The IMPOSSIBLE MASERATI 6 Valve Engine - The 6.36

What is up engine heads! Today we're doing a bit of time travel! Why? Because I want to tell you a really interesting story about Maserati, and their incredible 6 valve engine from the 80s.
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Our Journey starts in 1975. Why in 1975? Because that's when Argentinian entrepreneur Alejandro De Tomaso, yes, that De Tomaso, the one that founded the DeTomaso car company that would eventually make the Detomaso Pantera, the Detomaso Mangusta and other seriously cool cars. In 1975 Alejandro de Tomaso was living in Italy instead of his home country of Argentina, because in 1955 he forced to flee his country after being implicated in a plot to overthrow Argentinian president Juan Peron.
After arriving in Italy Alejandro De Tomasso became Alessandro de Tomaso, he worked as a mechanic, then a race car driver, and then using money from his wife's wealthy relatives he went on a shopping spree and bought out coach builders Ghia and Vignale, motorcycle makers Moto Guzzi and Benelli and car and scooter maker Innocenti.
But his most famous purchase happened in 1975, when he managed to convince the Italian government to help him rescue Maserati from bankruptcy. In 1975 Maserati was owned by Citroen, who were also undergoing financial struggles at the time, so with support and funds from the Italian government De Tomaso bought Maserati from Ctiroen in 1975 and immediately set out to transform the company.
De Tomaso's plan was to bring Italian luxury to the masses, and make make cars that were more affordable and produced in larger volume than the cars Maserati was making under Citroen, such as the Maserati Bora or the Maserati Khamsin.
And in 1982 his plan was materialized with the launch of the Maserati Biturbo. The first mass produced twin turbo-charged car in the world. A car that cost half as much as previous Maserati models and aimed to compete with BMW and Mercedes coupes and sport sedans.
And although some may not like the styling of the Biturbo it featured a very clever engine for the time. And it had to be clever, because at that time Italy heavily taxed any cars with engines larger than 2.0 liters. So Maserati had to make a 2 liter or smaller engine but still make the power expected from a luxury sports car. So what they came up with was a pretty revolutionary engine for the time. It was an all aluminum 2.0L SOHC V-6, with Nikasil coated wet-sleeves and twin oil cooled IHI turbos. BTW IHI stands for Ishikawajima-Harima Heavy Industries, and it's a Japanese company that in addition to turbos also makes suspension bridges and ships. The turbos were installed one on each bank of cylinders and were pretty small. Small turbos were chosen so they could spool up quickly and prevent the dreaded massive turbo lag that plagued many turbo cars from the 80s.
But despite this, the engine made 180 hp from just 2.0 liters and propelled the BiTurbo to 100 km/h in just 6.5 seconds. Pretty impressive for 1982.
And while time would show that the initial carbureted Maserati Biturbo cars would be plagued by many reliability problems, the car was a business and sales success. With almost 40.000 Biturbos sold throughout the years, generating the much needed profit to save Maserati from bankruptcy.
DeTomaso succeeded in his plan, but he wasn't satisfied yet. The newly acquired profits meant Maserati could go invest into some R&D and show off to the world what they're capable off by further developing the tiny little v6 engine.
The 2.0 liter Biturbo engine had three valves per cylinder. 2 intake and 1 exhaust, and this wasn't enough. If you wanted to be on top of the performance game in the 80s you needed 4 valves per cylinder. But DeTomaso wasn't a man of small appetites, he wasn't just going to increase his valve count by 1, so he decided to skip a few engine evolution stages and instructed engineers to start working on something truly incredible. A six valve cylinder head. He even one upped Yamaha's craziness of their 5 valve FZ750 super-bike that they introduced in 1984.
So 1985 a late 1985 press release titled "Hi-Tech News," the Maserati 6.36 engine was a 2.0-liter 36-valve V6 set to hit the road in a two-seat sports car in just a few years time. The press release got everyone excited but after some time passed....nothing. Silence. Nobody ever heard anything about the 6 valve from Maserati again.
Why? What happened, why did they never make this truly incredible engine? Well, for that answer you'll have to watch the video :)
A very special thank you to my Patron:
Daniel
and maserati-alfieri.co.uk/ for maintaining an incredible website full of amazing information on the 6.36 and everything else Maserati
driving 4 answers is part of the Amazon Associates program.
#d4a #maserati #6.36

