Toyota's HEMI V8 You NEVER KNEW About
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- Опубликовано: 25 июл 2024
- Just because the hemi engine is nearly synonymous with Chrysler and now Dodge, doesn't mean that other companies didn't experiment with this style of engine. In fact, Toyota mass produced a V8 engine in the 1960s to power a new upscale four door sedan to compete with the big American cars that many wealthy Japanese businessmen were driving at the time. There's a pretty good chance that you've never even heard of Toyota's Hemi V8.
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After Chrysler reintroduced the Hemi in 2003, they kept improving it making it a massive success and they even sell well in Japan to the upscale people.
About isuzu diesel engine
pent roof design.
camless engines
brm v16
Hemis were actually kinda common before CAD. Porsches, mopeds, even Honda and harbor freight generator engines until a few years ago had hemi heads.
The 1990's/00's Honda XR400/NX400 engine has an hemispherical head for example.
Not to mention the multiple Le Mans winning Jaguar XK6 engines from the early 50's.
Mazda had a 1.3 four cylinder hemi.
And almost every 2 stroke engine ever made
HARBOR FREIGHT HEMI👍🏻😃👍🏻👍🏻
The R and 2 valve M engines were also hemisphereical from the top of my mind. 18R-G (3S-G's grandpa) and the 5M-G (JZ's papa) were both 2 valve DOHC and came in the celica and celica supra respectively.
Some varieties of the 8 valve "t" engines also have hemi heads
Edit: lol he said that later in the video haha
@@felixchetlanddevries2998 Yeah the 2T/3T/4T-G were all DOHC 8 valve hemi engines
I was going to say the same thing.
Ford had a hemispherical 4 banger in escorts back in the day.
I have a 5m in my Cressida
Im glad you pointed this out. A lot of people don’t realize this but as you said in the video, hemi is just a type of engine that tons of people have used, dodge just got the copyrights first.
Chrysler saw potential and started developing it early, shame on Ford and chevy that only started experimenting when they saw the potential chrysler Hemi's had
Tbh it’s been like that for years. Everyone copies anyone. It’s not like ford was the first one to ever use DOCH, yet here they are being well known for having overhead cam engines
No Chrysler didn't just get the patent on the name hemi... Chrysler improved what was out there by thousands of hours of R & D. Making a bullet proof DEEP SKIRT BLOCK To bolt the best flowing heads up to that point in time . To make the Total Engine package Complete. Way ahead of their time . Don't down play the facts and hard work that were involved. Chrysler hemi engines still rule the dragstrip today .
Don’t get me wrong, I’m all for big fat supercharged dodge engines, I was just saying they weren’t the only ones to use them.
Hemi was all about valve angle & size (better flow), room for domed pistons and central spark plug location which was conducive to faster burn and pressure rise. Not just about surface area that could possibly be wetted by fuel. Hemi combustion chambers sometimes have more surface area than wedge shaped. Don’t just go with the first thing that pops up on Google for your research.
The old school gen 2 Hemi’s legitimately had pistons that fit into the dome like a glove, with the deepest valve reliefs you’ve ever seen on a production engine. They were shit on the street (easily fouled plugs), but screamed and walked around anything else with top end performance, save for the 454 BBC 😈… which was a semi-hemi in terms of the valve angle layout
Hemis have less "valve shrouding", that is when the valve opens up the valve edges move away from the cylender wall, allowing equal flow all around the valve edge. The hemi also has a more consistent and smoother combustion chamber than most it's competitions cast heads. Easier to cut a smooth round chamber into a head than an odd shape that can only be cast. the smooth simple shape allows for more consitancy. Its smooth shape also fights detonation caused by irregularities. Hemis also have a better valve overlap performance. That's when both valves are briefly open at the same time. The side wall fueling "advantage" issue I've never heard of, will have to think about that
Yes but 4 valves flow more.
@@hotrodray6802 why don't they use 4 valves in NHRA? Why don't DOHC engines make 10,000hp
@@cromBumny The reason NHRA Top Fuel don't use 4 valves per cylinder is because the rules only allow 2 valves per cylinder.
