Question About Horsepower

Keithbickford · Oct 27, 2019

Yodder J[OP] initial post: ↑

So Toyota claims my truck makes 381 horses from the factory. How come every dyno test I see on Tundras, in the threads about different after market tunes, show the stock Tundra falling way, way short of those numbers? How can Toyota claim 381 when in fact, it's not really even close to that number, more like sub 300 horses?

Enlighten me
Click to expand...

All car manufacturers measure the engine power at the crankshaft with the engine bolted to a stand.
Tuners measure power at the rear wheels using a rolling dynamometer.
The differences in power values are caused by driveline inefficiencies.

ZPMAN · Oct 27, 2019

Yodder J[OP] initial post: ↑

So Toyota claims my truck makes 381 horses from the factory. How come every dyno test I see on Tundras, in the threads about different after market tunes, show the stock Tundra falling way, way short of those numbers? How can Toyota claim 381 when in fact, it's not really even close to that number, more like sub 300 horses?

Enlighten me
Click to expand...

I measure my horsepower by the look on my younger brothers face.
https://youtu.be/iR3rXowPACQ

Cpl_Punishment · Oct 27, 2019

Batel said: ↑

There are some great explanations on this thread, my response won't be one of them. I had an f150 for 10 long years and the "Triton" advertised 300 hp and 450 lbs ft of torque. I looked everwhere, never found them. In fact my 1984 dodge d150 with 360 4bbl rated at 185 hp felt faster, and seemed to pull as good. With the Ford I always felt like I was back in the old Freightshaker and just had to make a hole in the interstate at the ends of on ramps. I seldom use more than half throttle on our short on ramps to get in the flow of traffic and at full throttle the Tundra will run off and hide from the Ford. Completely subjective but I never knew 81 hp would make that much difference.
Click to expand...

My grandfather had a similar experience with his 1985 W150 and his 1993 Chevy K1500. The Dodge would tow heavy trailers up muddy hills with little to no trouble while the Chevy would just spin.

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Question About Horsepower

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Keithbickford New Member

#32
ZPMAN 2nd place is the 1st looser

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Question About Horsepower

#31 Keithbickford New Member

#32 ZPMAN 2nd place is the 1st looser

#33 Cpl_Punishment Do unto others as they've done to you

Products Discussed in Entire Site Forum: General Tundra Discussion

#31
Keithbickford New Member

#32
ZPMAN 2nd place is the 1st looser

#33
Cpl_Punishment Do unto others as they've done to you

Products Discussed in