Toyota Tundra 3.5L I-Force V6 Engine *Heavy Mechanic Review* | Is It A GOOD Engine ??

I have finally got my hands on a 2023 Toyota Tundra with the 3.5 L I force twin turbocharged engine and I cannot wait to get under This Hood and tell you guys what I [Applause] [Music] think well this is the first hundra I've had on the channel and I mean right off the bat the looks I don't know if I'm loving them I think the truck looks like it sits really low um let me know what you guys think do you like the look I'm I I don't know I'm I'm undecided this is a midlevel trim the SR5 it's not a bad looking truck um it does feel like it is a quality build when you're driving the ride quality is awesome but today we're focused on what's underneath the hood this twin turbocharged engine today first of all what we're going to do is we're going to take a look at some specs and some features of this engine and then we'll talk about some things that I really like some benefits associated with this engine um in its design as well as the approach Toyota took kicking things off this engine is actually not 3.5 L it's actually a 3.4 l engine however the marketing team at Toyota felt like 3.5 just had a better ring to it and if I was a betting man just maybe because the F-150 with the 3.5 L EcoBoost is probably that engine's main competitor this engine has large shoes to fill the predecessor the 5.7 l V8 was and still is very much loved by Tundra owners um that engine was probably the closest thing to bulletproof as you could come with simple maintenance those engines would run a very very long time the only issue with that engine and probably ultimately the demise of that 57 was the atrocious fuel economy that came with it this 3.4 l engine also known as the v35a FTS um is a part of Toyota's Dynamic Force engine family family and those engines are built on four criteria Driving Experience power performance quietness and fuel economy this thing is a dual overhead cam twin turbocharge V6 setup um built in Texas comes with an aluminum block iron liners as well as specifically designed aluminum heads with Cooling in mind there's low friction aluminum alloy Pistons giving this thing a compression ratio of 10.5 to1 this engine also comes with a dual fuel injection system um both direct injection as well as port injection which I really like also this engine is a very heavily unders squared engine which I also really like this engine can also come with an electric hybrid motor better known as the iForce Max this Tundra does not have it however and I'll have to make another video kind of diving into that as well but with the hybrid or without the hybrid you still get this 3.4 l twin turbocharge engine the first thing thing that I really like about this engine is how extensive the cooling system is and while heat is a killer when it comes to engine longevity and ultimately reliability especially when we are talking about a forced induction engine firstly we have the water cooled exhaust manifolds um does two things firstly it's going to help cool the exhaust gases before it hits the turbos um and secondly it's going to help speed up um this engine warming up and over the long run that's going to help reduce wear and because when engines are warming up that's typically when we see a lot of wear the exhaust valves are sodium fills which really helps to dissipate heat much better than just a traditional metal valve um this engine also has dual piston oil squirters basically oil is going to be sprayed underneath the Piston it really helps to cool it especially when the engine is under load the turbos each have their own water-to-air intercooler um which helps to cool intake gases before it hits the engine also the turbos use a separate cooling system system which uses a separate radiator as well as a separate electric pump so cooling was taken very very seriously when it comes to this engine the second thing that I really like is how they implemented their fueling system using both direct injection as well as port injection I've talked about this a number of times when looking at the Ford engines because like the Toyota it also utilizes a dual injection system both direct injection as well as port injection and I really really like it to this day it still shocks me that GM has not gone down this road with their direct injection systems um but I digress direct injection which this engine utilizes um sprays fuel directly into the combustion chamber and there's a number of benefits with that firstly is better fuel efficiency um better response out of the engine as well as just optimization of power and performance now it does come with one major downside and that is the carbon up of the intake and the intake valve eventually over time resulting in a restriction of air flow which can lead to problems down the road Toyota being the smart manufacturers they are went ahead and went with a dual fuel injection system with the addition of port injection now what port injection does is it constantly sprays down the intake and the intake valve and it actually cleans off all the carbon so you don't get any carbon buildup with your direct injection fuel system essentially you get the best of both worlds with no consequences another thing I like about this engine and what actually generally surprised me is the shape and the design of these cylinders um as well as how heavily of an unders squared engine this engine really is what the hell is an unders Square engine well basically means that the stroke of the Piston is larger than the actual bore of the cylinder um nothing new there lots of engines come like that but in a V configuration it is somewhat rare typically with the V8 a V6 we see the exact opposite we see an over Square engine meaning the bore of the Piston is actually larger than the stroke so very interesting to see what Toyota's doing here the only V configuration engine that comes to mind is the 67 Power Stroke it's a V8 it's an undersquare engine comes with a stroke of 107 mm with a bore of 99 