This engine reminds me of the Simca EMI-sul, it was a 2.4 liter hemi V8 based off the ford flathead V8-60
TRD - Toyota Reversengineering Department
The old 2TC and 3TC engines were also hemi, IIRC
Loved the video. Im in the process of getting a Toyota 4V engine rebuilt and you are correct that it is a big challenge. But having an engine that no one else has is pretty appealing to me. Any info I can find on it is always welcome. Its going into my 1965 Toyota Delivery Van which was coach built in Australia.
Another awesome video! Worth every minute.
Bryce, too many scientific flaws. Chrysler's 426ci vs Toyota's 159ci doesn't mean anything. Hemi's are about volumetric efficiency via valve size not combustion chamber wetted surface. The real comparison is 2.6 liters=158.6 ci@145 ft-lbs = 0.91 ft-lbs/ci VS 426ci = 6.98 liters @472 ft-lbs = 1.1 ft/lbs/ci Compression ratio and rpm covers most of the remaining difference. 0.91 for a luxury car vs 1.1 for a hot rod is fair.
The 426 wasn't the best for street use. I would take a 440 for a daily back then. The Hemi is perfect for a race car not so good for the street car. Head gasket over heating it's more of wide open throttle kind of engine. But I give my left nut for a old Himi engine though.
The hemispherical design allows high flow and even compression. It can, and should run high RPM, because there is no squish area. Squish areas promote swirl, but create hot spots and pre ignition. Hemis can run higher compression and flow better at high RPM, but fuel will puddle easier at low RPM
Valve size? Valve placement valve angle but size lol
Actually, he was completely correct. The shape of a hemi head chamber focuses the energy toward the center point of the hemisphere. The domed piston is perfectly shaped to have the most surface area to be hit by the now very excited air molecules that are trying to reach the center of the hemisphere. Maximizing the energy transfer to the piston and minimizing the energy transfer to the cylinder wall.
The "wetted" feature was and is relevant.
As for reliability, the first gen Chrysler hemi was good for around 2000 hp with boost and nitro.
It would be fun to maximize one of these for fun, just to see how for one could go with it.
The Daimler 2.5 liter v8 hemi made more power than the Toyota and 3.5 liter BMW engine of the time.
Drag racers are still getting 1000hp out of it. Do a look at that engine.
Not to say the Toyota engine was bad, just saying.
The Toyota T Series 4 cylinders are also pushrod hemis. The 3TC and 2TC have a following to this day. Although only 75 to 80 hp for most variants used in the Corolla, these motors can be modified to produce much more. They are sweet little motors. There was an OHC variant as well.
3TC engines were available in the US. Remember working on one for a friend back in the 80'S in a rear wheel drive Corolla. It was a nice looking car. Don't see them around anyone.
@@johnpopoff7950 I can find a Pinto easier than I can find once popular Toyotas
My 3tc still running strong 💪 had it on my AE86 sr5 better than the 4AC for sure
I remember in the late '70's and 80's that the 2TC and 3TC were big hot rod engines among JDM Toyota enthusiasts esp. among the E70 Corolla SR5 crowd. Before reliable turbo kits cams, sidedraft carb(Mikunis or Webers) and headers were the order of the day. When you take the valve covers off you see that its got the same type of rocker arms found on the Chrysler Hemis. It was if Toyota took a 426 Hemi shrunk it and cut it in to get the 2Tc and 3TC engines.
I have a 3tc. the head looks like it came off a V8. the crankshaft is massive compared to the typical inline 4. in 2006 someone was getting 1000 HP from a 3tc.
There's another hemi OHV V-8 out there from Britian. The 2.5 liter hemi used in the Daimler sportscar from the late 50s early 60s. Also produced in a 4 liter version and used in Daimler versions of Jag sedans iirc.
Also in the 80s I had two hemi 4 cylinders. Built by Renault. Only 1600 cc but they had one really unusual feature for an OHV engine. The cam was located so high in the block the tappets were in the head with extremely short pushrods.
Leno has one from the early 60s and he has done a video
The 2 TC engine that came in the early Carrola's was nearly bulletproof. Gave enough power for the carcass it dragged around, fuel efficient as the carcass was light as a compact car. My brother drove his to the auto recycler with 259,000 on it, and it had never been opened up for internal repairs. Fantastically reliable. Cheers.
Ok, you are the first I've heard on RUclips mention the "T" engine. I hope you do a video on the 2TC engine. They were built like big blocks inside, cross flow hemi heads. Lot's of potential if they had remained.