[@d4a]

Support d4a: driving-4-answers-shop.fourthwall.com/ All Maserati cars: amzn.to/3cnit3t Authentic Maserati keychain: amzn.to/2WlmGz9 Maserati travel mug: amzn.to/3fH3tzM The Evolution of Style: amzn.to/3fEXxH9 D4A merch: teespring.com/en-GB/d4a-merch Patreon: www.patreon.com/d4a

[@PushyPawn]

3:27 Your engine diagram is WRONG. Inter coolers reside downstream of the turbo(s) not upstream.

[@fastinradfordable]

I just wanna say that even if the diagram doesn’t match up perfectly this is a great video. These videos are quite enjoyable! They have come a long way.

[@davidhollenshead4892]

a) Maserati makes garbage. b) The De Tomaso Pantera was better than most Italian cars due to having a simple reliable American high-performance engine. c) Maserati would have been better off focusing on making a competent & reliable sedan if that was the market they sought, rather than making garbage like the bi-turbo. d) If Maserati wanted to make an Italian high-performance car, they should have paid attention to what Alfa Romeo was making, as some of their cars were examples of good design & other examples of very bad design.

[@highlanderfreelancer4553]

Honda motorcycles also built a 6 valve head around that time not as good as 4 valves is what they found.

[@John-86]

Audi 1.8t is a 5 valve and when that timing belt breaks that timing belt u need to remove the entire front end to change you’ll be changing all 20 valves

[@reistje]

A small displacement, twin turbo, quad cam, 36valve, carburetor fed V6, made in Italy. That sounds like the most scary engine combination ever.

[@kusugara]

Italian bomb

[@renz1013]

@@kusugara more like a top tear Mario kart

[@5naxalotl]

this video is the first time i ever heard anybody say anything good about the biturbo engine

[@justawhitenigga]

I think the worst cars are from UK.

[@greebj]

fuel injected would be worse than carb, because then you'd also have electrics built by an ambitious cash strapped Italian carbuilder

[@Boredoutofmywits]

Turbos were so exoctic and modern in the early 80's. "Biturbo" was the coolest name for a car you could imagine.

[@ilbonc]

Unfortunately Biturbos turned out to be rust buckets.

[@AnonyMous-gt8vq]

Actually this was only in the car world. Some WW2 war planes already had advanced engine technologies such as electronic fuel injection, turbo charging, super charging including sequential systems with turbo super charging and sequential twin turbo. It took 30- 40 years after the war for this technology to become available for us plebs.

[@Boredoutofmywits]

@@AnonyMous-gt8vq I call it bullshit to airplanes in WW2 having ELECTRONIC fuel injection. They had mechanical one, being in use since 1906, but mechanical fuel injection is an niche technology in petrol cars, (Diesel engines use ir since the 20's) the carburetor is just a better option for most applicarions. First use of EFI was in cars; in the 50's, even if it didn't really took of until the 80's. Superchargers were uses in car racing since the 20's and were commonplace in F1 before ww2, desappearing after the war due regulations. Turbocharging was indeed the technology mostly associated to the aircraft industry until the seventies. Turbocharged diesel trucks were built in Switzerland just before WW2, though.

[@AnonyMous-gt8vq]

@@Boredoutofmywits Indeed, you are correct sir. Fuel injections was mechanical in WW2. I would recommend to to anyone who is interested in the topic to check out the channel Greg's Airplanes and Automobiles. He goes over various WW2 planes and cars over the war in exhaustive detail. His videos are well sourced with mostly primary sources and secondary sources if primary are not available. A greats resource for learning about this stuff.

