Tino

I recall some time back that someone posted a chart that indicated the enhancements GM made to each model year. Does anyone have that link.

Tino

Elite Engineering

C5 Yearly differences in models

1997
· Completely new, redesigned Corvette. Base (FE1) and Z51 (FE3) suspension packages.
· All Z51 cars include: Power Steering Cooler, xx, xx, ??
· 97-00 C5 LS1's produce 345 HP @ 5600 RPM and 350 Ft Lbs of torque @ 4400 RPM.

1998
· Convertible becomes available
· Active Handling becomes available late in year
· The two slots of a 1998 (and possibly late 1997s) curve toward the rear at the bottom. (versus straight down)

1999
· 26# injectors substituted for 28#
· Fuel pump revised to reduce noise
· FRC "Fixed Roof Coupe" aka the hardtop, becomes available. All FRC's are MN6 (6-speed) cars with the Z51 suspension package, and are about 60lbs lighter than coupes.
· HUD introduced
· only one line in driver's side fuel rail cover (no fuel return line?)
· Power telescoping wheel becomes an option
· ? Steering hardware changed to combat wandering
· door sill trim plates added

2000
· Millennium Yellow available
· ? "Thin Spoke" versus "wagon wheel" design wheels become standard.
· Pup cats added to CA models for LEV emissions requirements (5hp loss relative to 97-99)
· Steel swaybar endlinks instead of plastic on Z51 equipped cars
· Z51 swaybar diameters grow (25.4/21.7 to 28.6/21.7 to 28.6/23.6 (note: new rear same as Z06)
· No keyhole on passenger side doorhandle
· Passenger airbag 'off' switch added to console (light by TC/AH button)

2001
· return to 28# injectors for all models.
· Second Generation Active Handling
· Nassau Blue discontinued
· Alternator 'clutch' pulley added on A4 cars
· New soundproofing + foam in all cars
· Smaller keyfob
· electrochromic dimming rearview and driver's mirrors
· lighter AGM battery
· Thickness + Material in vert change
· Chrome exhaust tips for coupe + vert
· 85MM MAF with integral temp sensor (versus 74mm with separate plug for IAT)
· LS1 cam profile changed to: .500/0.500, 198/208 on 115.5LSA (From: 0.472/0.479, 202/210 on 117)
· All Corvettes now have the LS6 intake manifold
· All Corvettes now have the LS6 engine block (windage passages in block), which includes a beefier oil pump.
· LS1 changes result in new output of 350 HP @ 5200 RPM and 375 Ft Lbs of torque @ 4400 RPM (MN6)
· Hardtop/FRC discontinued
· Pup cats added to all models
· Stronger synchros in all transmissions
· Exhaust manifolds revised (5hp regained) - thin wall cast replacing SS manifolds
· metal valvestem caps (late year)
· Torque Tube changed from metal-matrix composite to aluminum alloy 6061, increased in dia from 55 to 63 mm.
· Driveshaft couplings have also been upgraded on manual-equipped models for additional strength and durability
· Introduction of the Z06, which has as differences:
o hardtop body style
o rear brake ducting
o screened inlets on front fascia, without foglights
o F1 supercar tires 265-17 front, 295-18 rear, on 17x9.5 and 18x10.5 (one inch wider, respectively
o new LS6 top-end with new style head design (10.5:1 compression, 64cc chamber), LS6 cam (0.525/0.525, 204/211 on 116) - 385hp
o M12 transmission with shorter gearing (1-2-3 analagous to MN6 with 3.90 rear diff
o Titanium exhaust system
o lightweight windshield
o New, stronger clutch with redesigned master + slave cylinder
o Stronger rear differential (shotpeened ring gear)
o Red brake calipers (otherwise identical)
o Trans overtemp warning light on DIC
o 6500 redline gauges with special checkering + Z06 font
o redesigned PCV system to help combat oil burning
o Red LS6 Fuel Rail Covers (FRC's)
o FE4 Z06 suspension - uprated springs, bars (30mm/23.6mm), shocks (note front spring and rear bar same as Z51)
2002
· Z06 Changes:
o Z06 LS6 cam changed to: 0.551/0.547, 204/218 on 117.5
o Less restrictive intake airbox lid
o Descreened MAF
o Removal of pup-cats (total with changes = 405hp)
o Z06 shocks revised with less rebound for better launching
o Z06 brake pads revised for better stopping (generate more dust)
o Lighter, sodium filled valves w/ stronger valvesprings
o higher tension rings installed to prevent oil burning problems
o slight piston redesign *
o clutch strength upgraded.
o HUD available on Z06 (not avail '01 model year)
o Wheel supplier changed to Speedline, moved from forged to cast. Weight nearly identical
· Electron Blue color offered
· Steel endlinks changed to aluminum

2003
· Late model-year new fuel system design from C6's

2004
· Z06 shocks further refined. Accompanying upper front control arm bushing, and rear swaybar bushing changes.