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View Full Version : Viper TA Track Attack #6/7, VIR June 25-26, 2014



Bruce H.
07-27-2014, 01:44 AM
Those of you who have followed my track threads know that I’ve been racking up the miles and track days… 6000 miles and 7 days over the 9 weeks leading up to this 2 day event with Chin Motorsports at the iconic Virginia International Raceway. I had carefully searched for a car that was not only ideally suited to surviving the grueling demands of track days without the need to install track mods, but would also provide exceptional performance and an engaging and analogue driving experience on the road. I wanted a car that I could drive to and from distant tracks with little more than a helmet, had luggage space for two, and this Viper delivers 110%.

A couple of days earlier my wife and I loaded the car for a 10 road trip vacation that would take us through several states, and on to Washington and Philadelphia after leaving VIR, where we met up with a track buddy and his wife to track and travel with. The car performed brilliantly in this GT role over 2500 miles, and Deb posted her “Spousal Report” thread covering its Grand Touring attributes.

http://i49.photobucket.com/albums/f262/GT2860RS/Viper%20TA/Viper%20TA%20trip%20to%20VIR%20June%2014/DebscellpicturestoVIRtripJune14471_zpsa1d4b9e0.jpg (http://s49.photobucket.com/user/GT2860RS/media/Viper%20TA/Viper%20TA%20trip%20to%20VIR%20June%2014/DebscellpicturestoVIRtripJune14471_zpsa1d4b9e0.jpg .html)

I had run with Chin before at VIR, the last of 3 trips being in 2006, and ran in their Advanced Solo run group, alternating 30 minute sessions with a novice/intermediate solo group and an instructor/race group. It was my friend’s first time at VIR, but despite being a very advanced driver, he was placed in the novice group in his GT-R to learn the track with an instructor. Chin runs very safe and well-organized events. They’re excellent whether you’re a first-timer or expert, and you can choose their events at other iconic tracks across the US. Traveling the country to new tracks became a big part of the appeal, and my favorites so far include Road Atlanta, Mid-Ohio, Road America, Watkin’s Glen, Mont Tremblant, and my home track, Mosport (renamed Canadian Tire Motorsport Park).

http://i49.photobucket.com/albums/f262/GT2860RS/Viper%20TA/Viper%20TA%20trip%20to%20VIR%20June%2014/AMBA1192_zps2d5bcc7f.jpg (http://s49.photobucket.com/user/GT2860RS/media/Viper%20TA/Viper%20TA%20trip%20to%20VIR%20June%2014/AMBA1192_zps2d5bcc7f.jpg.html)

There was a very diverse roster of cars at this event, with my group dominated by some very quick Porsche, the faster ones being extensively modified. I met my buddy’s GT-R forum friend who tracks there frequently, he was very quick in his track-modded GT-R, and I enjoyed dicing it up with him for several laps in one session.

I met Viper racers Jim and Cathy Stout, owners of VIR, and L P Montour who was doing a shakedown on his new Comp Coupe that he was preparing to race in Toronto last weekend. I had met L P a few weeks earlier up at Mont Tremblant in Quebec, and he’s definitely a young driver to keep your eyes on. He and the Stouts have all trained with SRT’s Kuno Wittmer. I also met their team members, SRT Motorsports supplier Tom Francis, and Larry from Arrow Racing who was there tuning their ECU’s at pit wall throughout the event. Arrow dynos every Gen V engine, and Larry figures he had probably done mine. He “highly” recommended the tune for my use that will be coming out for the Gen V. VIR has garages with accommodations above them for rent and that’s were all three of their Viper race cars were parked and worked on between sessions.

http://i49.photobucket.com/albums/f262/GT2860RS/Viper%20TA/Viper%20TA%20trip%20to%20VIR%20June%2014/AMBA1185_zpscb18d38f.jpg (http://s49.photobucket.com/user/GT2860RS/media/Viper%20TA/Viper%20TA%20trip%20to%20VIR%20June%2014/AMBA1185_zpscb18d38f.jpg.html)

I expected Day 1 to be spent familiarizing myself with the track, and warming up my brain in preparation for being able to advance my skill at the wheel on Day 2. It was for the most part up until noon, but after that I was carefully exploring new limits. Every track presents different challenges and it’s very useful to experience them. VIR presents the following which you can watch for in the video:

