LS3 Envy?

A good researcher, with a hypothesis, gathers the data and lets the chips fall where they may.
Poor research, goes in with a preconceived theory, and selectively uses the data to fit that theory, so as to confirm an already decided upon result.
You have conteded that the LS3 only makes about 20-25hp more than the LS3 thus making the LS2 come in at 411hp. The next step from there was merely "lining the ducks up" to bolster this position.
If one of the ducks could not be gotten in line, then it was discarded.
Schindler had his LS3 Corvette tested on a chassis dynamometer by MTI in Houston, Texas. The best dyno run resulted in SAE corrected numbers of 390.5 horsepower and 380.5-lb.ft. of torque. Jim asked what a stock LS2 rates on MTIs chassis dyno. MTI pulled a typical stock LS2 dyno sheet showing 353.7 horsepower and 354.3-lb.ft. torque. The difference between Schindler’s LS3 and the LS2 was 36.8 horsepower and 26.2-lb.ft. torque. That is a nearly perfect match for Chevy’s rating for both engines. Chevrolet numbers show the LS3 with NPP exhaust has a 36 horsepower and 28-lb.ft. torque advantage over the 400 horsepower and 400-lb.ft. torque rated LS2.
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Here is an overlay of my LS3 against a LS2 that was run on the same dyno as mine. Jayson (owner of MTI in Houston) ran both dyno runs and told me the LS2 is typical of what LS2's dynod at....

The LS3 is making significantly more horespower and torque from around 4000 RPM on in. You simply cannot argue with that. You can throw up "forged wheels" and "less driveline loss for the '08" as a reason for this marked and demonstrated difference, but its just straw grasping. Thats all it is.
One cannot help but wonder, had Schindler's dyno overlay shown just a 20 rwhp difference between the LS2 and the LS3, which would have fit your "agenda", if you would have gone off on this expedition.
The data came down against you. It poked a gaping hole into your theory which you have advanced since just before the LS3 hit the streets.
No, that duck, the chassis dyno, had to be dismissed. So you posted up another thread indicating that the LS2 based Corvette, was at a disadvantage to the LS3 on a Chassis dyno.

Then you kept "spinning numbers" until you could "support" this 411hp position with this thesis. Its volumous and for the most part well written, but thats all it is.
It appears to me and perhaps others, that you "creamed" numbers from Tommy's quarter mile list in order to support your position. The first two results for the LS3 had to be eliminated, again, because they would affect the other LS3 numbers when averaged, and go against the preconceived "LS2 makes 411hp" agenda.
The writeup will impress people who are overwhelmed by its sheer volume, and references to other threads which indicate "research", but those who take the time to critically read it, and have read scientific literature in the past, will likely take a different view of it.
For whatever reason, I don't know, the reason, but it seems that for whatever reason, you seem to be on this mission to at least imply, if not outright "prove" that the LS2 either "makes or "would make 411 hp under the latest SAE J1349 procedure.
Sometimes its painful to watch. I mean, in some cases, you are reaching so hard, that as mentioned above, you are saying that the LS3 based Corette has an advantage on a dynamometer over an LS2 based Vette and that this played a role in the 36.8hp difference shown from Schinlders observation of the dynograph overlays.
No, the 36.8 rwhp difference he put up there, between his car and the typical LS2 dynoed at the same shop, with the same operator, was simply inconsistent with your hypothesis. It was going to go against the 411hp theory. So it had to be "impeached".
Furthermore, you don't know what wheels were on the LS2s which made up the average number that Shindler's car was compared against. Some, of them may even have had aftermarket forged wheels themselves.
Finally, if what you say is true, then why don't T56 transmissioned '06 and '07 Z06s dyno significantly less than their '08 and '09 siblings with TR6060 transmissions in them?
As will I my friend. As will I.
Last edited by '06 Quicksilver Z06; Jul 18, 2009 at 02:24 PM.

Back to the post!The 08 had a lot of changes not just the Ls-3!
Thats why i'm going to put on the nos
The Best of Corvette for Corvette Enthusiasts
(This is probably whey we see a mininal jump in performance when we compare an apples to apples configuration of an LS2 and LS3)
The general conclusion from the theory was that GM did not document the LS2 at 410 HP, so that they would not upset all the 2003-2004
Z06 owners with 405 HP, who thought when they bought their car they'd have the most powerful Corvette for more than a year or so.

Looks to me that it's self explanatory from the above X Files, conspiracy theory, horse crap, just who the bonehead is.
and if your talking speed, Its 30 hp guys,, and both are vettes..... have a break and stop hating your cars whether its an ls2 or an ls3. Have pride in what you drive and if its speed that concerns you, bro send me a PM and I will give you a link for a website that sells cams.
I was fortunate to be able to pay cash for it in 05. I would be a fool to sell it, take a $$$ hit for virtually the same car which is identical in looks for only 30 more horsepower...(although some here have said "it's a completely different car" which it is not)... What's even more ridiculous is that some will go out, trade in their very low mileage garage queen pre 08's, for one with 30 more HP and make it their new low mileage garage queen
Last edited by Jimbeaux; May 1, 2010 at 01:04 AM.

Question?
I have an 09 Cpe with an LS3.
Is this a new motor, or is This the same motor and HP rating that the ZO6 had a few years back?





Long tube headers, and it gets louder, hotter inside, and it may not pass emissions.
Cold air intakes, be they front breathers or back breathers are still bottom breathers, and make you more susceptable to hydrolock.
Tunes...well you don't know what you're getting.
Get more radical than that, like going into your engine to do cams and such, and you do so at a bit more risk.
Just about any mod for power you do is liable to cost you at least a little, in drivability and/or dependability.
And finally, any "simple bolt on" mod that you can do on an LS2, can be done by an owner of an LS3 and it will respond just as good, if not better. ....So at the end of the day, you will still wind up right where you started if you are comparing "like to like".
Trade up. Anything less than trading up is a bandaid.
Great postTo the OP: I traded up from an LS1 to an LS3. That is a definite SOTP difference to be sure
That said, it wasn't about the HP or the speed for me. I enjoyed my '04 Vette as much as I enjoy my '09 now. When I was posting in C5 General, many folks trying to "keep up with the Jones'" over there and use the increased HP of the LS2 and now the LS3, LS7 and LS9 as a "benchmark" to strive for which IMHO is nothing more than $$$$$ being spent to enhance bragging rights.Same thing with C5 guys wanting HIDs or push-button starting. I'll say the same thing here I said there: if you want those features or want that level of HP, its much easier (and cheaper) to just upgrade
30hp (36 with NPP) is almost a 10% increase, power that is OEM. It won't be felt as much in a Vette compared to a Camry but it will be felt. Just like I know almost 70hp jump to the Z06 and definitely the 200+ to a ZR1 would be felt for me. In the end I wouldn't want to own either of those cars due to a bad left hip. Every person has a point when enough is enough, it all depends on cash available, willingness to spend that cash, physical limitations, personal preferences, etc.





30hp (36 with NPP) is almost a 10% increase, power that is OEM. It won't be felt as much in a Vette compared to a Camry but it will be felt. Just like I know almost 70hp jump to the Z06 and definitely the 200+ to a ZR1 would be felt for me. In the end I wouldn't want to own either of those cars due to a bad left hip. Every person has a point when enough is enough, it all depends on cash available, willingness to spend that cash, physical limitations, personal preferences, etc.
















