A few random COTA laps
#1
Le Mans Master
Thread Starter
A few random COTA laps
So, I did my first track event since installing poly bushings, race seats, harnesses, and an aggressive track alignment. WOW. I cannot believe how much more comfortable I was not having to hang on for dear life in the awful stock Corvette seats. Also, after having run track days for over a decade, I admit to being quite an idiot for not realizing how much of a difference a good aggressive alignment can be. It woke up my Continental slick big time. These things gripped like crazy and the turn-in/response was incredible.
I had too much traffic to try to beat my previous street car lap record, but I have no doubt at all it will happen when the weather cools off and I can get a few clean laps with no traffic. I'll be shooting for a sub 2:20. I have a set of brand new Finspeed wheels/Michelin slicks waiting for the big day.
Here's a few random laps. Watch in 1080p for the best view:
http://www.youtube.com/watch?v=6nW0r...ature=youtu.be
I had too much traffic to try to beat my previous street car lap record, but I have no doubt at all it will happen when the weather cools off and I can get a few clean laps with no traffic. I'll be shooting for a sub 2:20. I have a set of brand new Finspeed wheels/Michelin slicks waiting for the big day.
Here's a few random laps. Watch in 1080p for the best view:
http://www.youtube.com/watch?v=6nW0r...ature=youtu.be
Last edited by QUIKAG; 06-11-2013 at 11:24 PM.
#5
#6
Le Mans Master
Actually, those trains seemed to be pretty well minded; looks like points were given fairly promptly in the passing lanes.
OP, I'm curious, how are your brakes wearing, and how well are the cooling systems keeping up? You're the only ZR1 owner I've seen that drives their car hard, that run you made at MSR running CW on the 1.7 was fantastic!
Have a good one,
Mike
OP, I'm curious, how are your brakes wearing, and how well are the cooling systems keeping up? You're the only ZR1 owner I've seen that drives their car hard, that run you made at MSR running CW on the 1.7 was fantastic!
Have a good one,
Mike
#7
Le Mans Master
Thread Starter
I honestly don't know how much was the camber and how much was the poly bushings, but the car truly felt amazing. The seats and harnesses also gave me a much better feel for what the car was doing. It was easier to drive faster when I had the opportunity. With fresh tires, I will easily knock seconds off my previous lap times.
It was awesome. I loaded the COTA Austin map and it just worked, everything was automatic. I need to figure out how to view all the data it stores and I hope to overlay my video laps with the data using Dashware. Just need to spend some time figuring that out. Unit is very well made and easy to use. I highly recommend it.
Hehe, I had no choice as we could only pass in specific areas of the track with a point.
Actually, those trains seemed to be pretty well minded; looks like points were given fairly promptly in the passing lanes.
OP, I'm curious, how are your brakes wearing, and how well are the cooling systems keeping up? You're the only ZR1 owner I've seen that drives their car hard, that run you made at MSR running CW on the 1.7 was fantastic!
Have a good one,
Mike
OP, I'm curious, how are your brakes wearing, and how well are the cooling systems keeping up? You're the only ZR1 owner I've seen that drives their car hard, that run you made at MSR running CW on the 1.7 was fantastic!
Have a good one,
Mike
I did have heating issues at COTA this time as ambient was around 95F and muggy. Oil temp peaked at 295F and coolant at 253F. Warning for coolant is at 260F. I slowed down and started short shifting at that point. Sessions were longer (20+ min) so that didn't help. Honestly the stock cooling system is pretty robust, but you just can't beat on the car for more than 15 min or so when it's hot out without getting the temps up.
I am keeping the powertrain 100% stock for warranty purposes including cooling. I do plan to go to water/water wetter to help efficiency though as I live in TX and won't drive it if it gets too cold and I did add that hood vent to replace the window. See below pic:
URL=http://s3.photobucket.com/user/quikag/media/photo14_zps49a6a919.jpg.html][/URL]
Last edited by QUIKAG; 06-16-2013 at 11:20 AM.
#8
Le Mans Master
Thanks for the reply. Something to consider on that hood vent; it's pretty close to a traditional high pressure point on the hood (highest is at the base of the hood/windshield). It might behoove you to put some yarn tufts on the hood vent and get some video of it next time you're out at MSR or somewhere.
