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Old 04-06-2008, 07:54 PM
  #81  
Peak350
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Originally Posted by rkemp1
Test n tunes normally get you about 5-6 runs on a normal day but when we rent out the track your only sharing the track with about 20 other guys so that means run as much as you want!
I got to run as long as I wanted (aka till the clutch broke) last week. If I hadn't broken I would have gotten 15-18 runs this week. Some test and tunes can get you plenty of runs.
Old 04-06-2008, 08:06 PM
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Screamin350Z04
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If theres a Z track day let me know! My car is stock and I have a set of nittos my buddy is letting me borrow after I get some good runs on the stock tires
Old 04-06-2008, 09:26 PM
  #83  
VeeTec
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Here's one way you can test the tire pressure theory, on a closed course.

Do a little burn out with the stock pressure, then lower it down to 18-20 lbs, and do it again.

You should have a nice even contact patch, observed with the acceleration scuff marks, with the stock pressure, as the tires are designed to run at the level.

When you go too low, you should have dark outer edges, and light or very little marks towards the center, as the tire will bow from the lack of pressure, which causes the over deflection.

I learned about over defelection years ago, while in Accident Investigation school. You would be surprised how many people run with tires pressure which is too low, because they won't take the time to check.
Old 04-07-2008, 03:12 AM
  #84  
07Zroberts
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Originally Posted by rkemp1
Test n tunes normally get you about 5-6 runs on a normal day but when we rent out the track your only sharing the track with about 20 other guys so that means run as much as you want!
The last test n tune i went to i got about 25 runs in with my sti. i know its not normal to get that many runs but it hasnt been too bad at the test n tunes lately. If i have the extra cash ill run for sure but i doubt i will.
Old 04-07-2008, 05:11 AM
  #85  
DouBLeJ16
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Originally Posted by HDPD350Z
Where is the proof that the track is level? You cannot throw out one theory because of lack of proof yet hold another as true, even though there is lack of proof to back your beliefs as well.

If you go to Atco's website, they make no mention of it being a level or sloped surface. If you go to NHRA's website, no mention of either is made as well.

Anyone near there that could take GPS readings at the staging area and finish line? That would indicate proof, yet I'm not aware of anyone who has done so.

So far, all I'm going by is Google Earth, which indicates a downhill slope. That is, however; more evidence than there is indicating it it a level surface.
I think it's really funny that you're using google earth to find the elevation.. I work for a civil engineering company and we tryed to check elevations on google earth compared to surveys here..

They're off by 10-15 ft. most of the time. You can't use google earth to check the elevation on a small area like that, it's completely worthless.
Old 04-07-2008, 06:24 AM
  #86  
Datona Jess
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Great time,
Awesome driving congrats
Keep trying to hit 12's with it!
Old 04-07-2008, 06:36 AM
  #87  
HDPDZO6
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Originally Posted by DouBLeJ16
I think it's really funny that you're using google earth to find the elevation.. I work for a civil engineering company and we tryed to check elevations on google earth compared to surveys here..

They're off by 10-15 ft. most of the time. You can't use google earth to check the elevation on a small area like that, it's completely worthless.
Know of any other available resource then? Short of actually traveling there...
Old 04-07-2008, 10:02 AM
  #88  
Gooey
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when I ran my stock tires, I ran stock pressure. Summer time round 38-40psi.
I pulled many 1.9-2.0's with it
Old 04-07-2008, 10:29 AM
  #89  
Peak350
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Originally Posted by HDPD350Z
Know of any other available resource then? Short of actually traveling there...
Depending on the area, some placed have laser topographical images available. I know I can get a lot of it for my area and for SE coastal FL, but its knowing who to e-mail to get it in my case.

Some mapping software has accurate stuff, but google earth might be using outdated quad maps.
Old 04-07-2008, 10:55 AM
  #90  
HDPDZO6
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Originally Posted by Peak350
Depending on the area, some placed have laser topographical images available. I know I can get a lot of it for my area and for SE coastal FL, but its knowing who to e-mail to get it in my case.

