[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

[trackbird]

I don't buy the more torque in the LT1. How many autocross's do you run where your RPM drops below 2500 rpm?? Not many, at least not here.

I think the low-end torque is better in the LT1. The power starts to "come on" sooner in the LT1 than the LS1, and I think there are enough "slower" turns at most events (even National level stuff) that it can make some difference.

When margins are less than a tenth, any difference matters. (IMG:http://www.frrax.com/rrforum/style_emoticons/default/dry.gif)

Karen

I thought that as well, and I'm not argueing with you. But, when I dynoed my car, it dynoed at 300 ft lbs or higher from 2500 rpm to 5200 and that seems to beat the 274 ft lbs listed earlier in this thread. This is my 2002 Z28, stock with a lid. The 2 graphs are 3rd and 4th gear. 4th is the higher line (I was just checking).

http://home.columbus.rr.com/trackbirdz28/i...201%20small.jpg

[edit] Remove the worlds largest dyno sheet and show it as a link [/edit]