DFW Auto Club Dyno Day 12/13 (56k death)

[Blake]

many many thanks to my friend adam who arranged all of this...it was his birthday party. i think it's safe to say we had a blast today. i have tons of videos to chop so i probably won't be posting any until late tonight or tomorrow. below are the pics!

details on location: the new autoscope location in dallas "the dream garage". words can't describe how impeccable these new facilities are. everything is modern and clean...and the dynos.... they are twin AWD mustang dynos complete with a drag race setup...tree and all. as you'll see when i post the video, my M3 did a 12.13@113mph in the quarter mile. definitely surprised a few people.

cars in attendance: ferrari 612 scaglietti (an absolutely gorgeous car), ford GT, 2 nissan GT-R's, multiple M5's, M6's, and E92 M3's all modded, 997 porsche turbo, E92 335, Z4M, Z3M, audi S5, merc C63 AMG, chevy C5 Z06 modified, a couple SRT8 jeep cherokees , and a V8 swap mazda RX7. (i hope i got them all)

VIDEOS FROM EVENT:

[Blake]

moar pix

[Blake]

GT-R dyno results

[Blake]

2008 M3 DCT dyno and 1/4 mile results

Max Power: 328.8
with WCF: 332.2

Max Torque: 252.1
with WCF: 254.6

[Krueger///M3]

Thanks for the pics. How did you get a 12.1?

[Blake]

Originally Posted by Krueger///M3

Thanks for the pics. How did you get a 12.1?

S6 no LC. a note about those mustang dynos...according to some quick research, those 1/4 mile times are accurate to within a tenth of a second. i'll post a video of the run as soon as i get a chance...you'll hear wheel spin and everything due to the feedback the mustang dyno provides, although there probably is some play in there.

[Blake]

http://www.smokinvette.com/corvettef...99&postcount=2 - he seems to know his shit fairly well, since i'm sure the dyno conversation will come up.

The answers you'll get to this question will depend on what the answer giver uses. I use a mustang dyno so I will explain how that works. The Mustang dyno comes standard with the eddy current controller. This allows the operator to load the rollers for any driving situation and accurately simulate loads based on weight or grade (pulling a trailer up a hill). By entering the weight of a vehicle when tuning you place a load on the motor which is a true representation of what it sees on the street or at the track. Thus tuning is specific for your application. Some other dynos that are inertia only (just spinning the rollers) only load the car as if you engine were in something like a miata. So tuning becomes more of a guessing game as to how the car will react on the street or track.
What's more is the Mustang Dyno uses a closed loop, torque based feedback system. There is a load cell on the dyno which reads the instantaneous torque being applied to the rollers from the car. For one, this is where our hp calculation comes from. HP = (torque x rpm)/5252 and since we know the exact torque being applied to the rollers the math is easy. The torque feedback also allows for accurate real world testing such as 0-60mph and 1/4 mile times. We know the power, weight, and speed of the car. My dyno and proven accuracy of the 1/4 times to be inside a tenth of a second. The machine also allows steady state testing. The steady state can be in terms of rpm or mph. Say I chose 3000 rpm or 40 mph. I can set the machine to hold it at my chosen rpm or mph and regardless of what I do with the throttle the car will not deviate from that parameter. The machine will simply load or unload the rollers to keep it where I want. This is important for tuning and for diagnosing problems that only occur under specific driving conditions. The load cell will also point out small power dips in the tune or drivetrain issues such as clutch/tranny slippage. Inertia only companies also market the idea of their machines being superior in terms of "repeatability." They base this on the fact that you're just spinning rollers and there's no eddy current controller involved. The fact is that I can graph the torque read by the dyno, the voltage sent back to the eddy current, and the load applied by the eddy current. If I wanted to prove repeatability from run to run I could graph it right there in quantifiable figures. So while others say their machine is "repeatable" I'll show you the proof.
There are other companies that offer eddy current controllers on their dynos but don't offer any feedback to the computer so they limit their capabilities. Basically eddy current controllers with no feedback just allow for loading the rollers in terms of percent (1, 2, 3, etc.) and cannot perform many of the functions I just mentioned.
IMO the mustang numbers are the "accurate" numbers. In fact the guy who created the dynojet is on record as saying there's a fudge factor built into the dynojets which inflates numbers because when they designed the first unit it didn't put out the numbers they expected.
That's the quick rundown from my point of view. I'll let others go into the details of other machines.

[BMW_TT]

Where are the run videos Blake?

[Blake]

Originally Posted by BMW_TT

Where are the run videos Blake?

i'm working on them right now. give me an hour, i'll have a few up.

[TLud]

That's an amazing group of cars in one place. I wish I could have been there to see them in person.

That shop has a killer setup. How much does he charge for a dyno session?

Your trap speed seems a little low for the 12.1 time your car ran. Any idea why?

[Blake]

Originally Posted by TLud

That's an amazing group of cars in one place. I wish I could have been there to see them in person.

That shop has a killer setup. How much does he charge for a dyno session?

Your trap speed seems a little low for the 12.1 time your car ran. Any idea why?

the setup is absolutely unreal. i wish they did warranty work, because i'd take my car there. i should have taken pictures of their lobby, conference room, and other related areas because they're all brand new, luxurious, and state of the art. as far as costs, i'm sure we can work a deal with them...but less than $100 for a few pulls. if you're interested in getting some numbers when you're in town later this month, let me know, i'll set you up with them. about my trap speed, i have no idea. i'm not a drag expert at all.

[Blake]

oh, forgot to post the S5's time...

[Blake]

my 2008 e92 dct doing a quarter mile run

click here for high quality

[Blake]

2008 nissan gt-r on the dyno

click here for high quality

[Blake]

2007 modded m5 on the dyno

click here for high quality

[Blake]

2005 chevy corvette c5 modded on the dyno (my camera fucked up and didn't record the last few seconds, i'm pretty sure it was because of the deafening exhaust.)

click here for high quality

[Blake]

2007 jeep GC srt8 on the dyno

click here for high quality

[Rick]

Awesome!!

Now MOAR pix of girl in purple!

[Blake]

walk thru video of all the cars and the new autoscope location

click here for high quality

[peter@wheelexperts]

awesome event, thanks for having us! I left before the S5 showed up, whose car is that?

[Blake]

Originally Posted by peter@*******perts

awesome event, thanks for having us! I left before the S5 showed up, whose car is that?

i think he's a neighbor of my buddy adam. not sure though...

[davedave]

GTR is very quiet