The whole Maxidyne engine was way ahead of its time. That bypass to drive the intercooling fan was leading. Even details were built like a Mack Truck.

Providing cool air to an intercooler using a bleed turbo air seems very effective and somewhat auto adjusting, depending on the engine load. I had no idea about this solution, pretty impressive. Thank you VisioRacer for another great vid. 👌👍

When I was a young teenager, I used to hang around a small trucking company... one of the trucks was a mid-70's blue Mack R600 model with this exact engine - I remember looking at the air to air cooler and trying to understand how it worked... the sound of that engine was amazing... once the engine started to load up, first the big turbo would spool up, and then shortly after the small turbo would spool up with a higher pitch whine... still gives me shivers when I think about how cool that engine sounded! Great video - thanks!

Please do more videos on old workhorse trucks and their powerplants!! I love 60's to 80's North American and Soviet/Eastern European trucks and the different routes they took to power them

@user-xg8yy7yl1d

9 ай бұрын

If you want some unique 60s to 80s North American trucks the British Columbia "supersize" logging trucks like Pacifics and even more obscure one offs might be of interest in looking at.

@Joe_Bidens_hair_fetish

9 ай бұрын

@@user-xg8yy7yl1d Yupp I'm very familiar with Pacific, The p16 is one of my favorite trucks. Idk if you knew this but the guys that started Pacific used to work for Hayes Manufacturing and made Hayes trucks and those were some bada$$ trucks!

Mack had a significant impact on my dad when a dump truck they built ran him over as a kid back in the 70s. he survived, nearly lost his arm, and the whole family still ribs him almost 50 years later whenever they see an old Mack truck going around.

I helped my grandfather twist a camshaft into the v8 maxidyne in the early 90s. By then it was a million mile engine from the 60s.

Thank you. The R series Macks do have a good look and a strong working history. We actually had an R series tipper in our Engineering Squadron for a while. Nice to see several NZ shots,including the first clip. I suspect that the second clip came from a documentary about the construction of the Cold War DEW system in Northern Canada and Alaska.

Love those Tip Turbines! I've had the pleasure of running one, at a factory 350hp (that was turned up about 6%), coupled to a Maxitorque 12spd. Running 100-120k daily is not a problem, & still gave me almost 6mpg average. Love my Macks!

@deborahchesser7375

3 ай бұрын

They are built to be abused, like you said, 100-120k daily no problem. And off-road nothing held up like a Mack especially the DM’s I hauled coal in the SE Ky mountains and went places you wouldn’t think a dirt bike could go. 🐾✌️🇺🇸

The R-series (especially offset cabs) is the quintessential work truck in my eyes. The mammoth radiator screamed heavy-duty compared to W900s or narrow-nose Petes

@CharredSteak

9 ай бұрын

Yeah one of the most unfortunate falls in the trucking industry. Macks were exactly that up until Volvo watered everything down. Very similar to what happened to western star under Daimler

@_..-.._..-.._

9 ай бұрын

@@CharredSteakremember when Daimler tried to sell badge engineered Dodge Ram 4500 & 5500 trucks at Western Star dealerships under the Sterling name? That was a weird move.

@CharredSteak

9 ай бұрын

@@_..-.._..-.._ Yeah all of the sterling rebadges were weird, especially when the brand itself wasn't all that good. Shame what they turned the Ford L series into as well

@goosenotmaverick1156

9 ай бұрын

​@@_..-.._..-.._you couldn't be more right, that was weird. Don't see too many of them floating around these days though

@Joe_Bidens_hair_fetish

9 ай бұрын

Those were badass. The best offset cab work trucks in my opinion will probably always be the old Pacific logging trucks like the p16

What a cool (no pun intended) concept! I had no idea that these existed, but I REALLY miss the days when trucks sounded like these, and of course the beloved Detroits.

I remember when my dad worked there from the early to late 60's. He ran the design team that came up with the maxidyne engine.

@ollimatik

9 ай бұрын

Wow... really cool that your dad worked there!

That’s pretty impressive technology for so many years ago.. true engineering! Unfortunately very few Mack’s in my country but once in a blue moon I see one that looks like it’s lived a very hard life, still pulling like a train!

