[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]

go here
http://www.1le.net/
also click on manual gear box
http://www.f-body.org/tech/tech.htm

As far as the car comparisons go, We both had the same basic setup. Similar alignment, both have 35mm solid front bar, both have Koni Singles, Both with Hawk HP+ (but different brakes). I've even used the same tires on both cars, 710's, A3S03's, and Victoracers. For what ever reason my car just felt sharper. It transitions a bit better and the turn-in in mine is a tad quicker as well. Steering does feel a bit more responsive. Maybe I just take a while to adjust to different vehicles, but it sure felt like home when I hopped back into mine after a couple months off. Although looking at LS1 dynos vs LT1 dyno curves I wouldn't expect there to be a whole lot of performance difference. In fact the LS1 does have a higher peak but at a higher RPM. Down low it is respectable as well. The LT1 torque curve isn't a curve, its damn near table top flat. You should see my dyno plot, its flat from ~2000rpm all the way up to 4500+ rpm at around 274RWTQ. Anyway, seat of the pants feel my LT1 does feel better coming of the slower corners but the LS1 did scream down the longer & faster sections. Whatever the reason for the differences I no longer plan on ever buying an LS1 F-body.
If you are really serious about it then maybe you should arrange to have a couple co-drives in both types of properly setup cars and make up your own decision.
By the way, mine still has the worn out 139K+ mile suspension bushings on it.