How much RWHP do we loss for each extra lb on the wheels?
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From: Viña del Mar, Chile
Porsche Turbo Stage 4, Cayenne S ... gone C43, C32, ML55 & Ducati 999.
How much RWHP do we loss for each extra lb on the wheels?
Hello everybody...
How much RWHP do we loss for each extra lb on the wheels?
I am looking to contrast the 18” AMG Style IV (33 lb) and the stock 17” AMG ones (27 lb) performance differences…
Thanks!
How much RWHP do we loss for each extra lb on the wheels?
I am looking to contrast the 18” AMG Style IV (33 lb) and the stock 17” AMG ones (27 lb) performance differences…
Thanks!
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Joined: Jan 2002
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Re: How much RWHP do we loss for each extra lb on the wheels?
Originally posted by Pierre32///AMG
Hello everybody...
How much RWHP do we loss for each extra lb on the wheels?
I am looking to contrast the 18” AMG Style IV (33 lb) and the stock 17” AMG ones (27 lb) performance differences…
Thanks!
Hello everybody...
How much RWHP do we loss for each extra lb on the wheels?
I am looking to contrast the 18” AMG Style IV (33 lb) and the stock 17” AMG ones (27 lb) performance differences…
Thanks!
MBWorld Fanatic!
Joined: Feb 2002
Posts: 1,038
Likes: 1
C32 AMG
Several years ago we did a test for a magazine on how many HP extra wheel weight losses.
To make a long story short, it took a full day of dynoying two cars with different sets of wheels. We came up with this rule of thumb:
On RWD for every additional pound going up 1 '' in size will take away about 0.7HP.
On FWD for every additional pound going up 1 '' in size will take away about 1 HP.
The reason FWD lose more power than RWD has to do with the fact that wheel weight is a bigger part of overall drivetrain weight.
RWD have long driveshaft and longer axle shafts that are also a part of the drivetrain.
Now you know.
To make a long story short, it took a full day of dynoying two cars with different sets of wheels. We came up with this rule of thumb:
On RWD for every additional pound going up 1 '' in size will take away about 0.7HP.
On FWD for every additional pound going up 1 '' in size will take away about 1 HP.
The reason FWD lose more power than RWD has to do with the fact that wheel weight is a bigger part of overall drivetrain weight.
RWD have long driveshaft and longer axle shafts that are also a part of the drivetrain.
Now you know.
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Joined: Jul 2002
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From: Oregon
C32AMG
In addition
Hp can be lost without adding wheel weight.If you install a larger
diameter wheel/tire package of the same weight,the increased inertia will eat a bit of power.This hurts on both ends;it will also slightly add to your braking load.
diameter wheel/tire package of the same weight,the increased inertia will eat a bit of power.This hurts on both ends;it will also slightly add to your braking load.
