it might just be a minor issue.

What temp thermostats are best for this engine? I think i don't have one in mine. remember pulling it for some reason a while back and its sitting in the cup holder on the dash. It might have stopped opening... Oriellys couldn't source one.
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Old 07-26-2016, 09:55 PM   #39
Bus Crazy
 
Join Date: Nov 2011
Location: Sault Ste. Marie, Ontario
Posts: 1,239
Year: 1997
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Chassis: B3800 Short bus
Engine: T444E
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This is great news! And I agree with you: it's worth keeping that fuel pressure gauge if you can get it running without restricting the fuel flow.

Quote:
Originally Posted by Bungeekord View Post
I did notice a very small amount of coolant beneath the bus after it had been parked for about 20 min and think its the thermostat gasket as it looked wet around the housing.
While it probably is the thermostat gasket, those thermostat housings are notorious for leaking. If you find that it is the housing then you can upgrade to a billet style housing: 7.3l thermostat housing | eBay

Also, the fan clutches do crap out, too. Mine hasn't come on yet in my T444e. I've had to use the interior heaters a handful of times to dump heat out of the engine.. Mighty uncomfortable in the summer heat! A new fan clutch is on the todo list.
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Old 07-26-2016, 10:22 PM   #40
Mini-Skoolie
 
Join Date: Sep 2008
Location: North Carolina
Posts: 26
Year: 1996
Coachwork: Mid-bus
Chassis: international
Engine: t444e
Rated Cap: 49?
that thing looks just like my housing. not sure what the stock set up looks like...

is a thermostat from a powerstroke ok to use? whats the ideal temp thermostat? any danger in not running one?
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