i know but it would be a simple equation to correct the input that it is receiving to output the correct horsepower value
it wouldn’t be a constant number across the board
HOLY JEEBUS
The only true way to see what hp/tq a motor will produce is with an engine dynamometer. period. Chassis dynos are just general ideas of power(there are too many variables that can change output numbers).
SO, with drivetrain loss and tires and ever other variable in the world, the ONLY TRUE WAY TO GET ACCURATE AND RELIABLE POWER NUMBERS is by way of an engine dyno.
GOOD engine builders dont build an engine and throw it in a car to dyno it. they spend millions of dollars on dyno rooms and engine dynos and some(F1 teams and the like) even spend millions more on dynos that are set up to actually simulate the entire track they will racing on(complete with correct G forces and turn angles, etc)
I think a mod needs to make a second thread to put all the Dyno discussion in.
This side topic is not fair to STM’s thread but it is a very informational discussion.
The meet already happened, they’re just getting free bumps from this. It’s not like it’s hurting the potential turnout or anything.
Read Nikuk & Harvboi’s post or forever be ig’nanttttt
People who may have skimmed over this (or have no understanding of the talk) may interpret STM’s dyno as “inadequate” or “not as good as other dynos.”
Its no big deal, its just pretty OT from the vendors original intent of the post. It wouldn’t hurt either way.
i dont think that STM’s dyno is “inadequate” or “not as good as other dynos” there was one point where brians del sol which put down 434 on the dynapack which was tuned by a professional honda tuner who could calibrate it correctly as where when whoever was dyno’ing his car had the calibration off…i remember him telling me on the phone that when his car was at 8200rpm’s that it said 6200rpm’s on the dyno… i think thats one of the main reasons it read off so much personally…i think their expertise with DSM’s is awesome… do i think they will learn more into honda’s and other brands of cars…yes… i dont think that they have had the chance to have many honda’s on the dyno yet…do i think STM does great work…yes… look at my buddys evo which they just put together for him…it put down over 400 on their dyno and ran 11.1@126
Haha, im not saying its inadequate (and I hope everyone understands the concept of how dynos read) … thats what this entire argument was about proving kind of… Its how the topic got pretty far away from a paying vendors intent of post.
The dyno was right and ran perfect in every way. The reason the rpm’s in the car and dyno rpms did not match was because his clutch let go. Pretty easy explanation…
-Em
Mustang Dynos are almost universally accepted as the best Dyno to tune with. Nothing wrong with that at all, I would imagine thats why a tuner would get one. Ability to steady state tune > other chassis dynos.
i dont recall his clutch slipping, but i do remember someone saying the tach was bouncing around and that was due to it having an ignition cut for rev limiter
mustangs and dyna-pack dyno’s are both capable of this,
one could say they like mustangs better because the car is ran like it is on the street (with tires and rims on)
another person could say they like dynapacks because they don’t have to worry about the tires breaking loose on high horsepower cars, as well as not having to worry about strapping a car down
i think (know) too many times people worry about theory more than practice. the dyno will do it’s job, and that’s that
^^not even close to being true.
the fact that they specialize in dsms/evos has absolutely nothing to do with that honda running lower numbers than it did on the dynapack. thats absolutely rediculous. their dyno is arguably more accurate now than it will ever be.
dynos dont care what is spinning the rolls/hubs; it could be a gt35 evo, or a herd of bison running in unison. the dyno sets apply resistance against whatever or whomever is trying to spin the rolls.
the issue is 2500lbs on a mustang dyno is different than 2500lbs on a dynapack. hell, 2500lbs is even different between two identically manufactured dynos. to find out what can be done to eliminate that issue read my other posts.
its the shape of the curve, and change of curve between calibration/set up adjustments thats important, not the measured numerical value. thats why STM got the dyno, to easily validate product improvements and calibrations for their customers with before and after comparisons of the same car on the same dyno with the same road load coefficients, without even leaving the building. not to compare to another dyno thats probly been run for ten years, has shot bearings, and hasnt been calibrated since it left the manufacturer.
stop comparing numbers between dynamometers because it is down right incorrect.
i bet that honda traps the almost the same on any tracks in the country similar in elevation and climate. just cause there is a difference in measured power doesnt change how much power actually it makes.
who cares how much power a vehicle makes the first run on the dyno. the second run with higher numbers is the important run; only because the numbers are higher! either way its still sounds cool and is fun to watch! especially at a sweet shop right down the street :headbang:
Ah. Didnt realize dynapack was able to effectively brake the drivetrain.
works a bit differently than the mustang, but the overall end product is the same, both can be used to tune partial throttle, idle, full throttle, basically completely tune the car
and for the haters that say no tires/rims make a difference i would beg to differ, a/f ratios are dead accurate from datalogs from the dynapack to the street
:picard:
If you really care how much power you’re making, use a formula based on components non relevant to “measured” torque and horsepower
In the end, i would rather have the best tuning tool than the most accurate numbers