fastdream

cool article about estimating hp with the 1/4 mile runs and other interesting insight about the 1/4 mile.<ul><li><a href="http://www-unix.oit.umass.edu/~tcroy/articles/15dollardyno.htm">http://www-unix.oit.umass.edu/~tcroy/articles/15dollardyno.htm</a</li></ul>

xr4tic

As long as it doesn't rain.

My previous run of 104mph would indicate 325hp using a weight of 3450 (including me), even though my ET was only 13.9 (bad clutch)

Dave Griswold

And using your gut, how accurate do you think that is?

xr4tic

At the time of my run, I would've guessed my car was in the 300-320 range, so it's probably on the high side of the range.

He came up with the calculation by using dyno numbers and timeslips from a lot of cars.

It's probably more of an indicator of wheel HP, because a car with more drivetrain loss, or taller gears, will post lower MPH numbers

So it's a ballpark figure, but it's still a better indicater than using the ET method.

It would be good for comparing HP between similar cars though, like comparing A4/S4 to each other, but not an A4/S4 to Honda Civic.

If we could get a lot of timeslips and dyno numbers, we could probably come up with our own calculation.

AggregatVier

Is there a weight scale right at the track?

xr4tic

I don't know, but i'll find out.