Engine HP verses RWHP...
Le Mans Master
Joined: Aug 1999
Posts: 5,411
Likes: 2
From: N Carolina 08 Z51 Coupe
RWHP show how much power is being delivered to the wheels. This takes into account all drive train losses.
Engine HP is measured at the flywheel. Depending on when it was tested and under what SAE guidelines, it may or may not include accessory drag. RWHP is usually more meaningful to modders
Engine HP is measured at the flywheel. Depending on when it was tested and under what SAE guidelines, it may or may not include accessory drag. RWHP is usually more meaningful to modders
Melting Slicks
Joined: Oct 2006
Posts: 2,905
Likes: 1
Engine HP is measured power directly from the engine with no drivetrain loss. Wheel HP is measured with drivetrain loss(transmission,etc). There is usually a 12-20% reduction from engine to wheel HP readings depending on the transmission .Most car co. state engine or BHP when selling you their cars.
Racer
Joined: Aug 2000
Posts: 384
Likes: 0
From: Las Vegas
Engine HP is measured based on the power the engine produces prior to running through the drive train (transmission/rear end). You lose HP at the drive train, more on an auto transmission than on a manual. Thus Rear Wheel HP is a measurement of what your car can put down to the street in terms of HP and Torque rather than the HP/Torque that the engine can measure on a bench in the shop.
For instance, on an '07 C6, the engine HP is rated at 400HP. The RWHP might be closer to 360+/- depending on build tolerances during engine manufacturing and whether the car is a manual or automatic.
Does that help?
For instance, on an '07 C6, the engine HP is rated at 400HP. The RWHP might be closer to 360+/- depending on build tolerances during engine manufacturing and whether the car is a manual or automatic.
Does that help?
Pro
Joined: Dec 2001
Posts: 734
Likes: 0
From: Fishers Indiana
Your car has 450 rear wheel horse power and 400 rear wheel torque. Also your transmission is an RPM StageV that has been fully micropolished. The rear differential is also fully micropolished so your drivetrain loss will definitely be on the minimal side. Perhaps thats why your car (at the time) was the strongest head/cam car LPE had done to date.
Here's a video of the day it left LPE: http://www.youtube.com/watch?v=XwMitMT_FkY
Last edited by BoilerRxC6; Oct 19, 2007 at 09:43 PM.
Thread Starter
Melting Slicks
Joined: Aug 2007
Posts: 3,213
Likes: 397
From: Indianapolis IN
Your car has 450 rear wheel horse power and 400 rear wheel torque. Also your transmission is an RPM StageV that has been fully micropolished. The rear differential is also fully micropolished so your drivetrain loss will definitely be on the minimal side. Perhaps thats why your car (at the time) was the strongest head/cam car LPE had done to date.
Here's a video of the day it left LPE: http://www.youtube.com/watch?v=XwMitMT_FkY
Here's a video of the day it left LPE: http://www.youtube.com/watch?v=XwMitMT_FkY
I love the way they feel and sound through the exhaust note.Have you taken the Z to LPE?
Pro
Joined: Dec 2001
Posts: 734
Likes: 0
From: Fishers Indiana
http://www.youtube.com/watch?v=VmreDg3DF4k
Hey, I'm at a buddies house on 96th and Westfield. We are leaving for Putnam Park in Greencastle for the corvette vs porsche shootout. I know it's short notice, but you should come out. It's gonna be a great day. Give me a call if you want. 812-887-8697 Here's a link to Putnam Parks website for more info: http://www.putnampark.com/
Last edited by BoilerRxC6; Oct 20, 2007 at 08:19 AM.
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Pro
Joined: Dec 2001
Posts: 734
Likes: 0
From: Fishers Indiana
