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Orthojoe's track build journal

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Old 06-14-2015, 09:34 PM
  #1111  
Mech33
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Originally Posted by MayorAdamWest
Despite the temps, I will say the brakes held up like champs. I didn't have to change my braking zone the entire day.
No issues on my stock brakes either, but I wasn't hammering them too hard.
Old 06-14-2015, 10:49 PM
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Manifold
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Sustained 1.6 G lateral grip is in the range of a cup car on slicks. I can't see a 991 GT3 on SC2 or Trofeo R getting close to that, except transiently. Check this out, keeping in mind significant camber of nearly all of the turns:


Weird to see rear tires wearing faster than fronts. Maybe something not right with alignment?
Old 06-14-2015, 11:01 PM
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orthojoe
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Originally Posted by Manifold
Sustained 1.6 G lateral grip is in the range of a cup car on slicks. I can't see a 991 GT3 on SC2 or Trofeo R getting close to that, except transiently. Check this out, keeping in mind significant camber of nearly all of the turns:


Weird to see rear tires wearing faster than fronts. Maybe something not right with alignment?
In regards to the difference in lateral Gs, it probably has something to do with differences in calibration. Internal accelerometer vs GPS calculated Gs. Plus with the solo you need to re-calibrate every time you change mounting position. I can see the trofeo R getting 1.4G in ideal conditions with my accelerometer. It gets 1.3 in extreme heat...

The mayor had his car aligned at a different shop than me and we are both seeing the same wear patterns. The extreme heat might have something to do with it...
Old 06-15-2015, 04:02 AM
  #1114  
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Originally Posted by orthojoe
I'm not sure there is any car that could handle that heat with no effects.
I did feel power Loss, 3:33 was best
brake feel was good, endless brake fluid
do order posted his pedal went to floor. he and I run same MC and front calipers. I'm on pfc08. so I think it's down to fluid.
Old 06-15-2015, 10:49 AM
  #1115  
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Default Orthojoe's track build journal

Originally Posted by mooty
I did feel power Loss, 3:33 was best
brake feel was good, endless brake fluid
do order posted his pedal went to floor. he and I run same MC and front calipers. I'm on pfc08. so I think it's down to fluid.
That and he drove for 50 minutes straight. Lol
Old 06-15-2015, 07:49 PM
  #1116  
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You guys are studs hammering around that track in 113F heat!!! It was hard enough the w/e before at 101F and limited driving time compared to the open session you had. I hope you had several beers at lunch time to keep you well hydrated?
Old 06-15-2015, 08:09 PM
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Originally Posted by Ducati1199
You guys are studs hammering around that track in 113F heat!!! It was hard enough the w/e before at 101F and limited driving time compared to the open session you had. I hope you had several beers at lunch time to keep you well hydrated?
Yes, or I get all herky jerky, smooths me right out. Smooth like budda..
Old 06-15-2015, 08:32 PM
  #1118  
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Originally Posted by orthojoe
In regards to the difference in lateral Gs, it probably has something to do with differences in calibration. Internal accelerometer vs GPS calculated Gs. Plus with the solo you need to re-calibrate every time you change mounting position. I can see the trofeo R getting 1.4G in ideal conditions with my accelerometer. It gets 1.3 in extreme heat...

The mayor had his car aligned at a different shop than me and we are both seeing the same wear patterns. The extreme heat might have something to do with it...
One thing that can explain high Gs is banking. Tracks that do Nascar or Indycar are usually heavily banked. Even Watkins Glen - I was getting 1.3G sustained there in M3 with Pilot Super Sports, just because it's so banked.
Old 06-15-2015, 08:41 PM
  #1119  
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Here's my car readout. May be transient, but I can tell you the Trofeo R grip is immense.
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Old 06-15-2015, 08:55 PM
  #1120  
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Kyrocks. The inbuilt display is transient I suspect. My AIM DL & Vbox do not correlate with it after a day at the track. The inbuilt display is always alot higher....
Old 06-15-2015, 08:57 PM
  #1121  
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Originally Posted by Macca
Kyrocks. The inbuilt display is transient I suspect. My AIM DL & Vbox do not correlate with it after a day at the track. The inbuilt display is always alot higher....
I have an aim solo DL as well. I will correlate.
Old 06-15-2015, 08:58 PM
  #1122  
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Originally Posted by kyrocks
Here's my car readout. May be transient, but I can tell you the Trofeo R grip is immense.
With SC2 and -2.0 cambers, my readout shows 1.60 Left, 1.73 Right, and 1.48 Braking. But with those being peak values, I don't place much value in them. Hitting curbs, etc. can generate fairly high transient peaks.
Old 06-15-2015, 09:00 PM
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Originally Posted by MaxLTV
One thing that can explain high Gs is banking. Tracks that do Nascar or Indycar are usually heavily banked. Even Watkins Glen - I was getting 1.3G sustained there in M3 with Pilot Super Sports, just because it's so banked.
For sure. In that vid I posted, compare the lateral G in T9 (which lacks camber) versus the other turns.
Old 06-16-2015, 01:06 AM
  #1124  
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Originally Posted by kyrocks
I have an aim solo DL as well. I will correlate.
Watching video with G display is the best way to determine what the breakaway G is. You can watch/listen for it while reading the output.

Originally Posted by Manifold
With SC2 and -2.0 cambers, my readout shows 1.60 Left, 1.73 Right, and 1.48 Braking. But with those being peak values, I don't place much value in them. Hitting curbs, etc. can generate fairly high transient peaks.
Exactly. I have plenty of 1.7 peak Gs, but those are transient from banking, dips, bumps, etc
Old 06-16-2015, 01:31 AM
  #1125  
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I freshly calibrate the G-sensor in the AIM Smartycam HD 2.0 every time I mount it to the cage. Like yours it then gives me an accurate overlay on the video feed. I see 1.1-1.2 with a max of 1.3 sustained on a warm day. We have a corkscrew and a lot of elevation on the track. My Porsche dash G-meter often reads 1.68 peak after an hard sessions. dont think Ive had it beyond 1.70 but I dont bounce of teh chicanes much...


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