Here are a few items from Dave Hill's presentation on the C6 Z06 at the C5/6 Registry Birthday Bash in Bowling Green, Ky. Some old stuff, some new stuff.... if GM can keep the price under $70k this car is going to fly out of the dealerships...

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The top speed will be substantially above 190 MPH.
The fender badge will show 505 HP.
Quarter mile on street tires in mid 11's.
The car has been tested on several race tracks with over 1,750 laps at top speed. Drivers included C6R team, and GM test people.
The car magazines will get a production built car for testing in July.
Next week they will air ship a production built car to Nurburing for testing.
93 octane is the recommended gasoline to use.
The car will have heavier duty half shafts, than the C5 Z06.
The rear axle ratio will be 3.42.
Car will be available with 6-speed manual only.
the aftermarket would be able to do better than this exhaust system.
the Zo6 could take a higher lift camshaft without any problems, saying the pistons have extra valve reliefs built in from the factory to accomodate a new higher duration cam with more lift.
they brought along a dyno sheet that appeared to be an engine dyno, 505hp and 470lb-ft, and 400ft. lbs all the way across the board from 2400 rpms on up.
Xm anttena aids in downforce
The crate motor LS7 would be around $15,000
The Z06 will use the same 6 spd as the base C6, not the optional Z51 gearing.
Front brake cooling improved over C5 Z06 by a multiple of 5 and rear improved by a multiple of 2.
Front fascia scoop operable and testing shows main benefit is to reduce air temperature entering engine...not so much to increase airflow due to bends in design necessary to eliminate possibility of water ingestion.
Downforce has been optimized and adding a rear wing or full width rear spoiler will negatively affect balance without changing size of front splitter, etc. A general principle but the engineers emphasized this issue when talking about raised height of the C6 Z06 rear CMSL, size of front splitter, etc.
Lowering the new Z06 to improve looks/stance will upset the balance achieved but if you do be very careful not to exceed the "magic number" of 3/4 inches or the performance loss outweighs aesthetic benefit. Also, be aware the C6 sits lower in front versus rear, unlike the C5.
They are working on a new "steel blue" color as shown on slides during presentation. Didn't say what model year it might appear.
Horsepower to weight ratio of the best (6.2lbs to 1hp) the exotic car makers have as only the Enzo and the mega dollar Porsche were superior.
No price release til June or July
There will not be a horse power bump in the 2007 Z06, there will not be a 525hp or 550hp 2007.
He explained the 2nd year Z06 got the bump to 405hp due to a break thru in better catalytic converters (I guess inferring they could meet the same emissions standards with a larger cam?)

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