It was a race lap - #7 of 18. The As worked really well because of the cool temps. The race day prior we also ran As but with temps at about 80 degrees lap times were slower and I conserved more so I could push late in the race.

Our target hot pressures are in the 38-39 Front and 36-37 Rear. If I recall, we ended up about 1 pound below that target after this run.

 

So. . . for a 20-30 minute lapping session, A6s are faster on cooler days, Rs are faster on hotter days. I have both, so just trying to figure out when to use each most effectively. That's pretty high for pressure compared to what I normally run, but I'll have to try it to see how it feels compared to where I usually run. Thanks for the info.

 

Pretty sure it was 20 minutes. It was the day 2 T2 (Group 5?) National race.

 

I would say A6s are always faster but the R6s may last longer and wont drop off as much. In the last 3 years I've only ever run an R6 in a race once (Heartland Park on the right front wheel we run an R because the As wont survive the carousel).

It all depends on how comfortable you are when the car starts skating around on you. In many cases I've run my fast lap after the tires went away and the car didn't feel as planted ... so even when they get hot, the As can still be the faster tire.

 

John George put together this great compsite video of the race at VIR:

http://vimeo.com/21732841

the FFRC track record was broken by three different drivers

 

Track: Buttonwillow Raceway Configuration 13CW, Bakersfield, CA
Date: 3 April 2011 with NCRC
Best Lap time: 2:07.58
Car: 2003 Performance 350Z coupe
Tires: Hoosier A6, 285/30/18 x 4
Brakes: Stoptech 332mm front kit with PF97, Brembo rear with PF97
Other Modifications: TCKline DA shocks, NISMO LSD, Hotchkis sways, Intake, Plenum Spacer, Pulleys, Shockwave Exhaust, ART pipes
Lap Notes (Rain, heat, etc): Dry

Pics to come.

 

Track : Horse Thief Mile CW (HTM)
Date: April 3, 2011
Best Lap time: 1:03.141
Car: 08 350z Nismo
Tires: Hankook RS-3
brakes: Stoptech 355mm all around
Temp: Low 60's
Other Modifications: Cobb Swaybars, Quaife Diff, High Flow Cats, Catback Exhaust, Cobb Stage 1 tune

 

Track: Thunderhill with bypass
Date: 4/16/11
Best lap time: 2:07.2
Car: 2010 370z Nismo
Mods: JRZ Coilovers, Brembo brakes, Hoosier R6, OS Giken LSD, Injen intakes, high flow cats
Weight: 3510 lbs with driver
WHP : 308
conditions: dry 75 degrees

 

Dayum!!

Great job! Unbelievable fast times...but I know it is real, saw it on MyLaps :icon38

Would you share your Traqmate data for that Lap or session?

 

I ran a 2:04.8 today similar conditions.

 

Nice. What group was that with? Must be NASA! Most don't run the bypass, the cyclone rocks!

 

Track: Mid Ohio Club Course Lexington Ohio
Date: April 10th 2011
Best Lap time: 1:41.832 (lap record was 1:41.695 and was beat by a Nissan 240 the same session I ran my best lap)
Car: 2004 Nissan 350Z Base
Tires: Hoosier A6; 255/35/18 (massive for 255's )
Brakes: OEM Brembos; Carbotech XP-10's in front; XP-8's in rear
Other Modifications: Zeal Function X Coilovers, Quaiffe LSD, Hotchkis Sways with SPL spherical endlinks, Motordyne 5/16" plenum spacer, Kinetix HFC's, Motordyne 3in single exhaust, Black Enkei RPF-1's, Braille 15lb battery, Oil cooler, APR GTC-300 Wing, Homemade wood front splitter, SPL front A-arms, SPC rear camber arms and weighed 3210lbs with me in it and about 1/2 tank of fuel.
Lap Notes (Rain, heat, etc): about 80 degrees, humid, windy and dry except for a little water in the chicane

 

Track: Autobahn South
Date: 4/17/11
Best Lap time: 1:37.5 (track was green from rain)
Car: 2003 Enth
Tires: 255 Hoosier R6
brakes: Stock Caliper with Hawk DTC60 pads
Other Modifications: Kronospark 2.5lbs Battery, OS Giken Close Ratio Gearbox, OS Giken Twin Disc clutch, OS Giken LSD, AST 4100 Coilovers, H-Sport Sway bars. Took the muffler off, Cheap DIY intake.
Lap Notes (Rain, heat, etc): Track was very green and cold so laps were off a bit.
Watch the last couple laps, MOV editing software costs money I refuse to spend so here is the whole session.
http://www.youtube.com/watch?v=dvVAlvnwLAg

 

Track : Spring Mountain Motorsports Park (SMMP) 3.1 mile config.
Date: May 15, 2011
Best Lap time: 2:39:488
Car: 08 350z Nismo
Tires: Hankook RS-3
brakes: Stoptech 355mm all around
Temp: Mid 70's
Other Modifications: Cobb Swaybars, Quaife Diff, High Flow Cats, Catback Exhaust, Cobb Stage 1 tune

 

Track : Spring Mountain Motorsports Park (SMMP) 3.1 mile config.
Date: May 15, 2011
Best Lap time: 2:42:295
Car: 03 350z Touring
Tires: Nitto NT05
brakes: Wilwood
Temp: Mid 70's

 

Looks like you have your car set up REALLY nicely

 

Thanks! I would like to think so. I need to go a little faster though to get that lap record. That time was on the 8th heat cycle on my A6's. I think on some fresh ones I can dip into the high 1:40's.

 

Just got back from Summit for the SCCA National where we ran T3 for the first time. Balance is a little off - moderate push in turn 1, 9 and 10 and big push in 6 through the carousel. We'll have to work on corner-weights to fix that. The ABS went wonky again too. Not what we're capable of, but pretty good for a first-crack at a T3 setup. Scaled at 3340 pounds after this run.

Track: Summit Point Main Track
Date: May 21, 2011
Best Lap time: 1:24.45x
Car: 2007 350Z HR
Tires: Hoosier A6 255/35/18 stickers
Brakes: Brembo
Other Modifications: SCCA T3 Spec - T3 Restrictor Plate, Springs, Bars, Custom Exhaust - Single Straight Pipe with Cats Removed, Custom UpRev Tune, Moton Triple-Adjustables, 3340 lbs.
Lap Notes: Mid 70s, mostly sunny, high humidity.

<iframe width="480" height="390" src="http://www.youtube.com/embed/ek4n1a0VU1Y" frameborder="0" allowfullscreen></iframe>

 

Track: MSR Houston, CW
Date: May 28, 2011
Best Lap time: 1:48.7
Car: 2008 350Z Nismo
Tires: Nitto NT01 275/40R17 Front, 275/40R18 Rear
Brakes: Brembo + DTC70 F&R
Other Modifications: HKS coilovers, bolt on, tune.
Lap Notes: High 80s, Mid 90s.


Just some split screen video... battery died in session 4.

http://vimeo.com/24442829

 

Track: Willow Spring Speedway, CA
Date: May 29, 2011
Best Lap time: 1:38.6
Car: 2004 350z
Tires: Bridgestone Re-01r Front, Bridgestone Re-11 Rear, 265 35 0R18 Square
Brakes: Brembo + Porterfield R4
Other Modifications: HKS Hipermax 3 sportcoilovers, bolt on, tune.
Lap Notes: High 80s, Mid 90s. Super Windy!

<iframe width="425" height="349" src="http://www.youtube.com/embed/mZ6WrUn3inU" frameborder="0" allowfullscreen></iframe>