[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]

IMO the LS1 gains you little on an autox course.

I don't care what one has dynoed at. You can SEE THE DIFFERENCE ON COURSE. The LT1 doesn't give up much if anything on course. Torque makes up for the HP deficet.

Example (I've got to use it since it was my best ever event at Peru). Sam and I leave at the same time. Both .5somethings at the light. Sam's LS1 vs my LT1. We hit the turn around the same time. And were close enough each time, I'm not convinced of any power advantage on an autox course.

Sam's car did have issues that event but mine did to, although much less severe.

Lonnie,

I agree that seems to be the case. What I was trying to say is that LT1's feel like they have more low end grunt to me and yet, I make more torque at 2500 than most of them seem to. Meaning, the LS1 isn't lacking low end grunt, but it feels like it is (compared to the LT1). I was trying to explain that the numbers say the LT1 does not have more grunt on the bottom (on paper), but they sure feel like they do. I'm open to explanations/suggestions as to why that is.

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.

This was what I was replying to. I was 300 to 317 ft lbs from that power band and the 300 ft lbs held on until 5200 rpm. That's 26 to 43 ft lbs in my favor (depending on the LT1's peak, I only have that info to use). And my car seems to dyno lower than most 2002's I've seen.

I didn't say LT1's were bad, slow or anything else. I was just making an observation that the numbers and the way they feel don't seem to match up. That's all, nothing else.