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Hey guys I put my 2012 C63 on the Dyno this week. Stock car with Eurocharged V5 tune in it only made 351rwtq. I can't figure out if it was measured incorrectly or that is a common number. Can y'all share your results please.
i dont have a shelf tune but my wheel numbers were 416hp/394tq on a mustang dyno, only mods are resonator and charcoal delete. sounds like something is wrong
These cars power seem to be all over the board on dynos. Take it to the track and see what she does. They always seem to trap about the same mph regardless of dyno numbers.
These cars power seem to be all over the board on dynos. Take it to the track and see what she does. They always seem to trap about the same mph regardless of dyno numbers.
^^^^this^^^^
Also keep in mind that the air itself DOES MATTER!!!!!
uncorrected dynos in BAD DA can really make a difference.... I dynoed my 426 SRT jeep at 730am in Jacksonville, FL and then again when I got to Virginia about 9hr later and made.....76rwhp LESS......and the only difference was 8°F warmer and ****ty DA....Same dyno, zero correction on both
But if your hp numbers were good, as you say, what were they at 5252rpm on the graph??? Was the tq low the entire pull or did it die off after 5252? If hp was that high i would assume that tq had to have been decent as to get to that level of hp it would be relatively high up in the rpm range....
Ok, per your graph your dyno numbers CANNOT be right(assuming that the right side of the chart is the upper rpm band)....per the laws of mathematics HP and TQ are always equal at 5252rpm.....if they are not then SOMETHING is off on the graph
Your
graph SHOULD look something like this, with the two axis crossing....I know in mine the crossover appears to happen at about 4,750ish but keep in mind that the program doesn't read at the same speed that the engine can actually spool up....so if at 5,252 you were making 400lb/ft of tq you would ALSO be making 400rwhp.....but in your graph we can't see the engine speed
Also If you notice my graph is NOT the same on the left (HP) as it is on the right(tq) the left side of the graph increase less than the right as rpm increases.... Yours is the same on both sides
Your
graph SHOULD look something like this, with the two axis crossing....I know in mine the crossover appears to happen at about 4,750ish but keep in mind that the program doesn't read at the same speed that the engine can actually spool up....so if at 5,252 you were making 400lb/ft of tq you would ALSO be making 400rwhp.....but in your graph we can't see the engine speed
Also If you notice my graph is NOT the same on the left (HP) as it is on the right(tq) the left side of the graph increase less than the right as rpm increases.... Yours is the same on both sides
Your crossover appears to happen at 4,750ish, but it's just because the scales on Tq and HP are different. If you look closely, you'll see that at 5,250rpm your Tq and HP are both at about 360. If the scales were the same, the crossover would show up at exactly 5,252.
Your crossover appears to happen at 4,750ish, but it's just because the scales on Tq and HP are different. If you look closely, you'll see that at 5,250rpm your Tq and HP are both at about 360. If the scales were the same, the crossover whoul show up at exactly 5,250.
You are right, I should have caught it.....I assumed it was due to lag between ecu and dyno pc
This is definitely a first for me, a c63 dyno graph where the hp and tq don't cross.
Something definitely went wrong when dyno-ing and the 351wtq is inaccurate. It just has to be...
I'm surprised the tuner / whoever dyno'd your car didn't pick up on that and run it again or have some type of discussion with you about it. Do you have any other good shops in your area with a dyno? I'd recommend switching shops and seeing if you get the same results or something different.
Comparing dyno numbers is completely useless, unless you're using the same correction, SAE correction. Which lots of guys don't like to use because it shows lower numbers than other forms. SAE is the standard.
You guys comparing dyno numbers is completely useless unless you're using the same correction, SAE correction. Which lots of guys don't like to use because it shows lower numbers than other forms. SAE is the standard.
Ps dyno numbers don't mean diddly squat.
*gasp*
Trying to explain this in multiple threads has me spinning. However, something we can agree on in this thread is that the chart doesn't make much sense, either.
Have you ever seen something like that? Hp/tq never touch?
You guys comparing dyno numbers is completely useless unless you're using the same correction, SAE correction. Which lots of guys don't like to use because it shows lower numbers than other forms. SAE is the standard.
Ps dyno numbers don't mean diddly squat.
I typically only find dyno numbers useful for tuning purposes and maybe judging any gains with mods...but only on THAT car...you really can't compare car to car
Your crossover appears to happen at 4,750ish, but it's just because the scales on Tq and HP are different. If you look closely, you'll see that at 5,250rpm your Tq and HP are both at about 360. If the scales were the same, the crossover whoul show up at exactly 5,250.
Trying to explain this in multiple threads has me spinning. However, something we can agree on in this thread is that the chart doesn't make much sense, either.
Have you ever seen something like that? Hp/tq never touch?
Nope, that was why I asked about the numbers at 5252 originally.....the high tq would HAVE to have equated a high HP number if done right
Trying to explain this in multiple threads has me spinning. However, something we can agree on in this thread is that the chart doesn't make much sense, either.
Have you ever seen something like that? Hp/tq never touch?
Ya I've seen charts like that before and it's a problem with the pick up for the ignition, it doesn't get the rpm correct or something.
It's impossible to have a dyno graph that is correct where torque in ft lbs doesn't intersect horsepower at 5252rpm.
A dyno is a useful tool for tuning purposes, making changes and seeing the result while the vehicle is still on the machine.
If you want to see if you're making more power after a mod, head to the track and watch your mph. Having said that, air quality comes into play. You can also correct for this or try get a day with similar DA.
01-17-2016, 02:15 AM
