C6 performance figures

C6 performance figures

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c4koh

Original Poster:

735 posts

245 months

Monday 28th June 2004
quotequote all
Just been over at digital corvettes:

www.digitalcorvettes.com/forums/showthread.php?s=&threadid=17312

... and apparently GM are now training their dealers about the new C6... and here are some performance figures (first I've seen anyway):

0-60 in 3.9s
1/4 mile in 12.6 @ 115mph
top-speed 186mph

All in all sounds quite nice...

yellowshark454

578 posts

242 months

Monday 28th June 2004
quotequote all
Kerist 3.9secs is a spectacular improvement. Can that be right? Is the C6 coupe lighter than the current Z06? Have the driveline ratios changed? One wonders what the C6Z06 will do.

Boosted Ls1

21,188 posts

261 months

Monday 28th June 2004
quotequote all
It's got bigger bores ie 4.000" and bigger capacity, 6.0 litres, plus the intake has been changed for an even better item. It takes a bigger throttle as well Rumour is that a lot of the new parts will fit our engines There is already a part number for the intake and at $350 or thereabouts that's a bargain. Thing is, nobody has managed to actually buy one. I don't need it because my home made intake will have twin 57mm chokes

c4koh

Original Poster:

735 posts

245 months

Tuesday 29th June 2004
quotequote all
yellowshark454 said:
One wonders what the C6Z06 will do.


I have read that it will be a 7.0L (i.e.427cu and probably using the same block then??), 3 valves per cylinder (still pushrod, but with a fork on the inlet side presumably) and be around 500bhp / 500lbft of torque.

I think Spring next year is when GM announce it, for sale in the Autumn 2005 for 2006 model year...

Boosted Ls1

21,188 posts

261 months

Tuesday 29th June 2004
quotequote all
c4koh said:

yellowshark454 said:
One wonders what the C6Z06 will do.



I have read that it will be a 7.0L (i.e.427cu and probably using the same block then??), 3 valves per cylinder (still pushrod, but with a fork on the inlet side presumably) and be around 500bhp / 500lbft of torque.

There is a rumour circulating about the 3 valves per cylinder but from what I've read I don't think that will happen for a long time.

I think Spring next year is when GM announce it, for sale in the Autumn 2005 for 2006 model year...

blackzr

280 posts

247 months

Tuesday 29th June 2004
quotequote all
[quote]It's got bigger bores ie 4.000" and bigger capacity, 6.0 litres, plus the intake has been changed for an even better item. It takes a bigger throttle as well Rumour is that a lot of the new parts will fit our engines There is already a part number for the intake and at $350 or thereabouts that's a bargain. Thing is, nobody has managed to actually buy one. I don't need it because my home made intake will have twin 57mm chokes[/quote]

The parts are available already, we have built one 383 with the new C6/LS2 block (improved internal breathing and revised bolt arrangement for the cylinder heads amoungst other things) and we fitted the engine with the FMU system (plenum, fuel rail, etc.)

LuS1fer

41,138 posts

246 months

Tuesday 29th June 2004
quotequote all
I think Chevy are traditionally optimistic about their figures but who knows? Possibly with a set of slicks...

Boosted Ls1

21,188 posts

261 months

Tuesday 29th June 2004
quotequote all
blackzr said:
[quote]It's got bigger bores ie 4.000" and bigger capacity, 6.0 litres, plus the intake has been changed for an even better item. It takes a bigger throttle as well Rumour is that a lot of the new parts will fit our engines There is already a part number for the intake and at $350 or thereabouts that's a bargain. Thing is, nobody has managed to actually buy one. I don't need it because my home made intake will have twin 57mm chokes


The parts are available already, we have built one 383 with the new C6/LS2 block (improved internal breathing and revised bolt arrangement for the cylinder heads amoungst other things) and we fitted the engine with the FMU system (plenum, fuel rail, etc.)

[/quote]

I read that the ls1/6 heads would bolt straight onto the LS2 block. Is that way off the mark or are there some extra bolts?

LuS1fer

41,138 posts

246 months

Wednesday 30th June 2004
quotequote all
Z51 Performance Package. The Z51 Performance Package brings Corvette Coupe performance very close to the same level as the widely admired Z06. The Z51 offers more aggressive dampers and springs, larger stabilizer bars, and larger, cross-drilled brake rotors for optimum track performance capability while still providing a well-controlled and comfortable ride. Extensive racetrack testing reveals that a C6 equipped with the Z51 suspension almost equals the lap time of a C5 Z06 - marking a major advance in the overall performance of a Corvette Coupe by nearly approximating the extreme performance capabilities of the vaunted Z06 at a remarkable value.

LS2 Powertrain

GM today announced the new 2005 Corvette will feature the most powerful standard engine ever in Corvette history: the 400 horsepower, 6.0-liter, small-block V-8. The new 6.0-liter LS2 is part of the fourth generation of GM's small-block engines. The small-block debuted in 1955 with 265 cubic inches and 195 horsepower. Since then, this legendary family of engines has been an integral component of Corvette's performance history.

Compared to the Gen III-based LS1, the LS2 incorporates several significant changes that help improve performance, reliability and serviceability:

-All-new aluminum block casting incorporates provisions for external knock sensors and revised oil galleries; external sensors improve serviceability
-Cylinder bore diameter increased to 101.6 mm (4.00 inches), increasing displacement to 6.0 liters
-Flat-top piston design with lower ring tension reduces friction
-Piston floating wrist pins help quiet the engine
-Revised exhaust manifolds are 33 percent lighter
-Compression raised to 10.9:1
-Engine redline raised to 6500 rpm
-Revised and more powerful engine mototronics incorporate all electronic throttle control functions.

The Tremec T56 six-speed manual is standard and the Hydra-Matic 4L65-E four-speed automatic is optional.

Corvette engineers thoroughly revised the Tremec gear box and added proprietary technology not offered on other automakers' high-performance transmissions. The six-speed transmission also has revised gearing when selected with the Z51 performance option. With the Z51, the Tremec is tailored with numerically higher gears to improve acceleration. Also, a lower fifth gear gives the Z51 better fuel efficiency and a higher top speed than base models. To increase durability in sustained high-speed situations, the Z51 and the base European manual-transmission models have a transmission cooler.

The available automatic transmission in the C6 is the new Hydra-Matic 4L65-E four-speed. An upgraded version of the C5's 4L60-E, the L65 is strengthened and revised to accommodate the LS2's 400 lb.-ft. of torque.