mm giving it a stroke tobore ratio of 1.08 to1 so even that is really not a heavily unders squared engine at all this engine however comes with a stroke of 100 mm with a bore of 85 mm giving it a stroke to bore ratio of 1.18 to1 which which is a massive undersquare ratio for a v configuration engine where am I going with this well again I've talked about it a number of times um undersquare engines with that long stroke have a very good mechanical advantage and this translates to an engine being able to produce torque extremely well very low in the RPM band um which is exactly what you want in a pickup truck a large stroke gives you a large crank throw and a large crank throw gives you much better mechanical leverage when trying to rot at that crankshaft and that is why these engines um can produce really really good torque very easily low in the RPM band again perfect for a pickup truck perfect for hauling Towing even perfect for off-road situations so I really really like that Toyota has done this with their V6 the 67 C known for its Towing ability and its massive low-end torque has an unders Square ratio of 1.16 to1 this engine right here has a greater unders Square rtio IO than the 67 cumin at 1.18 to1 which is honestly impressive this engine literally has a larger stroke than the 6.6 L Duramax yet it is still perfectly balanced and it's just the engineering that Toyota has done to probably do so is pretty impressive now finally before we move on we'll look across the room here to this EcoBoost on paper both these engines look identical it's a 3.5 L dual overhead cam V6 but in re reality the internal workings of these engines are completely different um this engine is an over Square engine coming in with a 92.5 mm bore as well as a 86 mm stroke giving it a stroke to bore ratio of 0.92 to1 um completely opposite of what is in that engine right there with a shorter stroke and a larger board in this EcoBoost um ideally in theory on paper this engine should be much more favored in terms of its topend performance and well if you guys have ever driven one of these things they are lightning fast so there is some truth to that to the floor Oh my Jesus on the flip side with this engine having the stroke to boore ratio of 1.18 to1 um yes it may not have that topend performance like the EcoBoost but what it will have is much more accessibility to that torque without having to use added boost um using less boost is going to mean less heat less wear and tear on the engine and again in theory should add to longevity as well as reliability so I like everything about it another thing that I like about this engine is that the cylinder Center Line is offset from the crankshaft Center Line this just gives this engine another mechanical advantage helps to turn the crankshaft easier easier to generate torque as we talked about earlier um this is nothing new in fact uh this was implemented as as far back as like 1905 um and it was done so to help hand crank engines over because why it helps lead to a mechanical advantage another thing I like is how high the thermal efficiency is on this gasoline engine Toyota claims the thermal efficiency is 37% which is very high for a gasoline engine um thermal efficiency basically what that means is how much energy from the fuel is actually getting translated into mechanical energy to physically turn your wheels um so apparently 37% of the energy from fuel is being used to mechanically turn those Wheels which again in a gasoline engine is very high apparently this High thermal efficiency is class leading although I couldn't necessarily confirm against other engines so we'll have to take their word for it but it is believable because one of the key features of um Toyota's Dynamic Force engine family which this comes from is high thermal efficiency now there are two benefits to having high thermal efficiency the first benefit and fairly obvious is well higher thermal efficiency means you can use less fuel because more of the fuel is being turned into mechanical energy meaning you need to use less of it to do the same job the second benefit and it fits very nicely with this engine is that less of that chemical energy is turned into heat meaning that the engine's cooling system doesn't have to work as hard to cool the engine the reason why diesel engines are so much more efficient than gasoline engines is because they just have a higher thermal efficiency they are able to translate a lot more of that chemical energy into mechanical energy which makes them simply more efficient lastly what I like about this engine has actually nothing to do with the engine at all but it's what's bolted to the back of the engine a 10-speed as transmission um as is a Japanese manufacturer and they are known for making very very robust Transmissions so I have full faith that that will be a very very nice addition to the engine as well as the engine performance overall those are the things things that I like about this twin turbocharged engine it does seem like Toyota has tried to build this thing to last only time will tell what do you guys think I know the 5.7 L was an incredible engine are you guys excited about this twin turbocharged engine or you going to try and hold on to your V8s as long as possible but it ain't all sunshine and rainbows next week we're going to take a look at some issues already known with this engine as well as some things that I generally just do not like about it and I'm going to warn you I found something that put a very sour taste in my mouth so look forward to that next week as always guys if you did like the video don't forget to leave that thumbs up and if you like cool stuff like this don't forget to subscribe we'd love to have you guys on board anyways enough of me we'll see you next week when we take a second Deep dive into this engine but we venture on the dark side

Channel: The Getty Adventures

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Id: l7_8yx01rhM

Length: 12min 22sec (742 seconds)

Published: Mon Mar 11 2024