rear wheel hp = motor hp
08-27-2007, 04:16 PM
#1
12 Second Club
Thread Starter
Join Date: Aug 2007
Posts: 98
Likes: 0
Received 0 Likes
on
0 Posts
rear wheel hp = motor hp I just had my car put on a chasis dyno and the car produced 392 hp at the rear wheels. Is there a calclation to convert rear wheel hp to motor hp? I just want to know how much motor hp i have. Thank in advance for any help.
08-27-2007, 05:21 PM
#6
TECH Enthusiast
iTrader: (12)
Join Date: Sep 2004
Location: Danville, VA
Posts: 684
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by davered00ss
rule of thumb is 15-18% for drivetrain loss.
392/.85=461
Trending Topics
08-27-2007, 05:40 PM
#9
12 Second Club
Thread Starter
Join Date: Aug 2007
Posts: 98
Likes: 0
Received 0 Likes
on
0 Posts
Thanks everybody for the fast response. I was feeling pretty low once I saw my rear wheel hp reading today after I had my car chassis dynoed. I feel alot better knowing my motor has around 480 to 490 hp. I'm going to the track tommorow to try and get into the 11 second club. Wish me luck, I wil need it.
08-27-2007, 09:54 PM
#11
It's more of a set number for drivetrain loss than it is a percentage. More like:
(HP required to turn part)*(X% lost due to friction and binding) so those who say it's a percentage are nuts. Let's make the numbers easy for discussion's sake. If it's a straight percentage, then if a TH350 is 10% loss, it takes a 300hp car 30hp to turn it, but it takes a 1000hp car 100hp to turn the same part? That's just silly thinking.
(HP required to turn part)*(X% lost due to friction and binding) so those who say it's a percentage are nuts. Let's make the numbers easy for discussion's sake. If it's a straight percentage, then if a TH350 is 10% loss, it takes a 300hp car 30hp to turn it, but it takes a 1000hp car 100hp to turn the same part? That's just silly thinking.
08-27-2007, 10:08 PM
#12
Launching!
iTrader: (10)
Join Date: Jun 2007
Location: TN
Posts: 247
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by N4cer
It's more of a set number for drivetrain loss than it is a percentage. More like:
(HP required to turn part)*(X% lost due to friction and binding) so those who say it's a percentage are nuts. Let's make the numbers easy for discussion's sake. If it's a straight percentage, then if a TH350 is 10% loss, it takes a 300hp car 30hp to turn it, but it takes a 1000hp car 100hp to turn the same part? That's just silly thinking.
(HP required to turn part)*(X% lost due to friction and binding) so those who say it's a percentage are nuts. Let's make the numbers easy for discussion's sake. If it's a straight percentage, then if a TH350 is 10% loss, it takes a 300hp car 30hp to turn it, but it takes a 1000hp car 100hp to turn the same part? That's just silly thinking.
08-28-2007, 12:50 PM
#13
TECH Enthusiast
iTrader: (9)
Join Date: Apr 2005
Location: Central TX
Posts: 699
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by 93redBIRDman
Manual
392 / .85 = 461hp
Auto
392 / .80 = 490hp
Obviously these are just ballpark guesses...
392 / .85 = 461hp
Auto
392 / .80 = 490hp
Obviously these are just ballpark guesses...
08-28-2007, 12:58 PM
#14
12 Second Club
iTrader: (4)
Join Date: Sep 2005
Location: Fort Myers, FL
Posts: 589
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by N4cer
It's more of a set number for drivetrain loss than it is a percentage. More like:
(HP required to turn part)*(X% lost due to friction and binding) so those who say it's a percentage are nuts. Let's make the numbers easy for discussion's sake. If it's a straight percentage, then if a TH350 is 10% loss, it takes a 300hp car 30hp to turn it, but it takes a 1000hp car 100hp to turn the same part? That's just silly thinking.
(HP required to turn part)*(X% lost due to friction and binding) so those who say it's a percentage are nuts. Let's make the numbers easy for discussion's sake. If it's a straight percentage, then if a TH350 is 10% loss, it takes a 300hp car 30hp to turn it, but it takes a 1000hp car 100hp to turn the same part? That's just silly thinking.
08-28-2007, 12:59 PM
#15
12 Second Club
iTrader: (4)
Join Date: Sep 2005
Location: Fort Myers, FL
Posts: 589
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Medic/Z28
How could an auto make more power than a manual transmission? I thought thats why we all got manuals to get the most out of the motor. Please explain this so that my next car we be an auto.
08-28-2007, 03:10 PM
#17
TECH Resident
iTrader: (5)
Join Date: Sep 2006
Location: Long Island, NY
Posts: 822
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Boodyrider
Why? You taking just the motor for a drive?
IMHO, motor hp is totally irrelevant.
IMHO, motor hp is totally irrelevant.
08-28-2007, 03:50 PM
#19
TECH Fanatic
iTrader: (2)
Join Date: Jan 2006
Location: Indianapolis Indiana
Posts: 1,299
Likes: 0
Received 0 Likes
on
0 Posts
+1 on it being a static % is ludicrous, saying 15% loss for a manual means if i have 460 FWHP im at 400 RWHP, but if i'm at 1000 FWHP i'm losing over 150 HP to turn the same components? Bah this thread can get ugly lol
08-28-2007, 04:05 PM
#20
On The Tree
iTrader: (5)
Join Date: Apr 2007
Location: ERIE, PA
Posts: 115
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by N4cer
It's more of a set number for drivetrain loss than it is a percentage. More like:
(HP required to turn part)*(X% lost due to friction and binding) so those who say it's a percentage are nuts. Let's make the numbers easy for discussion's sake. If it's a straight percentage, then if a TH350 is 10% loss, it takes a 300hp car 30hp to turn it, but it takes a 1000hp car 100hp to turn the same part? That's just silly thinking.
(HP required to turn part)*(X% lost due to friction and binding) so those who say it's a percentage are nuts. Let's make the numbers easy for discussion's sake. If it's a straight percentage, then if a TH350 is 10% loss, it takes a 300hp car 30hp to turn it, but it takes a 1000hp car 100hp to turn the same part? That's just silly thinking.
