Yes.

 

Ryan that looks suspiciously like our forthcoming ECU line up!
We will be offering stage packages like we do for the WRX as well as individual products. We are very excited about the potential lurking in the EVO VIII.

Brett.

 

One word...Awesome.

Ryan
(Anxiously awaiting what the ingenious minds at Vishnu Performance have in store.)

 

Post the dyno graph next time!

I will never dyno any AWD car on a DynoJet Dyno Chassis (Independent Rollers, bad for center diff.)!

 

Ok so the hp to the wheels should be 206 if the car is 271 to the crank at 24% drivetrain loss??

Does the fact that the EVO dynoed 230 to the wheels mean the car is underated?

I am still trying to sort out the information here???

 

Yes, provided the dyno's accurate, at 24% loss, the 230 WHP equates to a little more than 300 CHP.

 

No, like has been posted several times, there are about 4 different AWD dyno systems and they all give different HP readings. The Dynojet that the test was done on gives far higher numbers than the Dyno Dynamics #'s you are comparing to. Just read the rest of this thread, all this has been answered already.

 

Ben, you're not listening to me. I'm just verifying the math.

Jeez.

That IS what it works out to, given WHP from dyno as "X" and % loss as "Y" and CHP as "Z," thus...

Z-Y=X

thus

300 - 24% = 228

the MATH is correct, whether the dyno is correct is another story entirely.

 

Thanks for the clarification!

 

The math isn't correct though. 230 on a Dynojet would equate to about 196 on a Dyno Dynamics. Using your math with that # would give about 260hp. That's why I've been saying for 1 different dyno's give different #'s and for 2 the % loss isn't valid math in the first place.

The best way to look at it would be to compare what another car did on the same dyno. In this case a WRX did 190 on that dyno which would mean the EVO is right around it's claimed 271 hp.

190/227=230/X
X=274

That's as accurate of math as you can get for crank hp with a dyno, still not exact.

 

Dyno Dynamics are generally 12% lower reading than Dynojets. Dynojets do read the highest.

 

Just to show the difference..if you use the 12% loss factor for Dyno Dynamics the Evo VIII would be around 202.4. So your looking at about a 10hp loss from the Euro-specc that was done on Dyno Dynamics. FYI, My opinion on Dyno Dynamics is that they read a little inaccurately low.

 

I don't know where that 24% is coming from, but so far we where always using 18% for the AWD, 15% for the RWD (with front mounted engines) and 14% for the FWD cars. It doesn't make sense to expect that AWD cars are loosing so much more than the other ones, especially since drag strip times are not supporting that big loss either.


Fedja

 

24% loss is what was posted for several JDM Evo VII dyno tests.

 

Just to add my observations on the matter I have seen on the same car, within 1 hour on 2 different dyno's( our dyno dynamics dyno) and a dynojet the following results. Modified WRX on our dyno made 224 wheel horsepower. On the dynojet it made 276 wheel horsepower. Which one of these results would you tell your friends you made? Which result as a tuner would you rather tell your customer? Which result would help you sell your product(dyno)? We care about accurate, repeatable numbers, but more importantly the ability to tune a car using our dyno. The only results that you truthfully can compare are the same dyno with the same testing procedure using the same correction factors. A stock C32 AMG made 296 wheel horsepower on our dyno. A stock R33 Skyline GTR made 235 wheel horsepower. A stock C5 Corvette made 280 Wheel horsepower. A stock Audi S4 made 172 wheel horsepower. A stock 996 twin turbo made 336 wheel horsepower. A stock 993 twin turbo made 307 wheel horsepower. All of these numbers seem pretty accurate to me?? Our prototype stage 3 WRX made 370 wheel horsepower on this same dyno. The EVO VII we tested made 212-217 wheel horsepower on 91 Octane gas. However on 93 Octane it went to 230 wheel horsepower, and truthfully if we added a little more octane to the tank it may have gone slightly higher. That's because it is using an unaltered European ecu made to run 94+ Octane.
Saturn motorsports has just ordered a few of the dyno dynamics dynos, as has K&N and an increasing amount of tuners. Soon this dyno will be more common and people will understand the numbers it makes a little better. It is the standard dyno of choice in Australia and has been for some time.

There is some good reading at this link for people interested in the way this dyno works.

http://www.aussieimportsllc.com/4wdcont.htm

The fact that the EVO VIII made 230 wheelhorsepower on a dynojet leads me to believe the car is making the advertised 271 wheel horsepower.

Brett.