Is There a New Dyno Standard?

[Speeds8erM-1]

Actually, since you put in the weather factors manually on a Mustang dyno and do alot of tricks with the loading, it's easy for a shop to tune a car and make it look like they picked up alot of power.

It's not near as easy on a Dynojet. Thats why they are the industry standard.

 

[Tomato]

Industry Standard?

hahahahahaha lol.

Dynojets are for dynoqueens. Only good for getting big numbers.... uselss for tuning. I can map brand new EFI system on a MustangDyne in 2-3 hours.... dynojet?? might as well do it on the road.

Took dynojet what? 10 years to add an OPTIONAL absorber? And out of the thousands of dynojets out there, what? 1% has a brake (and dont even get me going on the truck DRUM BRAKES they tried using lol... that was an embarrassment.)

You can fudge ANY dyno very easily. It really is not an issue with reputable tuners/shops...

 

[Speeds8erM-1]

All I know is my local dyno has a NEW one with loading. He never had a problem tuning cars on the old dynojet that another place uses. Yes you can fudge any dyno easily, Mustang dynos are easier though. I wont bring up shop names but they are decently well known, have a Mustang dyno and their cars always come out making big numbers but run like they have 50 less hp.

 

[Tomato]

All I know is my local dyno has a NEW one with loading. He never had a problem tuning cars on the old dynojet that another place uses. Yes you can fudge any dyno easily, Mustang dynos are easier though. I wont bring up shop names but they are decently well known, have a Mustang dyno and their cars always come out making big numbers but run like they have 50 less hp.

You have that backwards.... common experience and response is that Mustang Dynos read 12-14 % lower then Dynoqueens...

 

[Grn92LX]

yet another reason I street tune my car with a tuning device and a wideband kit with datalogging capablity. I don't care what it dyno's. I care about a perfect tune (which you'll get on the street since its s REAL true load the car will always be under)

 

[Tomato]

yet another reason I street tune my car with a tuning device and a wideband kit with datalogging capablity. I don't care what it dyno's. I care about a perfect tune (which you'll get on the street since its s REAL true load the car will always be under)

So is a Mustang Dyno... (real laod that is)
I tuned on Dynojets for 3 years, and have now had my MD250 for 3 years.... I also "street tuned" for years...

Answer me this... how with a "street tune" are you gonna get a perfect tune? How do you know if you are giving up 10 lb ft? You can't feel that... Or lets say more timing from 5200 to 5600 gives you 6 rwhp.... you are telling me you are gonna feel that, or run consistanlty enough at the track to see it??

There is NO pefect tune..... but a good load dyno is way closer.

 

[Tomato]

yet another reason I street tune my car with a tuning device and a wideband kit with datalogging capablity. I don't care what it dyno's. I care about a perfect tune (which you'll get on the street since its s REAL true load the car will always be under)

Or wait!!! Cause you wanna use a cheap consumer level wideband that is nowhere near accurate??

 

[Grn92LX]

Typical response from an over priced dyno owner

I was gonna give you the decency of a normal response until I read your little "flame". You don't even come close to deserving that decency.

You don't even know what I have LOLOLOLOLOLOLOL

 

[Speeds8erM-1]

Yea, I generally trust a DECENT aftermarket in car wideband over a dyno one but have seen them both be dead on.

Im well aware that Mustang Dynos read lower, I never said that they didnt. They read lower, so that makes them better? Right.

 

[89MustangGX]

Yeah, no kidding. You HAVE to correct, otherwise, you don't know if the 2 degrees more timing made the extra 4 rwhp, or because the baro was higher....

You're going to tell me that I can pick any two days of the year and if you pick up 4hp you will know it has absolutely nothing to do with anything other than the output of the engine? You thing the correction factors are THAT good?

That's a tough pill to swallow.

