Our Mini Big Rig Can't Do the Speed Limit. Can We Fix It?

[@Motiv8Labs]

Lots of people asking what the tuner was. This is the "Orion" tuner from Power Hungry Performance. Bob with Power Hungry also wrote us to say they are fixing the 128 mph bug in the code.

[@BillCohron]

Um... That would be *BILL* with Power Hungry. LOL Thanks for sharing that. We greatly appreciate it!!! If you have any questions at all, please reach out.

[@SpeedLimit8585]

​@@BillCohronYou're him?

[@BillCohron]

@@SpeedLimit8585 Aye, laddie. That would be me. ;-)

[@USAF99]

Honest opinion, that TC is your first fix. It will address "most" of your concerns. Bouncing off 3k isn't helping EGT's, fuel mileage, or being kind to the trans. A flush and fill will help as an intermediate band-aid too. You gotta remember, all that time idling, that ATF was cycling and getting warm. A suggestion though, if you're going to have it down to change a TC, might think about a 5 speed from an F350. If I remember right, they used the same S5-42. You could get a non-pto version and get rid of half the stuff clogging up under the truck, or keep the PTO for a hydraulic pump. Hydraulics = all kinds of fun stuff like a tilt bed, jib crane, etc. Or onboard air.

[@Motiv8Labs]

Thanks for the feedback. I’m seeing a few people swap in the 5 or 6 speed Allisons so that might be an option one day.

[@Citizen63-j8k]

@@Motiv8Labs Home country of unsynchronized Fuller and talking gearboxes. Starting letter "A" 😁

[@D3rron08]

Hi sir, do you have a link to where i can purchase the similar tuner modules?

[@ProjectRoadsideFaith]

Definitely interested in finding a five or six speed for my 95 4700, can you share a link for that tuner?​@@Motiv8Labs

[@Jbzy3000]

All the information I was about to suggest. Until you get the tc figured out I might retune it to level 3. That pto stuff has to be a parasitic drag.

[@josephbugaj8149]

The truck being a 99 model year with the T444E and a 4 speed Allison transmission, you got the AT545 in it. The transmission has no lockup converter in it and doesn't handle a ton of additional power very well but they are robust units. A transmission swap would be ideal, and my suggestion would be an Allison 2500PTS. Those transmissions were used in a school bus application and they have hardened internals to deal with the job. Though that is my suggestion, you have quite a few options available for transmission swaps as others in the comments stated.

[@Motiv8Labs]

Thanks! I found some message board posts about people robbing those out of old busses. I'll keep looking into it.

[@josephbugaj8149]

@@Motiv8Labs Yeah that’s typically how it goes. I got a school bus that has one of the 2500PTS transmissions equipped, and I’ve had no issues with it. Bus itself is a 2006 IC CE200 with around 145,000 on the clock, and the transmission still runs through the gears without issue. What would make it better for your application in the truck is that it is a five speed instead of four. Later generations are capable of unlocking sixth with tweaks to the transmission computer.

[@crazyoilfieldmechanic3195]

2600 rpm is a high cruising rpm This is excellent advice as a lockup converter for a diesel is vitally important as anyone that has owned a 12 valve Cummins truck from 94 to 97 can tell you. Those things will wail away going up a hill pulling a trailer on the converter and as soon as the converter locks up off it will go lighting the turbo and easily accelerating. That is why 4 of my 6 Cummins trucks are standard trans. Better acceleration and pulling power.

[@VroomVroomLOL]

Get off the highway. You’re a danger to everyone. You think you’re funny, but you’re dangerous.

[@Dark_Knight_USA]

Greetings: I concur

[@pob_car]

With power mods the truck could definitely benefit from longer gearing. Yeah it’ll pull some torque back out of it but with tuning and modifications you’ll net more torque in the end. With some nice long gearing you’ll be able to cruise at 70 at lower rpm which will keep the engine and transmission super happy, as well as give way better fuel econ

[@brandonruhl4525]

yes

[@Nothingtoya]

What's the redline on the 7.3, 3500 rpm? I think a manual swap or a locking converter might be a better fix

[@pob_car]

@@Nothingtoya either that or less, those 7.3’s hate rpm

[@100pyatt]

@@pob_car 2.64-2.79 axle Ratio would be ideal. It also helps utilize the torque of the diesel. High RPM gears are a carryover from the gas engine days and it ruins the diesel advantage by forcing high RPM

[@100pyatt]

No, it won't "pull torque out" , it'll actually benefit from the torque with much taller gearing

[@manfredfritz6068]

I love that truck, can't believe everything was there from the factory it was just the tune, lol amazing!!

[@springfield4522]

Since 128 is a multiple of 16, my bet would be that the programming rolled over to zero. Setting it to 127 might have worked. Anyways that where I would have looked first for debugging.

