BlackVert said:it is definately a percentage, not a static number. what is your combo anyway
300/.85 = 352
*edit*
http://www.superstang.com/horsepower.htm
Black95GTS said:Adding more HP does not equate to proportional increase in drive train loss.
F=MA
For drive train loss to increase at the same percentage as horse power increases, acceleration would have to increase linearly, assuming the tranny doesn't change.
The faster you accelerate the drive train, the more power you need. The power needed increases faster then the drive train acceration.
if you add 135 fwhp you accelerate the drive train fast enough for roughly a 3 second drop in ets (300 rwhp at high 11s/low 12s).
If you add another 135 fwhp, you WILL NOT accelerate the drive train fast enough for another 3 second drop. At least, I've never seen a 485 fwhp car in the 9s.
Because drive train acceleration doesn't increase linearly with power, applying a flat percentage is bunk.
- Adam
very true, more support that the the idea that there is a fixed hp loss through the drivetrain doesn't hold water. that is essentially what john's article says; the resistance through the drivetrain increases as more hp is applied to it.Black95GTS said:Adding more HP does not equate to proportional increase in drive train loss.
F=MA
For drive train loss to increase at the same percentage as horse power increases, acceleration would have to increase linearly, assuming the tranny doesn't change.
The faster you accelerate the drive train, the more power you need. The power needed increases faster then the drive train acceration.
if you add 135 fwhp you accelerate the drive train fast enough for roughly a 3 second drop in ets (300 rwhp at high 11s/low 12s).
If you add another 135 fwhp, you WILL NOT accelerate the drive train fast enough for another 3 second drop. At least, I've never seen a 485 fwhp car in the 9s.
Because drive train acceleration doesn't increase linearly with power, applying a flat percentage is bunk.
- Adam
final5-0 said:I have to say I agree with your thinking
But for stick combos you see the most of on these boards in the 300 range give or take a little ..........
15% is usually not too far off the mark.
Again ... auto trans combos and high hp combos are gonna be farther from that little ballpark judgment method.
Grady
bimmertech said:i have debated this very topic in detail and i will always support the 30hp loss--not percentage.
final5-0 said:Ben
Are you saying a 330 fw combo puts 300 to the wheels
Grady
bimmertech said:for me people can talk about mass and force and resistance and all that stuff i don't care about, what it boils down to me is i see too much evidence that supports my(and few others) theory.
SWYZ721 said:Yes, you are using empirical evidence which is all well and good, but using the same logic I don't know if China exists because I've never SEEN it.
Black95GTS said:
Facts are facts. I'll argue Newtonian physics with you all day but if the guy who works on engines for a living notices a consistent trend, I'm not going to ignore it.
Adam