LS7 Fuel Economy
01-17-2005 | 12:19 PM
#21
TECH Enthusiast
Joined: Jun 2004
Posts: 554
Likes: 0
Originally Posted by taz99
Thats what J-ROD posted in this forum not too long ago. Check that thread if you dont belive me,
Those numbers WERE for the base C6 in both auto and manual. The Z06 is "TBD".
You're confused because the columns were a bit awkward, the formatting didn't match. I made the same mistake at first too... but look closer, and keep tabs on where the columns are *supposed* to be.
It's pretty clear that's for the base C6 once you look a little closer.
01-17-2005 | 12:22 PM
#22
TECH Enthusiast
Joined: Jun 2004
Posts: 554
Likes: 0
In case you don't believe me, here is his quote:
That would be where the C6's specs are listed first, then the Z06's specs. Clearly, it talks about the automatic C6, then the manual C6, and then when it gets to the Z06, it says "TBD".
Hope that settles this confusion...
Originally Posted by J-Rod
Models: Chevrolet Corvette coupe and 2006 Corvette Z06
Body styles / driveline: 2-door hatchback coupe with removable roof; rear-wheel drive (coupe);
2-door hatchback coupe with fixed roof; rear-drive (Z06)
Construction: composite body panels, hydroformed steel frame with aluminum and magnesium structural and chassis components (coupe);
composite and carbon-fiber body panels, hydroformed aluminum frame with aluminum and magnesium structural and chassis components (Z06)
Manufacturing location: Bowling Green , Kentucky
Engine 6.0L V-8 LS2 7.0L V-8 LS7
Displacement (cu in / cc): 364 / 5967 427 / 7011.3
Bore & stroke (in / mm): 4 x 3.62 / 101.6 x 92 4.125 x 4 / 104.8 x 101.6
Block material: cast aluminum cast aluminum
Cylinder head material: cast aluminum cast aluminum
Valvetrain: OHV, 2 valves per cylinder OHV, 2 valves per cylinder
Fuel delivery: SFI (sequential fuel injection) SFI (sequential fuel injection)
Compression ratio: 10.9:1 11:1
Horsepower
(hp / kw @ rpm): 400 / 298 @ 6000 500 / 373 @ 6200
Torque (lb-ft / Nm @ rpm): 400 / 542 @ 4400 475 / 657 @ 4800
Recommended fuel: 93 octane (recommended but not required) 93 octane
Estimated fuel economy
(mpg city / hwy / combined): automatic: 18 / 25 / 21
manual: 19 / 28 / 23 TBD
Body styles / driveline: 2-door hatchback coupe with removable roof; rear-wheel drive (coupe);
2-door hatchback coupe with fixed roof; rear-drive (Z06)
Construction: composite body panels, hydroformed steel frame with aluminum and magnesium structural and chassis components (coupe);
composite and carbon-fiber body panels, hydroformed aluminum frame with aluminum and magnesium structural and chassis components (Z06)
Manufacturing location: Bowling Green , Kentucky
Engine 6.0L V-8 LS2 7.0L V-8 LS7
Displacement (cu in / cc): 364 / 5967 427 / 7011.3
Bore & stroke (in / mm): 4 x 3.62 / 101.6 x 92 4.125 x 4 / 104.8 x 101.6
Block material: cast aluminum cast aluminum
Cylinder head material: cast aluminum cast aluminum
Valvetrain: OHV, 2 valves per cylinder OHV, 2 valves per cylinder
Fuel delivery: SFI (sequential fuel injection) SFI (sequential fuel injection)
Compression ratio: 10.9:1 11:1
Horsepower
(hp / kw @ rpm): 400 / 298 @ 6000 500 / 373 @ 6200
Torque (lb-ft / Nm @ rpm): 400 / 542 @ 4400 475 / 657 @ 4800
Recommended fuel: 93 octane (recommended but not required) 93 octane
Estimated fuel economy
(mpg city / hwy / combined): automatic: 18 / 25 / 21
manual: 19 / 28 / 23 TBD
Hope that settles this confusion...
01-17-2005 | 12:36 PM
#23
Teching In
Joined: Oct 2002
Posts: 35
Likes: 0
From: B.C, MI
Originally Posted by GuitsBoy
Please tell me you hate your job and how much it sucks. I invision working designing engine components to be the coolest job in the world, and im rediculously jealous...
incidentally, I stand corrected regarding DoD. That makes sense, although i didnt know it was lifter actuated. I knew that chrysler's dod was though.
incidentally, I stand corrected regarding DoD. That makes sense, although i didnt know it was lifter actuated. I knew that chrysler's dod was though.
Anyway on topic the DoD lifter is pretty hefty. Only remote located part is the on/off oil control solenoid. All the lift loss components are in the lifter itself making it ~ 1/2 again as long as a regular hydraulic roller lifter.
01-19-2005 | 08:13 AM
#24
Teching In
Joined: Oct 2002
Posts: 35
Likes: 0
From: B.C, MI
Just chatted with the engineer that is on the GM account. GM does spin the DoD lifters up to 7500rpm. They run a modified square wave test (idle to 7500rpm) and hold @ 7500rpm for 5 seconds. Test is repeated three times. They are only looking for part failure and not valvetrain dynamics. So in theory the DoD could go into the LS7. But the weight of the DoD lifter is still too high to get stable valvetrain dynamics so they won't put them in.
01-21-2005 | 12:31 PM
#25
The majority of Vette owners are not buying it for its efficiency. GM would get more flack than praise for installing the dreaded DOD. or dead on delivery lol. If GM does decide to install dod i'd hope it can be removed from the heads, if not, at least be able to disable it with hp tuners.
