I think they can put in any correction factor they wanted. Want a 1000whp dyno sheet?

 

NA cars loose about 16% power. The turbo cars loose about 7% at this altitude

 

Ill bring the S4. I would be down to try the V10 TDi Touareg as well, but not sure if it can hold gear through the RPM range or not.

 

Based on what data? I have yet to see a data set that supports the theoretical claims. After all the turbo was invented to operate efficiently at high altitude (e.g., in planes).

here is the theoretical...none of the calculations takes into account measurement error.

oh and here is a funny thread from the last dyno run

 

No data, I did the calculations myself. The calc you show is not for turbo mototrs, it is gas law. The turbo is more efficient but not perfect...If you have driven the same car at sea level and here, you know there is a big difference, but not as bad as non-turbo cars.

 

Bill, I remember reading that thread. The dyno corrections factors are crazy. I'd rather have the uncorrected dyno numbers and apply my own correction factor based on what I know. But the truth is that the uncorrected number is the true horsepower that you are making up here and that is what really matters. I would think that most dynos can give you uncorrected numbers instead of their crazy corrections.

 

Looks like we have a black GTR coming now also. Im really interested to see what they actually put down.

 

is it black or is it charcoal gray, nearly black. The one I saw at bandimere looked black, but was charcoal gray. very cool

 

Im pretty sure his dads car is black

 

Another alternative for dyno is MAC Autosport on Parker Rd & C-470.
They have a 4-wheel dynojet and have dynoed high hp cars like twin turbo 1000+whp Viper.

And here's a proof that my friend's old 996TT dynoed there fine (current owner of the car is member "luv4pcar"):

 

Not really an alternative for Saturday. Also, I'm not fan of how they do things there...especially when it comes to how high they put their correction factors.

 

I apply a 1.15 CF on forced induction, and full atmospheric correction (1.25-1.32) for normally aspirated cars, but also can supply uncorrected numbers.

I won't supply any arbitrary CF despite my buddy's post.

I am sure you will be very impressed with our dyno and the beauty of this day is that you can compare the abilities and readings of different dynos (I am sure they would be happy to set up a day too). Our eddy current brakes allow for some pretty interesting abilities with regard to steady state tuning and variable ramp rates.

I have dynoed at MAC and have no problem with the DynoJet or correction factors. I know the family and they are cool people.

 

Cool, if you can do uncorrected Hp, that is all that matters. The correction factors are very high, and definitely not the loss cars experience. But I am sure this is normal for most dynos. I'll be there Saturday

no one has talked about time? when will everyone be there??????????????????????

 

I will open the dyno at 9 a.m. I plan on having a queue set up so that we can proceed on a first come first served or next ready basis.

I would like show you all that realtime tuning systems can use this dyno to target a cell and tune under constant load. It uses very low mass rollers with electrical brakes which can handle high power steady state, allowing for precise targeting of cells. I use this feature to target an RPM, say 3000, then I can tune afrs and timing for cruise (vacuum), light load (0 psi), intermediate (2-7psi), and heavy(7-30). I can target a cell on a map so precisely that interpolation from surrounding cells is negligible or nonexistent.

The other great feature which this allows for is variable ramping. I can allow for a 3 second sweep over the rev range (downhill simulation), or a 20 second torturous sweep (steep uphill), or anything in between. I can even ramp from redline to low RPMs (Tractor Pulls?).

To you, this means that we can check air/fuel or knock correction under light load sweeps before applying normal or heavy loads. We can tell if a car loses power going uphill due to overtuning. Cars which are tuned to the edge on dynos designed for flatlanders can have issues doing steep canyon cruises. I find myself loading much more heavily than my sea level counterparts who use the same machine, mainly because I know my customers like to get to the resorts fast.

Sorry for rambling and see you all soon. 1309 Yarmouth, Boulder CO

 

This sounds great, can't wait to see it.
how many fans you got??