[@migraineman33]

Betcha the software guys didn't test that value, either.

[@Titanic4]

128 seems to be negative value, given the value type used there. The flatbed would not move on D since 0 is higher than -128.

[@Trainz2950]

As a programmer, this is my thought too, a roll-over from 127 to 0 instead of 128

[@remyrauch577]

Could you explain why 16 is a value of interest in the programming? Or that's how I interpreted this at least

[@springfield4522]

@@remyrauch577 Computers use binary, (zeros and ones) and usually speak in hexidecimal (base 16) instead of base 10. In programming 127 is '0111111'. Some programming languages use that 8th bit to indicate sign (positive or negative). So in that case a signed 8 bit byte would have a range from +127 to -127. Which kind of makes sense since vehicles can have a negative speed when in reverse. If you try to assign 128 (8 ones) to that signed 8 bit byte, the value is read as negative 127. Putting a speed limit of negative 127 into your car means you arent ever going to go forward. So thats where I would start trying to debug the program. Sorry if thats too much crash course in programming, I dont know how much you already understand.

[@nathancarlisle2801]

Check your tires, they probably aren't rated for more than 75mph. Just something to keep in mind

[@andrewhatton1606]

I run cows and that doesn't mean shit

[@floridagunrat1625]

In my experience, cows mean a lotta shit!

[@DeadKoby]

That tune REALLY gave it some gusto. I'd almost think for safety, you'd back the tune off 1 peg and see if it's still adequate.

[@Madmax_402]

I would suggest buying a spare cam and crank position sensor. IPR valve with pigtail and possibly an ICP sensor w pigtail. Change the connector before you change the sensor though. Those are all fairly common failure points the triple 4 and most HPOP systems. The 110Vdv is the from the “IDM (injector driver module) /FICM (fuel injector control module)” to fire the injectors. Other failure points are the valve cover gaskets which have integrated pass thru connectors for the Injectors and glow plugs. If you can get BG EPR or seafoam and run in the oil per their instructions before an oil change, will definitely help the injectors, EPR has helped bring life back into some 6.0s I’ve dealt with.

[@Motiv8Labs]

Thanks for the feedback! I was curious what gremlins might start showing up on this engine and you pretty much called them out. I'll look into it all. Thanks for explaining that 110 VDC too.

[@Madmax_402]

@@Motiv8Labs I’d say they aren’t gremlins, just known failure points that cause a crank/no start start condition. A gremlin I just thought of since this truck didn’t see too many miles was losing gauges intermittently, the solder can break on the pins on the back of the instrument cluster which would need a soldered again at best.

[@BillCohron]

@Madmax There is no crank sensor in these engines. Just the cam sensor. And yes, it's definitely worth keeping one in the glove box or tool box.

[@misters2837]

All you guys are funny, had a fleet of 7.3PSD trucks, the ONLY problem was the injector harnesses...at 300K...Never changed a cam sensor.....EVER!

[@patriciomunoz2830]

LOL that's great, that is actually a TRUCK for towing in the rest of the world and not those fancy ass pick ups

[@Motiv8Labs]

Definitely not fancy but should get the job done, I hope.

[@josethebeast2236]

but them fancy ass pick ups will tow 10x better 😂

[@kennedy796]

​​@@josethebeast2236tow what 10x better? I've hauled loads with a 5 ton that most fancy pickup trucks would just fold in half under

[@JosephSanders-k6m]

​@@kennedy796 maybe a 1500 but a 2500 and 3500 cam handle 5 ton without folding

[@kirkpalmer1709]

@@JosephSanders-k6m He was hauling with a 5 ton truck. He wasn't hauling 5 tons.

[@pawsnazzy01]

As with any diesel you need to roll into the power, it gives the turbo a bit of time to catch up so you are not blowing smoke, That's over 50 years of driving trucks speaking. Black smoke is just wasted fuel, lots of young fellas think rolling coal is cool but it is the fastest way I know to catch the attention of the smog police(EPA), just not worth it. Lots of companies make a living of blowing smoke, but Gale Banks does some very cool stuff with the 7.3 and it burns clean. If you just take it easy with your right foot that engine/ trans. should last a long time. If you really want to hear the turbo run a stack up the side of the cab. lol

[@tylerjohn2]

Exactly. Gale Banks is the man!

[@Motiv8Labs]

Thanks for the feedback. Yeah the flooring it from a deadstop really was only for this test while not hauling anything. I can tell doing it with a trailer or load and the transmission will probably be sitting on the road behind the truck.

[@dandable]

I couldn’t tell where you installed that EGT gauge but depending on if it’s pre or post turbo, the readout can vary 200 degrees. And 200 degrees hotter than 1250 can mean burning a hole in a piston. Sorry if someone already posted this same comment.

