• Two details marked the 1985 Corvette as being different from its newly-restyled 1984 predecessor.
• The first detail was a new Tuned Port Injection name­plate on fender molding and the second was the straight tailpipes at the rear.
• That nameplate identi­fied a new 350-cid (5.7-liter) V-8 under the hood.
• It had a tuned-port-fuel-injection (TPI) system and 230 hp.
• City fuel economy ratings went up.
• Otherwise, the only evident change was a slight strengthening in the intensity of the Red and Silver body colors.
• The Corvette's smoothly-sloped nose, adorned by noth­ing other than a circular emblem, held retracting halogen headlamps.
• Wide parking and signal lamps nearly filled the space between license plate and outer body edge.
• Wide horizontal side marker lenses were just ahead of the front wheels.
• The large air cleaner of 1982 was replaced by an elongated plenum chamber with eight curved aluminum run­ners.
• Mounted ahead of the radiator, it ducted incom­ing air into the plenum through a Bosch hot-wire mass-airflow sensor.
• Those tuned runners were meant to boost power at low to medium rpms, follow­ing a principle similar to that used for the tall intake stacks in racing engines.
• Electronic Spark Control (ESC) sensed knocking and adjusted timing to fit fuel octane.
• Under the chassis, the 1985 Corvette carried a reworked suspension (both standard and optional Z51) to soften the ride without losing control.
• The Z5l handling package now included 9.5-inch wheels all around, along with Delco-Bilstein gas-charged shock absorbers and a heavy-duty cooling system.
• The sta­bilizer bars in the Z51 package were thicker.
• Spring rates on both suspensions were reduced.
• Cast alu­minum wheels held P255/SOVR-16 Eagle GT tires.
• Brake master cylinders used a new large-capacity plastic booster.
• Manual gearboxes drove rear axles with 8.5-inch ring gears.
• The Corvette's instrument-cluster graphics had a bolder look and its root panels added more solar screening.
• An optional leather-trimmed sport seat arrived at midyear.
• Corvette stan­dard equipment included
  • an electronic information center
  • air conditioning
  • limited-slip differential
  • power four-wheel disc brakes
  • power steering
  • cornering lamps
  • a seek-and-scan AM/FM stereo radio with four speakers
  • automatic power antenna.
  • cigarette lighter
  • digital clock
  • tachometer
  • intermittent windshield wipers
  • halogen fog lamps
  • side window defoggers.
• Corvettes had
  • contour high-back cloth bucket seats
  • power win­dows
  • a trip odometer
  • a theft-deterrent system with starter interrupt
  • a compact spare tire
  • dual electric remote-control sport mirrors
  • tinted glass.
• Black belt, windshield, and body side moldings, plus color-keyed rocker panel moldings protected the bodies.
• A four-speed overdrive automatic transmission was standard, with a four-speed manual (with overdrive in three gears) available at no extra cost.
• Body colors were
  • Silver Metallic
  • Medium Gray Metallic
  • Light Blue Metallic
  • Medium Blue Metallic
  • White
  • Black
  • Gold Metallic
  • Light Bronze Metallic
  • Dark Bronze Metallic
  • Bright Red
• Two-tone options were
  • Silver and Gray
  • Light Blue and Medium Blue
  • Light Bronze and Dark Bronze
• Interiors came in Carmine; Bronze; Graphite; Medium Blue; Medium Gray; and Saddle.

I.D. NUMBERS

• The serial number [Vehicle Identification Number -- VIN] was stamped on a plate on the inner vertical surface of the left windshield pillar visible through the windshield.
• The Serial numbers ranged from 1G1YY07*7F5100001 to 1G1YY07*7F5139729

  Position	Character	Description
  1	1	US built
  2	G	General Motors product
  3	1	Chevrolet Motor Division vehicle
  4	Y	Type of restraint system
  5	Y	Corvette car line series
  6 & 7	07	Body style number: two-door hatchback coupe
  8	8	5.7-liter Tuned-Port-Injection (TPI) Chevrolet V8
  9	?	A check digit that calculates the characters in the serial number and gives it a single digit code and can be used to verify that the serial number is legitimate
  10	F	The model year where 1985
  11	5	Bowling Green, KY
  12-17	100001 and up	production sequence

