Summit Point Shenandoah with Track Club USA

ChrisSlicks

Two days of glorious open track (6 hours track time a day). Aside from some overheating issues and a couple of mis-shifts I had a great time.

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Hotchkis ARB | Stillen CAI | Art Pipes | Berk CBE | Stillen AP Racing Brakes | AE Performance Oil Cooler | BC Racing ER Coilovers | Doran Control Arms

cossie1600

Nice, I never ran the short course as I had always use the pit straight, so can't make any direct comparison. What datalogger did you get? Was your car catching air under the bridge? I saw a little lag in speed under there. I actually spun there one time in the rain on my outlap, I was saved by the caroussel

ChrisSlicks

I borrowed a friends datalogger for a couple of sessions, I believe it is the MaxQ software logger. He was a bit over a second faster around the course in his C6 Corvette.

Yes the car would briefly spin the tires going over the crest, I took it a little easy in the couple of damp sessions we did until the tires had some heat.

Apparently not that many of the clubs run the pit straight as a screw up there sends you straight into the wall, LOL.

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cossie1600

I was actually almost 3 sec slower in my C6 than my 350Z, but the 350 had RA1 and the C6 had run flats. Yeah the pitwall was really close, but that's where I was setting up my passes as no one knew how to take it.

I just reviewed my logs, it looks like I lifted too, but you hit the bridge straight much quicker/deeper than I did. You were way quicker at the karussel too as I hit a low of 33 mph where you never dropped below 45. I think you can pick up time down the backstraight away by going in deeper, there is a lot of grip there. Of course there isn't much run off....

ChrisSlicks

This C6 has R6's, Penske coilovers, coilovers and AP Racing brakes
Here is video from his session, the white car in the distance is me, he sees me pit out at around the 9:00 mark and tries to real me in. I was on NT-01's at the time, he was on R6's.
TCUSA at Summit Point Shenandoah Circuit - YouTube

This was a demanding track, some of the high horsepower cars (Mustangs etc) were getting stomped on by prepped Miata's.

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takjak2

I managed to avoid being passed in that video ^_^ Was very nice meeting you and seeing your car in action. I do think the 1 series is at fault for your high temps. I'm going slower on street tires, but didn't ever get close to needing a cool down lap like in the video.

Here's one of my (low quality) videos from the same day; chasing down one of those high powered Mustangs. 10 Minutes on Shenandoah Circuit - YouTube

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cossie1600

God damn, HD exhaust!! I almost went deaf with my headset.

It seems like the car has way more than 400HP. Is the powertrain stock or does he have a LS3? The acceleration on it seems to be much better than a 400HP C6. You outdrove him quite a bit, that car has plenty more in it.

My friend popped out of the carussel and went into the tire wall. I also popped out in a Lotus but I didn't hit anything. I swore not to go back there again after that.

ChrisSlicks

I've moved the oil cooler hard up against the radiator so we'll see what that does. I think mainly I need bigger lines, the -8 lines that it came with aren't giving enough flow.

It was good to finally have another Z on track, and I'm sorry I didn't get to give you a ride to show you what sticky tires feel like on the car.

Nice and consistent in the video BTW.

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ChrisSlicks

He has a nice microphone to pick up the loud exhaust in detail

He has stock C6 engine, headers, and bi-modal exhaust, he might have a cam as well but I can't remember. He dyno'd at 380whp, so he has almost 100hp on me at roughly the same weight.

I didn't push the car super hard in the carousel, as I was afraid of the consequences. Plus I was already scraping the exhaust on entry as it was. The fastest Miata pulled about 2 car lengths on me through the carousel as he was crazy fast through there, I would get 1 back on the up hill.

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takjak2

Thanks, though it might be a good to avoid tire crack while I work on the driver mods.

Could be the lines, everyone with a Z1 kit has beefy AN -10, but I didn't think you had a thermostatic sandwich plate. So 100% of the flow should be directed to the oil cooler. Pressure will be higher with smaller lines but volumetric flow the same. Reductio ad absurdum if your lines were ten times larger, would you expect lower temps?

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ChrisSlicks

No thermostatic plate, however if I recall there might be a bypass. Also during the last oil change a ball bearing and a spring fell out, not sure if it was the plate or the back flow preventer in the filter as I mangled the filter pretty good trying to get it off.

Line size is only an issue if the line in the most restrictive point, if the cooler was the most restrictive point then increasing line size would be useless. The core was designed for up to -12 so I think -8 might be a little small.

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cossie1600

That's what I thought, stock LS2 C6 dynos around 345rwhp (http://www.youtube.com/watch?v=QEZpF1KfUOw). I couldn't figure out if I was driving slow or if that car was that much faster.

Yeah, I still have parts of my C6 around that corner somewhere. I hate to say it, it's a lot easier to fly in there when you are driving a car that you can replace with $3000 dollars.



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My memory from that track, much lower in quality, slower and much quieter. http://www.youtube.com/watch?v=7i9HmiznQ4o

Methodical4u

Awesome video man... really looks like a lot of fun! We were just talking about classes and such on another thread, but it looks like you were doing pretty well with the C6... I guess that is a car that on paper is supposed to beat the Z? I don't know much about the classes and such except for which cars are where.

ChrisSlicks

Summit Point Shenandoah was designed as a instructional track, as such it is fairly tight with not that much in terms of high speed sections. It makes the track more of a handing track than a power track and as such the fast Miata's were steamrolling the high horsepower but heavy supercharged Mustangs. The Corvette and myself had similar weight and were pretty close in terms of handling around here (he has expensive coilovers and a few mods). He was quick through most of the corners but I had a couple of places that I could make up time and he would toast me in the straights unless I got a really good exit the corner before. On a fast track like VIR or Watkins Glen he will be a good 5 or 6 seconds faster than me. I guess we'll find out in a couple of weeks when we hit WGI together.
If anyone is interested in signing up as a student this is the club: COM Sports Car Club
WGI is a little more expensive than most events but it is a huge track.

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Methodical4u

our little debate in the other thread ended up being RedZed and some of us talking about tracks and that his WRX has beaten the Z on some courses, where on the higher hp tracks it was a bit different.

I've had 2 Evo's so I know how quick they are even though i've never had one on a track. His point was that with the wider tires the Z has over the WRX makes it unfair, but with 265's on it he can run much quicker than a Z. My point was that with a computer controlled car (Symmetrical system Suby uses) that levels the playing field with the wider tires IMO. Hard to beat an AWD car with a comp that constantly monitors and transfers torque where it needs to be.