Competition Horsepower Graphs

[Wesley]

This isn't something I see very often, I'd like to see everyone's dyno graphs to get an idea for how most people are tuning their engines (peak power, broad power, etc.)

So if you've got a competition dyno graph, throw it up here! For the sake of repeatability and comparison, it'd be nice to just compare from the competition dyno.

As far as what we were shooting for, it had nothing to do with peak power, but smooth and predictable power with a wide curve. It's not as impressive as some of the peak numbers, but we managed to perform pretty well at West.

NA F4i, Intake and Exhaust only.

http://photos-773.ll.facebook.com/photos-ll-snc1/v274/181/98/9619773/n9619773_37284567_9168.jpg

[Wesley]

This isn't something I see very often, I'd like to see everyone's dyno graphs to get an idea for how most people are tuning their engines (peak power, broad power, etc.)

So if you've got a competition dyno graph, throw it up here! For the sake of repeatability and comparison, it'd be nice to just compare from the competition dyno.

As far as what we were shooting for, it had nothing to do with peak power, but smooth and predictable power with a wide curve. It's not as impressive as some of the peak numbers, but we managed to perform pretty well at West.

NA F4i, Intake and Exhaust only.

http://photos-773.ll.facebook.com/photos-ll-snc1/v274/181/98/9619773/n9619773_37284567_9168.jpg

[Derf]

Lots of cool stuff on the Formula Student Germany site including this:

FSG 2007 Dyno Results (http://www.formulastudent.de/public-relations/fsg-news/news-details/article/chassis-dyno-results-fsg-2007-event/)

Of course it doesn't supply specific design information from the teams. Although between talking to the teams, anecdotal info, and pictures you can piece together many details. It does give a great picture of what different top teams are working with capability wise on the powertrain side.

Many thanks to the FSG crew and Bosch for posting the results. I hope our team eventually makes it over to Germany; from all accounts its becoming a premiere competition due to the diligent efforts of all those involved.

[Rickertsen2]

Wow. This is some truly great information

[rjwoods77]

One look at the Wattard engine and you will cry.

[Michael Palaszynski]

http://img172.imageshack.us/img172/6424/fsaewest2008dynotestscack5.th.jpg (http://img172.imageshack.us/my.php?image=fsaewest2008dynotestscack5.jpg)

NA F4i, 4-1 burns collector, 19.5" primaries, 11" runners, 1.5" diameter, 1200cc plenum, 42mm butterfly throttle, venturi type restrictor with 7-degree taper, AEM ECU, tuned by yours truely.

Yea the Wattard is pretty sweet, read his paper, smart guy.

[Mike Hart]

http://www.ubracing.co.uk/images/ubr/ubr11/silverstone/powercurve.jpg

From the Ricardo dyno at UK. Standard 2004 R6 engine with tuned intake and exhaust for max torque.

[Dennis Seichter]

I wouldn't put to much confidence into the results from the dyno at Silverstone. We got some strange looking curve totally different from what we measured on our engine dyno and the dyno at Hockenheim 2007, and our peak power was easily 20 hp beyond what we measured before.

Anyways, I'm looking forward to see the Bosch dyno results at Hockenheim this year!

[Wesley]

I've seen the Wattard! Impressive stuff, the amount of technical challenges he overcame is incredible.

Oh, sorry I didn't put any specs up for what we were running:

F4i, 14º included venturi restrictor, 2.3L plenum, 1.375"IDx10"L intake runners, 1.25"IDx18"L exhaust 4-1, Akrapovic. Stock injector angle and location, 40mm butterfly, Performance Electronics ECU.

[James Kucinskas]

That dyno graph looks a hair better than our Detroit one http://fsae.com/groupee_common/emoticons/icon_smile.gif

[PatClarke]

Quote Mike Hart "From the Ricardo dyno at UK".

Haha, another good Aussie dyno :-)

Pat

[Mike Hart]

It must be a tad optimistic. Herts had 106bhp according to them! Still....Graz had 100PS last year with new cams. I don't believe they had changed anything else.

[Chris_S]

That was 106bhp at the crank. The ricardo dyno must of been using a correction for vehicles with greater transmission losses.

We've had the car on our rolling road after the comp, over 80bhp at the wheels, hopefully with more to come.

[Wesley]

But what does the curve look like?

Peak doesn't matter so much as area under the curve.

[Botin]

http://img73.imageshack.us/img73/9649/hpix2.th.jpg (http://img73.imageshack.us/my.php?image=hpix2.jpg)

From the Ricardo dyno at UK 2008. Stock Honda 600RR engine, supercharge (Rotex C15-60) boost pressure ~0,4Bar, ECU (Fartstup "A small Danish company"), not tune for max power or torque.
It's our second year car "G2"

We did only one pull because of an small water leak, but we got the Ricardo award for this.



Unicorn Race Engineering
Aalborg University
Denmark

[Michael Palaszynski]

How about all the people I saw at west this year on the dyno? Post up your graphs.

[powered by wattard]

This link has all of my info and data (for the WATTARD) for comparison purposes. My PhD has everything in one pdf, titled "Small engine performance limits- turbocharging, combustion or design"

http://dtl.unimelb.edu.au/R/IT...ard&pds_handle=GUEST (http://dtl.unimelb.edu.au/R/ITPAY973C4K6D33N49D3DKR25PXUF2YDJYBD9YP9MSF4CLJDLX-01894?func=search-simple-go&LOCAL_BASE=1543&ADJACENT=N&REQUEST=attard&pds_handle=GUEST)

Hope this helps many powertrain teams out there

Kind Regards

William Attard

[Mikey Antonakakis]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by powered by wattard:
This link has all of my info and data (for the WATTARD) for comparison purposes. My PhD has everything in one pdf, titled "Small engine performance limits- turbocharging, combustion or design"

http://dtl.unimelb.edu.au/R/IT...ard&pds_handle=GUEST (http://dtl.unimelb.edu.au/R/ITPAY973C4K6D33N49D3DKR25PXUF2YDJYBD9YP9MSF4CLJDLX-01894?func=search-simple-go&LOCAL_BASE=1543&ADJACENT=N&REQUEST=attard&pds_handle=GUEST)

Hope this helps many powertrain teams out there

Kind Regards

William Attard </div></BLOCKQUOTE>

Thank you so much, I can't wait to read these.

[JamesWolak]

Just to comment on this. I saw a 15% loss on the dynomite chassis dyno at east last year compared to our dynojet at school. I nearly had a heart attack when i saw this.

From my understanding the interia of the rolls it will effect turbo teams greatly. I have also been told that dynojet adds a 15% buffer into their results but when i asked them they stated otherwise.

I am going back to our SF-901 waterdyno this summer. It will be interesting to find out the differences between our chassis dyno and engine dyno.

[Whis]

Wattard,

You are my hero. My weekend just went away. Right before finals. Okay, your less of a hero now, but the papers are still really really interesting.

Thanks man.