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928 Dyno Day in Green Bay Results (aka Sharks in Titletown)

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928 Dyno Day in Green Bay Results (aka Sharks in Titletown)

 
Old 10-06-2010, 07:46 PM
  #31  
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Crap I would have come up if I didn't have a bike race that weekend. Only 4 hour drive from my house.
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Old 10-06-2010, 08:40 PM
  #32  
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Originally Posted by Hacker-Pschorr View Post
What do you think Ariel is holding??

Slow boiled in a mixture of Oktoberfest and Pumking beer with butter and onions then grilled to perfection.
Two dozen brats lasted about 5 minutes


Southern or Wisconsin hillbillies? There is a (scary) difference.......
Do you folks even HAVE hills in Wisconsin?


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Old 10-06-2010, 09:33 PM
  #33  
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Originally Posted by Andrew Olson View Post
The taller the gear the longer it takes to spin it up. Weight of the drum also comes into play. The more mass... the longer it takes.

We wanted a longer run so we could get enough time at each point in the power band to look for knock and such.
Um, you do realize this is an eddy brake equipped dyno, next time just ask Luke to turn on the juice..... like I usually do
Tune for any gear, any load.

http://www.dynojet.com/automotive_dy...o/default.aspx

Originally Posted by blown 87 View Post
Do you folks even HAVE hills in Wisconsin?
Our hills are holy

http://www.sacred-destinations.com/u...-hill-basilica (shot my avatar from the top of the tower).
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Old 10-06-2010, 09:46 PM
  #34  
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Originally Posted by Hacker-Pschorr View Post
Um, you do realize this is an eddy brake equipped dyno, next time just ask Luke to turn on the juice..... like I usually do
Tune for any gear, any load.

http://www.dynojet.com/automotive_dy...o/default.aspx

What's the capacity of the eddy current unit, how much power can you tune with it at constant load? I think many of these inertia + eddy current dynos are pretty good, but can't literally hold huge power at constant load. Instead, they can just slow down the pull, which in itself is very helpful for tuning.

The reason why I am interested is that I've been converging to a water brake pure load dyno (Dynapack) for tuning, but wanted to know if there's a reason to reconsider.
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Old 10-06-2010, 10:29 PM
  #35  
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Originally Posted by ptuomov View Post
What's the capacity of the eddy current unit, how much power can you tune with it at constant load? I think many of these inertia + eddy current dynos are pretty good, but can't literally hold huge power at constant load. Instead, they can just slow down the pull, which in itself is very helpful for tuning.
As I understand it the big issue is heat, as long as you keep them cool, shouldn't be a problem.
I suppose power could also be an issue if the dyno doesn't have a good supply.
Both of these issues have more to do with how the shop installed and maintains their equipment versus the dyno's themselves.

When I first visited the local SuperFlow, the owner demonstrated a 1,000+rwhp/1,000rwtq drag car brought down to a crawl as he turned up the brakes. He could hold any load in-between.

The DynoJet down the road has two "in house" cars in the 700-1,000 rwhp/rwtq range I've seen them tune with the eddy brakes without problems. One of them is AWD!!!

Originally Posted by ptuomov View Post
The reason why I am interested is that I've been converging to a water brake pure load dyno (Dynapack) for tuning, but wanted to know if there's a reason to reconsider.
IMO the operator / tuner of the dyno is far more important. All of the major dyno brands are good (I've used most of them).
I'm lucky the two closest happen to have very experienced tuners at the helm.

Try them all, that's part of the fun of these projects: Visiting all kinds of speed shops
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Old 10-06-2010, 10:46 PM
  #36  
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Originally Posted by blown 87 View Post
Do you folks even HAVE hills in Wisconsin?


Wisconsin has hills like Georgia has mountains

Ok, I retract my suspicion of this being a staged event. Love the brat recipe. Gotta try that. Not a lot of brat eaters here in Arizona during the summer.
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Old 10-06-2010, 11:06 PM
  #37  
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Originally Posted by S4ordie View Post
Wisconsin has hills like Georgia has mountains

Ok, I retract my suspicion of this being a staged event. Love the brat recipe. Gotta try that. Not a lot of brat eaters here in Arizona during the summer.
So they have hills?
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Old 10-06-2010, 11:39 PM
  #38  
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Another fun time in Green Bay! Even though this time it was kind of a last minute situation, there was still a pretty good turn out for game day, and the whole weekend was fun. With winter on it's way, it was nice to get to some of the things that had been getting put off for various reasons.

When making comparisons between cars, it often gets more complicated because of the number of differences between them other than just something like twin screw vs centrifugal. Andrew's car is a GT, and Tim's is an S4, so Andrew's engine has bigger cams and a slightly higher compression ratio. Andrew's has a manual transmission with five gears, and Tim's has an automatic with four. Andrew's car has lower drivtrain losses, and Tim's shifts faster. Andrew has a 2.73 final drive ratio, and Tim's is 2.54. Andrew's is red, and Tim's is black, which everyone knows is inherently the faster color.

Even with all of the differences, it's interesting to take a look at some of the data. As these guys can tell you, I like actual, measured data, and love looking at some of the stuff like the G-Tech runs. That's even more true since these particular runs were done at the same location, and at the same time. That eliminates environmental variables that can have a significant difference, like different roads, different weather, different altitudes, etc.