[@VeggiePower303]

True

[@Module79L]

Yamaha did their homework very well, since their 20 valve engines had a pretty successful 22 year run. : )

[@southjerseysound7340]

The VW 20v was pretty stout too. I've had my 2001 Audi A4 for 16 years now. I turned it into a S4 clone but kept the 1.8 20v. it's almost stock internally except for Pauter rods and Schrick cams and supertech valvetrain. It's got a cast stainless manifold,tial v band hot side housing on a GT 35R. It's put down a hair over 500 to all 4 wheels since about 2007 and ran well in the 10's on street tires and pump gas with a shot of meth injection. I recently pulled it apart to freshen it up and put a twin disc clutch and a 6spd swap. When I pulled the bottom end apart it was mint. I could've reused the bearings after close to 90k miles at around 400-450 crank hp in street trim. It's crazy how stout the thing is. But I bumped it up to 2L with new hardware and mahle pistons, newer turbo with a billet wheel and it a lot faster and quicker to spool. So hopefully I have a clutch to hold 600+ AWD 😲

[@danieldimitri6133]

If the trend of long stroke under square engines keeps going 5 valves could make a comeback. I imagine the trend back to 4 valves has to do with decreased Rev range and increased torque. The 4 valve setup is likely cheaper and is easier to engineer for some kind of coherent motion of the intake charge like a tumble or swirl motion. But it's also being found that long stroke small bore engines are thermodynamically more efficient. Be it by a smaller swirl or tumble radius or just better surface to volume ratios at the crank angles that are important. Not sure if it's a burn thing or a heat dissipation thing. But new engines may push the stroke up near 100mm and have bores in the low 80mm range. If these limits are pushed then a 5 valve setup could be used to bring the valve area to cylinder volume ratio back up. I just have to wonder if the return on airflow is worth the smaller bore or if 4 valves with slightly more bore is the better compromise.

[@MrTarmonbarry]

I used to work on one of those that was used as a race bike , pro stock. Never forget spending two weeks painstakinly rebuilding it and going to Brands Hatch . Out went Andy for practice laps, came back in and i retentioned the new drive chain . Off he went agin for more practice laps , ten i saw him coasting , he came to the tunnel to go back to the pits and i could hear this tinkling noise , yes , the valves , oh how i hated that engibe ))))))))) , owo1 , still have nightmares about that one ))))))

[@stevenyoung3360]

Their motors in the Ford Taurus SHO were great motors. Silky smooth and reved like anything.

[@stephenbrookes7268]

As turbos are now more effective at lower engine revs, 4 valves are enough. There has to be a playoff on road vehicles of reliability/durability over performance. Along with fuel consumption now being an almost overriding factor. When we consider the amazing performance of the tiny engines now being used it does seem that this level of exotic valve gear is becoming redundant. I prefer the keep it simple ethos, but would much rather have an effective variable valve timing than bigger valve area, as this will produce less peaky power and torque curves. I love high torque engines, like the L5 2.4 turbo diesel in one of my Alfas. Although I have cars with smaller engines producing more bhp or Kw but fewer NM, I prefer the feel of the high torque diesel. I am going for smaller engines all the time as the benefits cost wise make a lot of sense and the performance is not suffering. There has to be something said about the exhaust note of a well tuned multivalve V6 Busson 3.2. I never put the radio on as the sounds coming from both engine and exhaust are symphonic.

[@KarriKoivusalo]

I remember seeing articles about the Maserati 6-valve head as a kid in the eighties, and nothing ever since. It's great to have closure on the subject.

[@chrisnarozny2612]

For the record, there was a range of large diesel engines developed by Maybach of Germany (now MTU) with 6-valve heads. They were built under licence in various countries and found use in numerous rail applications - one of the best known was the MD655 V12 that developed 1300+ hp from 65 litres, and was used in pairs to drive the UK's Class 52 locomotives.

[@johnmichael1594]

well, Yamaha's "analysis" of total air flow vs number of valves was less than rigorous. they failed to account for the overall bore of the engine, or at least d4a failed to mention it in the context of this video. as the total surface area of the head chamber increases, the optimum number of valves also changes. for much larger heads, more valves would continue to improve total air flow beyond even six.

[@Tom-Lahaye]

This was what came into my head immediately too, I've actually done some work on these engines, and they were designed some 35 years before Maserati came up with their version. But they may have been the only company trying this in a car engine, because an MD655 or MD870 are the size of a minivan themselves and weigh about 4 times as much as that van. The MD870 is a V-16 DOHC engine. in which each cam shaft does not only operate 3 valves per cylinder each, but one of the cam shafts has to operate the injector valves in the cylinder heads as well, talking about a complex design.

