I am looking to buy a C5 in the near future and want a '97-'98 (for the price). Someone told me not long ago about getting a 2001 instead because they said some improvements were made to the car in regards to the stiffness of the chassis. Can you tell me what they were and would there be any cons to purchasing a '97-00? I plan to pull the motor and trans and put some happy parts in them. Maybe change the gears in the rear end too.

Thanks, I am new to all this Corvette stuff so bear with me. And I did do a search on this topic but didn't pull up anything.

Tony

 

some one on their website posted all the changes by year - I will see if I can find it.

 

starting in 2001 (short list)...

*Active Handling became standard equipment.
*There was a major re-write of the AH/TC software to make it less intrusive
*A4's no longer have the column lock mechanism
*2001 LS1's got the larger diameter Z06 MAF sensor.
*starting mid 2001 production year, LS1's got the LS6 block, intake & exhaust manifolds

what does all this add up to ??? That's where your judgement comes in.

 

Here you go.

http://www.corvetteactioncenter.com/.../2001over.html

 

^^ good link ,

but watch out for oil consumption, many of the 01 models had it....

 

^^Very true!!

"Oil woes
Many late 2000 thru 2001 Vette's burn a lot of oil when the engine is kept constantly over 4,000 rpm's. This is caused by ring flutter, which allows extra oil to seep past the oil control rings, but doesn't seem to cause any extra wear to the engine. Chevrolet has rebuilt and replaced engines for owners that complained about excessive oil consumption. Their policy is that while the engine isn't normally operated like that outside of racing, it is the owner's prerogative to drive around in second gear all the time if they want to. It is covered under the warranty.

The PCV system also has a tendency to suck oil back into the intake at high rpm's. It doesn't seem to cause any problems, other than a slight mess inside the intake manifold. The newer style PCV system can be installed, but this requires removing all the components in the top of the engine valley. Usually only racer's bother with the hassle. Several generations of PCV systems have had the problem, and at this time, December 2004, the PCV system still sucks oil into the intake.

The oil-sucking problem will cause carbon buildup in the cylinders. The dealership sells GM Top End Cleaner, and Napa sells SeaFoam. The Top End Cleaner is not available in some smog states like California. Run a tube from the bottle into the hole for the PCV system behind the throttle body on the passenger side. Start the car, then start slowly sucking the solution into the engine. Don’t go too fast or the engine could lockup. As soon as the solution is gone, stop the motor for >4 hours, but preferably 12 hours. Be aware that when the engine is restarted, there will be a LOT of smoke!

The oil-sucking can be prevented by installing a catch can. AMW and Greddy make catch cans, but a homebuilt catch can may be built using a Campbell-Hausfield air tool oil separator from most tool stores, including AutoZone. The AMW and Greddy cans are ~$100, but look great. The CH can is $15-25 for all the parts, and you can see how much oil is in it."

For more see this thread:

http://forums.corvetteforum.com/showthread.php?t=984927

 

Differences by year:

1997
* Completely new, redesigned Corvette. Base (FE1) and Z51 (FE3) suspension packages.
* All Z51 cars include: Power Steering Cooler
* 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 all 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 Convertible change
* Chrome exhaust tips for coupe + Convertible
* 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
* 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 diameter 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:
* Hardtop body style
* Rear brake ducting
* Screened inlets on front fascia, without foglights
* F1 Supercar tires 265-17 front, 295-18 rear, on 17x9.5 and 18x10.5 (one inch wider, respectively
* 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
* M12 transmission with shorter gearing (1-2-3 analagous to MN6 with 3.90 rear diff
* Titanium exhaust system
* Lightweight windshield
* New, stronger clutch with redesigned master + slave cylinder
* Stronger rear differential (shotpeened ring gear)
* Red brake calipers (otherwise identical)
* Transmission overtemp warning light on DIC
* 6500 redline gauges with special checkering + Z06 font
* Redesigned PCV system to help combat oil burning
* Red LS6 Fuel Rail Covers (FRC's)
* FE4 Z06 suspension - uprated springs, bars (30mm/23.6mm), shocks (note front spring and rear bar same as Z51)

2002
* Z06 Changes:
* Z06 LS6 cam changed to: 0.551/0.547, 204/218 on 117.5
* Less restrictive intake airbox lid
* Descreened MAF
* Removal of pup-cats (total with changes = 405hp)
* Z06 shocks revised with less rebound for better launching
* Z06 brake pads revised for better stopping (generate more dust)
* Lighter, sodium filled valves w/ stronger valve springs
* Higher tension rings installed to prevent oil burning problems
* Slight piston redesign *
* Clutch strength upgraded.
* HUD available on Z06 (not avail '01 model year)
* 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.

 

Stay away from this type of "can". It is rated to only 125 degrees F - definitely less than engine bay temps in most areas. In addition, some of these CH units warn you not to use with synthetic oils. Crazing and cracking of the body may occur. If you want to see the accumulation of oil, use a glass body unit, not plastic!

 

Thank you very much. That was some great information. It seems like and awful lot was added prior to and during the 2001 model year.

Thanks again.

Tony

 

The "oil usage" was due, as you described high RPM, low load operation. In other words, driving around in first gear at 25mph/5000 rpm trying to sound/look "cool".

Also, a catch can DOES NOTHING to help with oil consumption via the rings, it is specifically to catch PCV oil.