Awesome!!! Thanks for making this!!! I suggested a few weeks ago. I recently saw one in the scrapyard and had to look at it for 15 minutes to figure out what it was and how it worked. The one I saw was made by Garrett.

Visio for the win again I love the combination of information and footage. This channel is brilliant

@fidelcatsro6948

9 ай бұрын

my cat loves u too! 🐱♥️♥️♥️

@VisioRacer

9 ай бұрын

Thank you 🫡

Decades ago Mack and other truck manufactures used air-to-air inter-coolers with it being placed in front of the radiator. Thanks for video explaining the even earlier Mack technology.

@andrewking4885

8 күн бұрын

Correct and that's the way most trucks are today. This is the first video I've watched about this model engine. This the 285hp version after the 237 I think.

That explains the duel pipes from the airbox I have wondered about before on the old macks

I love old trucks, old school tech and all kinds of engineering, your videos always have something interesting

Love the content @VISIORACER. I would definitely watch long format as well. Thank you for the videos

@VisioRacer

9 ай бұрын

Thank you!

They made a cool sound! Mack has always been an innovator in the truck world. Hi torque at low rpms, air to air intercooling, cab and sleeper as one unit, air ride cab..

Awesome!! I lived it all!! Thanks for cleanin out the cobwebs!!

I like how you included the power and torque curves for these engine! They were an excellent addition to this interesting and informative video.

@VisioRacer

9 ай бұрын

I enjoy using the vintage and original pictures and documentation if it exists!

@c.a.r.s.carsandrelevantspecs

9 ай бұрын

@@VisioRacer Very nice! I appreciate your excellent work! 🙂👍

@mrspandel5737

9 ай бұрын

The Torque curves were what set the Maxidyne apart from other engines of its time. 1100ft-lbs/1400Nm from an 11L I6 was impressive stuff in the early 1970s.

@c.a.r.s.carsandrelevantspecs

9 ай бұрын

@@mrspandel5737 Very nice! 🙂👍

In the late 50's, Scania pitched an offer to Mack for an intellectual property trade, (We Scania like your Mack bus, but your Mack engine does not have enough power to get out of its own way.) Lets trade "Mack bus" to Sweden for "Scania cylinder head", (We'll build you a cylinder head that will make your engine pull) which Scania built the first 15000 thermodyne cylinder heads for mack. There are Macks [you can see them at ATHS rallies] that have the Scania-Vabis cast into the thermodyne cylinder head. The 1100 rpms that a small little Mack 350 and 400 hp engine can pull at, is because Scania designed the cylinder head to pull like that. [I used to drive an R600 w/a 350hp and was taught to pull it on the hills at 1100] Scania put to the drawing board the first V-8 in 1964 and entered into service in 1969, the 14liter 350hp. Scania designed the V-8 engine and did an "Resource" property trade with Mack. Mack had the casting facility and cast the two blocks, one Scania and other Mack. One was standard (mack), one was metric (Scania).

@bernardkinsky1637

8 күн бұрын

I had an old oshkosh with a cat 1674,but the macks could pull away from the caton a long pass up hill.

Nothing sounds like a Mack. Add the air start and it’s the beginning of a symphony

What an era for diesel tech. And seeing this, shows how much trickle down tech from (and before) WW2 was making its way into the civilian world. Turbocharging and intercooling/aftercooling tech evolved so rapidly back then.

Te tip turbine "Coolpower" equipped Macks are easy to spot, they always had twin air cleaner intakes. One air cleaner supplied clean air to the tip turbine, the other supplied the engine air intake. The issue that happened frequently, was that if the engine coolant was not correctly maintained with anti-electrolysis additive.....the coolant passage would eat through the large and expensive air-to-air intercooler housing. On the road the 6 cylinder performed very well compared to contemporaries. However by the late 1980's, Mack released the front chassis mounted, air to air cooled 350hp engine with the 4 valve head.....and did away with the tip turbine concept. The 350hp engine was really strong, super reliable and could easily keep up with a 400hp Cummins or the 400hp V8 Mack engine of the same era, and was regarded as a "freak" engine for how good it was, even in high load factor applications like 80 ton road trains.

Thats really interesting. I've never heard of this intercoolering solution before. Fantastic video. Jeep them coming

@VisioRacer

9 ай бұрын

Thanks!

I grew up working on these in the late 80s. Great trucks!