[@johnmichael1594]

@@Tom-Lahaye yay for mechanical injection. my old alfa has the SPICA mechanical fuel injection. balls to the wall 2L/4cyl engine.

[@oldengines9029]

Maybach Motorenbau started with this in the early 1950s, and the engine continued on well into the mtu era, and the last iteration of this engine was the 20 V 538 TB -03, that made 5600 Hp at 1900 rpm, and the displacement was 107,5 Liter

[@DC-rn1fc]

@Lassi Kinnunen Exactly! + on top of that, for a very small bore, twovalve heads are better than fourvalve, because the difference between valve diameter and the inner diameter of the port is, more or less, unchangable (at least within the car/bike scale you can assume a constant difference within likewise designed ports), so the ratio of valve diameter to flow area worsens with smaller valves. But this only goes down from 5 valves per cylinder, and only in small engines. The airflow-optimal number goes from 2 to 5, and then remains there. The thermal and mechanical stress the valve is to endure may play a role in big engines with even more valves.

[@tonychavez2083]

I owned a 1990 Maserati 430 S sedan with one of the final iterations of their V6 now at 2.8L I was very well versed in all things Maserati but never knew of a 6 valve head being developed. Great video thanks for the info 👍

[@donaldasayers]

"Crazy aspirations" very clever. VAG used a five valve head for many years and don't forget the Honda 8 valve engine but that had an oval piston.

[@edim108]

The 1.8 Turbo is probably the best known 5 Valve engine. It can take STUPID amounts of abuse and handles a lot of power on stock internals.

[@JOutterbridge]

@@edim108 Yup, a nice engine. Sadly this entertaining video didn't end the way I wanted but it was still great

[@antonfloor344]

Those where the days

[@foxy126pl6]

@@edim108 when i think 5v/c i think 4A-GE 20V

[@gordonlawrence1448]

There was also a completely bonkers NR750. Mind boggling price mind boggling performance for it's day.

[@maximilianjankowski]

0:44 you are enjoying the greenscreen much XD 10/10

[@d4a]

Hahahah I'm milking it dry

[@bbkmm1]

1985 prediction: by year 2000, flying car engines will have 80 valves per cylinder. How did people live with only 6 valves per cylinder? 2020 prediction: by year 2030, all mobile phones will have 80 cameras. How did people live with only 3 camera on their phone?

[@brandonobaza8610]

"Did you know this camera has a phone?" "A _what?"_

[@razor1uk610]

...in the old days some of the crazier cultural & religious (cultigious/religultral) pedo people used to mutilate parts of their infant childrens genitals, or force it to be done by certain 'ages' in their life/lives for 'because reasons'.

[@VolkerHett]

And where is my 24 blade razor? Gillette, are you listening?

[@erika002]

@@razor1uk610 dude wtf

[@gummansgubbe6225]

2020: I only want two valves per cylinder. "It sounds better"

[@zfloz9895]

Hei ! Check out the 8 valves per cylinder production engine, from Honda NR750!

[@georgegherghinescu]

I was thinking about the same thing hehe

[@delahayenator]

But that’s cheating 😁

[@maneki9neko]

That had two connecting rods per cylinder, and the pistons were oval. The 'cylinders' were not cylindrical and the number of valves per connecting rod was four. Interesting example to be sure, but not really a contradiction to the idea that six valves per cylinder are less efficient than five or four, when the 'cylinders' are round.

[@ZIGZAG12345]

I'm positive there was a later Ghibli Cup version still with a 2.0 V6 which made 330bhp, which was a pretty big deal for a roadcar at that time.

[@JViello]

I think Joe Walsh did more to sell Maserati's than any press of a 6 valve engine. LOL Another excellent video...made me reach into my "way back" memory in regard to valve count and head flow. I almost forgot about that 5 valve threshold in regard to CFM and port area!

[@Shaun.Stephens]

"My Maserati does one eighty five, I lost my licence now I don't drive..." Now I can't get that song out of my head '(Life's been good').

[@juanpaVlz]

This gave me anxiety because of the complexity and over engineering required to produce this engine

[@GIGABACHI]

Tis the GUUD kind of anxiety, the over engineered one. 👌🏻😁👍🏻

[@fastinradfordable]

I imagine the mechanics had anxiety as well. Although I have yet to meet an honest mechanic who isn’t anxious.

