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Old 10-20-2016, 07:37 PM   #31
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Join Date: May 2009
Location: Columbus Ohio
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Year: 1991
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Chassis: International S3800
Engine: DT360
Rated Cap: 7 Row Handicap
very much so.. any of the HEUI engines need clean fresh oil.. most school fleet managers said 6000 mile oil drains are good.. but go 4000 if you can afford is their recomendation..

ive done quite a bir of studying on how these engines work... but basically in their "infinite wisdom" the yare usig engine oil as hydraulic fluid... I really didnt know standard engine oils held up at 1000+ PSI.. but under full throttle your HPOP is over 1000.. its 550+ psi at idle.. ... since this actuates the injectors.. thise nice little small oil passages in the injectors.. with dirtied up diesel oil... yeah wow.. but it seems to work..

the T-444E, the DT-466E, the VT-365, all examples of engines that use this technology...

I have heard of more than one occurance of someone piurchasing a non-running bus or trcuk only to change the poil and have it run perfectly....
-Christopher
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Old 06-19-2017, 05:01 PM   #32
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Hey cadillac,

Just an update that I was able to remove my speed limiter with a NEXIQ USB-Link 2 and the free ServiceMaxx software. I also enabled cruise control and even activated automatic engine braking in conjunction with computer controlled cruise control, which was a nice easter egg.

Despite the fact that my 175hp International is designed exactly the same as the 210hp version, I was unsuccessful in changing the parameters in the computer. They were not editable -- or, rather, the field was grayed out and I wasn't able to change it. I'd still like to tweak that. Any suggestions?

Also, speaking of injector pressures, I was able to monitor mine with that software and my injectors were ~580psi at idle, oil pressure right around 50psi.
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Old 06-19-2017, 05:14 PM   #33
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Way cool, I'm interested to know what the automatic engine braking does.
In my Silverado truck it downshifts the trans but with a standalone or an AT545 the ECM has no trans control.

The HP options are kept as a dealer only option, even my NavKal pro can't do an HP upgrade. Supposedly 350 bucks and it can be done but they may say you need to upgrade the trans, brakes, etc beforectheyd do it. Not sure if you hand carry an ECM to them what they would say.. tell them you installed an MT643 trans maybe?

I haven't yet tried to have mine upgraded. I may try after I see how the trans upgrade affects my cooling.
The way mine was running flat out on the freeway in 95 degree heat plus would cause me to run warm. So I wasn't ready to throw more fuel at it . I'm at 190 now, I can't remember what trans you have?
Christipher
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Old 06-19-2017, 05:24 PM   #34
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Originally Posted by cadillackid View Post
Way cool, I'm interested to know what the automatic engine braking does.
In my Silverado truck it downshifts the trans but with a standalone or an AT545 the ECM has no trans control.

The HP options are kept as a dealer only option, even my NavKal pro can't do an HP upgrade. Supposedly 350 bucks and it can be done but they may say you need to upgrade the trans, brakes, etc beforectheyd do it. Not sure if you hand carry an ECM to them what they would say.. tell them you installed an MT643 trans maybe?

I haven't yet tried to have mine upgraded. I may try after I see how the trans upgrade affects my cooling.
The way mine was running flat out on the freeway in 95 degree heat plus would cause me to run warm. So I wasn't ready to throw more fuel at it . I'm at 190 now, I can't remember what trans you have?
Christipher
Spicer 5 speed . No idea what the auto engine braking will do but I'm also curious to see how the cruise will work. I believe it will operate as an actual cruise control and not as a throttle control. Again, will be interesting to see how it works with a 5 speed manual.

Honestly, the power right now isn't bad with my 4.44 rear end ratio but that extra 10% or so would be nice. You say it's possible International might be able to tweak it if I take the ECM to them? Gotta say I'm a little disappointed I can't do it myself. You think any International dealer would do this for me?

