800 HP Marine Camshaft Swap - 14.6L Caterpillar 6NZ C-15 Diesel Engine - Peterbilt 379 EXHD

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Published 2019-08-16
Swapping out the stock 6NZ camshaft for the 10R7155 cam, better known as the 800 horsepower marine cam.

This was just an experiment to see for myself if I would find any immediately noticeable negative effects from running the 10R7155 cam with stock "57" injectors. This is an improper camshaft to injector combination, as I briefly explained in this video.

In the long run, this combination will cause accelerated internal injector wear, accelerated cam lobe and rocker arm/roller wear, and in some cases can eventually cause catastrophic gear train failure as it shakes the weights out of the cam gear due to increased vibration coming through the cam.

The 10R7155 camshaft properly matches to a "59" injector, which is a much higher flowing injector than a "57". There is very little to be gained by running this cam with "57s", and it will only cause problems in the long run.

Do not mistake this video as me telling anybody that this cam swap alone is an upgrade or something that you should do to increase performance. That is not and never was the intent of this video.

All Comments (21)
  • @funonutube100
    You are a breath of fresh air when it comes to quality of workmanship and attention to detail. Guys like you are rare as hens teeth theses days. No one gives a shit about the work they do or take pride in doing a good and proper job anymore. I salute you sir and would purchase and engine from you in a heartbeat!! RESPECT!!!!
  • This quarantine has me watching your videos and I don’t even own a Diesel engine. πŸ‘πŸ»
  • @xx3astmanxx928
    It's crazy seeing a complete engine in application. I've installed thousands of peanut covers, head cams, fuel injectors, rocker arms, and tri sensors in thousands of engines but I'm on a pretty early stage of assembly so I don't get to see the finished product unless I see one of our vehicles in the field
  • @zetacon4
    That engine sounds wonderful. I love hearing a diesel all tuned and running full power. It is a thing of beauty.
  • @TuffBurnOutTeam
    I'm from Australia 🌏 and I tell you all I learn a lot from this man I'm grateful he puts videos out there for us
  • @avega2792
    I love the sound of a CAT engine. Makes me miss my old driving days.
  • @robw5469
    The lack of service brakes makes me happy. Grew up in a canyon town and had to listen to the Jake brakes of all the log haulers coming down the hill into my town. Best lullaby ever. Thank you for the big rig content
  • @reggierico
    I have a friend who is an executive at CAT. He's a great guy, but I believe that hamstringing truckers, farmers, commercial fishermen, etc., with proprietary maintenance restrictions is what is driving many independents out of business. America was not built on those principles! It was built by guys like you, who are independents and scratch out a living by doing, learning and becoming experts at what they do. Do some independents buy black market (China) programs to help them with proprietary codes, passwords and such? Of course, but they have no choice if they want to remain profitable and independent in the first place. These codes, passwords, etc, should be part of the purchase price of the equipment and should be transferrable as well. An unforeseen consequence of this is guys keeping older equipment running for years/decades because they don't require the queertrons to fix a simple time critical maintenance issue.
  • @MrTruckerf
    I run a '99 Freightliner with a Cat engine. Had it since '03 and I will never replace it. 1.66 million miles (it had a half million on it when I got it). 8 mpg @ 55 mph. Overhauled at 1,231,000 miles. 435 hp. C-12. Yours sounded SO nice when you lit 'er up!
  • 6 in a row ready to tow. With a cat under the hood, life is good. Keep makin great vids man. And that cat dealer guy bobo can shove it
  • @georgegeorgepht
    This channel and adept ape pushed me over the edge I went out and got a western star and am rebuilding it now. Been planning on doing it for years. But watching these guys and reading many detriot service manuals gave me just enough wind in my sails to throw money at a project. Thanks for taking the time to put up these videos and explaining to us how these engines work.
  • @Grizzbiz57
    I'm an old tractor mechanic. Never worked on any Cat gear however I love the video. I really enjoyed the tailgate camera angle and listening to those two stacks choofing out puffs of coal. Cheers from Oz (Australia)
  • @exarkunn69
    Pretty cool putting the camera in the bed, no wind noise as well! I don't know the first thing about diesels but man, it does sound nice.
  • @iBackshift
    This is another channel with such good competent entertainment, its why I dont have TV anymore. I dont even own a truck (But i drive them for buddies sometimes) Great documentary.
  • When you hear THE turbo THROUGH THE EXHAUST IN THE BED AT FREEWAY SPEED...THAT BEAST IS BREATHING LIKE THE HULK!
  • @jbrummitt
    You are extremely skilled. Your calm confidence and honesty is what the world needs.
  • Good job mate, that engine bay and ancillaries are a credit to you. I always reckoned a real good bloke keeps his own gear well and you exemplified my theory. Informative video as ever, big fan of yours out here in Australia πŸ‡¦πŸ‡ΊπŸ‘ŒπŸ‘πŸ»
  • @200nick2
    Awesome videos. No over the top shots or explanations and no complicated setup. Easy to follow and easy to watch as well as to the point. Keep up the awesome work.
  • Love your Channel I'm a lifelong mechanic 64 years old worked on just about everything .>>really enjoy your videos couldn't exactly tell you why but I do ::::keep up the good work kid I've had to deal with these dudes supposed Factory experts who never spun wrench just remember that dude Bobo will be working at the parts counter till the day he dies trying to pass himself off as an expert he will end up retiring from Joe's Auto Parts with a f**** gold watch.>> gold plated