928 Dyno Day in Green Bay Results (aka Sharks in Titletown)
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.
10-06-2010, 09:33 PM
#33
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Tune for any gear, any load.
http://www.dynojet.com/automotive_dy...o/default.aspx
Our hills are holy
http://www.sacred-destinations.com/u...-hill-basilica (shot my avatar from the top of the tower).
10-06-2010, 09:46 PM
#34
Nordschleife Master
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
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.
10-06-2010, 10:29 PM
#35
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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.
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!!!
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
10-06-2010, 10:46 PM
#36
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10-06-2010, 11:39 PM
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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.
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.
10-07-2010, 01:29 AM
#39
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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?
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?
10-07-2010, 01:40 AM
#40
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
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
10-07-2010, 09:19 AM
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BTW Stuart, I will update your chips to the latest version. Send me an email.
10-07-2010, 09:27 AM
#45
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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, 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.
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.
Goddamn it Tony! You're giving away all my secrets.
There was also some extra caricular co-ed activity later on...