[@kennedy796]

Probably guessing before the turbo since he mentioned putting the sensor in the driver's side manifold

[@cobra02411]

@@kennedy796 Looked like the manifold before the up-pipe, so that should be accurate out of the engine. If you go on the up pipe or just before the turbo it will read lower.

[@adamcostigan1043]

This is one of the better videos for power hungry showing what it actually does now hook up the heaveist most unaerodynamic trailer you have and watch the egts . Your biggest issue above 55 mph is wind resistance my old 180hp non turbo 7.3 idi had no problems pulling 20klbs until i hit 55 mph then egts would start going through the roof on hills .

[@Motiv8Labs]

Thanks we'll get the trailer behind it and see how it looks. I gave it pretty much the easiest test with no trailer or cargo on a nice day out here.

[@Kingsoupturbo]

Amazing how governed that thing was from factory, and drive by wire on the throttle for the age! Some crazy contraption PTO sprayer thing going on there.

[@Motiv8Labs]

Yeah the old drive by wire is pretty interesting. Probably something that will break soon maybe I should find a spare pedal to keep around.

[@Madmax_402]

The governor was probably set per the customer, a lot of people abuse company equipment when they don’t have to foot the bill. Or the tps on the pedal, they are built with dual sensors one will read 0-5v the other 5-0v, if there’s a mismatch you lose throttle rather than a potential runaway.

[@NGHmusic]

looks very sketchy. such a weird design

[@JeffreyWindley-n4i]

​@Madmax_402 The governor was set from the factory, so the motor will not blow . He should have tried the factory specs first to see if the truck was getting factory hp . The rpm is set by the transmission and rear end . To get the speed and rpm, he wants he need a taller rear-end .

[@jamesemmeneckersr.1875]

I am a 7.3 guy. I have 4 left from my company. My brother in law "had" a Sea Ray AmberJack 34 with twin 7.3 from Mercruiser. There is a guy back east that bought everything that merc had. People have done conversions with Duramax..GREAT IDEA for cruising

[@Motiv8Labs]

That's wild to hear about someone that actually had the marine version. I doubt I'll ever see one of those in real life.

[@maadmaxxer7289]

From UK. Saw the EGT in Celsius and thought, "oh good, numbers I'll understand" 😂

[@Yogi_Bear69]

Pretty much ONLY the US at this point. As a Canadian we are a mix of both systems for some reason. I understand Celsius and lbs. Feet and inches and km. I don't know why we are like this.

[@maadmaxxer7289]

​@Yogi_Bear69 I don't get the reluctance to move from inches to millimeters? It's soooo much easier than doing mental somersaults everytime you measure something 😂

[@Yogi_Bear69]

@@maadmaxxer7289 If I'm building a house I don't measure in mm no. Plus all the lumber in stores is measured in ft and in. drywall same thing. Everything related to construction is inches because it all comes from the US.

[@predator0121]

Love to see that you are bringing old iron out of retirement. I am going to echo what someone else already said. The truck would greatly benefit from a gearing change in the rear. Best time to do it will be when you swap out or rebuild the transmission. I am guessing that you are running a 5.44 or higher gear ratio. The truck was not designed to run faster than 60. If you do go for a gear swap then might I recommend a 4.55 or a 4.11 gear ratio. The 4.11 will greatly improve the fuel mileage and bring the RPM way down at 70 but you will sacrifice pulling power. 4.55 will pull better but the RPM will be higher costing you more fuel. Hope this give you some food for thought :D

[@Motiv8Labs]

Thanks for the feedback. I need to start looking at gears for that Spicer rear end and see if I can track some down.

[@stevenjones618]

But the 455 will be still better in mpg than what he has now.. our frtliner had a 13 speed and 321 in the rears.. got almost 9 mpg that was a 94..

[@4sl648]

I had a 2000 F250 with the 235hp 7.3 and a 2003 f350 with the 275 hp 7.3. Absolutely loved them. Both had the zf 6 speed manual. 500 and 525 lb ft, respectively. Great trucks. Make sure you keep the coolant treated so you don't wind up getting pinholes in the passages.

[@MarcBchannel]

Love those Interntionals. 300hp tune and a Fuller FSO6406 would be killer. And an exhaust brake

[@brockwaymt]

65 isn't bad. Based on the title I thought you had a 55 mph truck. Check the speed rating on your trailer tires. Many are 65 mph rated.

[@jonkeau5155]

In Texas if the speed limit says 75 but people often drive 85-95, at least now he’s going the out of state driver speed 😂 I think they even have a highway with an 85mph speed limit!

[@100pyatt]

​@@jonkeau5155yes 85mph speed limit

[@f150bft]

I have the 96 F250 non intercooled version of that 7.3. 15 pounds of boost is all my stock turbo will give but it's enough. I have an EGT sensor I need to install. Just haven't done it. Great video. Oh, we call those "medium duty" trucks. I drive one similar at work.