[@fastinradfordable]

Another note, this engine is simpler than anything manufactured today.

[@Wojciech940]

@@fastinradfordable you've got me here, to be honest Are they complicated by anything more than artificial aspiration and fume recirculation? I seem to not be able to come up with anything more than that

[@MrTarmonbarry]

Know what you mean . The yamaha owo1 was a nightmare

[@Selmerpilot]

The biturbo is a very underrated classic with a largely unearned rep. America simply did not receive the cars Europe did, and American mechanics were largely not set to maintain them either. The much later biturbo variants of the mid 90s were the pinnacle of the model and remain outstanding cars. Sadly the US never saw those cars as Maserati already left

[@francesco1998]

Selmerpilot Because a lot of Americans didn’t like small cars like that. Most still don’t. Nowadays it’s American Trucks/SUV’s or Japanese econoboxes. You’ll rarely ever find a German, Italian, European, or other sold here.

[@Pappaoh]

You deserve a great deal of recognition for the incredible work you do and the fantastic content you generate. Really enjoy your vids, regardless of whether they're about 6 valve Maseratis or bike rides and Ćevapi.

[@FabioGs007]

Hahaha very good video man! Gradually improving them more and more! Keep it up mate!

[@PurityVendetta]

Really loving these videos. More please. One of the first jobs I got to do when I worked for a race preparation company was to build up a Maserati V12 vintage Grand Prix engine. I still have my 5 valve FZR1000 RU ❤

[@BustaHymen]

There are few people in this world I envy. You are one of them.

[@timothybayliss6680]

Everyone forgets about the 5v audis. They had a 40v v8 for a couple days

[@felixcat9318]

Thank you for this very interesting, informative and entertaining video on an engine I previously knew nothing about. I particularly liked your 'crying with laughter' emoji at the Italian manufacturer's mention of greater dependability and longevity! Your presentation and narration are excellent as is your humour.

[@ilbonc]

You can't put Maserati, dependability and longevity in one sentence. Never!

[@umbertorossi6488]

I love the effort in speaking correct italian names. Good work!

[@Angrybogan]

Weber carburettors were state of the art. My father's Dodge Charger had them back then.

[@SerbanCMusca-ut8ny]

Man, this is one of the best car chans on yt! I'm eager & excited to see the next topic you'll come up with. Great job so far!

[@Miata822]

What a fascinating little dive into history. Well worth a sub from this first time viewer.

[@Dreso87]

for some reason i really enjoy your videos. you probably have the most knowledge about engines on youtube, keep it up. props from 2 liter portugal

[@wagnerribeiro4061]

Very interesting story. I've just watched this channel for the first time and I really enjoyed the content. Congratulations! Cheers!

[@YusufGinnah]

Maserati has always been ahead of the curve and pushing the envelope with engine technologies. Unappreciated, mostly...

[@fastinradfordable]

Yusuf Ginnah Ahead of the curve, Or behind yamaha

[@YusufGinnah]

@Nathan Brame 👍🏼 Yamaha MotoGP was involved with Abarth which in turn is owned by Fiat- Chrysler FCA, who own Maserati... So they've all got fingers in everybody else's pie these days...

[@mikecastellon4545]

Yusuf Ginnah Maserati : we are ahead of the curve. Me: in unreliability

[@georgesantos-jt6me]

@@mikecastellon4545 thats for sure ,thats why is for rich people they the only ones that can afford that bills from the dealership

[@andgate2000]

They have yet to catch up with Honda’s 8 valve per cyl. 35 years ago.

[@crustydownunder]

Great video Mate. Awesome content, brilliant research and smooth as hell delivery from you. Love your style and approach to your vids. Keep them coming.

[@leonhill6800]

Absolutely Love watching your Videos. You have a very good way of relaying the information that is very easy to understand and your charisma keeps you watching. now I'm gonna watch the 3 cylinder Yaris followed by the A Romeo vids next. Thank you for making such factual and entertaining videos.

[@peterreber7671]

What a fantastic glimpse into history. I really enjoyed watching this video. One of the most enjoyable ones ever, on any topic.