Also the Ford 427 SOHC Cammer V8 is also a Hemi and they're other Hemi is a Boss 429.
I thought they were more a SEMI than an actuall HEMI??
@@HEMIPOWER604 That Semi Hemi is mostly on the 351 Cleveland V8.
Hemi is a marketing ploy aimed at people who don't know any better.
He said ohv was introduced for the 5v. To be a hemi it would have had to be ohv or ohc from the beginning otherwise it would have been a flathead
Obviously he mixed up ohv and ohc.
Hemi's were originally designed to be for the P-47 thunderbolt back in the 40's but the Gov dropped the contract and Chrysler kept working on it. Ive seen a couple of these Toyota Hemi's in some custom "Mini Hemi" builds one even had a custom blower
For the Chrysler hemis, You are correct. The 1908 Welch motor from Detroit was the first hemi. The Duesenberg 1929 had a 425ci DOHC engine and was a Hemi
@@cromBumny Chrysler is having major success with the Hemi selling a ton of them all over the world. They are much improved from the original design and you are talking 900Hp out of Hellcat Redeye.
That’s right, but it was for a prototype of the P47, which had a much narrower fuselage. It made more horsepower too, and I think it would have the plane to beat as far a propeller engines were concerned. It had a top speed of slightl over 500 mph. Damn fast for the day! Unfortunately it was too late in the war for it to go into production, and the ME 262’s the Germans had flew a hundred miles an hour faster. Clearly, the future was the jet engined aircraft. But if it hadn’t….
@@kennethcohagen3539Yeah them 262s only needed more fuel. I wish the hemi got into production during war time But the p-47 got the pratt whitney r-2800 doublewasp wasn't to bad of a airpump for its time neither. My gramps flew grumman F7Fs was a twin engine fighter with 2 of them @ almost 2500hp apiece lol I still run a 600hp r-1340 wasp on my ag-cat its very similar but half the size most safest aircraft motor built since late 30's you can blow them in half and still get home not like are turbines when they fail I also wish they completed the All aluminum 425cid Hemi-Pontiac engine that Chyrstler sent engineers for a week to help design with GM on but never got off the Chalkboard
@@mattmalone524 there also not even really hemis anymore
Check out 80's Toyota Hemi 4cylinder engines 2T, 3T, 13T engines.
My 65 Daimler 250 had a great exhaust note thanks to hemi type design .
THANK U SIR FOR A WOUNDERFULL LOOK INTO THIS HISTORY OF TOYOTA
I have read about these, but have never seen one in person in our shop, I guess they'd have to be imported here in the U.S. for that to happen.
Check out chevy's v6 hemi. It had hemispherical combustion chambers and similar mopar valve train setup for straight in straight out volumetric efficiency through the heads. Compression ratio could be higher in a hemi that quench zones and wet areas are eliminated.
Toyota were more interested in the British Edward Turner designed Daimler 2.5 litre Aluminium Hemi headed V8 which was used in the Daimler -Jaguar 250 sedan and the Daimler Dart Sports car.and built their version of that for the Century.
I don't know alot about the motor, but Lexus(toyota) was using a 4.3 v8 in their SC430(usa), back in early/mid 2000's.
It was impressively fast. And all wheel drive. Very fun car to drive.
Toyota built a inline 4 that was a direct copy of a Hemi Head. It was called the 2t, 3t, 12t & 13t. They built these from the early 1970's.
Lots of engine designs use a hemi type head , hell my Ford 3.0 duratec does . Chrysler has beat the hemi name to death , the true ones were the 392 and 426. I know the hemi fans bois will be pissed but there you are , there is nothing unique about a hemi anymore , just the name.
Heck even the Ford 5.0L Coyote V8 has a Hemi design to its 4-valve DOHC V8 as well.
I read years ago that Edward Turner of Triumph motorcycles back in the 30s made the triumph speed twin 350cc with hemi design first and absoultey destroyed the opposition with it.
You can also put Citroen & Peugeot, though 4 cyl, in the rocker-armed HEMI non-OHC daily driver club before Chrysler. Don't know if anyone thought it was real winner, but with the small bore long stroke thinking of the time, it's about the only way to get large valves in a small cylinder & able to fill it efficiently for better HP per CI/CC. Also, the Citroen valve seats, except for the 3-angle, were a smooth venturi.
