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Old 06-03-2013, 11:02 AM   #316
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Actually 6 vipers in the final!
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Old 06-06-2013, 05:46 AM   #317
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What do you guys start at for tire size
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Old 06-07-2013, 01:22 PM   #318
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What do you guys start at for tire size
For practice, I start with Rear 74 and front 67. For qualifying I start with 72/65.5 and do 2 rounds with that. Sweet spot is about 71/64.5
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Old 06-07-2013, 01:52 PM   #319
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What do you guys start at for tire size
I start 75 rear 68 front. Never ran under 72 rear 65 front. This will depend on ride height, track and tire compound. Start high then you have more tire to play with. After 3 mils you will have to clean them up, unless you have the perfect set up.
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Old 06-08-2013, 07:27 PM   #320
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For practice, I start with Rear 74 and front 67. For qualifying I start with 72/65.5 and do 2 rounds with that. Sweet spot is about 71/64.5
What about for qualify and final? Front:67mm/Rear:74mm?
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Old 06-09-2013, 05:34 AM   #321
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What about for qualify and final? Front:67mm/Rear:74mm?
BTW, the 977 requires an 8mm starting split F/R for the new internal drive ratio.

5+3warm-up=8 min Qualis ok for 66F/74R or as low as 64F/72R starting size.
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Old 06-09-2013, 06:45 AM   #322
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For practice, I start with Rear 74 and front 67. For qualifying I start with 72/65.5 and do 2 rounds with that. Sweet spot is about 71/64.5
What about tire angle? At what angle does one recommend to cut the rear tires?

the numbers above are for outside diameter?

Thx!
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Old 06-09-2013, 06:50 AM   #323
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For finals/mains it really depends alot on length of final. It is important to measure your tire wear during quals so you have a good idea of what to start final at. You want to be in that sweet spot by the middle of final when race hits a nice rhythm, but want to make sure enough rubber is there to carry you to end. For that reason I usually true 1mm over on the side that has more turns (right handers vs left handers)
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Old 06-11-2013, 01:32 PM   #324
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BTW, the 977 requires an 8mm starting split F/R for the new internal drive ratio.

5+3warm-up=8 min Qualis ok for 66F/74R or as low as 64F/72R starting size.
Hey Paulie

The 8mm split are you measuring from the inside or outside of the rear tire?
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Old 06-11-2013, 01:48 PM   #325
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I usually put the rears all the way into the jaws (which have a bit of a recess on the inside) So I'm kinda measuring the middle.
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Old 06-11-2013, 04:49 PM   #326
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Hey Paulie

The 8mm split are you measuring from the inside or outside of the rear tire?
Hey guys:
Always the outside rear or fronts. The insides to middle will wear as they wish based on chassis camber and track so we can't count on the inner measurement. For example, you may start with a trued tire with 1 degree of cut camber and by the time your done running it, the tire has 3 degrees of camber cut into the foam. Right? The more valid variable is the outer part of the tire.

I'll take a #3 and a Pepsi
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Old 06-11-2013, 10:17 PM   #327
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Hey guys:
Always the outside rear or fronts. The insides to middle will wear as they wish based on chassis camber and track so we can't count on the inner measurement. For example, you may start with a trued tire with 1 degree of cut camber and by the time your done running it, the tire has 3 degrees of camber cut into the foam. Right? The more valid variable is the outer part of the tire.

I'll take a #3 and a Pepsi
Hey Paulie,
When we true the tyre, we will also have to true the side of tyre , to make it
obtuse. When I set up my car, the camber is front:2degree,rear: 2.5degree. if i use trued tyres,will the tyre changes the camber? how to true tyre in 2degree
(Which I want the chassis camber is 2degree and 2.5degree.)
Thanks
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Old 06-12-2013, 06:43 AM   #328
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HI guys,just finish putting my viper together and wanna now what method you guys are using for rebound of the shocks.
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Old 06-12-2013, 11:37 AM   #329
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Why are guys cutting the holes out on the front bumper ? Is it just for weight
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Old 06-12-2013, 12:49 PM   #330
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Why are guys cutting the holes out on the front bumper ? Is it just for weight
Better corner entry.


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