[@TurboHappyCar]

Really good stuff man! These videos are killin' it.

[@billshuey7422]

My Biturbo loved head gaskets. It set in a wanting for news longer than it was on the road!

[@korybeckwith834]

Excellent video! I always wondered what happened with the 6 valve engine. Detomaso was such an interesting figure in the automotive world.

[@802Garage]

I knew almost none of this. Phenomenal video. I was genuinely riveted.

[@DarylCook63]

Always a pleasure watching your informative videos. Keep up the great work!

[@glennrochemusic]

Fascinating discoveries and true with research and development. You have to go there to find out not to there again and what is discovered along the way. Great video and the historical pictures are priceless. Thank you for your efforts. It's really great work. Cheers from Glenn in Australia.

[@WhiteFeather1x]

Pretty awesome video as always. Enjoyed watching it. Keep up the good work

[@RichieRouge206]

Superb video - never knew these existed! Always loved Italian cars. Thank you

[@lesliesingh8324]

Love your videos, so much information and history.. keep it up

[@atatexan]

Great video on a complex subject. Very well told.Grazie.

[@atefelabed8365]

Thanks for the video. Very informative and fascinating actually

[@anthonyxuereb792]

That's some very impressive engine engineering. You want one at home to look at and feel only to be frustrated because you can't see inside.

[@jozsefizsak]

Fascinating and extra informative because of the 5 valve part.

[@Conservator.]

I came here by recommendation of YT. Really liked your video. Subscribed. Tx!

[@RetroMotiveAdventures]

Another great video!!! Learned alot of super interesting facts in this one.

[@whitehorse1959]

Great content, well delivered, thanks.

[@stevebroadbent5080]

Little known but very interesting story. The technical evolution makes total sense too. Superbly narrated.

[@RonaldHarkema]

I've owned a Maserati 422 for a couple of years, as a daily driver. Absolute money pit, totally unreliable, but I loved it!

[@lucaalux]

Hi man, I own a maserati 422, yeah like daily drive is pretty expensive for maintenance and reliability, is not the best 90" car but I love it

[@theEVILone0130]

I wouldn't call them a money pit, I've got two Biturbo's and a Quattroporte and while parts are expensive compared to buy parts for more pedestrian cars like Chevy and Ford. But if you understand that the parts cost more and that you have to find a specialist to tune them if you don't feel like investing in specialty tools to service them and don't maintain them properly and on time they will break and cost you out the ass to repair. But if you look at the fun factor of a Maserati and the fact that the odds of seeing another is extremely rare then they off more bang for the buck. I won't get rid of my Maseratis anyway. After all who else could give you an emissions legal V8 powered family car with hemi heads quad overhead cams, quad two barrel Webber carburetors dual electric fuel pumps to feed it, and full length tubular headers all from the factory.

[@israelsantos7896]

Awesome content and presentation!! Congrats, you've earned a new suscriber!

[@nyreppin1]

Apparently De Tomaso's grandfather was Italian who immigrated to Argentina, as did many other Italians, meaning Alejandro was of Italian decent but Argentinian through nationality. He did need to leave Argentina but that's why he chose Italy. Not throwing any shade just throwing in a little side note.

[@LedzeppelinDogsGuns]

yea but he use the best simple engines AMERICAN push rod

[@nyreppin1]

@@LedzeppelinDogsGuns that was completely irrelevant. The engineering of his cars and his background are two very different topics. Not once did I say what he used, right? I was just shedding light on why he moved to Italy...

[@andynixon2820]

Argentina had probably the largest italian migration of any south American country . To the point that they speak Spanish with a slightly italian accent .

[@Boredoutofmywits]

De Tomaso "nonno" was an inpoverished Italian bricklayer, but his mother was an very wealthy Argentinean lady of highly aristocratic Spanish origin. His dad was a Lawyer (With a PhD in law), congressman, lawmaker and Agriculture Minister (In a the rich country that live off its agriculture exports), depite dying very young, at 44, when Alejandro was just 5. Alejandro was as much of the tipical "Canchero" Argentinean oligarch landowner as anyone can be. With all their virtues and vices.

[@nyreppin1]

@@Boredoutofmywits I can't find any of what you wrote anywhere online. Would you mind sending me the links please?

