[Tommy R]

Hey you all,

I'm looking for information on 4th Gen F-bodies. Specifically, I'm interested in the diff options, gearing differences (rear end and tranny), 1LE vs. base model specs, and any other differences from model year to model year.

For example, I know the '93s are speed density, not mass air. Are there any differences there from a performance or maintenance standpoint? The '93s also had a slightly different T-56 tranny, as I understand it. Were '93 and '94 models not available with 3.42 rear gears? Would a 150 mph speedo indicate that the car has 3.42's? No governor? I remember my old roommate's '94 T/A didn't have the "GT" package and as a result had the 115mph speedo, governor, and maybe even 3.23 gears (instead of 3.42s).

I know in '96 they went OBD-II with dual cats. They're also rated at an insignificant 10 hp more than the '93-'95 models. Of course, in '98 the LS1 came out with much more power. However, the LT1s are obviously still very compeitive in F-Stock, despite the power deficit, iron block, and smaller front brakes. Any particular reason for this? Or are the right people just not running LS1's? (IMG:http://www.frrax.com/rrforum/style_emoticons/default/unsure.gif)

So, needless to say, I'm intersted in LT1 vs. LS1 differences, too. But, I'll likely stay with the cheaper candidate, i.e. the LT1.

I should point out that I'd mainly be interested in F-Stock, so update/backdate concerns are of less importance. I'm not sure if/when I'd move to ESP.

Thanks in advance,
Tommy

[y5e06]

Batch fire really isn't that much of an issue. Only real problem w/ '92-'93 LT1's (including vettes) is you need to burn a chip instead of having the flash prom in the ECU. Lots of guys eak out tons o' power in the batch fire corvettes. Window motors tend to slow down and wear out. Straight forward enough fix. Seems to be common GM problem. Never had a compressor issue w/ my AC camaro, although I've gone through 2 on the Vette, one on the caprice, and need a third for the truck.
139K miles and I've never had a power steering pump problem.
I R&R'd the timing chain on my 114K mile Corvette this past spring (same engine), It looked great for wear. Didn't appear to have excessive slop. I don't think its much of a concern unless you already have the wp, opti, & timing cover already pulled off. Opti sparks suck, I've replaced at least half a dozen. Do the WP while your there too. Fit n Finish of F-bodies is absolutely horrid. It may be a big turn off for you, especially if moving out of the BMW quality. Want to get a good look over of a prime example of the higher mileage LT1? Check out mine at the next event (A&M).
Auburns do wear out, they are a clutch type of posi. You'd probably want to replace it each year just prior to nationals. If you buy a new one, you can have it rebuilt/exchanged for <$100. Karen can fill you in more about that.