[@Motiv8Labs]

That's awesome on the 96. Explains why even used those trucks are still going for so much money, they last forever.

[@AquaticLogic]

Long time “diesel guy” here. Welcome to the club and I loved your video.

[@mikecrawford7352]

I always liked these older international medium duty trucks. I always wanted one for a daily driver. I learned to drive truck in its big brother, single screw heavy duty rated for 120k lbs pulling triples. I ran doubles a lot weighing ~80k I could pull 3miles 6% grade at 65 mph. I don trembler what motor it had but I had 10 speed transmission

[@tylerjohn2]

That is such a cool truck. Great find!

[@chinesepopsongs00]

As it is a computer i bet max speed 127 would work ok. As this gives a range of 128 when you count from zero.

[@BurtonBW3]

8 bit signed is a good guess!

[@Defianthuman]

That 0-60 was pretty good, especially for a truck that big. The after tune is crazy, with 110hp in my Prius 0-60 is 10.2

[@BIRD11BIRD]

I just picked up a 2002 International 4700 low profile truck. Exactly the same as yours. Thanks for the video. Its going to be used to pull Gooseneck hay trailers and have welding equipment for field repairs on our farming equipment.

[@Motiv8Labs]

That’s awesome! I like the low profile after driving this thing around for a few months now.

[@1Brycali]

Cant wait to see more of this truck been anting to build one for a long time

[@lenardgor]

14:16 thats bold of you to say. 😂 Metrik all the way buddy.

[@Buddha_the_Pug]

I drove this exact model as a flatbed wrecker for like 2 years, a 97 model 4700LPX. Best truck in our fleet.

[@Motiv8Labs]

That's awesome, I'm liking it so far.

[@2010HarleyDynaFXD]

65 MPH on a 75 MPH highway isn't bad people dont care they just go around you. Just stay in the right lane. I went around Grandpa doing 55 MPH I was doing 70 in a big rig on I-80 Nebraska near Grand Island just went around him no issues I didn't care. It's actually safer at slower speeds with big trucks because trying to stop is the hardest part of driving a commercial vehicle.

[@fire_node2416]

Right when you started driving I was like, man that thing sounds like a 7.3 and what would you know. It is lol

[@Mr.inky213]

I was with my grandpa once in his old kenworth w900. I asked him how fast it went 10 mins later speedometer was passed 85mph lol, absolutely insane to be in a vehicle that huge. Moving that quick. P.S i finished the video. Gosh dang !! What a time decrease!! Awesome it worked out for you. Is this a future channel project?? I subscribed to follow !!

[@Motiv8Labs]

That's awesome! We're going to keep working on it as we can, for sure.

[@b1air77]

The Freedom Units Converter at 14:30 is 🔥

[@hayzeproductions7093]

First... as a commercial driver who knows large trucks and have worked on them in the past... 2600rpm won't burn out a torque converter. 2nd heavy duty vehicles with large diesel engines usually don't have torque converters, but they can have air assist clutches and allison transmisions do a great job making it seamless between shifting gears and taking off. The govenors on older trucks can be hardware regulated, but if the throttle position sensor is drive by wire then speed govenor is software regulated, also with an eco tune after the highest gear is reached. For saving fuel. If the heavy duty vehicle struggles to climb a hill in final gear empty. You also need to consider a few situations hardware wise. Fuel filter, trucks run weak AF when enough water is trapped in fuel / water separation filter. - make sure boost clamps are nice tight, and you don't see dark oil residue leaking under the bottom / or around the boots because that can indicate a boost leak. If truck has an EGR, (probably not because age) make sure all components are clean including the sensors, because trucks will reduce power in ways that make you think your truck lost fuel pressure or running lean climbing hills while empty. Edited: Never flip the PTO switch while truck is in neutral You will tear the transmission up. Sit in the driver seat, put the truck in gear then flip the switch soo you don't hear that horrible grinding noise. Put truck back in neutral and the pto clutch in allison transmission will engage without burning the gears out. Allison transmissions are just as durable as eaton transmissions. This guy keeps talking about blowing it up. But has no idea the kjnd of abuse they both take hauling almost 80k groose weight, (even overweight upto 100k groose weight)

[@kennethmaccourt7393]

We've had a few internationals like that.. the last one was a dt466e inline diesel... most gutless diesel engine ive ever experienced so you definitely got the better engine with the 7.3.. We put a brand new transmission in it and a week later it showed us what the rods look like. If you need a rebuilt 545 with 70 miles on it let me know

[@waynec369]

I'm a little jealous. My '92 4700 didn't come equipped with a beer holder. Yours has two!

[@andresquinonezramirez9373]

Sometimes testing new things on old trucks is fun and seeing you doing it looks fun 😅

[@Motiv8Labs]

We're having fun with it, thanks!

