Tacoma may get a 4cyl Turbo

Maybe because you don't know much about turbos or aren't willing to learn?

 

That is interesting. I've yet to see dynos show power or torque below 2000 or 2500 rpm.

 

I am willing to learn of course. Please show me.

 

2tr and 1 gr

 

Generalizing an RPM is silly, since cars have different redlines and rpms that they will "cruise" at. But take the 2020 supra for example. It's not even a truck, but it makes peak torque before 2200 rpm. Not starting to build up torque. I don't even want a turbo 4 in my truck, but I've been tooling with turbos for about 20 years and I've seen that the technology with turbo cars has increased immensely. A lot of the old adages don't apply.

https://www.caranddriver.com/news/a27543113/2020-toyota-supra-dyno-horsepower/

 

Turbo's need load to make boost not RPM. That's why they're so great for towing. You can cruise along at 1500 with no boost. Hit a hill and the load increases so the turbos adds boost to get up the hill without having to drop down a gear or change the RPM.

All you hear is a little whistle and truck goes right up the hill without breaking a sweat. I'm all for a small turbo six in the Taco. Would be great.

 

So many old adages that don't apply to vehicles anymore.

 

would this 4 cylinder turbo be faster than the v6?

 

I actually build boost as I'm stalling when I'm offroading because of such a high load. Definitely doesn't stall as easily anymore.

 

I would also like to point out that "cruising at 1500 rpms" in an unloaded vehicle takes like 30 ft lbs of torque so that isnt the best place to ask for torque increases... Cruising at 1500 rpms pulling 5000 lbs maybe... But a turbo would spool faster under a load so that is still moot

 

The last turbo engine vehicle I drove never saw 2000 rpm... Mack dump truck. It's all about the application, I'm thinking a twin turbo 911 probably drives a little different. (the 2 probably cost about the same tho)

 

I wouldn't have made the statement if it had not been true. YES, he works on a ton of fleet vehicles at that dealership. And wrong also about the torque on Ford's engines. BOTH the 2.7 and 3.5 ecoboost engines make their max torque at lower rpm's than the 5L V8. In fact, Both the 2.7 and the 5.0 are rated max torque at 400 lb-ft. But, The 2.7L hits 400 lb-ft at 2750rpm, while the 5.0 V8 hits 400 lb-ft at 4500rpm.

 

The Toyota 8AR-FTS (2.0L L4 Turbo) hits peak torque at 1650rpm. The "torquey" 4.0L 1GR takes until 3000rpm to hit the same value.



Jeff

 

Small turbo = fast spool = fast torque but bottlenecks itself at higher RPMs.

Big turbo = slow spool = slow torque but breathes better and gives massive top end power.

I sincerely doubt they're going to be targeting higher RPMs since this is a pickup - it will be 100% economy which benefits greatly from smaller turbos because, as was said, they quickly spool to deliver substantial torque down low where you need it day to day but when you let off, they ramp down and give pretty good economy.

To put it in perspective, last I checked, the 3.5L EcoBoost Ford uses two of the same K03 turbos as the VW 1.8T. They are freaking tiny little things but give massive torque where a truck needs it.

Personally, I'm on board with it and it makes driving an AT bearable. I had a 2.3L Eco in my Escape previously and that little thing had zero issues towing at its 3.5K limit while still getting me mid/low 20's around town.

 

I think you may be right. I’m going to really hate my 40s.

 

That's pretty low rpm. Thanks

 

So I stand corrected regarding low rpm torque in 4cly turbo engines. It seems they are pretty good at making power. My buddy has an F150 with the 2.7 ecoboost and although it makes good power, it sucks more petrol than his previous 5.0 coyote engine when towing. Also, what about the long term reliability of small engines working very hard over the years?

 

Rumour has it Nissan is replacing the VQ40DE with the VR30DDTT in the refreshed Frontier.

 

So the benefit of turboing a small engine is that it gets great mileage when it isn't in boost... Like going 70 mph in the interstate; it drives basically as a NA engine would that has the same displacement. When you start cramming air into an engine you have to feed it more or it will blow. So for instance, a vehicle that makes 200 up NA at 14.7 (14.7 psi is atm pressure at sea level) psi of boost will make 100% more HP because you are shoving 2x4 as much are in as it could take without FI. (You will actually get more go than that usually because you increase volumetric efficiency with a turbo but for easy math and stuff we will just say that its 2x for now) a unit of gasoline is onlyngood for x amount of energy so to get the energy needed to pull a load you need more fuel, also most tunes add even more fuel to keep the cylinder temps cooler under boost because when you compress air it heats up.

Tldr small engine no boost good gas mileage, small engine boost not great gas mileage

 

Also I dunno why I didn't use this as an example but the new ranger has a 2.3 4 cyl turbo and it smokes the 3.5 and would probably do the same with the 4.0