![]() |
#1 |
![]() Join Date: Nov 2011
Location: Dunbarton NH
Posts: 7,340
|
![]()
So, in round numbers.... if in fourth gear, 1:1 ratio, I dyno at 400 hp, if first gear is .5:1 do I effectively get 800 hp to the rear wheels?
![]() |
![]() |
![]() |
![]() |
#2 |
![]() Join Date: Feb 2011
Location: San Marcos CA
Posts: 1,802
|
![]()
hp is derived from torque so since the gear multiplies torque, 5 times, but the speed is 5 times slower, the hp should be the same.
I think you knew that, but there is some discussion of 3rd gear vs 4th gear dyno pulls and there is sometimes a few hp difference depending on drivetrain friction or dyno operation. I can't explain it, but it does skew a couple of percent depending. |
![]() |
![]() |
![]() |
#3 | |
![]() Join Date: Jun 2005
Location: CenCoast California
Posts: 899
|
![]() Quote:
As for running in third or any gear other than direct drive, the hp is usually a little less because reduction or overdrive gears have slightly more loss in the transmission.
__________________
Hib Halverson Technical Writer former owner 95 VIN 0140 current owner 19 VIN 1878 |
|
![]() |
![]() |
![]() |
|
|