[@jamesthreats5800]

Very much enjoyed as always ,Thanks.

[@clemensboelen1755]

thanks man👍 You manage to give a lot of info in a short time 👌👌

[@davidgruner1872]

Your videos are so emphatic and invigorating!

[@MyCatInABox]

Awesome story, fantastic info, great channel!

[@pedrotalavera3541]

Very good and informative video. Thanks

[@Lambo6fo]

I love how you add the funny pics during the video. The Pokemon evolution was mint , 🤣

[@pablocespedes9585]

Remember that Honda made an 8 valve V4. It had oval pistons. Thanks for your videos, great quality, super intetesting info!

[@PetAmer599]

That's some awesome staff you teach us today !!

[@markrowland1366]

I had the v6 Massrati, citerone, Volvo, engine in a boxie Volvo. It had been a gift from a car dealer for sending twenty customers in a month. Towing a trailer I realised the B-double, hundred foot long truck on my left was lined up with another on my right and my lane Wes about to disappear. I pressed my foot to the floor and immediately felt the potential I had never imagined was there. 2.8 litre, four valve, racing engine shot me out like a bar of wet soap. I was stuned and well over the speed limit.

[@34SV]

Excelente como siempre, saludos desde Argentina

[@stephenbello1081]

An interesting episode, thanks D4a and Daniel.

[@joeclarke9782]

Very well researched and presented.

[@velobob4299]

As usual a very well made vid. Well done.

[@howardking3601]

Instructive and entertaining presentation, as usual.

[@captnjaygreybeard6394]

Thank you, love learning more stuff

[@BustaHymen]

Great video, never heard of that six valve before. And the bit with, what was it, "unsurpassed reliability" with the laughing smiley.... that actually made me laugh out loud :D

[@alancollard8939]

great vid , got involved in the bi turbo aftermarketcharge coolers , which woke up the old single cam motor

[@toc1957]

Very interesting story! Thank you!

[@imallearsru]

Great and informative presentation.

[@weldmachine]

The best thing about your channel ? Is you take the time to do your research about the topics you discuss Before you post a video. I think this has something to do with your passion for your interest. It,s a shame more people ( Thumbs Downers ) don,t take this into account when watching. It seems the Haters as we know them Love to just hate on something and get some enjoyment from watching something they have NO interest in watching in the first place ???? Love your passion and of course your video,s. Thanks for taking the time to share.

[@fiveneophilosophies9145]

Wow... a great history lesson! Great video

[@jeffgann6613]

As always...excellent video 👍👍

[@Bull761]

Yamaha and Ferrari both went to 5 valve heads (FZRs and F355/360), but then went back to 4V!! Obviously not worth it...I am the proud owner of a 2.8L 4V V6 Maserati with dual Marelli ECUs - one for each bank of cylinders...along with dual sensors, wiring etc etc....lots to go wrong, and it does. The last 4V 2L V6 made 336bhp or 168bhp/L at 1.1bar boost. A real gem of an engine, strong and well designed, the best feature of the car.

[@frankleonard6570]

great video! well done and very informative! 👍

[@kevink2315]

I worked on a friend's Bi-Turbo convertable in the US, that lacked power. Main issue was a tiny inline fuel filter someone had added, starving the carb. But I discovered the boost control system was identical to my 83 Saab's "APC" system, it must have been under liscense from Saab. With the familiar tuning screws on the controller { p (max boost) & f (duty cycle frequency of the WG signal dump valve) } , I was able to increase performance a bit. That carb-in-a-bubble was a first for me. Cool car.

[@fredjones554]

Fascinating vlog. Many thanks

[@rishikeshraj1138]

Nice informative video..I was also thinking that why the engines are not using more than 4 valves now, after using 2 and 4 valves? Now I got the answer 😊😊

[@Mr_Smith456]

Keep rolling out those videos.

[@exvils]

10:45 difference between 2V and 4V is just 5% in hp, but 5V will make same/or less hp than 4V, as one valve on intake is now blocking airflow on sides and even back.. thats why 4V with straight down ports (narrow valve angle with port very high) is used in F1 for last 20years+

[@ANDYblacks13]

good video and info never heard of the 6 valve before

[@samisntreal3278]

Great quality video! Keep it up:)

[@BCzepa]

thankyou for the video, very cool and informative.

