blackbird00

iTrader: (11)

Bone stock from paper airfilter to the tires ran a 11.72 at with a 1.9 60'. First run he ran a 12.0. And this is in humid *** florida at moroso. Hell ya power to the LS7

UL LOSE

There is a guy on this forum with a bone stock C6 ZO6 running 11.3s@127 on the stock street tires and 11.2s@127 on DRs. Believe his name is Ranger or something.

Checkmate

iTrader: (2)

Yep, Ranger. I believe he is on here or search for him on corvetteforum.com

blackbird00

iTrader: (11)

ya ive seen his posts hes been driving the car for awhile now. This guy just brought his car out for the 2nd time and says he can do better by getting a better 60' im going friday to watch him run again. And ranger is in alot less humid climate and cooler air. Not hatin just sayin that for this guy to run that good in florida thats impressive.

Ranger

11.72 first day out is very good. Only a few have matched that. My first day at the track in the C6Z, four drivers also ran 11s.

Here is my sequence on the first 8 passes on stock tires. I was often getting booted for the sub-11.50 passes:

Day-1 Maryland International Raceway
11.489 123.97 1.844
11.403 124.87 1.783

Day-2 Cecil County Dragway
11.345 127.13 1.853
11.509 127.14 2.028 too fast squeeze of throttle in 1st gear

Day-3 Capitol; slippery down track
11.585 124.84 1.876
11.698 124.16 1.910

Day-4 Cecil County
11.380 127.53 1.929
11.310 127.52 1.902 The 330’-1320’ incremental was 6.31, a PR

I suspect that this fall, under favorable conditions, the time will drop to 11.20 plus or minus .03 and the trap will be about 127.80.

Ranger

Kent1

Very fast times for a stock factory car. If only they made one in an automatic....Nice times and excellent driving.

blackbird00

iTrader: (11)

That is very good Ranger. Damn good driver you are whats wierd is that his trap was like 122 i believe. Shouldnt it be at like 125??

Ranger

Thanks for the kind words.

Traps depend on shift points 1-2, 2-3, and 3-4. If those are sub-optimal, trap suffers. Speed of shifts, e.g. accumulated duration of clutch-in during the run matters too and weather.

Ranger

transam1998

iTrader: (5)

I have met 2 07 Z06 owners. First one at Mid Michigan Motorplex. Nice kid with a yellow one. I ran him once, 11.9 to his 12.1 @ 121 mph.
He kept racing and kept getting faster. last pass for him was 11.62 @ 126 mph. He came back and said that he hit the rev limiter just before the finish line.

2nd was a couple of weeks ago at US131 Motorsports Park in Martin Michigan. Another nice guy, his first few runs were sad, missing gears, traction loss, etc. I ran him once, had a crappy 2.1 60ft and turned my worst run of the night. His 60 ft was worse. I treed him a little so I still got down there first. His 12.0 @ 121 mph to my 12.1 @ 118 mph.
Towards the end of the night, he ran round robin, clicked off a 11.9 @ 122 mph, an 11.8 @ 122 mph, then an 11.7 @ 123 mph.

Denom

iTrader: (2)

I heard you were meticulous about your track times, and charting changes. Does it really help in the long run in your opinion, or is it just going out there and hoping for a good time? I just see 2 different approaches when I go to the track. I understand the importance of being consistant, it just seems like sometimes you get that one awesome pass that you can't seem to duplicate.

Ranger

Figuring out what works is a process that occurs quickest by being meticulous in keeping and analyzing the records of your performance. The path to improvement is the elimination of waste. Many aspects of the C6Z are counter-intuitive. They won't be discovered without analysis.

Ranger

Toonz

iTrader: (6)

Very well put.

Now if only May would get here so I can pick mine up!!!

Congrats to the drivers, those are excellent times!

qwikz28

iTrader: (12)

i have a question: why does the C6 Z06 trap 10mph higher then the C5 Z06 but only yield half second better times (for Ranger at least). i figured since the C6 is lighter that it would be easier to launch. (pardon my ignorance )

Ranger

C6Z06 faces two issues not found on a C5Z.
(1) the LS7 clutch
(2) Torque Management

The work-around to these issue will never be discovered by instinct-drivers applying the tried-and-true LS1/6 approaches.

Simply put. The C6Z will not permit a hard launch (LS7 clutch issue) and punishes a strong launch and shifts (Torque Management).

As things are on the C6Z, the clutch is the weak link on launch. It simply hangs if the launch is at too high an rpm (e.g. >3800).

That's actually ridiculous. The C5Z would take my 5200 launchea in stride.

The LS7 clutch seems averse to heat and the friction surfaces simply glaze at a lower temp. Hard to believe that is a design feature not a flaw.

I've written elsewhere that I glazed my C5Z clutch twice in 500+ passes. On the C6Z I glazed it once or twice each time at the track on DRs until I figured out that the flaw was in the clutch and not me being ham-footed.

Since that epiphany occurred, actually not too long ago, I've dropped the launch rpm to 3500 max and started tuning the speed of my throttle squeeze. This must be done carefully to avoid slip, which also will glaze the clutch.

The aspiration here is finding the proper mix of
(1) tire pressure
(2) perfect burnout without heating the clutch
(3) launch rpm
(4) super fast clutch release with essentially no slip
(5) faster throttle squeeze

Done right it should yield high 1.6X at 3500 launch rpm.

Regarding Torque Management...The effect of TM intervention on my C6Z at the drag strip is a loss is .2-.3 seconds. Power is pulled on launch and the 1-2, 2-3 shifts. The main purpose of TM is to reduce drive-line breakage. It achieves that, but at a cost of pulled power and slower times.

My experiments continue and reinforce my optimism that my C6Z will produce a 10.9X pass, bone stock on DRs using the right techniques.

Ranger

qwikz28

iTrader: (12)

i was wondering if anyone will ever get a 10.9x on stock tires?

speed_demon24

iTrader: (6)

I'm sure the hot/humid weather is killing times too right now.

speed_demon24

iTrader: (6)

Did you run your car too? And what was your trap speed with ur 12.73 time?

TLUZLS1

iTrader: (6)

Could you elaborate on the shift points affecting the trap speed? Which shift points would give a stock ls1 the highest trap speed?

Pro Stock John

iTrader: (34)

Of course trying to slip out a clutch that sits behind an engine making 450rwhp stock is going to more likely slip compared to the C5 Z06 making only like 355rwhp.

Ranger

Most of us buying the C6Z expected the clutch to provide stronger clamping power and heat-tolerance proportionate to the car's power.

You can install a Cartek clutch, for example, and execute a very strong launch with an LS7, just can't do it with the stock clutch.

I'm awaiting the day when the go-fast crowd starts making passes in a C6Z, for they will very quickly join the chorus of those complaining about the stock clutch and Torque Management...and will struggle to beat the Chevy spec for the car. Some of the usual launch techniques make the C6Z slower, not faster.

Ranger