What a lot of people forget, that the ENDT-675 was a shared design with the Scania D11 and DS11, and the ENDT 865 was the same as the Scania DS14, Scania and Mack did work together in that time, and shared engine design, in 1962 Scania took the ENDT 864, and did a redesign of it, Mack did the same thing and in 1969 when Scania released the DS14 , Mack released the ENDT 865, both bassicly being the same, with some minnor tweaks Scania also build the END()T 475 and ET(Z)477, those where shipped from Sweden to the US and put in to Mack trucks.

@mrspandel5737

9 ай бұрын

True, but the Scania and Mack engines do differ quite a bit, especially the V8. The cylinder heads are a completely different design for one, Scania with an individual head for each cylinder and its iconic V-shaped Valve covers, while on the Mack 864 every two cylinders share a head. Effectively the only thing that was truly the same were the engine blocks. Mercedes-Benz and MAN in germany had a similar arrangement with shared engine blocks but unique cylinder heads and fuel system. At M-B this would become the OM400 series of V6, V8, V10 and even a V12 for special applications used from ~1970 to 2010 ish. There was interestingly also an Inline 6 built on the same architecture for some models. MAN didn't bother with the V6 and V8, thus only used the Inline 6 but with Turbocharging years before MB adopted it and the V10 that produced up to 660hp in its final evolution in the TGA series.

An absolutely fantastic video! I gotta give kudos especially for including details on the tip turbine itself as it's not to easy to come across information on it like the number of blades on the turbine.

These videos are excellent. Resource library quality.

@VisioRacer

9 ай бұрын

Thank you!

Ohh, Mack's sounds so good, would love to have one in my boat 😮😊

Nice opening scene in New Zealand! Tuapeka Transport based in Lawrence near Dunedin at the bottom of the South Island.

I still have 6 Mack trucks from their Golden days (two e9 Superliner)

I operated a 1978, 65 ton Kato hydraulic crane mounted on a tri steer Mack chassis in Australia. It would flatstick the boom fully extended (36 metres)!…it’s also the reason that I’m half deaf because it was bloody loud!

Drove several Macks of that era and loved 'em! Wish they still made trucks like that. Wonder in the guy at the end made it out OK.

A video about Mack trucks and you don't mention the unique compressed air starter. Such an iconic unique sound

@paradiselost9946

9 ай бұрын

he didnt mention the significance of the dog on the front either... or more importantly, why only ONE was GOLD. which is particularly ironic when the video is about the mack ENGINE...

The 285 Maxidyne punched above its weight. The low end torque was impressive

@andrewking4885

9 ай бұрын

I've seen a picture of an R Model with that engine pulling 3 three livestock trailers in Australia.

Mack was always an innovator. The high torque rise low rpm setup gave great pulling power and excellent fuel economy along with long life. My Dad was a pure Mack guy and when I was looking to buy my first truck he said “ buy a Mack - if you can’t make a living with it, find something else to do”!! The tip turbo was great until one came apart and fragged everything under the hood or the cab. A buddy had one come apart on a 350hp Cruiseliner with his girlfriend in the right seat - she didn’t get hurt but was NOT happy with that Bulldog!

Amazing, how you get to know those details. Thank you ! I thought, I did know something about piston engines. However, again and again I notice that are many things I did not know.

@VisioRacer

9 ай бұрын

Thanks!

Wow the Bulldog Company built a two stage turbo diesel that worked with a novel bleed air cooling system for the intercooler. The 'R' Series Bulldog is my all time favorate Mack, it is soo cool and so right, not keen on the trilex wheels.

What Volvo did to Mack was criminal. Wish I could still get a real mack today!

@100pyatt

9 ай бұрын

It's still Mack and built at Mack in Hagerstown MD. The crime is what they did to the cheap azz body they're putting on the trucks now .. total cheap plastic junk

@robwhite3241

9 ай бұрын

@@100pyatt The last true Mack engine ended production in 2007. Most of the body and engine components are now sourced only from Volvo.

A fun fact that was what the R model tractor was running in the movie the road warrior.

I work in calgary alberta 1989 at inland cement we have one biggest fleet mack truck in town.mack ho pick up maxi dyne engine over 1 millions miles and give us new one in return.the v-8 on superliner they take some photo and photocopier of maintenance on truck and engine.mack engine was tough hard to beat over other brand.😊

You cover everything, my friend! Great job

@paradiselost9946

9 ай бұрын

except for one thing...why did i only see one GOLD dog in this video? it has a particular significance, considering the content...