Question: is the image shown at 3:22 the right engine? it has spark plugs mounted between the valve covers and manifolds, as is common on wedge engines, rather than through the valve cover as is typical on hemis. 4:14 the photo of a 5V-E shows plugs through the valve covers as I'd expect.
5:39 you refer to the "introduction of overhead valves" (and fuel injection) on the 5V. I'd be extremely surprised if the earlier engines didn't have overhead valves: I'm not sure how you could have a hemi with side valves.
You're absolutely correct. Overhead valves (OHV; as opposed to "flathead") have been the standard for engines since the '50s, and were used in all of these Toyota Hemis. The presence of rocker shafts on the heads (in photos) clearly prove that. Bryce may need to focus on personally studying and working on engines themselves (hands-on) with no thought whatsoever of becoming yet another insipid RUclips star. Numerous factual errors for RUclips groupies to devour.
Yup. Quite a few boo boos.
Think he meant overhead cams. There are hemi heads that don't have the spark plug through the rocker cover. Typical hemis are cooler looking though.
@@rossbrumby1957 a semi hemi chamber on an OHC engine is very common, especially DOHC. Some SOHC engines use inline valves (Ford SOHC V6 did for a long time), obviously nothing DOHC does so they're at least reasonably close to hemi.
What hemi head doesn't have spark plugs through the rocker cover?
@Daniel I think the image at 3:22 is correct’, in that it looks like Toyotas ‘first attempt’ of their so called hemi V8 in the early 60’s (1964?). This earlier engine seems to have somewhat of a hybrid combustion chamber shape. In the early engine the valves are side-by-side & in-line, & therefore doesn’t have the advantages of angled valves you would see in a hemispherical head. The combustion chambers in this early Toyota engine are somewhat of a bowl shape. It’s ‘trying’ to be a hemi, but in reality it isn’t. The type of hemi as you might know it, with angled valves & central spark plug, was produced by Toyota later on in 1967?
Wasn't the 1916 Curtis Wright OX5 series engines hemi, 503 cubic inches? And they had bee hive springs, aluminum blocks, and flat plane crankshafts, too. LOL. year 1916
I know the Toyota tundra comes with a 5.7l v8 nowadays, is it related to chevys 350?
When you came to the 93 5v engine you mentioned upgrades, but mentioned “over head valves”, but I believe you should have said “over head camshaft “?
toyotas racing inline 6 in the late 80s early 90s for group a had a hemispherical combustion chamber too. just like the Mitsubishi 4g54t (or the starion turbo 4 cylinder) also has a hemispherical combustion chamber.
pent roof?
Fascinating, I what one now just because of there rarity
Local guy had a Toyota hemi 32 street rod built, engine and trans. Had to hire Toyota reps from CA to make it run right. $$$$$$ 😁 saw it, have pics. Nice. $$$
I know that in the 70s probably the late '70s Mitsubishi also had a hemi-headed four-cylinder and I think comparatively speaking it was a large 4 cylinder
The astron motor. Well known in Australia in the Chrysler then Mitsubishi Sigma, Magna, L200 utes, L300 vans, Tritons and Pajeros. Famous for widespread introduction of balance shafts.
I'm on the constant lookout for a good rolled sequoia with a 4.7 to put in a Tacoma project
Anything with a TOYOTA name on it will simply last 100 times longer then anything else. 😊
Mitsubishi used a hemi in their 4cyl in the 80s
Ford built hemis in the 60s also.
Ford had a hemi in 1939. 1100 cu. in. all aluminum, DOHC engine. 500hp and 1000 lb ft of torque.
arent the 5.7s in the 2nd gen tundras also a hemi?
The RZ are DOHC, and considered a successor to the UZ engines, if I remember correctly. The I Do Cars channel recently tore one down, with explanation of applications and shortcomings of those particular engines.
Great video. Never knew about these engines. Had a chance way back in the day to drive a 1962 GMC pickup and never knew they had their own line of very underpowered, but allegedly reliable engines. This truck had a 305 cubic inch (5.0L) V6, not V8 engine. If you looking for a video idea, these were rare engines, but some history there: en.wikipedia.org/wiki/GMC_V6_engine
Very cool! I'll look into those engines.
@@Dustrunnersauto : Good deal. Thanks.
The GMC V6's weren't rare in the day (1960 -1974) but they are today. I'm not sure where you come up with the "underpowered" remark as they were competitive with other sixes of the time in HP/torque per cubic inch.