[@20kcstudlee]

That’s pretty Damb impressive to be honest

[@Ares-jx4ep]

We have a retired school bus with the same engine/trans combo. Had the computer tuned.... that thing is snappy and will cruise at 80 all day long. Doesn't even notice a hill. For a bit of extra power and mpg a good exhaust is a must, as free flowing as your ears can stand. Turbo's hate backpressure. Clean oil is critical. The DT444E/7.3PS hates dirt and sludge. Changed more than one set of injectors due to owners neglecting oil changes. With that sort of idle time I'd seriously consider yanking the oil pan for a good cleaning.

[@Motiv8Labs]

Thanks for the feedback!

[@robinmurphy8705]

Hell, why not see if you can get it to cruise at 90 mph? You're wasting valuable time at 80 mph.

[@cobra02411]

I would just use 650 = good, 675 = careful and 700 = limit for the EGT. I'd add a temp gauge for the transmission and a good cooler if it doesn't have it. I imagine the Jet boat isn't that heavy though, so it should be ok.

[@marodification]

55 is the speed limit when towing. FEDERALLY 😂

[@youpi403]

12:11 *laught in french* lol Hates it when the opposite happens lol, good luck

[@johnspindler9732]

I remember being assigned this truck I’ll climb up it in the morning dread the day. We were not allowed to touch the governor at all

[@80spodcastchannel]

drove many tow trucks with that set up, but manual trans...INTERNATIONAL purposely sets them low to avoid liabilities. but yes, they got plenty left when you bump the tune.

[@Motiv8Labs]

That makes sense. I know the dealerships didn’t want to change the tunes for people either so this company just ended up making their own tuner.

[@80spodcastchannel]

@@Motiv8Labs the trans issues can be something as simple as a low stall converter getting "freaked out" by the up rated power output compared to the fairly tame stock levels. a ten second acceleration boost is probably a bit spicy for a stock transmission, and I'd be using that only when you need to merge quickly. other wise keep it as a reserve and drive it a bit more conservatively. or, get a tranny shop to make sure the bands and steels aren't overly cooked from too much high load and crawling on uneven ground in near stall conditions.

[@keithblakely4249]

Dude I hope you make more videos on this, there’s not very many people doing videos on medium/ heavy duty toy haulers

[@milesff7]

Should’ve got the dt466 in that truck. 7.3 v8 was too small for them. It’s all about the torque.

[@Motiv8Labs]

I wish it was the 466, but this was one of those cheapo Craigslist deals that I had to give a shot at.

[@SammyKurts-ku2ht]

With a re-gear and a tune and bigger turbo and injectors they really wake them 7.3s up ! Especially for towing

[@Chris_Troxler]

The dt466 is a hell of an engine, and probably would have preferred it over the V8, but the V8's were fine for medium duty. We had many of them in the schools buses that bigger and heavier than that little truck, and they held up great.

[@juanquinones2597]

Great content. Thank you for posting it. Just wanted to let you know you might want to lower the rear ratios to lower your rpm on that motor.

[@Motiv8Labs]

Thanks looking into rear gears to see if I can find any for that Spicer rear end.

[@juanquinones2597]

@@Motiv8Labs Great idea. Just looking out 😁👍. Continue bringing great content.

[@Flipping_Assets]

That's quite a good looking shop you have their.

[@nukekhang1740]

“It only has 4 speeds.” Reverse, here, there, and gone! 😂😂

[@addisontakacs7149]

yessss go diesel on the boats!!

[@Motiv8Labs]

Definitely looking into it more.

[@zirzmokealot4600]

Drove my 2001 international 4900 with a dt466e from middle of iowa to northern illinois. I could barely get to 55. Total dog. It was kinda quick to like 30 so it was good city driving.

[@tireballastserviceofflorid7771]

I got a freightliner fl70. It had city gears when I got it. 55mph max. Found a center section with highway gears and swapped them out. Took almost 4000 bucks and weeks of hunting nationwide. Got a stock 3126 and an Allison. She will do 70 all day now at 1925 rpm. It was worth it.

[@Motiv8Labs]

That rpm sounds perfect, I’ll keep searching for lower gears or taller tires to get this one dialed down.

[@tireballastserviceofflorid7771]

@Motiv8Labs Had every salvage dealer looking for 3 weeks. My very first guy found a unit in Ohio. LKQ trucks. They are extremely connected for finding parts. New gears and a rebuild kit would have cost me $2000 but could only get to 4.66 with my housing. Still to slow. Got 2.93 with the used unit. It's like 275hp maybe. Got loads of power for what I do. It's a 31,500 truck running under 25,999.

[@conorcooley9275]

lol I run US287 every day, recognized it immediately when you got on. I know that area way too well. I’ll have to keep my eye out for that rig!

