928 Dyno Day in Green Bay Results (aka Sharks in Titletown)
10-06-2010, 10:27 AM
#16
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Great numbers guys and looks like you had a great time! Makes me want to get an intercooler and change my pulleys! Years ago I used to drive for Schneider National in Green Bay and the people there are die hard cheese head Packers fans! Nothing like watching football wearing a snowsuit LOL!
As a mention to the GTR, they are super quick off the line but at highway speed they are similar to a boosted 928. I had the privilege of a roll on with one last week on a closed course, and we were even from 80 to about 120.
As a mention to the GTR, they are super quick off the line but at highway speed they are similar to a boosted 928. I had the privilege of a roll on with one last week on a closed course, and we were even from 80 to about 120.
10-06-2010, 11:33 AM
#17
Looks like another clear, clean, cold Green Bay day.
10-06-2010, 04:17 PM
#19
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Sounds like a great time Andrew!
The Gtech results explain your earlier 60+ pull with Tim quite nicely, whereas your tighter gearing keeps you in the run against the AT's broader hp range. Essentially the higher overall hp in the AT is negated by the lower rpm/hp at the bottom of each gear, so it see-saws a bit through each gear. Great stuff !!
Todd's 675whp - iirc, Lomas put down 650-ish with his white car as well...would be interesting to compare setup of both to see if the propeller heads think alike
Now what's the story on Hacker's 81 ?!?!
The Gtech results explain your earlier 60+ pull with Tim quite nicely, whereas your tighter gearing keeps you in the run against the AT's broader hp range. Essentially the higher overall hp in the AT is negated by the lower rpm/hp at the bottom of each gear, so it see-saws a bit through each gear. Great stuff !!
Todd's 675whp - iirc, Lomas put down 650-ish with his white car as well...would be interesting to compare setup of both to see if the propeller heads think alike
Now what's the story on Hacker's 81 ?!?!
10-06-2010, 04:25 PM
#20
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Sounds like a great time Andrew!
The Gtech results explain your earlier 60+ pull with Tim quite nicely, whereas your tighter gearing keeps you in the run against the AT's broader hp range. Essentially the higher overall hp in the AT is negated by the lower rpm/hp at the bottom of each gear, so it see-saws a bit through each gear. Great stuff !!
The Gtech results explain your earlier 60+ pull with Tim quite nicely, whereas your tighter gearing keeps you in the run against the AT's broader hp range. Essentially the higher overall hp in the AT is negated by the lower rpm/hp at the bottom of each gear, so it see-saws a bit through each gear. Great stuff !!
Todd's 675whp - iirc, Lomas put down 650-ish with his white car as well...would be interesting to compare setup of both to see if the propeller heads think alike
Now what's the story on Hacker's 81 ?!?!
10-06-2010, 04:50 PM
#22
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It's safe and sound in my garage 
Saturday was a "shake down" run that was supposed to happen on Thursday. Issues beyond the car got in the way so I'm a few days behind my October "hurry up before winter" time schedule.
If all goes well I'll be back on the dyno next week for my before tune, then the blower goes back on.
Shark Tuner worked great, didn't have a full day like I wanted to play with it (that was supposed to be Thursday). So I strapped down and did some quick adjustments just to make sure everything was still happy.
Blowing an LH late August / early Sept (memory fuzzy) didn't help any.
Don't worry, you'll be one of the first to know
Saturday was a "shake down" run that was supposed to happen on Thursday. Issues beyond the car got in the way so I'm a few days behind my October "hurry up before winter" time schedule.
If all goes well I'll be back on the dyno next week for my before tune, then the blower goes back on.
Shark Tuner worked great, didn't have a full day like I wanted to play with it (that was supposed to be Thursday). So I strapped down and did some quick adjustments just to make sure everything was still happy.
Blowing an LH late August / early Sept (memory fuzzy) didn't help any.
Don't worry, you'll be one of the first to know
10-06-2010, 04:56 PM
#23
Not the sharpest tool in the shed
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Andrew and Eric - I'm calling bs on this entire thread. Oh sure all those pics look authentic, even down to the people wearing Packers colors and all. Even a few holding a brew in hand. All convincing until I realized there was not a single pic of a brat anywhere. This to me is proof of your charade. Nice try.
Was this really all staged on a Hollywood backlot? Seems like so much trouble to round up all those actors. I swear I saw Jim Bailey in the background.... the consummate extra.
Was this really all staged on a Hollywood backlot? Seems like so much trouble to round up all those actors. I swear I saw Jim Bailey in the background.... the consummate extra.
10-06-2010, 05:06 PM
#24
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Don't be hurt Greg, I am sure that:
"Sharks in Titletown - Just as fun as Sharks in the Mountain, without all the hillbillies!"
