C4 differences
I'm wondering what kind of c4 to get for around $12,000. I've narrowed it down to 85-97, but I can't decide. What are the acceleration times of the different years of c4 because I know they're engines change horsepower almost yearly during those years. And also, would you guys get a manual or an automatic, based on performance and longetivity of the transmission.
John
Edit: For $12k you are likely looking in the '88 - '92 model year range, depending on condition. General rule of thumb is to get the best maintained Vette you can. That doesn't necessarily equate to newest.
[Modified by Scoob, 11:15 AM 6/14/2002]
You need to narrow it down some. Vert or Coupe, Man or Auto? Have an idea which colors you like and cannot stand. Then start your search.
For that price range, you are looking at early years I would think. The 90 was the first year without the star wars dash and had the new interior. 92 was the first year of the LT-1.
http://cgi.ebay.com/ebaymotors/ws/eB...tem=1836228385
I would sure consider stretching the budget to get it if I wanted another vette.





The hp jumped considerably in '85 due to the TPI to about 230, but then didn't change much (5 hp in mid-86 w/alum. heads, 5 more hp in '87 w/roller lifters) and remained at or around 245 until the LT-1 engine in '92 (went to 300 hp).
The L-98 engines are known to be torquey engines that you can mod cheaply, but have somewhat anemic intakes that limit upper rpm horsepower and are usually ported to increase flow or replaced by a Super-Ram, Mini-Ram, or aftermarket/siamesed runners and lower intake if someone desires upper rpm performance (possibly at the expense of some low-end torque). The LT-1 has a higher peformance intake improving upper rpm hp, but due to having a different camshaft and intake supposedly does not have the "seat of the pants pull" off the line that the L98 motors have but will overtake a STOCK L98 from about 70 mph + (this is a subject of constant debate here on the forum, along with Vette vs. Mustang/F-body Camaros, manual vs. automatic, etc. I've noticed most are biased to what they own, as they should be. I would be.)
As far as transmissions go, the Doug Nash 4+3 manual has a reputation of poor reliability before '87 (as improvements were implemented in '86 I think), as well as requiring overdrive fluid changes every 15,000 miles or so. Big bucks if you have to replace/rebuild the OD unit. It is a very unique transmission in how it operates, however, as you have two gear ratios in 2nd, 3rd, and 4th gear to choose from and a kickdown feature in each gear like an automatic would have. I can tell you more if you're interested.
The zf 6-speed was introduced in '89 and was used through '96 I believe. It has a better reputation, although you'll hear a term CAGS which forces you to shift from 1st to 4th when driving at low speeds (for government fuel regulations) that is often disabled by the owners. You can search the archives for CAGS to find out how.
Automatics I'm not as familiar with yet, but since the ratio built of autos compared to manuals was usually around 3:1 (about 70% more autos made), I'll have to keep learning. The autos used were 700R4 (also known as 4L60) until '94, then were called 4L60E's (E for Electronic). The 700R4's had their share of problems that also were resolved sometime around '87 as they went from 27 spline shaft to a 32 spline shaft, or something like that. I believe the earlier ones also had front pump seals go bad, although I'm not sure on that either. At any rate, they made improvements over the years in engine, transmission, interior, etc. That is why everyone says get the newest you can afford. Mostly little details that can add up and make a big difference.
(And to think I've learned all this in 2 or 3 months! :crazy:) The best advice I can give you is to Search the Archives. There is a wealth of information, although it can take a long time to find it!
[Modified by OTCgrad, 5:07 PM 6/14/2002]
[Modified by OTCgrad, 5:08 PM 6/14/2002]


The Best of Corvette for Corvette Enthusiasts
Thread URL :
http://forums.corvetteforum.com/zerothread?id=316124
PIcs / INFO : Http://www.athomepc.net/vette-sale.htm
:D
The newer the better. For 5-6K you can buy a 84-86. There nice cars and a good place to start.
The opti is no big deal, but 300 ponies is!
Not to mention better ride, breaking, steering, comfort, resale.