I'm left hanging! I wanted to see if that guy at the end made it out! It looked he was going to, but it would have been cool to see him make it. ;)

@Lawdagreat

9 ай бұрын

He did.. and what a sight it was good driver behind the wheel too. The excitement of watching that Mack bog down to almost a stall, then slowly the turbo lights and she wipes her feet and walks right on through!!!!

I learned very early in life (as a child in the 1970’s) that peak hp was not the be all end all performance metric. My dad explained to me how his CB buddy’s 237 hp Maxidyne could give his 318 hp Detroit a run for its money because the Mack had more of this thing called torque.

@dougthompson1598

9 ай бұрын

Horsepower is how fast you can hit the wall, torque is how far you can move the wall.

They had the cool bulldog on the front too. Great vid.

A real clever solution this turbine. Macks were the real earth movers and construction trucks. in the 1970s and '80s it was the only US truck you would see doing proper work in the Netherlands, Pete's and Internationals you would only ever see at truck shows as they had their visual appeal but were somewhat outdated compared with the European trucks of the time and didn't fit well into the length restriction rules we have here limiting the length of the whole combination and thus limiting the size of the cargo hold when there is such a long tractor unit on the front. The Macks as rugged as they were operated well as dump trucks and cement mixers, where due to the density of the load the length restriction played no role.

“They call me Mack, with a face like a truck, I am unstoppable, so don’t press your luck…”

Good morning and I have been patiently waiting for you to get a video ready! Great day to you and enjoy it the best you can Video was great as always.

@VisioRacer

9 ай бұрын

Thanks!

A too common forgot is for cooling fins, in Air Cooled engines, or for the Radiator, in Liquid Cooled engines, Blown Air works much better than Aspirated Air, the usual approach with a belt driven fan. Electric fans in front of Radiator, thermostat controlled, became standard in many cars. But an electric engine costs money. With a hole in center of Radiator, leaving room for a shaft moving the fan in front of Radiator, you could probably have improvements in engine cooling, and a lower power taken from engine by the fan. A fan turning behind Radiator works on hot, less dense air, thus its efficiency is lower; a fan in front of Radiator has advantages, and is not necessarily more costly or failure prone. Someone willing to test this?

Another one of your great work

I drool over an old R-model mack....

Drove several 300+ trucks. Even with only a 5 spd they could haul over 180k pounds at highway speeds.

Thanks again

Very clever!

Overbuilt and underrated, that’s Mack. I hauled a lot of coal in an ol DM 237

I do see some of them in farming and a well drilling company still have theirs.

I love this channel.

Thank you

the very best truck hands down best dump truck in the world if u could remake that truck u could outsell everybody

Mack Attack!😎👍

DAF already had an intercooler in 1972, DAF DKS engine

i learned how to drive a manual transmission in a 85' Mack R-Model with a maxidyne an it had a 13 speed, i drove the truck at the age of 14 from my father wanting me to be able to help him with his work so i had to learn to drive a truck, an that was the truck i got to learn on.

Nice mack

Beats the heck out of Cummins low flow cooling systems they used for a few years to increase horsepower..

R model macks are the "truck" we all imagine in our heads. Legendary trucks, pure work horses

I love you

@fidelcatsro6948

9 ай бұрын

my cat loves u too! 🐱♥️♥️♥️

Tesla electric trucks left the chat...

@paradiselost9946

9 ай бұрын

left? it never even figured out how to register, let alone log in.

I’ve driven one but can’t say anything nice about them.the one thing they could do is leak oil lol.dt466 is actually worth talking about

Mack has not been the same since Renault Véhicules Industriels acquired them

they would run forever.they didnt have enough power to harm themselves.i drove a 70 f model.237 5 speed.with a 44k lb load in the trailer id climb mountains on the interstate at 15 to 20 mph.i was actually a road hazzard to trucks with 290 cummins of the time.i call BS on macks claims.

