Dyno'd this morning in some pretty good conditions. About 50F, dry.

Performance mods:
-Helix uppipe
-Cobb Catback
-Perrin Intercooler hoses
-Perrin inlet pipe
-Cobb Accessport Stage 1

http://www.hsubaru.com/uploads/george_dyno1.jpg

I'm happy :)

Very nice curves... pretty sexy ;)

~v6

Nice looking curves for sure.

Quick question....any of you guys know how the hp@50 mph figure in the Mustang dyno affects the reported results? (I dynoed my C320 wagon on a Mustang and they used 16 hp @ 50 mph and a vehicle weight of 3600 lb).

i believe that's the figures they come up with to calibrate the dyno for the WRX.
i believe the wt goes up for the STi.

is this with/ without a cat?
whats the boost set at on AP1?

I've got the 2 stock rear cats. Boost for stage 1 is ~14.7psi give or take a few tenths.

I'd say those are great #'s. Especially for a stg1

Yeah, the dyno operator looked pretty surprised when he saw it :D

Next step is downpipe and stage 2 ;)

especially nice for an 02.

Steve is an awesome guy. I was checkin out the place when he ran a Cobb stage 2 plus uppipe today. same weather, put down 253 whp, 233 wtq. NO joke. Steve was very surprised. FI-S is a great place

I honestly have to say I can't believe these numbers that are being put out. And a mustang dyno is one of the lower reading dyno's correct?

mustang is on par with dynojet... it varies dyno to dyno. the dynapak is the lower reading of the three. nice numbers... great torque plateau.

Steve is an awesome guy. I was checkin out the place when he ran a Cobb stage 2 plus uppipe today. same weather, put down 253 whp, 233 wtq. NO joke. Steve was very surprised. FI-S is a great place

I honestly have to say I can't believe these numbers that are being put out. And a mustang dyno is one of the lower reading dyno's correct?

Was that car a black 04? I passed one when I was leaving the place today.

nah, blue one. it was later in the afternoon

Very nice! Those look like stg. 2 numbers to me. Did you shut down at 6500 rpm? I would like to see the rest of the curve.

I wasn't the one stepping on the gas ;) Steve at FIS does all the stuff with the dyno.

But considering the peak hp is at 6250, it can be assumed that the torque was going down at a rate faster than the formula would allow for horsepower to get any higher, so that's as high as that number will get for now.

mustang is on par with dynojet... it varies dyno to dyno. the dynapak is the lower reading of the three. nice numbers... great torque plateau.
r u kidding?

But considering the peak hp is at 6250, it can be assumed that the torque was going down at a rate faster than the formula would allow for horsepower to get any higher, so that's as high as that number will get for now.

So what do you think the shift points will be if you want to race it?

I shift at redline, for the sake of falling back into the power.

Are you sure you dont have a DP? :lol: I guess that dyno just reads high then....higher than other dynojets... :confused:

It might read high, but if I compare it with other cars that dyno on that, than I have a good basis for comparison. Stock STis pull 240-250 on that dyno. Stage 2 WRXs consistently pull 240-250 on it, so maybe I just have a freak for a car :)

Nice looking curves for sure.

Quick question....any of you guys know how the hp@50 mph figure in the Mustang dyno affects the reported results? (I dynoed my C320 wagon on a Mustang and they used 16 hp @ 50 mph and a vehicle weight of 3600 lb).

The weight and the HP@50MPH are the two values that allow us to run Vehicle Simulation on our dyno. Vehicle Simulation is a Patented program that we have that allows us to simulate any vehicle going down the road. This simulation includes the weight of the vehicle, wind friction and road friction - it's basically the closest thing to a rolling road on the market. Other Dyno manufacturers out there say they have an Eddy Current Loading dyno (and they do), but you need to make sure you are comparing apples to apples when it comes down to what our E.C. Dyno can do versus their's. The two numbers represent: 1. duh, the weight of the vehicle and 2. the amount of HP it takes to hold that car at a constant speed of 50MPH on a straight road. We get these numbers from the government. For most cars, the HP@50 # is usually 10-16HP and for most trucks, the # is 18-23HP.

Technically, the HP@50 and the weight will not directly affect the results of the test, but indirectly, they will. Now on the dyno is a Load Cell which measures the amount of Torque that is being made by the vehicle at any given time. So this Load Cell is totally independent of the load that is being placed on the car. This is the reason the load does not directly affect the results of the test.

Indirectly though, the amount of load that is placed on a vehicle will determine which load column of your fuel map you will be in and every column is tuned differently. For example: say the 60% load column is tuned great and the 80% load column is tuned horribly. Let's also say that when the car is on the street, you are normally in the 60% load column - so everything looks and feels good. Now you throw it on the dyno and load it up correctly, which puts you in the 60% load column and you run a test and it makes good power. Now the dyno operator takes the weight and bumps it up a few hundred pounds, which puts you in the 80% load column. Then you run a pull again and the car makes a really bad HP number. But it wasn't the dyno's fault that you made a bad HP number, it's the fact that the load column you were in during the test is tuned bad. So indirectly, the HP made during a pull can be skewed by the weight and HP@50 number.

clear as mud? :p

Tim
Sales Engineer
Mustang Dynamometer

Simply put, the HP@50 and the weight of the vehicle numbers will control how fast the dyno sweeps through the test.

The numbers on the plot are only the result of the load put on the load cell by the car.

Totally independent.

You can also run the test by telling the system to go from xx rpm to yy rpm in zz seconds (this is how I usually see Dynapacks run) which does not take into account the real affect of things the car would see in real life (tire resistance, wind resistance, etc...as mentioned above). Hence the term Vehicle Simulation.

mustang is on par with dynojet... it varies dyno to dyno. the dynapak is the lower reading of the three. nice numbers... great torque plateau.

That's not true, it's on par with dyno dynamics. Dynapak reads higher. For example a stock STI on MZM Mustang Dyno puts down 195-200. Dynapak reads 250-260. On the mustang dyno I went on (Gruppe-s) it puts down 220s. What are you basing your information on.