How did I dyno this high? (not that I am complaining)
 

I was at performance motorsports this weekend (great trip btw) and my original base was low 330's and after tune I was low 340s (can't remember if it was 342 or 343 but had a 10hp gain).

I have just the mods below...

Now listen I am not complaining but how is this possible? I have the sheet I can scan and upload once I hook up my scanner.

This was on a mustang dyno btw.

Factory freak!:ugh2:

Just checked... 343

That's like easily 35 hp more than what you would usually see... that is a big vartiation in my favor (again not that I am complaining).

I think it was an AWD dyno does that mean anything?

Could just be the type of dyno.
I just got dyno tuned last weekend on a 2wd dyno dynamics machine and I'm at 318.
But I was told that would be about 350(?) on a dynojet.
And of course, we all know that varies by temperature, humidity, etc.
So don't worry about it; just enjoy it. :driving:

Enron dyno.

Their dyno reads high. It's just a number anyways. Trap speed proves real horsepower.

Yeah I know it is all relative because each dyno is dif, I was just shocked that it was that high.

Eventually we will get to the track and do some runs.

PM dyno reads a bit high, I put down like 342 there last week, most people with bolt-ons/tune do the same.

I thought its just the NY/NJ air adds 30 horsepower, no ?

Inaccurate dyno. But that's my opinion. And opinions are like a$$holes. Everyone has one. My personal belief is that the dyno you got those numbers from has some real "issues" with "real-world" factors. Wheel weights, temperatures, altitude, and I could go on.

Let me say that IMHO, your numbers are very inflated. And There are endless arguments about these number "issues". In fact the only arguments that garner more responses (and emotions) are the oil threads.

So take your results for what they are. And try and grow some thick skin. You'll need it.

(That's why I never post my numbers or charts on this or any other forum. They cause too many arguments.)

:roflpuke2::bowrofl::icon18::inoutroflpuke::ugh2:

That is the funniest thing I've read on here in a long time!!

what exactly is funny about that factual statement regarding trap speeds and power?

Yeah, I'm confused. :confused:

Well, do you think that if I were to travel down a very long hill and reach a very high top speed; that I would deduce that my car has more "power" than someone who runs a short run on a measuring device? Like a dyno? Trap speeds are measurements like dyno runs. But trap speeds can be very deceptive.... as the example above proves.

:facepalm:

:iagree:

:wtf2:

Well the numbers weren't the point. My baseline was 333 and the tune brought me to 343 so that's a solid gain on the uprev. Whether I am truly at 343 or 315 or 295 really is irrelevant like everyone says since there is no universal dyno standard with identical atmospheric conditions.

At the end of the day my goal was the tune which went better than expected. I def wanna get some track nums tho.

Going by the baseline numbers, those values probably better reflect what you are making at the crank rather than what you are putting down...

What kind of dynamometer?

On a dynojet, that would probably be around 300 with those mods and a tune.

370Z's make mid to high 270's bone stock on a dynojet with SAE correction; higher if the Nismo.

I wouldn't say that all 370z's make that bone stock. When I did mine in NC on the coast about 20ft above sea level SAE corrected 285 is what I was doing on a Dyno Jet. The shop is very reputable and their dyno is on par with a domestic shop that is very reputable in my area as well. I wouldn't say 300 at the crank b/c 370z's are rated 332 at the crank off the assembly line. Do I think those numbers are a little high yes, we all agree on that even the OP. I agree with take it to the track and see what she does. Just my 2cents though.

Agreed with the above, Number are VERY infalted. Sounds like the had a HUGE correction factor.. When dynoing try to have them set the factor to or as close to 1 as possible to try to get "Real" World numbers .

By base I meant prior to tune. I still had my mods.

Nope the correction and uncorrected both showed. Corrected was around 5-8 HP higher so that doesn't explain it.

Just take it to the track man that is the best way to do it.

do you know of any 1/4 tracks that run down a hill? calculating hp by using the trap speed of a 1/4 mile run and your vehicles weight is very effective.

PM has a reputation for having inflated dyno numbers, Mustang dyno's typically read lower than Dynojet - but in their case it is higher :)

But anyway like you said it is the relative difference that matters and that the car feels better after the tune. Real world driving is the real test.

Really we get what we deserve as a community (car modders in general).

Most people just want to see high numbers on the dyno. It's what ultimately pays and makes a lot of people come back. They get work done at the same shop they dyno at, and they want to see a big number that compares well to other internet dyno numbers. So the numbers are constantly inflating at lots of shops due to tuning and tweaking of the dyno's parameters and little games of how you set up the run. In many ways this is like the conundrum of women's dress sizes. None of them make sense, and there's no direct comparison between any two brands, or even the same brand in different years and seasons.

Really, it wouldn't be that hard for most dynos to read the same. The parameters (mostly, weight-related and weather-related) can be accurately measured and compensated for. In a world where we can define time and weight to more accurate decimal places than anyone knows what to do with, accurately compensated and comparable dyno numbers across the US is a totally realistic goal, if only the market really wanted that.

No roller dyno is 100% accurate. The only number anyone should be concerned with are the gains. What's to say most dyno's read low. It doesn't matter. It's not like the OP was comparing this to other dyno's and bragging about it. Dyno's are only tools to track your progress and figure out if your mods actually show gains.

Yeah PM's tend to read on the high side, but I really don't understand why people get so pissy about seeing a high number. A 10hp gain is pretty accurate for an UpRev tune.

Why are you agreeing?

Because this is a silly argument.

:iagree:

Exacty. A 10hp gain is a 10hp gain no matter what dyno you're on...that seems to be the average gains from an UpRev tune. Matt, take this to the track and see what your Z can do. If Chuck's car dynoed around the same as yours, you should have a 12 second Z on your hands:tup:

Realistically, the percentage gain is more relevant. And you hope they don't change parameters between runs.

Oh you will see me bragging if I run 12s lol.

I figured it was a bit high but I know they didn't change parameters between runs because I watched the screen through all the runs. They have a solid reputation and that sort of stuff would def show through.

While I'd like a universal standard I'm sure most of us with the standard boltons are within 5-10hp of each other so what is the true difference.

It was a fun experience regardless and the uprev was def worth it.

For what it's worth.... my gain from baseline with an UpRev tune was 25whp. Nice to see, but I was more interested in the torque plot over an RPM range. The whp number really meant nothing to me. Besides, who drives their car at 7500 rpm all the time?

Wouldn't that notion apply to the torque curve numbers also?

Yeah to me that is definitely inflated too...

end of the day it just shows that numbers are not a definitive source of information.

:ugh2:

The only valid argument for that would be differing alititudes and atmospheric conditions... that could technically affect the trap speed I would assume. Still a closer measurement across the board than dyno.