Front straight (with pit-in, long garage along pit wall, and pit out). This is very fast with speeds exceeding 140 mph in the Viper. The 180 degree hairpin Turn 1 is torture on the binders, and among the most demanding on any track. A huge run-off area encourages you to stay in the throttle until the last possible moment, and if you don’t make it you simply run off safely. It also means you push the brakes harder than you would otherwise, and a couple of guys went agricultural there after standing on their brakes. My Supra’s brakes use to have serious fade here every lap, but the TA’s passed this acid-test with flying colors. The other challenge is the slight right kink half way along the straight, and is right where the track slightly crests and is off camber. It may not look like much on the track map but you’re pulling some g’s right there where grip feels tentative. My 6000+ rpm 4-5 upshift also fell right there, and you’ll see me short shifting and feathering the throttle a little just before the kink to avoid unsettling the car. My goal next time there will be to take the front straight flat, brake even later, and carry more speed into and through T1. If you can’t hear the tires protesting you’re just corning too slow.

Uphill Esses A few corners later you go under a bridge and the following left is the start of the esses. This is a very quick series of bends that are taken at high speed. The video shows me going in close to 125 mph and exiting the top at around 100. That’s a bit of a rush, and you have to get each bend right or it will throw you off for the next ones. Your hands are moving fast on the wheel, and slightly ahead of what you might think you need to for the car to react when it needs to. A video from behind would likely show the car drifting slightly. I worked on increasing my speeds through there, and would expect to progress to maybe 130+ mph both in and out at the top. You know you could have done it faster by the time you’re half way through, and that confidence would come with more practice.

Roller Coaster and Hog Pen At the end of the back straight is a gentle left where I do the second downshift from 5th on the straight to 3rd for this complex series of turns. They’re downhill, off camber in places, the car is partly unweighted, and you’re pretty focused on keeping the rear of the car from passing the front! Not all were successful, but fortunately there’s some room to go off safely. If you can string these together well it launches you onto the front straight with a higher speed that multiplies all the way down into T1.

The video shows the last 3 laps of a Day 2 session, and ends when the checkered flag is thrown at the Oak Tree Turn that leads onto the back straight. The first lap is clear of traffic and you get a sense of the layout and race line. The next couple of laps are moving through traffic. Chin passing rules require a pass-by signal from the car about to be passed. I wave off one at the end of the back straight because it was given late, but usually it’s safe to take a pass. These events are safe because the drivers know they are a cooperative between drivers, and not a competition. Like-minded and experienced driving enthusiasts doing what they love…and breaking no posted speed limits!

Select full screen and 1080p res...


https://www.youtube.com/watch?v=tOK1rV5O_Z4
https://www.youtube.com/watch?v=tOK1rV5O_Z4

So how did the Viper TA do? In a word…OUTSTANDING!!! The grip, balance, handling, braking, responsiveness, power, controls, seating position, and ergonomics are all perfect. The car does exactly what you want it to do, and it does it immediately. The car feels like an extension of your body, and controlling it is natural and effortless. The car is never a distraction to your attention to driving, and you’re never compensating for something lacking in the car, like bracing to support your body in the seat for a hard corner. I use a 6 point harness, but even the stock belts hold and support you well in the seat. Here's a shot of the display for peak G-Forces. Tire grip is very good. I haven't been on a track yet with banked corners but 1.50g left, 1.50g right, and 1.42g under braking doesn't seem too shabby for streetable track tires. I'd be cuious what others are seeing, and under what conditions.

http://i49.photobucket.com/albums/f262/GT2860RS/Viper%20TA/Viper%20TA%20trip%20to%20VIR%20June%2014/lightfixturephotos-VipertriptoVIR058_zpsc4edb7cf.jpg (http://s49.photobucket.com/user/GT2860RS/media/Viper%20TA/Viper%20TA%20trip%20to%20VIR%20June%2014/lightfixturephotos-VipertriptoVIR058_zpsc4edb7cf.jpg.html)

It was hot at about 90 F (32 celcius) degrees with high humidity. I monitored engine temps and it ran remarkably cool. The video shows all the temps displayed on the center screen in celcius (Cdn spec car). It’s common for high performance cars to have overheating and endurance issues on the track, and this event was no different. The owner of the highly track modified GT-R that I had diced it up with earlier boiled his power steering fluid after adding various auxillary coolers, ducting and upgrades to many systems and components. He feels that car is designed to handle only one or two hot laps for the all-important magazine tests. My friend had actually planned to take his new C7 to VIR instead of his GT-R, but a shake down day at a local track two weeks earlier exposed various issues that needed addressing before it could be tracked again. That is the case for many cars when driven at an advanced level, whereas the Viper is designed and tested by SRT for endurance on the race tracks... but you’re certainly welcome to use them on the street as well! Most viper owners wouldn’t be aware of this, and don’t recognize the capabilities of the car or the extent of the challenge that the SRT Viper team undertook. They did it because they themselves are serious racers and track rats, they built the car to race, and I feel fortunate to enjoy the fruits of their labor and passion.