They were very reliable. Their biggest problem was fuel consumption. The large bore/short stroke created an unfavorable surface to volume ratio, thus more heat was rejected from the combustion process lowering overall thermal efficiency. Compared to a 292 Chevy or a 300 Ford, they used more fuel.
I have several of these engines and my dump truck is powered by one of the larger ones as well. Best damn heavy duty gasoline truck engines every made.
@@turbo8454 For the sensitive viewers: The 5.0L is "underpowered" by modern standards. Getting 150hp from 5.0L of displacement is not that great for most of us.
@@brenteason9891 You didn't specify in your original post. As I am not a mind reader, all I can say is.........no $hit sherlock! Everything of that era is "under powered" by today's standards. You get a captain obvious award!
As you missed it, they were competitive with other similar displacement engines of the era in HP and torque.
Toyotas 2TC and 3TC were mid 1970s inline 4 HEMI engines.
The first hemi engine was In a Welch Tourist 1903 a two cylinder. Chrysler was building hemi engines for military and aircraft in the ww2 era. Then Chrysler designed and built one in 1951 for the imperial and New Yorker. Mind you the design of that engine started in 1941 and they wouldn't put it to market until they knew it would consistently run 100,000 miles before wearing out. And needing Part replacements.
If they weren’t so rare I’d say it’d be a cool engine to build simply because it’d be different, although you’d be paying a lot getting custom internals machined
Check out the English Daimler 2.5 liter v8.
Toyota v6 3.4 is hemi too..
Daimler also had a Hemi, in the early 60's.
Don't forget the pre 2k v8 Benzes 4L, more than capable of 160 mph in a 4k lbs four door sedan !!
Is this video timelaps or photo timelaps ?
I was in my Prime then I never seen one
68 Toyota Corolla had the little hemi 4 cylinder my friend ran the crap out of one of those little cars ! That was back in 1971 when it was old enough for his parents to let him drive it
Hemi was all about valve angle & size (better flow), room for domed pistons and central spark plug location which was conducive to faster burn and pressure rise. Not just about surface area that could possibly be wetted by fuel. Hemi combustion chambers sometimes have more surface area than wedge shaped. Don’t just go with the first thing that pops up on Google for your research!!
Explosions are spherical by nature like the Hemi combustion chamber. The large chamber allows big valves witch is almost always the main restriction in all poppet valve engines. The intake and exhaust valve location allows a linear path in one direction. The huge valve size has big curtain area @ low lift cuz3.14 ! Geometry moves both valve away from the cylinder wall in a chamber that has little to no valve shrouding close to the seat. That’s why a Mopar Hemi is so good at peak power numbers. Modern engine is a semi/Hemi with dual quench pads where the spark plugs enter the chamber. A tight quench is a game changer you might call a knock suppressor. Allowing lower octane fuel to pay well with high static comp numbers. The quench pads location in the Hemi chamber are square and directly over both ends of the wrist pin. So no asymmetrical load contributed to excessive piston “rock” @TDC aka piston slap.
Experimental the v8 and ended up put a v12 in
22R was a hemi.
Any idea how much these engines weigh? Physical dimensions? Might be exactly what some custom builder is looking for.
5:29 Toyota didn’t keep the power low to improve reliability. They kelp hp low to save gas. 6:02 4.0 liter equals about 244 cuin. The Toyota v8 was 57% smaller but it made 77% of 1 hp/cuin. If Toyota v8 was 426 cuin. It would have made 327 hp. That’s not weak.
Something you said is rather confusing. Ya stated that the Toyota Hemi V8 was 57% smaller than the Chrysler/Dodge 426 Hemi, but made 88% of the power of the Chrysler/Dodge 426 Hemi. Is that correct? Because you then stated that if the Toyota had been 426 cu in, it would have made 374 hp. Yet the Chrysler 426 Hemi was "officially rated 425 hp" at something around 5,500 rpm ( or 5,800 rpm? ). Of course we all know that Chrysler 426 Hemi made much more power than that when tweaked to run 7,000 rpm's, because it proved it could still keep building hp as the rpm's were raised. But let's stick with the 425 hp for argument's sake. If the Toyota version was 57% of the Chrysler version in size, yet made 88% of the power of the Chrysler 426, then if the Toyota version had been 426 cu in........wouldn't that be far more than "374 hp"??? I hope this is making sense in understanding the point I'm trying to make. ???????????? Thanks in advance.