[@Motiv8Labs]

Yep just keeps getting busier on the roads out this way. Used to be the country but not anymore!

[@outlawtrucker187]

That Allison is hard to blow up. Thats awesome tho. Love the truck

[@hill_customs6807]

I agree with some of the comments about the manual swap. With a good clutch. The eaton/spicer that came in these trucks should be a pretty straight forward swap.. lots of these trucks in the junk yards for big trucks.. or parked up in fields not being used.

[@Motiv8Labs]

That's a good idea, if I can find all of the parts like the clutch pedal assembly etc. from a donor truck/junk yard.

[@VHP7044]

Worked on many International Diesel Engines. In my opinion the T444E is ok in a medium duty if it is a truck and not towing anything. If you are able to upgrade to a 466 you will solve your problems.

[@Evan394]

The diagram of temperature conversion is fantastic.

[@darkknight84123k]

Love those old trucks

[@Motiv8Labs]

I'm loving it so far!

[@Josh.Davidson]

My theory as an engineer for why the throttle didn't work is how binary numbers are stored. And that the actual max is 127, because it starts at 0. To get 128 you'd have to add a binary place. So that likely caused an overflow either when the ECM was being programmed or in the ECM itself. Anyway, no manual swap it!

[@jamesweidenfeller2699]

If that truck is from Texas I am impressed with the amount of rust under the truck. It looks like my trucks from Michigan

[@Motiv8Labs]

Since it was a lawncare truck it was spraying yards with chemicals every day so that probably didn't help either. Pretty rusty.

[@failranch9542]

Careful there. As you’re finding out, playing with diesels will turn you in to a “soot head”. 😀

[@garycheavin8768]

the "stupid metric system" which is used by every other country in the world is something i found amusing, especially considering that every thing exported by the United States has to be made in metric. Great Video and what a fantastic result !

[@Barbaratio]

You're good on boost pressure, max on the 7.3 factory turbo is 30 PSI

[@DatBoiOrly]

Personally it just needs a powertrain revamp! bigger turbo, bigger injectors, a inline fuel pump finally a better transmission luckily most of these can be salvaged from other diesel big rigs, school busses esc at a scrap yard.

[@Motiv8Labs]

Thanks! That's what I started looking into, we'll see how it goes.

[@jrpumper]

Where did you get the tunner ? I have a international truck that needs help also

[@Motiv8Labs]

gopowerhungry.com this is their Orion Reflash System for Navistar systems. I’m not vouching for them yet since I’ve only messed with it a few days. Seems be working ok though.

[@D3rron08]

Yes , I too have a truck and im interested in said tuner.

[@BillCohron]

The tuner is from Power Hungry Performance.

[@D3rron08]

@@BillCohron thanks

[@D3rron08]

@@Motiv8Labs thankss

[@shoutingatclouds1050]

What a great video. 80 is posted in Dallas area's so cops don't bother you in a (Car) up to the 90's mph. In the Dallas area that truck would have been thrown in the scrap yards and you saved some good American steel to live on the road agin. I definitely did subscribe If you can find one the International Harvester TravelAll 1961/69 will get clicks and views and a Cummins Diesel just makes them nice like a old Mercedes wagon, ya know it's unique but not down right goofy like a trucktor.

[@blackbuttecruizr]

Super awesome!

[@Frankiekent6]

I would have sent it at the 300 horsepower setting, the engine came rated for that so it’s safe, If you wanted to do injectors, and turbo, then I’d be more worried about it. That being said I admire your willpower, I have scattered my fair share of motors

[@Nothingtoya]

Seems like the engine might handle it, the trans will not.

[@racer193wr]

More videos with this truck please. Had a 2000 with a 19' roll back tow truck with a dt466 and the thing was a tank had a 110km/h limiter like yours whuch was fine for pur two lane roads but not for highway speeds. People used to get a kick put of watching me wheel the thing into figure 8s and big sloppy drifts through the parking lots in the winter time..

[@JeronWhite]

It a good truck

[@Motiv8Labs]

Thanks we're having fun with it so far.

[@TheNikitis]

So I have a 1995 School bus with the same exact setup as your rig. Same engine and chassis. I did the upgrade you did to 210HP from 175HP, and my AT545 transmission slipped almost instantly. It wouldn't pick up gear after 2nd and I had to wait for it to cool down for it to work again. It's too much HP and will slip past. The AT545 only can handle 400lbs of torque, and 210HP will blast right through that and cause it to slip. Until I upgrade my transmission to AT1000 6 speed, I'm stuck at 175HP. I'd like to see a video if you upgrading the transmission on a 6 port J1708. that would be a feat.

[@Motiv8Labs]

Thanks for the feedback! Good to hear from someone with a school bus setup. I started reading some of the schoolie message boards about people doing transmission swaps. That AT1000 sounds like it would be great if a standalone transmission controller would work.