In taking a close look at the distance vs time data of the G-Tech runs, from a dead stop, both cars start out exactly even. Maybe because they're both limited by very close to the same available traction? After about 0.6 seconds, the cars have gone 7 feet, and Tim's car barely inches ahead, by less than a foot, until Andrew catches up at the 1.4 second mark, when both cars have gone about 28 feet. At 1.5 seconds and 30 feet, Andrew starts to pull ahead. Andrew hits the 60' mark in 2.113 seconds, a little over a foot ahead of Tim, still slowly pulling away, getting to a maximum of 3 feet ahead at about the 2.8 second mark, where he's traveled 102 feet and Tim's traveled 99 feet. Tim then start to gain, and catches him at about the 3.35 second mark, where both cars have gone a little over 140 feet. After that, Tim's car steadily moves ahead. Tim's car hits 60mph in 3.888 seconds, at which point it's gone a total of just over 184 feet, and is a little under 4 feet ahead of Andrew's car. After 7.865 seconds, Tim's car hits the 1/8 mile mark doing 98.51mph, and is ahead of Andrew's by a little over 45 feet. Tim's car crosses the 1/4 mile point in 11.857 seconds, going 125.59mph, and 100 feet ahead of Andrew's car.

Oh yeah, if anybody asks, this crack that mysteriously appeared a little north of Green Bay, and right after the get together, is just a coincidence.
http://www.youtube.com/watch?v=q4S5IOHVyvE
You guys might want to think about doing your G-Tech runs in opposite directions next time, to kind of cancel each other out.
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Old 10-07-2010, 01:29 AM
  #39  
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Originally Posted by Tim Murphy View Post
While watching the videos I noticed the difference in AO's times as well and just figured the first run was 4th and the second run was 5th gear. Didn't notice when at the dyno.

The total difference in times (comparing the longer run for AO with mine) would be the difference in final drive ratios. I have a 2.54 diff and AO has a 2.73 so my car would have to spin the drum to a little higher wheel speed in top gear to get to redline, which explains the longer run for my car.

Make sense?

Did Olson have ClubSport rims and Helium in the tires again?
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Old 10-07-2010, 01:40 AM
  #40  
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Ah, too bad! I was in Green Bay for work this past weekend...I wondered what was going on when I tried to book a hotel and midrange rooms were going for $120+ each or all booked out.

I had to drive down to Sheboygan to find a room

Looks like a good time was had by all. At least no accidents and nobody blew up; I've seen that before and it's not a good time.

R
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Old 10-07-2010, 06:03 AM
  #41  
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Guys


Does The wifes car still run a V2 and a 3.33 pulley with a 4" inlet or a twin inlet
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Old 10-07-2010, 06:35 AM
  #42  
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Sound Good!!!!!!1
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Old 10-07-2010, 09:19 AM
  #43  
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Originally Posted by stuartph View Post
Guys


Does The wifes car still run a V2 and a 3.33 pulley with a 4" inlet or a twin inlet
Yes, twin 3" into 4" at the air box. I picked up almost 2lbs boost by going with the dual setup. Besides that, it just fits better.

BTW Stuart, I will update your chips to the latest version. Send me an email.
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Old 10-07-2010, 09:24 AM
  #44  
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Thanks Tim


Something like this
Attached Images  
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Old 10-07-2010, 09:27 AM
  #45  
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Originally Posted by Z View Post
Another fun time in Green Bay! Even though this time it was kind of a last minute situation, there was still a pretty good turn out for game day, and the whole weekend was fun. With winter on it's way, it was nice to get to some of the things that had been getting put off for various reasons.

When making comparisons between cars, it often gets more complicated because of the number of differences between them other than just something like twin screw vs centrifugal. Andrew's car is a GT, and Tim's is an S4, so Andrew's engine has bigger cams and a slightly higher compression ratio. Andrew's has a manual transmission with five gears, and Tim's has an automatic with four. Andrew's car has lower drivtrain losses, and Tim's shifts faster. Andrew has a 2.73 final drive ratio, and Tim's is 2.54. Andrew's is red, and Tim's is black, which everyone knows, RED is inherently the faster color.

Even with all of the differences, it's interesting to take a look at some of the data. As these guys can tell you, I like actual, measured data, and love looking at some of the stuff like the G-Tech runs. That's even more true since these particular runs were done at the same location, and at the same time. That eliminates environmental variables that can have a significant difference, like different roads, different weather, different altitudes, etc.

In taking a close look at the distance vs time data of the G-Tech runs, from a dead stop, both cars start out exactly even. Maybe because they're both limited by very close to the same available traction? After about 0.6 seconds, the cars have gone 7 feet, and Tim's car barely inches ahead, by less than a foot, until Andrew catches up at the 1.4 second mark, when both cars have gone about 28 feet. At 1.5 seconds and 30 feet, Andrew starts to pull ahead. Andrew hits the 60' mark in 2.113 seconds, a little over a foot ahead of Tim, still slowly pulling away, getting to a maximum of 3 feet ahead at about the 2.8 second mark, where he's traveled 102 feet and Tim's traveled 99 feet. Tim then start to gain, and catches him at about the 3.35 second mark, where both cars have gone a little over 140 feet. After that, Tim's car steadily moves ahead. Tim's car hits 60mph in 3.888 seconds, at which point it's gone a total of just over 184 feet, and is a little under 4 feet ahead of Andrew's car. After 7.865 seconds, Tim's car hits the 1/8 mile mark doing 98.51mph, and is ahead of Andrew's by a little over 45 feet. Tim's car crosses the 1/4 mile point in 11.857 seconds, going 125.59mph, and 100 feet ahead of Andrew's car.
Z didn't believe me when I told him how my car can snap you back into your seat harder than Tim's. So I dropped into 2nd gear at about 2500RPM and punched it. How's your neck?

Originally Posted by Tony View Post
Did Olson have ClubSport rims and Helium in the tires again?
Goddamn it Tony! You're giving away all my secrets.

There was also some extra caricular co-ed activity later on...

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