✋🏼🇦🇺👍🏼

Mack

I wouldn't say it was ahead of its time - what does that even mean? It was just a technology used for a few years and then dropped. Used to drive R models with these engines, it was a good idea but a regular intercooler in front of the radiator is better due to no moving parts. Quieter too without the tip turbine noise

@robwhite3241

9 ай бұрын

Cummins or Cat didn't have any sort of air to air cooling until 10 years after Mack so I'd say it was ahead of it's time. It does seem over complicated but maybe they had some sort of marine use in mind.

1:49 2:47 Those graphs are impossible.

Mack still builds the best truck engines on the market, nobody comes close and Cummins is about a joke anymore with the X-15 and older ISX poorly machined trash blocks

@thermidorlevrai65

5 ай бұрын

newer mack are just volvo

Oh wow I'm the first to comment. Love your videos buddy keep up the work

@VisioRacer

9 ай бұрын

My pleasure, thanks!

It was an ingenuous design. But it was still a turd for pulling power. Due to its 8 speed transmission. Mack had triple countershaft transmissions, very beefy though. They also had air shift reverse.

Save iterculler frio aire frio motor cojesmas pinche estspor probsdo iterculersorpedredete turbo alimetacsvallajes

firtst!

@fidelcatsro6948

9 ай бұрын

congratulations! 🐱👍🏿

@_..-.._..-.._

9 ай бұрын

You’re third. 🥉

@gavendb

9 ай бұрын

@@_..-.._..-.._ as with everything else

This is a Scania engines 😂

@justinmartin8887

9 ай бұрын

No it’s not. Mack did import some small economy cab over Scania trucks and relabeled them. I’ve worked on a few of them over the years and there’s no remote relation between those “mutts” as people called them; and the real Mack trucks of the 80s and 90s

@PauloCosta-ji8kt

9 ай бұрын

@@justinmartin8887 do you work what? As cilindrada são iguais Os blocos são iguais A arquitetura é igual Na Europa também existe mack Renault e Scania 🤠 Por acaso já consertou um motor Scania 🤠 Traduz 🤩

@V8Lenny

9 ай бұрын

​@@justinmartin8887yes it is, or sister to Scania 11 liter, same basic design.

lol water to air coolers are total shit

Before Volvo garbage 🗑️

What's sad about today Mack trucks is that the biggest and most powerful ones are not made and sold in the US, but Australia 🦘 The most prominent Mack truck is also not featured in Hollywood, but Australian movie too 🇦🇺 Addendum: If anyone wonders why does it read "EARTH" on the driver's side door, it is because on the message that was sprayed in yellow paint on the trailer's tarp reeds: "VERMIN HAS INHERITED THE". Since the trailer didn't had enough space for the whole text, EARTH was sprayed on the door🌈

@PaulG.x

9 ай бұрын

That probably applies to other brands too. Australia has requirements not seen in other countries: Road Trains , extreme temperatures and unsealed roads. So they need high power outputs , upgraded cooling systems and heavy duty chassis. No company is going to supply those extras unless the market needs them.

@JustPeasant

9 ай бұрын

@@PaulG.x Volvo Group has made Mack a second tier company so they could prop up their own VN line. Volvo trucks North America has option of D11, D12, D13 & D16 engines with 9, 10, 13 & 18 gears. The most powerful Mack that is available is with mp7 (11L) or mp8 (13L) engines. Everything else in it's range are vocational trucks (construction & refuse). Compared not only to Volvo, but competitors from PACCAR Group, Daimler Trucks North America and Navistar International is meak😢

@SootyMangabey.

9 ай бұрын

Mack had the mp10 in Titan trucks for several years. Company I worked for had one They were not too popular though.

@JustPeasant

9 ай бұрын

@@SootyMangabey. Naturally. The logistics companies want uniformed fleet for ease of maintenance. That means: Cummins engine, Eaton-Fuller transmission, Meritor axels & suspension. Kenworth, Peterbilt, Western Star, Freightliner, International, Volvo North America, are all the same underneath the bonnet (hood in USA). Unlike Mack, it's just bodywork on the rolling chassis that is different☹

@SootyMangabey.

9 ай бұрын

@@JustPeasant well what really killed them off was the mp10 was only available in the Titan and the Titan was only available in heavy spec day cab, with no sleeper option. That's a very limited market. They were way over speced for 90% of the market here. No point in having a Titan when a Granite or Pinnacle with a mp8 could do the same job cheaper.