Several drivers were faster on the first day, and it was obvious that there were many very experienced local track rats in my group. But by Day 2 I had dropped a few seconds per lap, running among the faster cars, realizing that I’ve only begun to scratch the surface of the TA’s performance limits. It could take a very long time for me to access them all. Hopefully years…and that’s just the challenge I’ve been looking for! My next track days will likely include data-logging as a tool to identify opportunities for improvement, and I look forward to sharing that experience.

Thanks for reading, I hope to see some of you at the track, and as always, thanks to the Viper team for creating such an uncompromising, unapologetic, capable and engaging exotic supercar.

Bruce

Boba Fett
07-27-2014, 05:54 AM
Another great write up Bruce

FLATOUT
07-27-2014, 09:08 AM
Love these write ups Bruce, I'll have to capture max G's next time I take it out. Didn't know you could do that.

Bruce H.
07-27-2014, 10:22 AM
Thanks guys. The Peak G-Force is one of the "SRT" pages and is accessed with the steering wheel buttons. There's instantaneous and peak g's, with peak stored until you physically reset it. So you'll be able to see the extent of your hooning since Day 1, although it won't be clear whether it was you or the parking valet that did it ;)

Brian E
07-27-2014, 10:32 AM
Keep these write ups coming Bruce. Great to see you and your wife are enjoying your TA. It's posts like these that I hope potential buyers read.

TwinVipers
07-27-2014, 11:25 AM
Very nice! Knowing that g force meter is there I'd probably kill myself trying to pin it past 2 Gs lol. Did you have any oh shit moments?

Jack B
07-27-2014, 12:08 PM
You are a credit to the viper community - excellent.

TrackAire
07-27-2014, 01:00 PM
Love the reports......these types of articles would be a huge asset to the drivesrt.com website. Hopefully SRT sets up an area on the website for the Viper track rats to does these types of reports.....talk about an awesome marketing tool.

Cheers,
George

Shooter
07-27-2014, 06:02 PM
That was a good write up and a good read. Nice job

Bruce H.
07-27-2014, 08:15 PM
Thank you very much guys. I think this is the ultimate test and expression of a supercar's performance, and the best way to appreciate the Gen V as an owner. Always happy to share with those who are interested!


The key is to work Very nice! Knowing that g force meter is there I'd probably kill myself trying to pin it past 2 Gs lol. Did you have any oh shit moments?

No moments at all on any days in the rain or dry, fortunately. Your question leads to some advice I wanted to share...it's important to exercise a lot of discipline in your driving, progressing slowly, focusing on one or two things to improve at a time, and keeping your ego in check. It's so easy to get caught up in the moment as you tear around a track, and sure as can be that'll be the time it happens...you run out of talent! Sometimes you're better to step back and get out of the car if you start to feel over confident.

allans
07-27-2014, 10:30 PM
Bruce, Thank you very much. It's really nice to read well thought out reports from fellow enthusiasts. I'm getting some good track time too and hope to visit VIR in the fall. I've been there before but, to show my age, the first time was in 1967 racing my Kawasaki A1R 250 Factory Racer. Too senior to race bikes now. but can still go pretty well in the TA. Best, Allan

jjfne
07-28-2014, 02:21 AM
Bruce,

What camera are you using?

Bruce H.
07-28-2014, 08:13 AM
Bruce, Thank you very much. It's really nice to read well thought out reports from fellow enthusiasts. I'm getting some good track time too and hope to visit VIR in the fall. I've been there before but, to show my age, the first time was in 1967 racing my Kawasaki A1R 250 Factory Racer. Too senior to race bikes now. but can still go pretty well in the TA. Best, Allan

Wow...that's awesome! What track time have you had so far in the TA?


Bruce,

What camera are you using?

It's a Mini 801 Pro dashcam. They've just come out with the replacement Pro 2...http://www.ojocam.com/

I have one installed all the time on the windshield that you can barely see in the video tucked up to the right of the rearview mirror. It's mount is permanently wired into power at the mirror using a power cord pig tail supplied with the car and records everything automatically as soon as the ignition is turned on. It can also record when parked using its built-in battery and motion and G-sensors if set for that, and it re-writes over old video in a loop so you never miss anything. Good to have video proof in case of an incident.