@@howabouthetruth2157 I was driving when I typed that and I got some stuff wrong. I went back and changed some numbers.
@@howabouthetruth2157 He compared a 244 cuin engine made in 1988 to a 426 cuin engine made in 1970. That to me is wrong. Lets compare a 1988 Dodge 318 cuin engine to a 1988 Toyota 244 cuin. The 318 made 172 hp or 16 hp less.
@@blackericdenice Yeah, I thought there must've been some typo/error going on, lol. But even with the adjusted figures, the hp per cu in for the Toyota is nowhere near that of the Chrysler 426 Hemi. And don't get me wrong, I'm not implying that you ever said otherwise.......just making an observation, thanks to the figures you so kindly provided to us. By the way, I'm no brand loyal snob........I like & appreciate any proven, classic power plant made by any of the auto makers over the years. Thanks again & best regards.
@@blackericdenice Dude, Literally EVERYTHING you say in ALL of your Videos is WRONG, and when people PROVE you wrong, you call them liars and delete their comments...RUclips would be a better place without you...
Your missing one important design advantage that the Hemi has that no other engine has. Its a true cross flow cylinder head design. The valves are inline with the intake and exhaust manifolds. making it a true cross flow engine.
Some of the Toyota hemi heads bolted on to small block chevy blocks. Chevy also used the small rod journal from Toyota. Drive and let it die.
It also doesn't have a central spark plug location. Another example of them trying to copy us on the cheap.
A lot of engines are "hemi" some chainsaws have it. So nothikg special.
Porches, Aston Martins, even the Ford flathead had iterations that were hemis. Like you said nothing special, Chrysler was late to the game, they just popularized it.
@@InuranusBrokoff Chrysler was first to the game in massed produced cars with V8 hemi's. The Ford flathead conversions (Ardun) were rare (about 200 pairs of heads) and came about when they were no longer needed to help the ailing flathead. Ford had bigger and better stuff coming.
@@turbo8454 Pipe, Fiat, Peugeot, Alfa...
Chrysler was late to the game.
@@InuranusBrokoff You should read what I said before you spout off. I said V8 hemi's.
The four makers you mentioned weren't even inthe V8 hemi game.
I wouldnt say it's not special. it's just more common than people think. it's a brilliant concept that works pretty damn well.
Actually you are half right, a true hemi is named as such as the intake and exhaust valves are angled directly to the respective port, The CC can be rounded or not depends on the design. Look at any V8 American overhead valve engine, all the valves are run horizontally down the block, neither valve closer to its respective port they are all in a line. A hemi turns this 90* where the intake is high up on the Inner side of the cylinder (Closer to the camshaft), where the intake port usually is. The exhaust is lower to the outside of the block (away from the camshaft), where the exhaust port is. Also the rocker geometry is usually different as well as both are usually actuated closer to the center of the head Intake is usually turned opposite to the exhaust. Basically instead of the valves looking like this - - - - (imaging each dash as two valves for one cylinder) A hemi is like this : : : :, where each set of valves are turned towards the proper port. I know what you are thinking, I just described every overhead cam engine in existence for valve layout... and I did. You see without the hemi most of the current superefficient combustion chambers would not exist Most geometry would not be properly set for max efficiency and Multiple valves (more than 2 per cylinder) would not be possible. Also the ford overhead cam V8, would not run so well, if the hemi didn't Pioneer the geometry first
Excellent break down
@@christopherjones512, grew up in a dodge family, i used to read everything Chrysler Dodge or Plymouth, the hemi is also the engine used in the upper echelons of drag racing Top alcohol and top fuel dragsters and funny cars are almost exclusively hemi based
When he says 3V and 5V I assume he's talking about a V6 and V10?