[@eddiearndt1949]

Cool video.

[@danapicray9040]

You really need a Banks tuner and a overdrive transmission

[@danapicray9040]

I would be worried if your exhaust temps are that high empty,what would they be under a load.

[@plutoxdior6541]

banks is weak

[@shakes7333]

The 7.3 started out as a tug boat engine before being used in road vehicles.

[@Motiv8Labs]

Makes sense with how many hours they seem to get out of these things.

[@pumpdump4476]

Sorry to disappoint ya but the 7.3 PS was designed (under contract) for Ford and adapted for road trucks (DT466E) and later on adapted by Mercury as a marine power plant. The only (that I know of) diesel designed by IH for marine use was the Cursader 9.0L. With that being said IH did provide several gas engines for marine use. You my be thinking of the Cummins BT series, they put that thing in EVERYTHING prior to Dodge making their deal.

[@adiamondforever7890]

@@pumpdump4476 a 466 is a six cylinder in line engine, a 444 is the 7.3 either idi or open chamber (444e). Have fun

[@rick3090]

What will be the biggest downside of the programming is that all the numbers you got really mean nothing, until you hook up a load to it then test it, what some people do is put the horsepower on medium or high, but when they run it on a load it doesn't take long before it heats up, and you have to back out of it, especially pulling hills or mountain areas, that Pyro will be your best friend .

[@Motiv8Labs]

Makes sense. I'm getting used to driving by way of watching. It's different way of thinking for sure.

[@claysonwebster1622]

Awesome vid bro, had to subscribe right away glad if you can do some upgrades to the transmission

[@Vengancejr]

14:21 Chart reminds me of the color coded logs from Back to the Future 3

[@AbsolutionArmament]

I sent a DM to your insta of my international build. Currently the biggest thing limiting you is the AT545 transmission you have. But the motor's themselves have a good aftermarket thanks to the 7.3PS and most issues or things to watch out for are well documented. There are a few oddities on these that don't translate well from the fords. Such as the downpipes, I had to fabricate my own while upgrading the turbo. But for the most part it's straight forward.

[@Motiv8Labs]

Thanks for the feedback I'll have to check Insta!

[@Mach_Style]

don't know if you mentioned it in the few places I skipped by, but honestly along with that final tune, you just need to some bigger 19.5 or 22.5 wheels and tires. Those little 17.5 wheels are not helping your speed and gearing. Some taller rubber will get your cruising RPM down and hopefully increase fuel economy and will technically be easier to do versus a rear end rebuild. Facebook marketplace will always have some old 22.5 Alcoa's up for ale and sometimes with good rubber too for cheap.

[@65BAJA]

You can cut that 0-60 time in half by playing this video at 2x speed...:)

[@ram89572]

Those pre-emissions diesels could be pretty reliable. Modern ones though, well.....

[@researcher4good]

For the EGT gauge to be accurate, the sensor needs to be before the turbo, close to the exhaust port. Not sure if it is or not. It can read low.

[@mortisebrodus6449]

It’s OK if you blow the transmission,Now u can switch it over to manual great video

[@Motiv8Labs]

Thanks for the feedback!

[@phatboizbackyardkustomz9006]

I have had 2 of those LPXs they are great little trucks. Back in the day it was hard to find a tune back in the day and International/ Navistar was no help. You can change the ECM to a Ford power stroke to get a tune on it. Initially I would not worry about the Allison shifting they shift funky compared to what you are used to with a normal car or truck transmission. If it does take a dump put an Allison world transmission 1000 and up series to get more gears and an overdrive. or manual it. The rears gears are also low and it is hard to find a more highway ratio for them. and you should be able to go to a junk yard to find the factory A/C components to put A/C in it the cabs are all the same in all the S series or 4700 to 8100 series. Some of them also had air ride rear suspension. Most of those LPX series trucks were made for Trugreen a nation wide lawn spray co. They did produce others some with automatic and manual transmissions for other applications But all the LPXs had 7.3 power. The also made a limited amount of crew cabs which are rare. I am looking to find another one myself for a little toter. 22.5 low profile tires will help some what with the low gear deal and still give the low profile look. Good luck have fun with her.

[@Motiv8Labs]

Thanks for the all the feedback. That's exactly what this was, a Trugreen truck. Still has one of the Trugreen stickers in the cab. I'll look into trying to find some cheapo 22.5 wheels and tires. The rear end says Spicer 3.54 on the label, so I was curious if they made anything less for a gear ratio on those.

[@runningajar8259]

My brother put stiffer governor springs in a 408 and then it started blowing turbo boots so he turned the fuel down to avoid changing the turbo. We were pretty sure someone turned the fuel up before we got it. There is always variables and problems you dont know about until it happens. The problem we had with the 408 and 6 speed manual was when after shifting you had a couple hundred rpm to gain to be in power. Either figure out if it was fueling or turbo incapable of sufficient boost, the choice was to increase the governor so it could get above 3k under acceleration.