 

[grrrrrrr]

Technically speaking it's all mathematics. SAE is the standard correction factor. STD is whatever the mathematical formula inherent in the dyno spits out. So if you dyno a car in the stratosphere (really high up in the atomosphere) the STD numbers are doing to read about 10HP, and if the programmers did their job right, the SAE numbers are going to read spot on. There really is no way around the math, a dyno is either correct, and will be within a certain tolerance set by the manufacturer(I'm guesing 1 or 2%), or someone has monkeyed with the program and changed the math (not neccasarily the people who own the dyno). 'Dynoqueens' read higher because they don't factor in weight, or so I hear. Friction from the tire to the pavement would detract from your total power applied to the ground, and hence acceleration. I'm not sure how they calculate it and I don't entirely trust it. But horsepower is just simple math, it's all a matter of 'where' you measure it. Kinda like dynoing a motor without the accessories, then without the transmission and car, then without the wheels, then finally on a chassis dyno... it's all relative. Thats why the SAE correction came out to begin with. So jo schmo (thats you) can dyno his car anywhere on the same 'style' dyno, and if it's not been monkeyed with, will come up with reliable, repeatable, and verifiable results. You guys are forgetting that a dyno is just a tool, it doesn't matter what number it spits out, as long as you can repeat that number, and through positive modifications can increase it. If you're going to get dyno'ed, and want to see if the parts you bought worked, then you have to take your car back to same dyno because even though the math should be standard across the board, the reality is that small variations in weight and other factors local to one particular dyno will produce slightly different readings from place to place.

 

[grrrrrrr]

Also the sensors that tell a dyno what type of air it's dealing with could be out of cal, or just plain broken, so that becomes a factor as well. I believe they measure barometric pressure, temperature, and humidity, maybe some other things as well.

 

[Tomato]

Typical response from an over priced dyno owner

I was gonna give you the decency of a normal response until I read your little "flame". You don't even come close to deserving that decency.

You don't even know what I have LOLOLOLOLOLOLOL

Newbies....

I have a $5000 wager for ya.

I bet whatever tune you come up with street tuning for 2 weeks, I can improve in on the dyno in 1 hour.

Here.... tell me..... how do you think street tuning would work on this 1200 hp Mustang?? (It's run 8.1 at 177mph).... tuned in less then 4 hours on a Mustang MD250...

http://www.performance-shop.com/videos/derek1.mpg

Fawkin kids.....

And as far as knowing "what you have"....lol. I know that from your posts... a know it all attitutde without knowing fawk all

 

[Tomato]

You're going to tell me that I can pick any two days of the year and if you pick up 4hp you will know it has absolutely nothing to do with anything other than the output of the engine? You thing the correction factors are THAT good?

That's a tough pill to swallow.

I can tune a Honda Civic today, and with SAE correction, the guy can come back a year or so later, and get within 1 hp of his old numbers.... been there, done that. Same day, run to run, my MD250 with some care will repeat to under 1 hp....

Only works really with NA cars, boosted cars are off as the SAE factors overcorrect these, but its far closer with correction then without....

Or as another example... my current Capri make 229.x rwhp 2 weeks ago.... then prior to the intake swap, i tried it again, and it make 229.x rwhp.... so when the intake swap was complete the next day, I could say that the power went up 11.5 rwhp, and it was due to intake, not weather.

 

[Billy88LX]

Hey Toma, I see your having alittle fun over here.

 

[89MustangGX]

I can tune a Honda Civic today, and with SAE correction, the guy can come back a year or so later, and get within 1 hp of his old numbers.... been there, done that. Same day, run to run, my MD250 with some care will repeat to under 1 hp....

Only works really with NA cars, boosted cars are off as the SAE factors overcorrect these, but its far closer with correction then without....

Or as another example... my current Capri make 229.x rwhp 2 weeks ago.... then prior to the intake swap, i tried it again, and it make 229.x rwhp.... so when the intake swap was complete the next day, I could say that the power went up 11.5 rwhp, and it was due to intake, not weather.

If this is really the case, than I am impressed and I will stand corrected. I just have never seen repeated numbers back-to-back ever, let alone on different days, etc.