Have a good one,
Mike
Have a good one,
Mike
#9
Le Mans Master
Thread Starter
Mike, could you clarify what I would be looking for with the yarn tufts? I'm a little confused (which isn't hard to do now as I'm at home on Norco recovering from a back surgery.).
#10
Le Mans Master
Do a search on "tuft testing" on Youtube. One example:
Essentially it lets you observe airflow in rough terms. If you see the tufts laying down flat the air is attached to the surface and usually is moving at a fairly high velocity, which equates to lower pressures and a better chance at good high pressure extraction. If the tufts are standing up, or moving forward, then the airflow has detached from the surface (i.e. "turbulent") and the pressure is close to ambient.
I'd put the clear cover back on to do your testing, as the louvers will trip the airflow by themselves.
HTH, and have a good one,
Mike
Essentially it lets you observe airflow in rough terms. If you see the tufts laying down flat the air is attached to the surface and usually is moving at a fairly high velocity, which equates to lower pressures and a better chance at good high pressure extraction. If the tufts are standing up, or moving forward, then the airflow has detached from the surface (i.e. "turbulent") and the pressure is close to ambient.
I'd put the clear cover back on to do your testing, as the louvers will trip the airflow by themselves.
HTH, and have a good one,
Mike
#11
Le Mans Master
Thread Starter
Do a search on "tuft testing" on Youtube. One example:
Tuft Testing - YouTube
Essentially it lets you observe airflow in rough terms. If you see the tufts laying down flat the air is attached to the surface and usually is moving at a fairly high velocity, which equates to lower pressures and a better chance at good high pressure extraction. If the tufts are standing up, or moving forward, then the airflow has detached from the surface (i.e. "turbulent") and the pressure is close to ambient.
I'd put the clear cover back on to do your testing, as the louvers will trip the airflow by themselves.
HTH, and have a good one,
Mike
Tuft Testing - YouTube
Essentially it lets you observe airflow in rough terms. If you see the tufts laying down flat the air is attached to the surface and usually is moving at a fairly high velocity, which equates to lower pressures and a better chance at good high pressure extraction. If the tufts are standing up, or moving forward, then the airflow has detached from the surface (i.e. "turbulent") and the pressure is close to ambient.
I'd put the clear cover back on to do your testing, as the louvers will trip the airflow by themselves.
HTH, and have a good one,
Mike
#13
Former Vendor
Member Since: Aug 2005
Location: Lewisville TX
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St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13
Our radiator would make a HUGE difference in temps....shouldn't have any issues with warranty with it in there, but talk to your service advisor. I know a few guys that track them stock...just for your reason and have done the radiator upgrade with no ill effects towards the warranty.
#15
Le Mans Master
Thread Starter
Our radiator would make a HUGE difference in temps....shouldn't have any issues with warranty with it in there, but talk to your service advisor. I know a few guys that track them stock...just for your reason and have done the radiator upgrade with no ill effects towards the warranty.
I ran with BMWCCA this particular time. It was $600 track fee for the weekend per participant and it was worth every penny. Everything is up the air for next year with COTA and DE organizations. Track management is still deciding whether they will let DE organizations run again next year or if they are going to go in a different direction (stick with private track days which are $$,$$$) or start their own DE school. So, it's TBD on what will happen down the road.
#16
Drifting
If you know of any other events down there I could get on LMK. Is there a resource to find out who will go on COTA? I will drive down this year if they are changing rules for next year.
#17
Le Mans Master
Thread Starter
There's nothing scheduled for non-professional racing the rest of this year besides maybe a few private track days that aren't advertised. If you have about $55,000, you and up to 35 or so buddies can rent the track for a day. It includes lunch if that sways your decision to shell out the cash. Just call the track and tell then you want to rent it and give them a credit card number with a big limit.
#19
Drifting
For a minute there I thought the guy in the white car was a left arm amputee.
Is it me, or are you just taking it easy? Doesn't look like you are pushing at all.
Is it me, or are you just taking it easy? Doesn't look like you are pushing at all.
#20
Le Mans Master
Thread Starter
Due to traffic and heat, I wasn't pushing nearly as hard as I was at the January Driver's Edge event at COTA. Though, with my new race seats, harnesses, etc. I don't have to work as hard to go faster now. Can't wait for better conditions to break my previous personal best.