[@Motiv8Labs]

That's awesome. I wouldn't mind if this one had a manual, wouldn't have to worry about that auto blowing apart.

[@gbppittpetitt8684]

I remember driving one just like that! The exhaust was nasty! Blew black smoke! Just like that one!

[@aaronedwards8217]

your EGT or pyro probe gos behind your turbo in the out flow pipe so you know the temp of your turbo not in the manifold

[@mattniggli9661]

These allison transmissions were meant to shift like they were slipping. They are a tank of a transmission that is hard to kill.

[@omegalpha28]

I know in the f series trucks that 23.4 is the max that the manifold pressure sensor understands. It sets a code for excessive manifold pressure when you hit that. With a mechanical gauge some report actual boost as much as 30psi.

[@CountryHomestead1]

What is the tuner information, i would like to look into it for my truck.

[@Motiv8Labs]

gopowerhungry.com this is their Orion Reflash System for Navistar systems. I’m not vouching for them yet since I’ve only messed with it a few days. Seems be working ok though.

[@CountryHomestead1]

Any information on the tuner you used would be appreciated.

[@CountryHomestead1]

@@Motiv8Labs thank you

[@Prucake]

damn that turbo, truck sounded like it just breathed for the first time lmfao

[@35004banger]

Be careful with the AT545 transmssion, if that's what it's got. 230HP is the design limit for the transmission. it LIKES to spin fast (2000 rpm is the minimum input shaft speed for the pump to generate full pressure), but be aware that with no lockup converter, when you're pulling a load you HAVE to keep an eye on the transmssion temp, as the converter will generating LOTS of heat. I have one in my motorhome behind a cummins 12 valve, and I end up driving it by the temp gauge.

[@tyrstone3539]

i watched the part where you timed it... i was just doing that in my international 4300 today... yours is faster !

[@Motiv8Labs]

I feel the pain, it was so bad before, especially trying to pull a trailer and get on the highway.

[@The-Ford-Guy]

Those Allison transmissions are pretty strong but I wouldnt bet the farm on a used truck and it holding up to big horsepower without knowing it's history. Buying a truck like this with a manual trans would have eliminated a lot of the questions.

[@Motiv8Labs]

I wish it was a manual, but this thing showed up on marketplace for cheap so I took a chance.

[@The-Ford-Guy]

@@Motiv8Labs, yeah, I certainly understand that. You have the basics for a really great truck and being that those trucks were so common in their era, upgrades should be relatively easy. For instance, since a trans rebuild will sooner or later be inevitable, start checking the internet for better stronger aftermarket parts. Or, as that truck was also offered with a 7spd manual, I have no doubt you could locate the factory parts (clutch pedal and linkage) to change it over to a manual set up. Personally, lol, I would run it as/is till it breaks. Those 7.3's are in my opinion the single best engine Navistar ever made with the DT466 running a close second. Just be religious with the maintenance and you'll probably get a lot more miles out of that truck. Best of luck man!

[@ngelemental2274]

He broke the algorithm with this video😂

[@Motiv8Labs]

Funny how some videos we spend a couple weeks doing might get 500 views, and this one day throw away video does better. That's youtube for ya.

[@AntoineMcAdams]

I recommend replacing the Allison AT545 Transmission with an MT643 it's a much better trans and it has lockup

[@Motiv8Labs]

Thanks for the feedback I'll look into that transmission.

[@aeastman16]

I second this. It’s nearly a bolt in swap, just need to remove the bellhousing adapter, have the driveshaft shortened, and possibly redo the cooler lines. That or find a donor truck with a manual

[@billhutchinson2574]

Increasing the horse power will help on the hills somewhat. You can only increase the truck top speed by either stepping up the engine RPM's (NOT Recommended), or changing the differential ratio. If you do increased the RPM's, the engine and drive train Will NOT last long, I had 5 International 4300's which only ran 55 mph. These trucks were made for the school bus market. Navistar warranty replaced the differential ratio's and it changed the top speed from 55 mph to 67 mph.

[@Motiv8Labs]

Thanks for the comment. The rear end has a tag Spicer 3.54 so I’m trying to see if I can source any lower gears for that rear end. Or taller tires.

[@TsunauticusIV]

Ran a truck like that and the trans felt slippy from new. It got worse but never failed. I climbed Allegheny mountains every day with it for years. Run that trans and converter until she fails. If that truck drove around underpowered for all its life doing lawn care and idling most its life… you should have plenty of life left in the trans.

[@codystrom8708]

Interesting choice to go with 7.3 over the dt466 that a lot of these trucks came with, the 7.3 is known to be the most gutless modern turbo diesel in existence 😂