Also, for anyone looking, I ended up with a clone NEXIQ unit for $300 off ebay. It worked just fine. I'm going to return it though because it isn't OEM. Should've known with that price ... but I was able to reprogram my computer .
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Old 06-19-2017, 08:55 PM   #35
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Very interested in the engine braking feature. Chris used his software to enable my cruise control.
From what I've been able to garner the 175 and 210 arent 100% the SAME. THe 175 and 195 are, though. Just a different programming, you can go from 175 to 195 by going to a navistar dealer or service center. I think the 210 has some differences in turbo and possibly cams/internals but that I'm not sure of.
I'd like to take my 175 up to 195 and upgrade the trans to a 643 or 1000.
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Old 06-19-2017, 09:11 PM   #36
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I know the 230 variant found in the RE busses has a bigger turbo and I believe only in the newer years where AD injectors were standard.. fairly major changes were made in the form of updates starting in feb 99, I se a lot of things listed for certain serial numbers above and below that threshold.
The oncommand book has different procedures for the 230 altogether so I know it's hardware is different. A visit to rush truck after the transmission up and ironed out will find out exactly what's needed..

Of course like mentioned before, results are unknown if turning up the smoke on a motor that's not fresh and is well broken in.. granted 20-40 HP isn't crazy but still..
christopher
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Old 06-19-2017, 09:39 PM   #37
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im going to give a shoutout to the at545's.

the more i learn about them, the more i like them. yes, its a slush box. but i wouldnt worry about turning up the power.

if memory serves, its rated for 30k and 230hp. i don't know what your bus weighs, but mine is only in the 20k range, which gives that transmission some buffer on moving that weight.

i honestly think i could turn my motor up much more with out changing transmissions. if you are well under the 30k, turn it up!
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Old 06-19-2017, 09:59 PM   #38
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im going to give a shoutout to the at545's.

the more i learn about them, the more i like them. yes, its a slush box. but i wouldnt worry about turning up the power.

if memory serves, its rated for 30k and 230hp. i don't know what your bus weighs, but mine is only in the 20k range, which gives that transmission some buffer on moving that weight.

i honestly think i could turn my motor up much more with out changing transmissions. if you are well under the 30k, turn it up!
its not so much whether the transmission can physically handle it or not.. its whether navistar will turn the ECM up knowing it has a 545 in it.. only one way to find out really.. and thats call them..

as for the 545, im a pretty decent fan of it (even though im swapping one out). it seems to be pretty stout.. the one in my DEV BUS shifts nice and crisp and is very responsive to my foot pedal about downshifting and such.. the one n RedByrd always seemed weaker somehow.. DEV has the earlier all mechanical one.

as for what can it take? well with my First bus, it was a GMC 454HD 2 barrell.. and without knowing any better (I dint think about the tranny.. I crawled under it and it looked BIG so i thought STOUT!).. I Built the motor up in that bus.. not a crazy build but enough I was probably pushing 300+ horsies (perhaps a lot more).. and it never did slip... the "whistle" from 1st to second seemed a little louder after I did that.. and granted I didnt drive that bus a whole lot as I lost interest in it (Long story for a bus geek to lose interest in a kickass bus).. so I mightve killed that trans prematurely.. but what i did drive it was pretty spirited and I didnt kill it.. it had to be a 545.. sounded like it and I know i had no lockup..

-Christopher
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Old 06-19-2017, 10:01 PM   #39
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Originally Posted by EastCoastCB View Post
Very interested in the engine braking feature. Chris used his software to enable my cruise control.
From what I've been able to garner the 175 and 210 arent 100% the SAME. THe 175 and 195 are, though. Just a different programming, you can go from 175 to 195 by going to a navistar dealer or service center. I think the 210 has some differences in turbo and possibly cams/internals but that I'm not sure of.
I'd like to take my 175 up to 195 and upgrade the trans to a 643 or 1000.
I thought I remembered Christopher making an earlier post a few months ago about how the 175hp to 210hp are identical while the 230 needs a turbo and/or fuel injectors .... but I could be mistaken. I called the local International place today and after taking down the last 8 of my VIN promised to call back tomorrow with some more info .... they quoted me $350 for any reprogramming. Must be a standard fee. I figure my 5 speed could take the extra abuse of a measly 25-35hp in any case... and my 4.44 rear end ratio should do fine as well. I'll keep you updated on the engine braking.
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Old 06-19-2017, 10:36 PM   #40
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That settles it... I need to take mine to the navistar place down in orlando once my paint job is done.
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