Some mapping software has accurate stuff, but google earth might be using outdated quad maps.
I'll look. I also agree about some of the images being outdated. Just so happened, for that track, elevation was recorded (it isn't for some tracks).

I checked different websites for elevation info, and depending on the source, it varies anywhere from being listed at ~33 feet or ~90 feet.
Old 04-07-2008, 12:17 PM
  #91  
Peak350
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Originally Posted by HDPD350Z
I'll look. I also agree about some of the images being outdated. Just so happened, for that track, elevation was recorded (it isn't for some tracks).

I checked different websites for elevation info, and depending on the source, it varies anywhere from being listed at ~33 feet or ~90 feet.
What I was saying though, is there was a survey done around the 1920's, and more thoroughly in the 1930's (for some areas) that gave 5' elevation changes. They are plotted on what are called quadrangle maps (USGS did the survey for what its worth). Those have no been digitized into GIS mapping systems for most local government areas so that users can access the information more quickly. Because of that google has little trouble in getting information, just that if the track was regraded during its construction, and the information google shows is from the quadrangle map, it won't be the same...
Old 04-09-2008, 08:34 PM
  #92  
07_350z_JP
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Originally Posted by Peak350
I got to run as long as I wanted (aka till the clutch broke) last week. If I hadn't broken I would have gotten 15-18 runs this week. Some test and tunes can get you plenty of runs.
let me know you go back to the gains track. I went tonight and while I saw plenty of Z/Gs in parking lot nobody was running. I need more practice and perhaps your wisdom.
Old 04-09-2008, 09:19 PM
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Peak350
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Originally Posted by 07_350z_JP
let me know you go back to the gains track. I went tonight and while I saw plenty of Z/Gs in parking lot nobody was running. I need more practice and perhaps your wisdom.
That was our group. I'm broke because of my clutch, gimme a couple weeks and I'll be there.
Old 04-10-2008, 09:39 AM
  #94  
S8ER95Z
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Originally Posted by Peak350
That was our group. I'm broke because of my clutch, gimme a couple weeks and I'll be there.
Warranty repair?
Old 04-10-2008, 10:02 AM
  #95  
Peak350
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Originally Posted by S8ER95Z
Warranty repair?
Not even close. Abuse snapped the pressure plates bands (guessing) after repeated heat cycling.

1300 or so total cost for flwheel and clutch installed
Old 04-11-2008, 02:17 PM
  #96  
Pat Bateman
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I hitting that "downhill track" again tonight but the temps are much warmer, around 70 degrees now. Borrowed a helmet too. And I'll post up any decent slips...hopefully better ones.
Old 04-11-2008, 02:21 PM
  #97  
Peak350
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Originally Posted by Pat Bateman
I hitting that "downhill track" again tonight but the temps are much warmer, around 70 degrees now. Borrowed a helmet too. And I'll post up any decent slips...hopefully better ones.
I doubt you'll improve with the temp differences. I'd be surprised if you beat the 13.239 I posted from ~70 degree temps to be honest.

Be careful btw...verdict was I flew the flywheel so it flexed forward and back
Old 04-11-2008, 02:26 PM
  #98  
Playboy's Z
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nice run man
Old 04-11-2008, 04:12 PM
  #99  
3hree5ive0ero
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Originally Posted by Peak350
Be careful btw...verdict was I flew the flywheel so it flexed forward and back
^ What exactly does that mean (causes, results, effects, etc)? What are its symptoms (readily noticeable and the unnoticeable)?
Old 04-11-2008, 04:20 PM
  #100  
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Originally Posted by 3hree5ive0ero
^ What exactly does that mean (causes, results, effects, etc)? What are its symptoms (readily noticeable and the unnoticeable)?
+1 what does flew the flywheel mean?


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