Originally Posted by PowerLabs (Post 1587067251)

650/650 SAE certified HP/Torque.

You heard it here first ;-)

http://i529.photobucket.com/albums/d...s/IMG_9993.jpg

Originally Posted by SBC_and_a_stick (Post 1587085100)

So let us use some reason here with the information you posted.

A fully loaded Z51 weighs 3444lbs whereas the highest recorded ZR1 weight is significantly lower at 3405lbs.

Conclusion 1: Z51 weighs more than the C6 ZR1 according to magazine scales

The same Z51 was weighed on several corner scales by several different companies and the displayed weights were within a pound. In your words the "exact weight."

Conclusion 2: magazine scales are reliable

Conclusion 3: z51 weighs more than the C6 ZR1

It may or may not be 100lbs depending on the year of the cars in comparison and trim level but the general conclusion is quite elementary and supported by my data and yours. :chill:

Originally Posted by LS1LT1 (Post 1587085307)

:yesnod: That's why I think that the 2.41 rear might still be the preferred axle ratio for 1/4 mile duty in a stock/nearly stock car (LT1 or LT4) with the A8 transmission at least, potentially one less shift (possibly trip the beams while still in 3rd on stock height tires?) versus the 2.73s.
It comes down to whether the slight loss in sixty foot from the higher (numerically lower) rear gearing is cancelled out by one less shift. Traction limitations of the factory tires will play a role there as well of course.
Once the modifications and different tire heights/stickier tires enter into it, the 2.73s will likely be the better choice but I'm talking stock trim. :)

Originally Posted by LS1LT1 (Post 1587076668)

:iagree: Depending on drag strip location, track prep and time of year, it might not even need that much to dip into the high 9s, especially the automatics.
Higher stall converter, minor pulley swap (if it's possible), cold air intake, headers, drag radials and tuning could potentially get it there. :steering:
Again, as long as the car doesn't come in too heavy.

Originally Posted by Snorman (Post 1587084672)

So look at this the easy way and use the Z51 as a starting point. We know that the A6 cars cross the traps in 3rd and that a number of them (and not many have been taken to the drag strip yet, relatively speaking) have gone over 120 mph bone stock in decent air. And that's really getting close to optimal gearing for the 1/4, as the Z51's cross the traps at ~6300-6400. Going to the A8 (with 2.73's) is going to require double the shifts, or four versus two in the A6. There's a pretty substantial increase in torque multiplication in the A8 since it can make up for needing the OD gears in 7th and 8th. But I think the additional shifts are going to hurt it a little and IMO, the A8 cars are going to be ~.1-.2 quicker and maybe ~1-2 mph faster at most. I don't think it's going to be much at all.

So apply that to the Z06 making 190 hp and 185 tq more than the Z51. I figure it's going to pick up ~14 mph, and as long as the car can hook well, it should run somewhere in the mid-10's. Take my car for example. Let's say it's a race weight (couple gallons of gas and a ~230# driver) of ~3540 and making 460 hp. It calculates out to running 11.5 at 118 at sea level. Which is really not that far off considering I have ran a little slower in higher DA and a little faster in lower DA. Apply the same calculation to a C7 Z06 with a raceweight of ~3600# (assume a curb weight of 3450# with full tank of 114.7# of fuel, subtract 90# for lower fuel level and add ~230# driver). It calculates out to 10.3 at 131.

IMO, the A8 cars are going to run pretty solid 10.5's in the 131-132 range in decent air assuming they are hooking as well as the Z51 A6's do. In better air...who knows. But it's safe to assume they will freaking fly at tracks like MIR, Cecil, Englishtown, Atco or any other sea level track that gets decent air including those in Florida and along the east coast (Rockingham, OSW, PBIR, etc.).

As far as top speed...who knows. Maybe 195 with all the aero in place. That's not really a metric that's important to me, as the tracks I run on put me at most in the 160-170 mph range in my current track car. In the Z06 I would guess I'd pick up 5-7 mph, which really starts to push the limit of my comfort zone in a "street car".
S.

Originally Posted by ZL-1 (Post 1587087569)

Will they offer 2.73 in the Z06 auto?

Originally Posted by Shurshot (Post 1587090895)

Hey S,

With all this talk about new stock Z's going low 10's or maybe high 9's under "perfect conditions, "............

What is the current time break for when roll bars become mandatory requirement for a car to have before being allowed to run on a "open to the public" drag strip?

Thanks in advance :cheers:

Originally Posted by QUIKAG (Post 1587091036)

What surprises me looking at the curves, the top part of the powerband between the LS9 and LT4 isn't dramatically different. A lot of the gain is in the mid-range torque. Top end horsepower is a marginal 12hp at a lower rpm.

Will make an interesting roll race with a slight nod to the C7 Z06.

Originally Posted by Shurshot (Post 1587090895)

Hey S,

With all this talk about new stock Z's going low 10's or maybe high 9's under "perfect conditions, "............

What is the current time break for when roll bars become mandatory requirement for a car to have before being allowed to run on a "open to the public" drag strip?

Thanks in advance :cheers:

Originally Posted by QUIKAG (Post 1587091036)

What surprises me looking at the curves, the top part of the powerband between the LS9 and LT4 isn't dramatically different. A lot of the gain is in the mid-range torque. Top end horsepower is a marginal 12hp at a lower rpm.

Will make an interesting roll race with a slight nod to the C7 Z06.

Originally Posted by Snorman (Post 1587091338)

But you have to admit, it's pretty awesome that we're talking about whether or not a Z06, that will probably start in the $75-90k range (just to cover everybody's MSRP guesses), can beat the previous "King of the Hill" Corvette.
:yesnod:
S.

Originally Posted by Paulchristian (Post 1587081861)

The king is not dead...he will reestablish his dominance soon...give it a few years. In the meantime, GM will sell some ZO6s. :thumbs:

Originally Posted by Shurshot (Post 1587090895)

With all this talk about new stock Z's going low 10's or maybe high 9's under "perfect conditions, "............

Originally Posted by NemesisC5 (Post 1587093815)

I would say with a high degree of confidence a nine second pass will not happen in a stock C7 ZO6 on DR's considering its expected weight. A couple of benchmarks to review and provoke thought.

Originally Posted by NemesisC5 (Post 1587093815)

I would say with a high degree of confidence a nine second pass will not happen in a stock C7 ZO6 on DR's considering its expected weight. A couple of benchmarks to review and provoke thought.

Originally Posted by Lavender (Post 1587093937)

Here some food for thought..:rock:

Originally Posted by racerns (Post 1587093976)

While I agree that 9s on drag radials for an otherwise stock C7 Z06 may not be atainable, you ZR1 example is not a good bench mark. In that pass Ranger was not launching to the full extent since it was not his car. A stock ZR1 (on drag radials) had done a 10.2 and 10.3 ets when it has pulled a 1.5X 60' time. With that in mind, in the right conditions I could see a stock C7 Z06 go low 10s on drag radials.