cody_98a4

hey guys just picked up my 2002 z28 today. Car looks to be bone stock other than exhaust. my buddy has a 95 or 96 trans am, with a large cam. No head work. He has full length headers, with a cutout, 4.10's, and huge rear street tires. anyway my bro has a stock 2002 corvette ( he's lucky i didn't have my vette out) M6 and we pulled a car and a half from a roll of about 45 then 30 same thing. from a roll he got us by a 2 cars until we shut down at about 110. his car runs really well and is EXTREMELY loud LOL...just curious how my 02 will stack up against him and what i can do to run his *** down

Antz97ZNJ

Sounds like a strong LT1...get a few bolt ons, that should even things up...

GRIDERMAN87

headers, gears, tune, then its goona be real close

henryz28

You will need more than headers and a tune; depending on how well you and your buddy can drive. He should kill you from a stop even with headers, gears and tune; your best shot is from a roll 30-40mph roll to over 100mph. I have a cam only full bolton lt1 and I will murder bolton ls1s but my a4 with the stall helps out a lot; I think its funny when people think my car will be slow because it's a auto, it is actually faster. I suspect your buddy is not the best of drivers.

GRIDERMAN87

I also have a full bolt on car with a cam, and im still gonna go with the ls1 with long tubes intake, and tune, if they have the same gear

henryz28

Its a drivers race the lt1 should pull from 1 to mid 2nd gear then the ls1 will start making up ground. Also if the lt1 has a set of drag radials the ls1 will be even worse off from a start. My buddy raced my other buddy a few years ago. One had a 2000 ss the other was a 1996 ws6 both m6 stock except exhaust on the lt1 and a slp loudmouth on the ls1. The ws6 kicked the ls1s butt, because they went from a stop and the lt1 had 315 drag radials. With both being m6 the driver really makes a big difference. These lt1s are not that much off of a ls1 car; for example a guy on ls1tech.com claims darn near beating a 2009 cts-v 556hp with a bolton lt1 car.

Antz97ZNJ

How can you make these predictions when all he said was the LT1 has a "big" cam. More then likely his 02 is putting out similar power. Put the right driver behind his 02 and I think things would be different..id also like to see what bolt on LS cars your murdering w/ a cam'd auto LT1, any decent 6spd driver should hawk your *** down by atleast the 1/8 and a stalled LS should get you out the gate.

cody_98a4

I can drive my car...seein as its an auto there isn't much to do. I also have a M6 vette i can drive very well thats not an issue. I thought the 02's z28's had the LS6 intake and were the fastest z28's? around 325rwhp? he shouldn't be much more than that should he...? i figured a set of 3.73's and i'd be in there but i could be wrong thats why im asking

henryz28

Yes it has the ls6 intake but still I don't see 325rwhp stock. My issue is not your driving its his, and depending on what cam, tune and supporting mods he has. The lt1 should have more low end torque, giving it the edge from a stop especially if you are on a stock auto. And yes my 1996 used to walk bolton ls1 m6 cars easily, but I have every bolton, some weight reduction, cam, 3000 edge stall, 3.42 gear rear, light suspension upgrades and 315drs; I would never run from a roll always from a stop, because I knew that's where I would pull the hardest. He should really pull from a stop if you are a stock auto and he is a good driver, I say your first mod has to be a stall if you plain on modding. There are cam only lt1s putting down 350rwhp depending on the cam and tune I say he is somewhere between 325-360 but its not the peek hp that is going to beat you from a stop its the torque. Here is a vid of what a good running cam only lt1 can do http://www.youtube.com/watch?v=iuS7AUBOIHM

Antz97ZNJ

Didnt know u were an auto...get your bolt ons, a good gear, intake/tb and a 4000 stall and send him back to the drawing board.

Wild Willy

I don't know why everybody keeps saying the LT1 makes more torque down low- well, at least most LT1 owners- from a 5 minute google search, data from the f-body forums:


Injuneer 01-02-2005 09:23 AM
The limited data quoted in the original post simply tells you the LS1 makes more torque at peak.... it doesn't tell you anything about low end torque. The Torque vs. RPM lines are not "straight".

I have a Corvette fuel injection manual covering the 91 L98, 92 LT1, and 97 LS1. It includes a small graph showing the torque curve for each engine. If you think about it, the Corvette factory numbers are probably more accurate indicators of each engine's actual performance, since the F-Body numbers were probably artificially reduced to keep it from looking like a better bargain than the Corvette:

L98: 340 lb-ft @ 3,200rpm
LT1: 330 lb-ft @ 4,000rpm
LS1: 350 lb-ft @ 4,400rpm

Looking at the torque curves, up to 2,000rpm the LS1 and LT1 are virtually identical. The L98 is only the width of the printed line lower than the other two engines.

At 2,000rpm the LT1 and L98 cross, and the L98 continues to climb while the LT1 torque curve actually lays over and starts to decrease slightly, until it levels out at 2,800rpm. At the same time, the LS1 curve is continuing to climb, and showing a greater torque than either the L98 or LT1. I would estimate the curve shows the LS1 is making about 25-30lb-ft more than the LT1 from 2,500-3,000rpm.

At 3,200rpm, the L98 lays over and torque drops rapidly. By 4,000rpm is is back down to maybe 220 lb-ft. The LS1 continues to maintain its significant torque edge over the LT1 all the way to redline. I'd say from 4,500 to 5,000rpm the LS1 is up by about 40 lb-ft.

Point is, the LS1 - at least the C5 version compared to the C4 LT1 - DOES NOT AT ANY POINT PRODUCE ANY LESS TORQUE THAN THE LT1. The idea that the LS1 has a "weak bottom end" would appear to be pure urban legend.... perhaps fueled by the feeling that the LS1 torque continues to build while the LT1 sort of peters out. The LS1's extremely strong top end makes it feel weaker on the bottom end, but the published data would appear to show that it isn't.