nope... both engines are V8
All they needed to do was add a supercharger! Even if it was only 3-4psi boost,
If I designed a hemi V8 or V6, it would basically start with a LS or LT bottom end, the difference would be in the heads, dohc with VVT, and variable duration, about 3", 3.25", and 3.5" stroke, with 3.9", 4", and 4.125" bore, with a crankcase, capable of fitting a 4.280" stroke without issues, or mods, and a bore of 4.280", with sleeves, or bored to 4.160" the heads having 4valve hemi style, for the larger displacements,larger output, and 2valves for the smaller, direct and port injection, with direct only capable of supporting about 380hp and 6800-7200 , the dual injection, on more race spec naturally breathing, 600+/- hp 8500+/- rpm, squeeze in the largest possible valves the bore allows, the small bore with larger valves would require clearance of the block, only the largest bore would have extra clearance, a turbocharged modified version should be capable of in excess of 1500 HP, with 8 bolts per cylinder, 2 of those would be long studs and screw into the main journal webbing of the front main, and each in-between, with 20mm threads, like the inner mains, 20 mm thread with 24mm head and nut, the the bolts or studs screw into a solid aluminum that is a part of the main webbing, not to the deck like old engines, that distort the cylinder bores, the bore spacing would be enough to allow 1.5-2mm between the bores in the water jacket , with the inside of the water jacket, anodized or some coating that prevents corrosion! Extreme temperature Epoxy if nothing else, the external main bolts would be 10mm, with shouldered 15mm heads, about 20mm at the shoulder, and about 40-60mmlong, the pan rail being about 12mm at the thinnest, the mains and cylinder floors, the 30mm deck, 40mm wide mains, all ties together, the water jackets sealed. In by 3mm walls with 6mm ribs, and mount areas engine mounts, and bell housing mounting area, and the front of the block around 30mm in the most important areas, with reliefs, and ribbing to reinforce the thin areas, example between the bell housing mount, and the deck, with each bank connected by a 8mm rib between cylinders! With the front and rear being about 12mm with 6mm bolts on the valley cover, the valley that holds crank case venting, and oil passages to the heads, the oil pump bolting on to the main caps , similar to a Honda k24, , with the ability to mount the pump in front or rear, with the sump, the pump and it's bracket reinforcing the main caps, can be mounted with pump either way, front or rear, along with the oil pan, with the sump front or rear the pan with fins to help with cooling, and windage slightly in the pan, the valve covers similar, smooth across the top, fins on the sides, with the option of two plugs per cylinder, with dual output coils, possibly 3per cylinder, on the largest bore 4v heads, 1 in center, 1 on the outer side of the valves, (testing to see if there is any gains!) But either center plug, or two outer at least, with a 9.5:1 minimum compression, the valve angle would likely need to be nearly flat, 12°-18° to get the compression up on the smaller engines, the valve stems would be longer than common engines, to allow the ports to allow the intake and exhaust to flow straight into the top of the valve, and the exhaust to exit straight from the cylinder to the manifold, without hitting the port roof with anything more than a glance! Similar to the Chrysler 340, it will be difficult to fit all this into the heads, but maybe with cad help, the specs can be pushed and pulled until everything fits the space! Crazy dreams, if I had to pick, I'd say the mid. To upper 300 cid , 4.125" bore, with 3.4" stroke , the VVT,. And vdur, should allow it to run like a diesel down low, and make tons of power up high, with variable runners, going from near 18" runners to basically no runner only tiny trumpets, with a door that blocks the main in trance to the short runner, the default position would be the short runner down low, with the long runner running into the short at an angle, no door would allow both to be used , the long runner up high, short down low, in the plenum, close the opening to the plenum, to simplify thing's to not have 8-16 doors, or forget all that and just use 4"-6" trumpets in a plenum, basically funnels, strong enough to handle 4bar of boost, the VVT and variable duration, should slow plenty of low end/high end power, sorry to ramble, great video, I love history!
You say the later Toyota hemis ended up ohv, surely they were all ohv?
Toyota built the Duramax diesel too lol
B-1 Wedge poops on the hemi head. Predator is even worse! My father was the first guy to manufacture A 100% “billet” hemi head for blown Fuel and Alky cars in drag racing. Hemi’s are best for WOT power but The RB wedge revs quick Makes great Torque and will beat a Hemi in averaged power over a working RPM range.
That Toyota Engine and Crown should have sell in America and compete with the GM B bodies Ford and Chrysler products
Didn’t watch because most engines have been configured like a “hemi” for quite some time.
Like my early 90’s Isuzu trooper
And the V8 Nascar?
Is that a plan B shirt ?
Maybe 🤔
It has inline valves, so it doesn't have the nearly straight ports of a proper hemi. I say it is a dud.
