Engine power.. Can some please explain this?
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Lexus Champion
Joined: Sep 2006
Posts: 2,025
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From: MIchigan
Engine power.. Can some please explain this?
I am no engine wizard. I know enough about cars but not enough about the engineering that goes into them.
Please can someone explain this.
Why is the Tundra 4.7 litre engine rated 271hp and 313 lb pounds of torque while the LX/LC100 4.7 litres rated at 268hp and 328 lb pounds of torque. Both engine make their peak power at the same RPM.
Shouldn't the LX have more hp because of the higher torque? Both are SAE certified.
Can someone please explain what accounts for this difference? Is it premium fuel? Different spark plugs? would fuel, plugs etc factor in?
What is it..please someone help?
Please can someone explain this.
Why is the Tundra 4.7 litre engine rated 271hp and 313 lb pounds of torque while the LX/LC100 4.7 litres rated at 268hp and 328 lb pounds of torque. Both engine make their peak power at the same RPM.
Shouldn't the LX have more hp because of the higher torque? Both are SAE certified.
Can someone please explain what accounts for this difference? Is it premium fuel? Different spark plugs? would fuel, plugs etc factor in?
What is it..please someone help?
Torque and horsepower are equal to each other at 5252rpm, but peak horsepower is not always at 5252rpm.
I dont know what exactly goes on in the Tundra/LX470, but the difference could be the tuning in the ECU. The Tundra requires regular 87 octane fuel while the Lx470 requires 91 octane. Perhaps the LX470's timing is more advance than the Tundra, which would warrant the premium fuel that's required. Other than that, the engine should be identical.
I dont know what exactly goes on in the Tundra/LX470, but the difference could be the tuning in the ECU. The Tundra requires regular 87 octane fuel while the Lx470 requires 91 octane. Perhaps the LX470's timing is more advance than the Tundra, which would warrant the premium fuel that's required. Other than that, the engine should be identical.
Thread Starter
Lexus Champion
Joined: Sep 2006
Posts: 2,025
Likes: 0
From: MIchigan
Torque and horsepower are equal to each other at 5252rpm, but peak horsepower is not always at 5252rpm.
I dont know what exactly goes on in the Tundra/LX470, but the difference could be the tuning in the ECU. The Tundra requires regular 87 octane fuel while the Lx470 requires 91 octane. Perhaps the LX470's timing is more advance than the Tundra, which would warrant the premium fuel that's required. Other than that, the engine should be identical.
I dont know what exactly goes on in the Tundra/LX470, but the difference could be the tuning in the ECU. The Tundra requires regular 87 octane fuel while the Lx470 requires 91 octane. Perhaps the LX470's timing is more advance than the Tundra, which would warrant the premium fuel that's required. Other than that, the engine should be identical.
Driver
Joined: Sep 2007
Posts: 134
Likes: 0
From: Illinois
They might lose different amounts of Hp/torque through the rest of the drive line. If they have the same engine, they probably will have different drive line set-ups, and different cars lose different amounts of energy through the diff, trans, driveshaft, etc...
Oh, btw, not ALL cars torque peak at 5252 RPM, the Dodge Viper peaks at like 2800 RPM
Oh, btw, not ALL cars torque peak at 5252 RPM, the Dodge Viper peaks at like 2800 RPM
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Lead Lap
Joined: Jun 2004
Posts: 543
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From: Alabama
its either driveline loss or exhaust design ... why does it matter anyways? the difference is so minimal. Which vehicle is faster? this depends entirely on which one weighs less (i would guess the tundra)
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