The track video shown here is recorded with a second Mini 801 mounted on a tiny bracket stuck on the bulkhead behind and between the seats. It uses a power cord I plug into the 12v outlet behind the cupholders between the seats, and I only use it each time I go on track. That way I don't re-write over it before downloading to my computer. The distorted audio is a drawback, but it has a lot of great features, including being able to remove from the car's mount instantly and use as a normal camera or videocam using its built-in battery.

J TNT
07-28-2014, 08:30 AM
Excellent post Bruce , glad to see you and your wife enjoying the car ! It is also great insight to potential new buyers :)
Look forward to seeing you both on our Fall Tour ! ;)

Nine Ball
07-28-2014, 09:51 AM
GREAT post. Love your detailed write-ups.

Tony

MtnBiker
07-28-2014, 11:15 AM
That looks like a fun track. Enjoyed the vid, especially at around the 6:15 Mark. Great stuff.

VENOM V
07-28-2014, 01:51 PM
Bruce, you have a talent for enjoying life and the gift of the gab for sharing it.

I'm swapping my old Corsas back on for Sears Point (Sonoma) this weekend because I don't have any way to haul my slicks. What hot tire pressures did Erich recommend? What were your typical cold pressures?

I'm having the Viper aligned today, going with camber of -2.8 deg front, -1.5 rear. I'm also having them check for bump steer through the full suspension travel per Erich's advice.

Dick Winkles said that there's no benefit to tuning the stock engine, did you hear differently?

Bruce H.
07-28-2014, 03:15 PM
Thanks, guys.


Bruce, you have a talent for enjoying life and the gift of the gab for sharing it.

I'm swapping my old Corsas back on for Sears Point (Sonoma) this weekend because I don't have any way to haul my slicks. What hot tire pressures did Erich recommend? What were your typical cold pressures?

I'm having the Viper aligned today, going with camber of -2.8 deg front, -1.5 rear. I'm also having them check for bump steer through the full suspension travel per Erich's advice.

Dick Winkles said that there's no benefit to tuning the stock engine, did you hear differently?

When I told Erich I have been running 30 psi hot per the general Pirelli recommendations for the Corsa he suggested 34 psi was better in his experience. I had been starting with 26 cold when aiming for 30, but I'll probably just start with the normal street 29 psi and just bleed off from there. I know they hit 38 it no time though so starting to monitoring after a few warm up laps would be a very good idea.

Good luck getting 2.8 if your car will give it to you, but he also said 2.7 would work;)

I don't recall Dick indicating that at all, and if he did I wonder if he was refering to those just using it on the street. The general conscenous among those in the know is there is a benefit, with a dyno showing worthwhile gains starting at 4500 rpm. It will also eliminate some issues when changing headers. It's the one mod I definitely plan to do, or do first, along with a bit more front camber like you're doing.

TrackAire
07-28-2014, 03:42 PM
Bruce,

Does your information system on your dash tell you what the pressures are per tire? If it does, how accurate is it compared to your handheld pressure gauge?

Bruce H.
07-28-2014, 03:56 PM
Bruce,

Does your information system on your dash tell you what the pressures are per tire? If it does, how accurate is it compared to your handheld pressure gauge?

Yes it does, and I know it's quite accurate when comparing at street pessures, but I don't actually use or refer to it at all at the track.

cashcorn
07-28-2014, 04:26 PM
Good Times! thanks for sharing, Bruce. I'm really looking forward to driving lessons & tracking in So Cal.

Brian E
07-28-2014, 06:32 PM
I'm having the Viper aligned today, going with camber of -2.8 deg front, -1.5 rear.

For reference, when my TA was on the alignment rack at Roanoke, the camber settings it came from CAAP with were -2.4 front and -1.6 rear.

Bruce H.
07-28-2014, 07:11 PM
For reference, when my TA was on the alignment rack at Roanoke, the camber settings it came from CAAP with were -2.4 front and -1.6 rear.

That's within the range of the stock TA alignment specs, but Erich was telling us at NVE that if your particular car could be set closer to 2.7-2.8 that will provide better grip on the track. I assume my TA is also within stock specs as well, and the front tire's wear does indicate that it could use slightly more camber even though I have a lot of street miles on mine. He also explained that you have to be careful adding more camber that it doesn't throw off other alignment specs. I missed part of that explanation Todd...do you recall the details?

