Quote:
Originally Posted by mrray13
BS. If I dyno in a lower gear, my numbers go way up, 8-10rwhp UP. Torque is increased down in lower gears, and that's what is measured. Then the computer does the math to figure the horsepower.
Seriously. If that wasn't the case, then why aren't all our cars a single speed 1:1 ratio from the get go? If the lower gears eat up so much power, why have them? Torque multiplication, that's why. And that's why lower gear horsepower numbers tend to be higher then the 1:1 ratio.
Really? MY v6 Camaro runs 9.0-9.1s in the 1/8th, it's an auto. I quit spinning and fix my timing, I'm knocking on that Mustang GTs door. I seriously doubt I can outrun an L99 by half a second, when I know for a fact the LS3 gets me by several tenths, and he was trapping 88mph+. So, where is it.....there it is...  |
Post your dyno sheets then, show me these lower gear run's that you've done.
dyno's DO NOT read tq and factor in HP. it's the opposite. Otherwise a car with better rear end gears would always dyno higher. and that is not the case. If you leave off the ignition source to read RPM, the dyno will still pick up what the HP is, it just can't calculate tq, and will print out an HP graph based on speed (MPH).
another example is if a car reads 300 rwtq on a 1:1 ratio, then if the dyno really did go off of rwtq, a gear ratio of 1.4:1 would read 420 rwtq. I don't see any dyno graphs being anywhere near that off. Do you? if so, please post.
4th gear or whatever 1:1 is is generally used because it has the least parasitic losses (higher rwhp) and it also gets the best reading.
EDITED to remove some harshness.