Originally Posted by
Fabrik8
What does bench racing have to do with anything? You're going all over the place here. I'm not sure why we're arguing because I have no clue what you're actually trying to say..
I'm still a little confused on what you're trying to say here.. It sounds like you're saying that dynos aren't worthwhile when measuring power after making modifications.. Would you rather see the power gain or loss on a nice accurate dyno graph, or try to figure out how much power (and where in the 3 dimensional world of load vs. RPM) you've gained or lost by taking it to the strip? You should be tuning for the new mods on the dyno way before going to the strip anyway.
My point is that it's better to actually measure power improvements that try to feel them by the seat of your pants at the track. A dyno can have corrections applied for changes in ambient conditions, that's a lot harder to do at the track AND throw human driving error into the mix..
I agree and understand your point. Dynos are one of the easist way to measure gain or in some cases loss, but it doesnt mean they are the Gold Standard. In fact there really isnt one. Like I have said numerous times...Dyno in conjunction with Track are what should be used to determine how well it is performing.
For example...Person A dynoed 360 whp but ran 12.xxx at 112 mph. Person B dynoed 352 whp but ran 12.xxx at 116 MPH. please keep in mind same car with almost exact mods adn dynoed at the same place on same day. Race took place at same track against each other.
The 12.xxx ETs is important, but for the sake of this argument I will throw it out since we all know there are many factors that affect that number.
But looking at the trap speed obviously something is wrong with Person A's car when comparing the results with Person B.
Ideally if you plug in all of the variables in a dyno...you should get the exact reading. But in practice that is rarely the case. Most shops/dyno centers just throw the car up, do 2-3 pulls and then gives you a readout of WHP, TQ, and/or AFR.