It could have made half the power with all the years developing and tech used😊
Buick hemi. Nail head engine.
Subaru uses a hemi head
Are we going to see one?
The word Hemi is trademarked by dodge chysler
2TC 3TC 4 cylinder Toyota hemi
Mitsubishi engines, such as Astron, Saturn, Orion and Sirius, all have hemi heads. In fact just about every Mitsubishi engine with a SOHC, two valves per head, crossbow, has a hemi head. Let's go further and any gasoline engine with a cross flow, two V canted valves per head, typically has a hemi head. From Toyota's 18RG, 20R and 22R, the Toyota M engines, Mazda B engines (8v only), BMW M10, M20 and M30, and the list goes on and on.
and the First Hemi was the 1909 Welch motor designed and built in Detroit. The 1929 Duesenburge (designed and built in Indiapolis Indiana) was a DOHC Hemi head (it was also a 7 Liter with 275/350hp)
What about the 427 Ford/Mercury HEMI How many people know about that engine ?????
My question is, can we buy one? Japan's laws regarding vehicles is that owning a vehicle increases in expenses, such as insurance or registration, as time goes on by the year, encouraging citizens to buy new every few years. My memory is based on Donut Media.
yes.... I found mine on Yahoo Japan.
Max output of the v engine was 190PS so not exactly competitive with an american V8
just to chew on..... a 289 2bbl(C code) put out 200hp, while a 289 4bbl (A code) put out 225. Those are 4.7 liter the 5V is 4.0 liter
@@oldeskewltoy3856 those were also very low output versions for their displacement you could get 275 hp 289s that's an extra 11 hp/litre for a normal wedge head engine
They should have just put an L24 or L28 in it.
🤔
All Porsche engines are hemispherical. At least the air cooled versions are.
Ford cvh is a hemi.
Have not seen video, Toyota kept it for the century.....not for export.
You mean they copied th 330 hemi of 1950 fist put in DeSoto, and fist motor bike of the 30s Crocker ?
?
You said Hemis dominated NASCAR , but didn't Dodge only win 6 races , Plymouth win 8 , but Ford won 29 in 1969 and 1970 ? If that's correct , doesn't sound dominating to me ?
The Welch motor company invented the hemi in 1904! Bad luck Mopar! !
Nobody said chrysler invented it brother, chrysler improved and developed it
@@kuiper6926 so GM can put together a hemi LT5 and ford a hemi coyote and all is fair in love and war eh!
@@petervossos4816 technically, yes. They cannot use the "Hemi" name since it's trademarked by Chrysler, but they definitely can make a hemispherical combustion chamber for their engines. There's a custom hemi head made for LS's by the way.
@@kuiper6926. I haven’t seen the LS Hemi. I have seen the SBF Hemi by hammerhead heads, they don’t look complete hemi… valve set up looks wrong!!! I’d love to see the big three build big block Hemi engines and go hell-for-leather on the track like they did back in 1969/70 when the big superbirds took on the challenge to break the 200mph barrier! Amazing!
@@ShadowBannedagain Welch was bought out by GM and stopped production of the hemi in 1910. Belgian company Pipe designed a 4 cylinder.. ran by Fiat in the 1907 Grand Prix. Peugeot and BMW built their own designs! GM developed the hemi 302 in 1969 and Oldsmobile tried to build a DOHC 455 hemi. Ford was the closest rival to Chrysler with the 427 cammer but the engine had timing chain issues! I would like to see ford build their own hemi big block without the Mopar boys saying that they own the Hemi, that’s all!
Japan built plenty of hemis, just not V8s.
I knew Chrysler stole The Hemi 😂
Chrysler created a Hemi V8 engine before Toyota did. The first Toyota Century was a great V8 powered sedan.
Sold in 1964. Chrysler had the hemi way before 64. They didn’t steal it
@@johnnymason2460 ford was the first automobile to use a hemispherical head design.
The hemi style head was in aircraft engines way before any automobiles.
@@evil_me That's actually true. I believe Chrysler was involved then. There was a car company that was doing a hemi engine even before Chrysler.
No real Hemi engine except Chryslers and Ford SOHC! Sorry to burst the bubble, if there is one!😗
"not Dual overhead cam"
Yeah…not Single overhead cam, either. Cam in block…so delete that "dual"…
Cammers kill HEMI's