Horsepower

Cat sdp · Feb 21, 2024

TripleSix said: ↑

He’s right. I made this mistake on mine. Factory setting was 475 with a big 13 (1850 torque). Had a 550 tune installed. EGTs ran too hot and I cooked the motor. Built the engine, bigger turbo, aftermarket exhaust manifold to drop the EGTs, switched to an 18 speed with 1850 torque, 650HP tune, custom clutch. Popped the intercooler, grenaded the transmission, and chunked the rears. Custom intercooler, big rad, RTLO22918B transmission. Digital pyrometer, axle temp gauges and transmission temp gauge.

If you want anything over 550, that transmission had better read 20918B minimum. 475-550HP, you can get away with an 1850. Besides, that 400HP setup probably has a low torque transmission and 38k axles. Grenade.

“But Six, I know a guy that ran a ______with a _____ and a ______ and he did just fine.”

I was that guy. Grenade, grenade, grenade and grenade. Ran just fine…until it grenaded. So what are you really saving? Absolutely nothing. The primary reason I bought the truck was because it had a 2WS engine, had the sleeper I wanted and set up to run in northern Canada. If you don’t any specialized plans and just want a rig that performs strong and gets decent economy, buy a truck with the factory setup for a 515 Detroit and put all your money back for maintenance.
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2050 factory all the way back with 46 rears with pump. Priceless

AriGab · Feb 21, 2024

201 said: ↑

Forgive ridgeline, they are one of our more outspoken chaps, all great advice, delivery a bit crude sometimes. Perhaps they are thinking you already bought the truck, but are actually asking advice before that. Good move. Today, 400hp is peanuts, typical of a fleet truck, and nothing less than 500 should be under the hood. Automatics suck up some hp, and while a 400 was good years ago with manuals, 500 should be the least. Now, what you want to do, is update an existing truck with more power. It's not the 80s, and that could be a major hassle. With so many trucks out there, just get the one you want, and get truckin'!!
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Unfortunately they do not have any trucks that have 500hp. That is why I'm asking.

AriGab · Feb 21, 2024

TripleSix said: ↑

He’s right. I made this mistake on mine. Factory setting was 475 with a big 13 (1850 torque). Had a 550 tune installed. EGTs ran too hot and I cooked the motor. Built the engine, bigger turbo, aftermarket exhaust manifold to drop the EGTs, switched to an 18 speed with 1850 torque, 650HP tune, custom clutch. Popped the intercooler, grenaded the transmission, and chunked the rears. Custom intercooler, big rad, RTLO22918B transmission. Digital pyrometer, axle temp gauges and transmission temp gauge.

If you want anything over 550, that transmission had better read 20918B minimum. 475-550HP, you can get away with an 1850. Besides, that 400HP setup probably has a low torque transmission and 38k axles. Grenade.

“But Six, I know a guy that ran a ______with a _____ and a ______ and he did just fine.”

I was that guy. Grenade, grenade, grenade and grenade. Ran just fine…until it grenaded. So what are you really saving? Absolutely nothing. The primary reason I bought the truck was because it had a 2WS engine, had the sleeper I wanted and set up to run in northern Canada. If you don’t any specialized plans and just want a rig that performs strong and gets decent economy, buy a truck with the factory setup for a 515 Detroit and put all your money back for maintenance.
Click to expand...

Thank you so much for that.

AriGab · Feb 21, 2024

tarmadilo said: ↑

Are you sure it’s an ISX and not an X-15? Our 2019 International LT trucks all came with the X-15.
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Yes you are correct. X15. My bad

DUNE-T · Feb 21, 2024

TripleSix said: ↑

He’s right. I made this mistake on mine. Factory setting was 475 with a big 13 (1850 torque). Had a 550 tune installed. EGTs ran too hot and I cooked the motor. Built the engine, bigger turbo, aftermarket exhaust manifold to drop the EGTs, switched to an 18 speed with 1850 torque, 650HP tune, custom clutch. Popped the intercooler, grenaded the transmission, and chunked the rears. Custom intercooler, big rad, RTLO22918B transmission. Digital pyrometer, axle temp gauges and transmission temp gauge.

If you want anything over 550, that transmission had better read 20918B minimum. 475-550HP, you can get away with an 1850. Besides, that 400HP setup probably has a low torque transmission and 38k axles. Grenade.

“But Six, I know a guy that ran a ______with a _____ and a ______ and he did just fine.”

I was that guy. Grenade, grenade, grenade and grenade. Ran just fine…until it grenaded. So what are you really saving? Absolutely nothing. The primary reason I bought the truck was because it had a 2WS engine, had the sleeper I wanted and set up to run in northern Canada. If you don’t any specialized plans and just want a rig that performs strong and gets decent economy, buy a truck with the factory setup for a 515 Detroit and put all your money back for maintenance.
Click to expand...

How heavy are you hauling? I do general dry van load board freight (all kinds of weight, mostly 20-40k) and I am one of those guys with 12.7 Detroit 570/1950 and factory 10 speed 1650 transmission.
The other truck is n14 525/1850 and 1850 transmission. About 200k miles on each truck with that power.
Also 1700 clutch in each and no tranny oil coolers. Will see how long they last lol

tarmadilo · Feb 21, 2024

I’m not up on technical details, but I will say that I drive a stock 2019 International LT with an X-15 Efficiency and a 10-speed Eaton manual transmission, and I often run right up close to 80k and it pulls just fine.

AriGab · Feb 21, 2024

tarmadilo said: ↑

I’m not up on technical details, but I will say that I drive a stock 2019 International LT with an X-15 Efficiency and a 10-speed Eaton manual transmission, and I often run right up close to 80k and it pulls just fine.
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The company I was working for had LT625 with 450hp not sure about torque but I know going up long hills it literally was 35mph every time. Sometimes drop to 33 or 34. I could almost run faster lol. I got so tired of everyone sailing by me and holding them up.

Magoo1968 · Feb 22, 2024

Many isx engines set at 400ish hp have the torque turned up to 1750/1850 ft/lbs .. I had 485hp 1650ft/lbs and my buddy had 410 hp 1850ft/lbs . On small hills I walked away on hard pulls he went by me ..

lester · Feb 22, 2024

DUNE-T said: ↑

How heavy are you hauling? I do general dry van load board freight (all kinds of weight, mostly 20-40k) and I am one of those guys with 12.7 Detroit 570/1950 and factory 10 speed 1650 transmission.
The other truck is n14 525/1850 and 1850 transmission. About 200k miles on each truck with that power.
Also 1700 clutch in each and no tranny oil coolers. Will see how long they last lol
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I ran a 700ish hp 6nz on a 18918b trans and 40k rears and beat the crap out of it and it never let me down. 86 to 92k loaded. mud, hills, snow, whatever

77fib77 · Feb 22, 2024

AriGab said: ↑

OK get out the popcorn lol. So I know no one likes Lone Mountain. If that is the only way I can go I have a few questions. They have 2019 international LT625 with ISX 15. Only 400 hp and no idea on torque. 300k + miles. It seems like it's in great shape. So if I want more power and torque can I beef it up or will the transmission not take it? How much more can I get? If not could I save up and drop a 565hp 1850tq in it? Or should I just wait until it doesn't go anymore and buy something new. Just thinking about not having payments.
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The engine has ratings for different components. You might have injectors that can only run up to 450hp. It's the weakest link. That maxes the horsepower in just using a computer to turn it up.

Imho opinion it will be cheaper to get a used truck rather than finance thru lone mountain. But if you have Shakey credit, it might be the better way.

The freight market hasn't bottomed yet. Truck prices haven't bottomed yet.

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