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Old 04-16-2012, 11:45 AM   #52
Scooby Guru
Member#: 261612
Join Date: Oct 2010
Location: Minneapolis, MN
2002 WRX - 750WHP
9.5s @ 150mph


Originally Posted by dux10 View Post
xluben, Please tell me you sent the datalog, car specs, vd plot and dynoplot to Brad? He wants all the data he can get from cars that have actually been on a dynojet to get his math back in order. You'd be doing the community a great service!

BTW: car is awesome all the way around!
Thanks. I have been working with Brad quite a bit. The logs for this tune read around 500WHP on the Virtual Dyno - Dynojet setting. We took a look at them and noticed an issue with how RomRaider collects data with "fast polling" turned on. The data rate is inconsistent and the RPM data actually goes up and down with time.

That is definitely not right, and causes the Virtual Dyno analysis to have some huge spikes. The smoothing takes care of the spikes so the plots look very normal, but it can skew the numbers. One of these days I need to do a log with fast polling turned off and see how it compares.

With the stock turbo and E85 I had the following results:

Virtual Dyno - Dynojet: 338WHP / 381WTQ
Dynojet at MAPerfoamce: 340WHP / 369WTQ
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