I think you need to do a little reading:
http://www.idavette.net/hib/ls6/page3.htm

Also I don't think many people are going to put a roll cage into a C5 coupe!
:) :) :)

 

Hib's article is referring to the 01 comparisons. I was referring to late 01 and 02 with regard to the blocks being the same.

Also I still contend that the LS1 block is fine for durability for the power levels we are seeing now. To me the LS6 needed most of its strengtening update to overcome the window cutouts, which the LS1 doesnt have.

Also I said rollbar not rollcage. Plus there are removable options, at least in a ragtop.

:cheers:


[Modified by kewlbrz, 11:50 AM 6/10/2002]

 

I'm trying to understand about the block are you saying all Corvettes now have the LS6 block? Also pistons? Jounrnals and bearings? Or are you saying even Z06s have LS1 blocks?

If what you say is true about the windows then they wouldn't have bothered with all the other cahnges like pistions, bearing e.t.c.

Finally a rollbar is a real pain for everyday driving and may not even equal the rigidity of the Z06...

 

First I don't think anybody made a mistake buying a Z06 that was not my intent. I would have bought one if they were available, I just chose not to start over when I could pay less and go faster.

Second, I think that if you are defending your car because of what you think it is and what it actually is, then the rigidity is only in your brain. Go back and read how much the FRC "Hardtop" was in comparison to the coupe back in 1999. You might learn some thing factual. It was supposed to be lighter, stiffer, faster, and cheaper. But ended up being the same through the cones. So I guess it would come down to the driver. I made up for any rigidity issues in my car with T1 suspension. I think that solves it. And once again why are C5R's in Coupe config if there is such a structural difference. I say that a little loosely because the C5R chassis is completely different, but I have yet to see a Hardtop C5R.

All C5's to me are beautiful be it Coupe, FRC, or Vert. The question here was how to make a Coupe, Vert, FRC comparable to a Z06. With the exception of the M12 it is not that difficult.

The LS6 is an LS1 with some windows cut into the block to relieve crankcase pressure. Crankcase pressure causes a decrease in TQ. I don't think there is much of a difference to determine longevity out of that. The main difference in the LS6 is the heads and that is easily remedied.

 

I'm not going to take offense to your post and just put it down to lack of research... This will be my last post here but I suggest you do a little more reading...

 

I spoke to C4C5specialist and confirmed what I had understood, and he said he has torn down 01+ "LS1" engines and has seen the bay to bay windows and said the blocks are identical. Pistons are the same, crank is the same, rods are the same. Everything is identical except for heads, cam, and ti exhaust, high flow cats for 02, no maf screen for 02, and calibration. Only thing he is unsure of is when the exact cutover of using the same block took place.

so there you have it.

thanks Paul if you read this.
:cheers:

 

So that means an LS1 has the same compression ratio of 10.5 to 1 just like the LS6? :confused: :confused:


[Modified by Richin Chicago, 7:00 PM 6/10/2002]

 

No because the LS6 heads have a smaller chamber.

 

Then the displacement would be different??? :confused: :confused:

 

Displacement has never used combustion chamber size in the calculations.

Displacement only uses the cylindrical volume of the bore and stroke.

a simple method: Bore^2 * Stroke * #cylinders * .7854

Or your could do pi(r^2)h * #cylinders


[Modified by kewlbrz, 7:08 PM 6/10/2002]

 

You're right it is swept area....

 

That's easy..... Money.... :D

 

Money or ... a lot of technical skills ...

 

I don't think GM agrees with you... http://www.chevrolet.com/corvette/en...ls6_engine.htm

 

I think that you could look at that from different perspectives. Are they saying the changes are different from the existing production LS1 or are they simply referring to changes they made from previous LS1's, and are just not marketing the fact that the current LS1 shares much of the same components. GM is notorious for not marketing many changes. For example, in 99 there were a ton of changes made to the LS1, they were not marketed. This is also why we see 99-00 LS1's consistantly out dynoing 97--98 LS1's stock for stock. There are not two seperate part numbers for the existing blocks. Based on hands on experience from folks like c4c5specialist where they have physically dissasmbled the motors and see that the blocks and other parts are exactly the same is enough proof for me. I'll take that over GM marketing mumbo jumbo anyday.

Also I wanted to add, here is a GM press release regarding the exhaust manifolds:

"Engineering development of the Z06 package resulted in several improvements for coupe and convertible models as well. LS1 engines get the same new intake and exhaust manifolds as the LS6"

This shows more of the contradiction and confusion spewing from GM marketing when comparing to thier statement that the LS6 has cast manifolds different from the LS1 stamped steel. Again, I beleive they are simply referring to 97-00 LS1's, and just arnt marketing the fact that since late 2001 that all motors short block assemblies are bascially identical except for cam. They would definatly take away from the marketing hype of the LS6/Z06, and they dont want to do that.




[Modified by kewlbrz, 1:27 PM 6/15/2002]

 

The top is where it's at for people making most of these decisions.

You can mod a C-5 to '01 Z06 HP specs pretty easily (02 is a great deal tougher) for under $2500 in exhaust and intake-but will be at the absolute limit before heads and cam.

You can tire it and weight redux (I believe my FLP complete system and Z06 cat back muffs should save me close to 50 lbs), and non-runflat tires save a couple of more pounds per tire. You should be able to come w/i 60lbs of a Z06.

Ultimately you will probably get to 90-95% of an '02's total performance. But ask yourself where and when you will achieve this advantage, as oppossed to the removable top, greater storage area-and top speed.

I lamented, and chose the coupe-but wish I had the LS6 under the hood-but trying so damn hard to close the gap with mods!!

 

http://www.c5registry.com/2k2z06/index.htm

Has some really good info about the 2002 Z06 and what has changed.

 

Back to the original question C5 to Z06 performance. You can mod your regular non-C5 quite easily. For $2500 you get a H&C setup and be ahead of the 02 Z06 in the engine dept. The only thing you would not have is the windows down in the crank case for better crank case ventilation. The M12 is the big hurdle. I would not worry about some Ti. exhaust system, a lot of people sell those on ebay and in parts. I would not even put it on my car, when there are better aftermarket systems out there. The MAF is last years Maf (85mm Delphi) with the screen removed, air box lid is cut out (get a new one)...no problem there. The suspension can be bettered with a variety of parts. Dude don't let people defending there cars because of what GM puts on a website fool you. The Z06 is not that hard to surpass in the aftermarket world...so far the fastest ones are all coupes. Just look at those 1/4 times, and if its track look at the configuration of the C5R's. The C5R effort really benefits from the low coefficient drag of the Coupe style...