ummm no, 98-00 cars got EGR 01-02 didnt

 

Yeah, maybe that's it. What can I say, it's late, I'm tired. I know I had to remove it on mine ('00).

 

i ditched mine as well along with the rest of the pcv **** and emissions

 

OEM HP & TQ Ratings Yes they are under rated!

OEM Cam Specs 1997 - 2003 LS1 engines + 2001 - 2003 LS6

Differences Between Years 1998 - 2002 LS1 F-Body specs

Specific 2001 & 2002 Changes

I was not able to find a link that explained the use of the LS6 Manifold in all 2001+ LS1's, but suffice it to say that since no EGR was required with the new LQ4 cam, then one manifold for both applications was primarily to ease assembly and reduce piece cost.

 

^ damn the f-body did out power the vette. I'm surprised at that. I never would have thought. Could just be one case but they are very close there's no arguing that.

 

I would figure the IRS of the Vette is where the small power loss may have came from. That and as already been said, every car is different.

 

Well me and my dad are gonna have to line em up. we just need to get the cars out of the garage. Weather still colder than a witch's tit here in Colorado. 32 degrees is the high lately and its supposed to snow more tonight. Hes got an 02 vette and ive got my 02 T/a ws6. We both have the 3.42 gearing and 6 speed. Both totally stock (mine not for too long). Would be interesting to see. But I know I can outshift that old guy. LOL!

 

Well it would be a good race to see , but it wouldn't solve anything as far as which car has more power. There are too many variables just lining the cars up to race them. Which car weighs more? Which car gets the better launch off the line? Which car stays in the groove of the track better? Which driver is a better racer? The only way to know for sure without having any variables would be to pull your engine and your dad's engine and hook them up to an engine dyno (so that there are no variables in drivetrains and varying amounts of power lost getting to the rear wheels).

 

Point taken! This forum is the BEST! Thanks for the info guys

 

Still run that race though! Would be a great one to watch!

 

Total bulls*** too. 345 my ***. Maybe w/ longtubes, intake, TB and intake mani. My C5 put down 305whp and 310wtq. That was COMPLETELY stock on a wet and humid day. No way in hell it could reach 345whp, even w/ a great tune. Those are factory freaks, so don't kid yourself about numbers. Just take the advertised HP and drop 15% for manuals and about 18-20% for auto's. There's your educated guess...

 

Glad to see there is another voice of reason here.

 

But watch out cause he's probably a smarter racer. And he is probably better at modulating and double clutching.

Plus he's a few hundred lbs lighter so be ready to lose after about 75mph.

 

What? Where did you get this information from? It's all wrong.

Corvettes and F-body's have the SAME exact LS1 with the SAME exact camshaft and the SAME exact horsepower rating. The only differences in the two will be the intake and exhaust, which is a +/-5 horsepower differential at best.

Nothing you said is even remotely true. The F-body's were rated much lower than Corvettes for 2 big, well-known reasons:

1.) They didn't want to **** off Corvette fans. How could GM justify spending $20,000 more for a Corvette when they can get an F-body with the same horsepower and the same driveline for $20,000 less? Corvette owners have to be the top dog, so to satisfy them, they made it seem like the Corvette was a much more powerful car, when in fact, it wasn't.

2.) Insurance purposes. Corvettes are a touring car, F-body's are a sports car. F-body's cost more money to insure, so the horsepower rating was cut.

Same engine, same horsepower.
You're probably confusing the LS6 camshafts and the 98-00 and 01-02 camshafts. The camshafts were revised in 01-02 to cut emissions, and the LS6, which is essentially an incredibly mild H/C LS1, has slightly larger specs and came in ZO6 C5's.
Other way around. 01-02 cars LOST EGR because the camshaft was revised. The 01-02 LS1's were given a truck camshaft that reduced emissions enough that the cars could pass emissions testing without the EGR system.

You're spewing a lot of very wrong info here, man Not trying to be mean, but damn.

Corvettes dynoed lower than F-body's because the IRS in the Corvette ate up a little rwhp.

 

98-00 has egr 01-02 doesn't

01-02 have smaller cam / ls6 intake and the 99-00 have ls1 intake but a bigger cam

01-02 have 241 heads also 98-02 have bigger injectors and the shitty heads, there are several thing that are different about the year models

also just about every year they improved the oiling of the blocks

but all the engine still made about 350

but the vettes got much better cams and heads so most made about 375hp

 

The book I have indicates that for 1998-2000 the f-body cam had .500 lift, 209(e)/198(i) duration, 119.5 LSA, 117/122 timing vs the Vette for 1998-99 with .479(e)/.472(i) lift, 207(e)/199(i) duration, 117 LSA, 113/117 timing - they are different.

The 2000 Vette got .500 lift, 209(e)/198(i) duration, 115.5 LSA, 112/119 timing - that's different.

For 2001-02, the F-body and Vette got the same cam, .479(e)/.467(i) lift, 207(e)/196(i) duration, 116 LSA, 117/115 timing.

That's all exclusive of the LS6/Z06.

01-02 Vette & F-body all got the Ls6 intake.

So, prior to 2001, the F-body and Vette did have different cams, but for 2001-02 the Ls1's engines were identical. Based on a book I have -Chevy LS1/LS6 Performance, Endres, 1st ed. 2003.

 

Not all of it. I did admit above I had the EGR years backwards above. It was late.

No, they didn't. Call your local GM parts counter and ask for the part numbers. They're different.

This I agree with, but more toward when they built the '04 GTO compared to the Corvette.

Nope. Look up the part numbers at your local GM parts counter for the OEM's for each car and each year.

Yes, I ADMITTED above that I had it backward. Let's move on since we agree that what I said above (originally) about the EGR's was WRONG.

Not all of it was wrong.

This I agree with as well.

 

Looks like everyone was right, pending what year models you were comparing.

 

Hmm, I guess I'm wrong about the pre '01 LS1's. I've never heard anyone mention cam differences, EVER, and there's been dozens of F-body vs. Corvette LS1 threads in the past. My apologies. The horsepower ratings were still unaffected, though, as the F-body's on average dynoed considerably higher than the Corvettes due to the IRS vs. solid rear axle, so it really is a moot point when you think about it.

The simple fact remains, the horsepower differences were negligible in all Corvette vs. F-body LS1's and nonexistent in the '01-'02's.

 

i would say that could easily be true. my 02' z28 put 325hp at the wheels when it was still completely stock.

p.s. for all the guys out their that say that ls1 Corvettes have more hp than ls1 f-bodys you are WRONG! thats just something gm said to make people feel better about spending a lot more cash for the same motor. i am not saying corvettes are bad, i am saying people who buy a vette are paying for the name and a better handling suspension. thats it