Toyota Supra GR Also Makes More Power Than Claimed in Europe

BrettS

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Another dyno vid



https://www.autoevolution.com/news/...more-power-than-claimed-in-europe-135599.html

Ever wondered how the Toyota Supra is faster than a BMW M2, even though it has less power? Well, it turns out Toyota wasn't being honest with the output numbers.

This video from the UK's popular YouTube channel Car Throttle directly targets the European version of the 2020 Supra. What's the difference? Well, it's somehow supposed to have a lot less power than the American model at 335-hp (American and 369 lb-ft, which is 340 PS and 500 Nm over in Europe.

Those numbers might make owners feel short-changed compared to what its sister car, the BMW Z4, offers. However, a dyno test shows 376-hp and 410 lb-ft, which is 381 PS and 556 Nm of torque. Obviously, every car is going to be different, but the difference is about 10%. Explain yourself Toyota!

The dyno man says he's tested over a hundred M140imodels, which also have a 3-liter BMW turbo engine, and they also produce more than advertised, but not this much. With a remap, the Supra can make 450 horsepower, he says.

Tuning is obviously going to be important with a car like this, and Car Throttle points out how Toyota deliberately left room for extra vents to be opened and new suspension installed. This is, of course, the upcoming GRMN track version we are talking about.

It is quite fast already, but the driving emotion just isn't there. We've recently talked about how the steering rack and manual gearbox in the Toyota GT 86 make it more engaging. Of course, people don't buy enough of those, so Toyota is right in chucking an automatic.

Super-fun or not, we still think it's going to do well, considering it looks so bold, and there are many tuners specializing in the BMW inline-6 that can work their magic. Between this, the M2 Competition and Alpine A110, we feel spoiled for sport car choice.
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Jeff@Racer X Fab

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I see this dyno was just the rear wheels, compared with the other awd dyno runs. Maybe I've missed it but it looks like there is a way around the traction control system?
 

Goose

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They also did the dyno run in 5th, like C&D did
 

dgh

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This dyno seems to be different in another way as well, as it must reporting crank horsepower, rather than wheel horsepower. The number, 375, couldn't possibly be wheel horsepower. It must convert wheel power to crank power in the reading.
 

zakira

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It could be in PS. But then it's still high.
 

Saeedali78

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This dyno seems to be different in another way as well, as it must reporting crank horsepower, rather than wheel horsepower. The number, 375, couldn't possibly be wheel horsepower. It must convert wheel power to crank power in the reading.
They wrote BHP in the video, so...
 

s219

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These types of dynos can only measure wheel horsepower. The operator can make assumptions about drivetrain loss to estimate the crank horsepower from the wheel horsepower.
 

s219

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This dyno seems to be different in another way as well, as it must reporting crank horsepower, rather than wheel horsepower. The number, 375, couldn't possibly be wheel horsepower. It must convert wheel power to crank power in the reading.
You never know. My X3 M40i (with B58) is rated by BMW for 355HP at the crank. Yet Dinan measured more than that at the wheels, and they estimate the crank horsepower to be 445HP. It means BMW seriously understated the power of the motor. That is very common for BMW nowadays.
 

MA617M

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PS = 0.735kW
HP = 0.746kW
BHP = 0.746kW

But as mentioned, wheel torque is measured, converted to power, and then assumptions made for engine power levels.
 

Toyotawild

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This is interesting. This makes power with the higher b58D model in the u.s. spec z4.
 

Toyotawild

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If I had to guess this turbo would really like a couple more psi than what it's at stock. Stock is 10-11 psi estimated. I'd imagine it's more in its efficiency range around 12 to 18 psi. After that I'm sure it blows hot air.
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