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Originally Posted by dmrowe  I agree but you have to do your tuning and measurement somehow and the best measuring device we have at present is a dyno. I think if you look at the torque and HP lines comparing the two different charts there is an overall gain in HP and torque in the mid range, just to be on the safe side when I had the tuning done I reduced the counter-shaft sprocket by 2 teeth. With the additional elimination of weight and rotating mass I have more than made up for any loss of torque. |
The dyno is not the best device to measure.. it does make the prettiest paper to look at however.. In theory yes your program works, but in the real world it comes up short..
sure you can tune and measure all you want... the real test is on the track..
you can not drag race on a dyno.. dont care what anyone says, I have seen more than one absolute dyno killer motor get pasted by an "also ran" motor..
sure you can optimize your combo on the dyno, but when it comes to the track? I have never seen a motor or combination perform its best until it has been tweaked on the track.. not saying you can not get it close..
Then you can then go back on the dyno and see where your tuning moved the power curve.. Vehicle and engine acceleration just can not be measured accurately in a static environment..
let me put it to you like this..
IF and that is a
big IF the dyno was such a panacea of performance tuning... dont you think you would see the heavy hitter drag race teams with them at the track? really... they could make 4 or 5 pulls, tune the motor for the air and head right for eliminations...
They dont, because it doesnt work.. (and I for one am glad, it would take the fun out of racing)
and before anyone says "it is cost prohibitive" ... take a stroll through the pits at an NHRA national event.. you have privateer guys with a $20,000-$250,000 race vehicle with $500,000 truck and trailer just to drag it around..
These guys are dead serious about winning, if it worked, they would have it so fast your head would spin...