[@nevrcm3261]

an example of "just because it can be done, doesn't mean it should be done"

[@JPoz-wi3rw]

You italian pronunciation is both hilarious and very close to the correct one, that's a real highlight of your videos! :D And of course the content's is at very high level as well, so huuge thumbs up for you!

[@cepaasch]

Cool story, thanks for sharing.

[@karlarsch8735]

My Yamaha FZ750 3KS from 1991 and actually driven for 67.000 km runs very well and makes allways a lot of fun to drive..

[@davidelliott5843]

The Yamaha five valve was used in F1 engines and its ultra high performance motorcycles. The bikes get close on 200bhp per litre with no turbo.

[@peterjanzen9182]

Yamaha has no lemons they are awesome

[@clutchfreak13]

250hp

[@theEVILone0130]

Ducati gets over 240 horses out of their 1000 cc desmo valved superleggera panigale. It's a beast since it comes in at just over 150 kg without a rider or about 1.5 pounds per horse power. It's rather scary to think about and easy to see the 100k price tag if you can get one.

[@KingOath]

So good hearing the European names pronounced well!

[@danronck3636]

Super interesting Video, thank you

[@sentinol8943]

Ah, I see. Ihi has to build the boats to transport the turbos, then they have to build the bridges for people to tear them out on.

[@johncunningham4820]

Great Video . I must tell you though , that MTU (diesel) was building V-16 and V-24 , Quad and Sextet Turbo Diesels , for Large Boat Main Propulsion at around this same time . We are talking 10 , 000 or 14, 000 horsepower Engines for Military Patrol Boats , Tug Boats and Coastal Freighter Small Ships . Gear Driven Triple Overhead Cam , with Unit Injectors . True Engineering MARVELS .

[@joannaatkins822]

What an excellent video! You earned my sub, and apparently the KZbin gods approve too. Sublime

[@josefkrakel9136]

I remember the Biturbo and the Milano (the car, not the pepperidge farms cookie). Blow thru carburetors were still a thing then.

[@brianshorey]

Never heard of a Maserati Milano. Alfa Romeo made a Milano (75 in Europe), that car had a normally aspirated V6 and had Bosch LJet fuel injection. That Busso V6 is a wonderful motor.

[@comethiburs2326]

​@@brianshorey lol he never mentionned a brand, just a car. and given their looks and performances, they clearly clashed a little. the 75 milano had many more engines than the V6... 1.6, 1.8, 2.0, a few years afterwards, they added a turbo carbed 1.8 engine. which was destroked a little for homologation needs and fuel injected in the 75 turbo evoluzione. it even got a diesel engine. second gen had the whole engine lineup fuel injected, if memory serves right. never go full retard. do your research.

[@jimrhea5484]

Shouldn't you be off designing a engine somewhere? Holy cow. You rock dude. Ty for the content and engineering details. Some call it boring, but this is the science that makes ICE's run. Details are important. Ty Sir. Subscribed.

[@allancnc]

Very interesting with the 7 valve head and so on, things many people don't know about.

[@backho12]

Very informative and entertaining!

[@chobitrial]

Great video thanks for the info

[@joaoluistavares6046]

I had no idea about this. Great to know about it.

[@midniter2001]

Another excellent history lesson sir. Love watching these videos. Please please please do one on the history of the forgotten VTec prelude. Type sh sir thanks for your time and consideration. Keep up the great work.

[@JeffReeves]

Man, these graphics are actually really well done! Really loving your use of animations and green screen work! Also, I'm curious if anyone has tried to produce any 2 valve engines with just super big valves - taking up everything except like the spark plug hole in the middle or something. I don't think they could go the opposite approach with like 120 microvalves because of cylinder pressures, but that'd be interesting too.

[@neutronalchemist3241]

Any two valve motorcycle engine has the biggest valves they could put in a certain bore. www.automototech.com/files/immagini/ducscram/11A

[@ArneChristianRosenfeldt]

So you are a Mopar HEMI fan as opposed to GM LS engines? HEMI don't even have a hole in the middle, 3 disks form a triangle with the rest filled by a sphere section.

[@coscorrodrift]

Great video man