World's first 2010 Prius Dyno

Cool! Nice video. Glad they let you do that. Lot of Bimmer owners I know are hp snobs.

 

To save people from having to convert the link
[ame="http://www.youtube.com/watch?v=e-INfnBJ5fE"]YouTube - Alekshop Dyno Day: PencilGeek - Toyota Prius 114 whp[/ame]

Thanks, I like the reaction!

 

:rockon:

I wonder how many BMW ownwers also own Prius?

We have a 323 CIC as our weekend ride

 

We own a new Prius, but kept our two BMWs (a 3 and a 5 series).

 

Seems the HP drops badly when, presumably, the battery runs low on juice.

 

cool vid ... thanks for posting ... another BMW + Prius owner !

 

Thank you! The video answers a lot of questions. Will there be an opportunity to repeat this test?

What you might do is try a 'forced charge,' hold the brake and floor the accelerator. You should be able to peak charge the traction battery and get an idea about what a maximum acceleration looks like.

Did having the rear wheels locked cause any traction control or other error indication? There may be a way to disable the traction control (I haven't tried it, yet.) This might give a little better acceleration.

Yes, I think the three runs are showing the effects of traction battery depletion. It would be great if we could get something like Auto Enginuity or TechStream Lite to record metrics from the car during the runs.

Can you provide some more metrics about the test car:

• gasoline - octane, ethanol content, brand. I found 89 octane had a measurable effect in hill climb data. So I would expect straight gas, 89 or higher octane, would have a significant effect.
• tire - pressure and brand, max sidewall should help by reduced rolling resistance
• has transaxle oil been changed - my change at 5,000 miles revealed an initial load from left over manufacturing material, early gear wear and loose fragments of sealant along with a 5% loss in viscosity. I'm waiting on 15k, service miles before my second change.
• last alignment numbers - all of our stock Prius have shown more camber than I care for and the toe was off on the 2010.

Thanks,
Bob Wilson

 

Well... not a BMW but a Hyundai Genesis Coupe 3.8 GT V6 AT is our weekend ride. The Prius V is the weekday drive to work.

 

The striking difference is the angle of the graph. BMW curves are like 45 degree reaching it's peak around 80-100 MPH. Prius' power delivery climb to near peak by 40 MPH.

 

It has me wondering too. Traction control?

I have an Auto Enginuity and GPS and can do a recorded, maximum acceleration. With the weight of the vehicle and driver, we can calculate the power and other forces. . . . Hummm, sounds like a good excuse.

Bob Wilson

 

Excellent, I see you are running 89 octane. But I noticed in the video, one red car in the middle with the "Texas Mile: 186.1 mph" . . . what was that about?

"2008 M3 6MT" - ?

I see the problem with not having the ignition wire to read out the ICE rpm. But I noticed the gas engine cars were running a rich mixture at low RPM but leaned out at higher power settings. How are they measuring it?

Without a dyno, I can run well instrumented flat and hill climb, 8.3% grade, data. But you mentioned using 77F for the standard day temperature instead of 60F, this is new? I can use the vehicle indicated temperature at the run site(s) but will have to use local weather stations for barometric pressure. GPS will record the altitude and my GPS mouse reports ephemris every second.

My wife's car is running Shell, E10, 87 octane for fuel efficiency. But we have at least two sources of straight gas and +89 octane. Her car has about 150 miles remaining to empty so I'll switch hers to their max octane and retest.

We're already on Sumitomo T4s due to a second puncture over the same spot. The transaxle oil was changed at 5,000 miles so we're in good shape for testing.

Thanks,
Bob Wilson

 

Thanks for providing the link to the graphs. Were the BMWs dyno-ed in a single gear? The graph only shows one continuous line per run.

 

Awesome! Thanks for doing that and posting the results/video. Looked like a fun day.

Oh, and nice M3