Is meant to say:
"Sharks in Titletown - Just as fun as Sharks in the Mountain, could you imagine how much fun it would be with all the hillbillies?!"
"Sharks in Titletown - Just as fun as Sharks in the Mountain, without all the hillbillies!"
Is meant to say:
"Sharks in Titletown - Just as fun as Sharks in the Mountain, could you imagine how much fun it would be with all the hillbillies?!"
10-06-2010, 05:15 PM
#25
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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.......
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
Don't be hurt Greg, I am sure that:
"Sharks in Titletown - Just as fun as Sharks in the Mountain, without all the hillbillies!"
Is meant to say:
"Sharks in Titletown - Just as fun as Sharks in the Mountain, could you imagine how much fun it would be with all the hillbillies?!"
"Sharks in Titletown - Just as fun as Sharks in the Mountain, without all the hillbillies!"
Is meant to say:
"Sharks in Titletown - Just as fun as Sharks in the Mountain, could you imagine how much fun it would be with all the hillbillies?!"
10-06-2010, 06:35 PM
#28
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Putting Flame suit on.....
Not knowing much about how a dyno calculates power, I was curious about time to speed on an inertia type dyno in the attached video's. You basically have heavy metal wheels that your car is trying to spin up as fast as it can). It was interesting to see AO's car spin the metal wheels up in about 7 seconds on the first run, and then it took about 13.7 seconds or so on the second run. I have no idea what RPM you guys are starting from, but if it were the same for each car, say 2000 or 2500 each time, it was interesting to see the difference in time to max RPM between the two cars. Tim's time to speed on the 500+ hp run was about 14.4 seconds, or about .7 seconds longer than AO's second run in the video. I assume it was due to the better torque curve down low-but I don't know. This is just more of an observation then anything else. I have watched lots of dyno video on u-tube, and some very serious machines making 1200 to 1300 hp (even with the tires slipping on the dyno wheels) seems to accelerate the inertia wheels faster than the dyno operator can take is foot off the accelerator......so it puzzle's me how the dyno calculates that Tim's car is making more power, even when the higher HP car takes longer to accelerate the wheels.....maybe the gearing (5 spd vs Auto) has something to do with the time to accelerate the metal wheels?
Regarding the other video's I've seen on U-tube, I'm sure that each dyno has different weight inertia wheels so this would affect the time to speed. But as long as the computer knows the weight, it can do it's calculations.....
The reason I bring all of this up, is that when John and I dynoed our cars last weekend, I did the same thing with our individual dyno video's. His car spun the wheels up to speed in less time, and made 20 something more foot pounds of torque than my car (5.4 liter GTS vs S4). But my car made somewhere around 35 more horspower.......that's it. Rambling mode off.....
Not knowing much about how a dyno calculates power, I was curious about time to speed on an inertia type dyno in the attached video's. You basically have heavy metal wheels that your car is trying to spin up as fast as it can). It was interesting to see AO's car spin the metal wheels up in about 7 seconds on the first run, and then it took about 13.7 seconds or so on the second run. I have no idea what RPM you guys are starting from, but if it were the same for each car, say 2000 or 2500 each time, it was interesting to see the difference in time to max RPM between the two cars. Tim's time to speed on the 500+ hp run was about 14.4 seconds, or about .7 seconds longer than AO's second run in the video. I assume it was due to the better torque curve down low-but I don't know. This is just more of an observation then anything else. I have watched lots of dyno video on u-tube, and some very serious machines making 1200 to 1300 hp (even with the tires slipping on the dyno wheels) seems to accelerate the inertia wheels faster than the dyno operator can take is foot off the accelerator......so it puzzle's me how the dyno calculates that Tim's car is making more power, even when the higher HP car takes longer to accelerate the wheels.....maybe the gearing (5 spd vs Auto) has something to do with the time to accelerate the metal wheels?
Regarding the other video's I've seen on U-tube, I'm sure that each dyno has different weight inertia wheels so this would affect the time to speed. But as long as the computer knows the weight, it can do it's calculations.....
The reason I bring all of this up, is that when John and I dynoed our cars last weekend, I did the same thing with our individual dyno video's. His car spun the wheels up to speed in less time, and made 20 something more foot pounds of torque than my car (5.4 liter GTS vs S4). But my car made somewhere around 35 more horspower.......that's it. Rambling mode off.....
10-06-2010, 06:47 PM
#29
Supercharged
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Don't read too much into it. It has to do with a few things, but the most important one is the gear you do it in. I think the first one in my video is 4th gear, and then the second is 5th. 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.
We wanted a longer run so we could get enough time at each point in the power band to look for knock and such.
10-06-2010, 07:07 PM
#30
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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?
