My VIR Video Study Guide
#1
Burning Brakes
Thread Starter
My VIR Video Study Guide
Merged a video of my best lap with Mark Nunnally's posted 2:02 lap. Used RaceRender to re-align the cars and measure the gaps along the way.
Besides the difference in driver skills, my car is not a T1 car and I'm not on A6s either. It's a daily driver on R6s that classes NASA TT3 (374rwhp and 3350lbs with the +0.05 adjustment makes 9.0lbs/hp.) I'd be willing to bet Nunnally could do a 2:05 in my car.
Left channel audio is my car. Right channel audio is Nunnally's if you want to isolate on something.
Besides the difference in driver skills, my car is not a T1 car and I'm not on A6s either. It's a daily driver on R6s that classes NASA TT3 (374rwhp and 3350lbs with the +0.05 adjustment makes 9.0lbs/hp.) I'd be willing to bet Nunnally could do a 2:05 in my car.
Left channel audio is my car. Right channel audio is Nunnally's if you want to isolate on something.
#2
Drifting
That's pretty cool how you did the comparison. In watching it though based on the video it doesn't seem like you're 6 seconds behind. You almost look neck and neck with him. Cool vid.
#3
Racer
I had to try the 245 tire thing just to see what it did, pretty big drop off in braking and turn in grip. The experiment "worked" because of the give-back you got for running small tires (run the car lighter, closer ratio gearbox, much better power to weight - something around 8:1 actual, 8.7 adjusted). It was pretty fast in a straight line, but it was not a very good all around set-up.
Looking forward to this Oct
Looking forward to this Oct
Last edited by drivinhard; 09-01-2013 at 08:12 AM.
#4
Burning Brakes
Thread Starter
After each segment I re-aligned the videos using RaceRender's synchronization tool and tallied up how much time I lost. So at the end I am within a second, but have already advanced my video by more than five seconds total.
#5
Burning Brakes
Thread Starter
I had to try the 245 tire thing just to see what it did, pretty big drop off in braking and turn in grip. The experiment "worked" because of the give-back you got for running small tires (run the car lighter, closer ratio gearbox, much better power to weight - something around 8:1 actual, 8.7 adjusted). It was pretty fast in a straight line, but it was not a very good all around set-up.
Looking forward to this Oct
Looking forward to this Oct
I don't know if 245s could be stretched beyond their spec'd rim widths to even fit on my wheels -- hell the C6 base coupe non-GS non-Z06 stock rear wheels are outside Hoosier's recommended widths.
#6
Racer
245/40/18 on base C5 rears 18x9.5". Fit is about like a 275/18 on a 10.5" wheel
#7
Le Mans Master
When I watched the clip there was some kind of voice track overlaid occasionally, was that intentional?
#8
Burning Brakes
Thread Starter
#10
Burning Brakes
Thread Starter
I've considered it, but have never run with NASA so I'm not sure what hurdles I'd have to clear. I have an active TT license with COMSCC and the amb transponder. Dyno sheet is years old but I haven't touched the motor so my HP numbers shouldn't be a problem other than getting them taken somewhere. Had the car corner weighted last year so the weights should be good too.
What would be the next step? Do I call the MidAtlantic guys to find out how to clear these hurdles or the SouthEast guys since I live in NC?
Thanks, Bert
What would be the next step? Do I call the MidAtlantic guys to find out how to clear these hurdles or the SouthEast guys since I live in NC?
Thanks, Bert
#11
Racer
I've considered it, but have never run with NASA so I'm not sure what hurdles I'd have to clear. I have an active TT license with COMSCC and the amb transponder. Dyno sheet is years old but I haven't touched the motor so my HP numbers shouldn't be a problem other than getting them taken somewhere. Had the car corner weighted last year so the weights should be good too.
What would be the next step? Do I call the MidAtlantic guys to find out how to clear these hurdles or the SouthEast guys since I live in NC?
Thanks, Bert
What would be the next step? Do I call the MidAtlantic guys to find out how to clear these hurdles or the SouthEast guys since I live in NC?
Thanks, Bert