00' WS6 T/A

The other night, I got into an argument with my roomate about what effects dyno results and also he said that HP means nothing. Torque is everything in a car and you dont even need any HP. Please post what you all think about the two subjects.........Later

DynoDR

iTrader: (1)

HP is just TQ referenced by RPM. You know HP=TQxRPM/5252.

You cant have one without the other.

383LQ4SS

iTrader: (33)

right...but TQ is the ONLY thing that can be directly measured. Thats why people say that TQ is everything. You can directly measure a TQ value.

HP will always be derived from atleast two factors...wether TQ and rpm, rpm and time, etc etc...but it will always be two.

black97ss

iTrader: (6)

dyno effects can be my temperature, humidity, a/c on or off, sea level, texas dynoes wayy higher than like colorado etc. and torque and hp go hand in hand just as what was said

Redline-Motorsports

iTrader: (3)

Thats why we try to dyno with as close to same conditions "as" possible. This at least removes some of the variables. The key to properly using a dyno is to stay with the same dyno as you build you project. No two dynos read the same so its tough to internet compare all the time. We have a Dyno Dynamics Eddy current brake dyno in which it incorporates an actual torque sensor. It really measures torque as opposed to calculating it out through a rotating mass. This "true" reading and referenced with the injector pulse (for rpm signal) really increases repeatablity and accuracy!

dynocar

If the dyno is properly operated using the normal SAE 1349 Rev 90 correction factors, this negates any differences in dyno elevation and atmospheric condition differences.

Redline-Motorsports

iTrader: (3)

dynocar,

What does SAE define as the 1349 Rev 90 correction factor values?

dynocar

Air 77 deg F, Bar pr 29.235 "Hg absolute, humidity 0%.