• Engine serial number began 0001001
• Corvette engines have the last six digits of the VIN stamped on the block just ahead of the cylinder head on the right-hand side combined with a three-letter engine code suffix
• Also cast into the top rear of the block is a four-symbol code indicating when the engine was built
  • The first letter of the date code shows the month the block was cast
  • The one or two numbers shows the month
  • The last digit shows the year
• Engine suffixes:

  Code	Engine	Horsepower	Compression	Transmission	Fuel Supply	Extra features
  ZDF	L98 350-cid	230-hp V-8	9.0:1	THM automatic	tuned port injection
  ZJB	L98 350-cid	230-hp V-8	9.0:1	manual	tuned port injection
  ZJC	L98 350-cid	230-hp V-8	9.0:1	THM automatic	tuned port injection	for export
  ZJJ	L98 350-cid	230-hp V-8	9.0:1	THM automatic	tuned port injection	engine oil cooler
  ZJK	L98 350-cid	230-hp V-8	9.0:1	manual	tuned port injection	engine oil cooler

• The 1985 Corvette exterior colors were:
  • 13 = Silver Metallic
  • 18 = Medium Gray Metallic
  • 20 = Light Blue Metallic
  • 23 = Medium Blue Metallic
  • 40 = White
  • 41 = Black
  • 53 = Gold Metallic
  • 63 = Light Bronze Metallic
  • 66 = Dark Bronze Metallic
  • 81 = Bright Red
  • 13/18 = Silver and Gray
  • 20/23 = Light Blue and Medium Blue
  • 63/66 = Light Bronze and Dark Bronze
• Upholstery Codes

  Color	Cloth & Leather Upholstery	Sport Cloth Upholstery	Leather Upholstery
  Green	12C	12V
  Medium Gray	15C	15V	152
  Medium Blue	28C	28V	282
  Saddle	62C	62V	622
  Bronze	65C	65V	652
  Graphite			122
  Carmine			742

Model	Model No.	Body/Style No.	Body Type	Factory Price	Shipping Weight	Production Total
Corvette	1Y	Y07	2-dr. Hatch Coupe - 2 passenger	$21,800	3088	51,547

TRANSMISSION

• Automatic Transmission
  • Four-speed Turbo Hydra-Matic (TMH 700-R4)
  • floor-mounted gear shifter
  • gear ratios
    • 1st = 3.06:1
    • 2nd = 1.63:1
    • 3rd = 1.00:1
    • 4th = 0.70:1
    • Rev = 2.29:1
  • Final drive ratio: 2.73:1
• Manual Transmission
  • Four-speed manual with overdrive
  • floor-mounted gear shifter
  • gear ratios
    • 1st = 2.88:1
    • 2nd = 1.91:1
    • 3rd = 1.33:1
    • 4th = 1.00:1
    • overdrive = 0.67:1
    • Rev = 2.78:1
  • Final drive ratio: 3.07:1 (optional 3.31:1)
• Planetary overdrive ratios:
  • 2nd = 1.28:1
  • 3rd = 0.89:1
  • 4th = 0.67:1

• RPO AG9 Power driver seat ($215).
• RPO AQ9 Sports leather seats ($1025).
• RPO AR9 Base leather seats ($400).
• RPO Sports seats, cloth ($625).
• RPO AU3 Power door locks ($170). FIPO CC3 Removable transparent roof panel ($595).
• RPO D84 Two-tone paint ($428).
• RPO FG3 Delco-Bllstein shock absorbers ($189).
• RPO G92 Performance axle ratio ($22).
• RPO K34 Cruise control ($185).
• RPO MM4 Four-speed manual transmission (no-cost option).
• RPO UL5 Radio delete ($256 credit).
• RPO UN8 AM-FM stereo with Citizens Band ($215).
• RPO UU8 Delco-Bose stereo system ($895).
• RPO V08 Heavy-duty cooling ($225).
• RPO Z51 Performance handling package ($470).
• RPO Z6A Rear window and side mirror defoggers ($160)

• Chevrolet claimed a 17 percent reduction in 0-60 mph times with the TPI power plant.
• To save weight, Corvettes used not only the fiberglass leaf springs front and rear, but over 400 pounds of aluminum parts (including steering, suspension components and frame members).
• A total of 14,802 Corvettes had the Z51 performance handling package installed, 9,333 had Delco-Bilstein shocks were ordered separately and only 9,576 had a four-speed manual transmission.
• Only 16 Corvettes are listed as having a CB radio, and only 82 were sold with an economy rear axle ratio.

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