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

[@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.

[@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.

[@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.

[@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 😂

[@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.

[@dougmasters3875]

My F250 is rocking a 7.3, with a tune it's damned impressive!!

[@Motiv8Labs]

That’s awesome it makes sense why those old trucks are still $20k+ used. It’s wild.

[@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.

[@1Brycali]

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

[@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.

[@dalemettee1147]

The speed limitation is called a governor. It's supposed to operate on vacuum and speed. So under little load, it controls the top speed to 65 MPH. Under load, it's supposed to let more throttle open to help keep the speed up. I thinks that this limiter can be removed.

[@LawF250]

This is an International 444 AKA 7.3L. No throttle body or vacuum control involved. It's drive by wire, computer controlled.

[@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.

[@richardmurley8976]

good vid! i have a 98 nearly identical except it has a custom aluminum flatbed with under toolboxes. i need to do a walk around vid of mine sometime. hoping to see more of what becomes of your truck.

[@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.

[@carlthor91]

A question. Are you building a hauler, or a large pickup? Set your sights, but don't try for both. Unless you have lots of cash. The carnage will be spectacular.😱😎 Best wishes from ~2,000 miles North.

[@Motiv8Labs]

Mainly just a decent truck to haul our boats and cars and junk around the area. Nothing too fancy for us!

[@carlthor91]

@@Motiv8Labs Not fancy. Sustained power desired? Good torque, achievable RPM range, longevity. The devil is in the details. Best wishes.

[@addisontakacs7149]

yessss go diesel on the boats!!

[@Motiv8Labs]

Definitely looking into it more.

[@johnphdk]

To haul stuff, you dont need speed, you need torque

[@FreezyAbitKT7A]

When I was a kid I had a Suzuki TS90. It would only go 65mph.

[@Motiv8Labs]

I had to look that up. Cool looking bike!

[@ram89572]

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

[@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.

[@TKevinBlanc]

Ryan Bingham is a great choice.

[@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.

[@65BAJA]

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

[@haroldparker3487]

Why is the CB radio mounted upside-down?

[@4X4F250Diesel]

Php is great helps the power

[@superstitiousfishes1247]

FREEDOM!

[@michaelbenoit248]

If you can’t take the stupid music out please do because when you went to test drive after the tuning I want to hear the 7.3 not the stupid music. I love 7.3s & want to hear it scream.

[@brianbrwa]

Look for an upgrade to the AT545. Something out of a Chevy Duramax.

[@Motiv8Labs]

I see a few people are swapping in the 5 or 6 speed Allison’s with a standalone controller. Looks like might be an option one day.

[@nickbowes2627]

steering wheel would drive me mad its more crooked than Trump.

[@talonpilot]

Your obsession with going 70+ in a big truck thats designed for short haul day use is of concern; obviously that truck was made for farm type use. No one pulling a trailer (RVers, Big trucks, etc) needs to be driving 70+. Just give yourself more time and be safe or get an appropriate engineered/designed/built truck.

[@marlonmercado4359]

I am wondering why you think metric system is stupid.

[@doriandarby]

Probably some 2nd amendment crap the yanks like to bang on about

[@BeamerTheFox]

@@doriandarby racist

[@mrbill8542]

Because here in america we were all taught US measurements !!!

[@Motiv8Labs]

School only taught us 0 degrees is cold outside and 100 degrees is hot so that’s all we know how to use.

[@TKevinBlanc]

Because Freedom units are better. (Seriously, we all know the metric system makes more sense. It's just it would be nice to see all your gauges in the same measurement system. Unless you're British, Canadian, or Australian and are completely bi-unit.)

[@mikej1097]

7:06 man he's in big trouble if he cant even count.

[@Motiv8Labs]

Man nice catch!