VENOM V
07-28-2014, 08:06 PM
That's within the range of the stock TA alignment specs, but Erich was telling us at NVE that if your particular car could be set closer to 2.7-2.8 that will provide better grip on the track. I assume my TA is also within stock specs as well, and the front tire's wear does indicate that it could use slightly more camber even though I have a lot of street miles on mine. He also explained that you have to be careful adding more camber that it doesn't throw off other alignment specs. I missed part of that explanation Todd...do you recall the details?

Yes, there is a risk that when you go with that much camber, that you could introduce bump steer. Erich recommended to remove the springs and move the suspension through the entire suspension travel range. Ensure that bump steer is minimal, if any at all. And if there is a small amount of bump steer, to ensure that it is equal side-to-side. Finally, he said that you may need to sacrifice a bit of caster to correct for bump steer. Hopefully none of that will be an issue, but we shall see. My Viper is being aligned today. My alignment guy is a hardcore track guy and sets up lots of race cars, so he knew exactly what Erich's concerns were and how to address them. I'll let you know if he sees any issues or bump steer.

VENOM V
07-29-2014, 08:46 PM
Okay, just got my car track-aligned. It went well. He could have acheived -2.9 degrees front camber at the limit of adjustment, but went with -2.8 degrees front per Erich's recommendation. -1.5 degrees rear. He said it has just a tad of bump steer at both ends, not enough to worry about. Can't wait to track it at Sonoma this weekend, this baby is cambered out and ready to party!

bayviper
07-29-2014, 09:03 PM
Nice writeup, can't wait to get mine on the track!

Bruce H.
07-29-2014, 10:20 PM
Okay, just got my car track-aligned. It went well. He could have acheived -2.9 degrees front camber at the limit of adjustment, but went with -2.8 degrees front per Erich's recommendation. -1.5 degrees rear. He said it has just a tad of bump steer at both ends, not enough to worry about. Can't wait to track it at Sonoma this weekend, this baby is cambered out and ready to party!

That's awesome...nice job! And good to show that it is possible for those who want to get busy in the corners. The car will definitely corner even better now. My front tire temps were pretty even across the face the day I measured them with 2.5*, but with much less factory camber the outside edges would be roasting and losing grip when pushed. Glad it worked out.

I'm checking new Corsa tire prices now. I'll have pretty much worn out the fronts over the next two track days and I want to have the car perfect for personal coaching from a certain SRT factory race driver this fall!!! Definitely going to need a new thread for that day!

Bruce H.
07-29-2014, 10:32 PM
Nice writeup, can't wait to get mine on the track!

Awesome! You should talk with Venom V if you haven't already. He's got his fingers on the pulse of the whole Norcal Viper track scene!

VENOM V
07-30-2014, 02:14 AM
Nice writeup, can't wait to get mine on the track!


Awesome! You should talk with Venom V if you haven't already. He's got his fingers on the pulse of the whole Norcal Viper track scene!

Hey I just realized who BayViper is. Andy, we hung out together at Sanjar's Viper Party after the cruise through the winding roads of Morgan Hill. Good times! Looking forward to another get together soon. If you squint, you can just make out Andy's Black TA with orange stripes. One sweet machine.

6122

Bugeater
08-01-2014, 10:21 AM
What were your lap times? Havent been since they paved the paddock... jealous.

Bruce H.
08-01-2014, 11:06 AM
What were your lap times? Havent been since they paved the paddock... jealous.

Hey, post #1...welcome to the forum! Are you driving a Viper?

The video description mentions 2:13 I think, but I was running pretty consistent 2:14's in traffic. Good guys in the advanced group watching their mirrors and usually giving pass-by signals quickly. You can tell from the lack of tire noise that I'm driving pretty conservatively, and by my gear selection in corners that was a gear higher than what would be fastest. I always did the tight T1 in 3rd, when 2nd would have been much better on exit, and did the Oak Tree in 3rd as well, apexing at only a little above 2000 rpm. I can normally follow stock 911 GT3's around like that, and feathering off the gas on the straights to keep from hitting the ones that won't give you the pass signal. I think the video showed me grabbing 2nd at Oak Tree and going WOT closer to 3000 rpm as seen on the tach through the wheel. Most laps were pretty relaxed as I focused more on vehicle dynamics in the places I mentioned above rather than speed, although I may have subconsciously sped up a little when coming up on some of the faster cars;)

This car has a lot more in it, and is just waiting for the driver to let it off the chain a bit more!