According to one of my more reliable sources, the forthcoming CTSv will NOT get the LS6. It will instead debut the LS1 Gen IV. This particular application will displace around 5.3L, will be all aluminum, and will make good use of VVT.

Sounds exciting, and should be a good indicator of the characteristics of the C6 powerplant. Not to count many other future Chevrolets.

 

I kinda suspected that with the secrecy around the powerplant of it. I thought it would be stupid for a 2004 CTSv to have the GenIII powerplant if in 2005, the GenIV line takes over. A single year for an engine seems odd. Now if this is true, this makes me wonder what will be going in the 2004 GTO, the GenIII or the GenIV.

 

Yeah, i was thinking that putting the LS1 in there was kind of odd too. It doesn't really fit the whole high-end image because of the LS1 being "old tech" even though the engine is great. But about using that engine for just one year................they did the same thing with the current CTS motor. This year it is the 3.2, next will be the all new 3.6.

 

Makes Sense...

I assume they are still referring to the Gen IV as LS2?

I had once heard LZ1 also...

 

Didn't someone post a story here some time ago that the 5.7 displacement was history? I recall that story stating the 5.3 was destined for cars & as the base V8 for trucks, while the 6.0 was going to Corvette & trucks.

 

It will be called LS2 (reported in camless C6 Story)...the GTO will get it in 05 I think. I already tried to register ls2.com and it was taken Anyways..5.3L was tossed around in my articles as far back as last year. Everything changes at GM real quick now (280hp Grand Prix anyone?) and I wouldnt accept anything as fact....Thats why I have a rumor mill on my sites

 

According to the same source, the C6 will probably debut a 6.3L.

Why you ask? Because 6.3L is the max displacement of the LS1 small block, and since the Gen IV is more an evolution of the Gen III this tolerance will not change

 

384 cubic inches, more or less?!

 

384 cubes as the limit? I guess if you mean for an all-bore increase, 384 is the limit. Amazing what happens when you stroke it though. But then go ask MTI, they made Nineball on ls1tech.com a 434 out of an LS1. With a C5-R iron block I've heard of numbers going to 454 cubes! I've never seen one in person or in pics alone, but I hear it is possible.
But the all bore 384 makes the most sense because it would allow the engine to become a higher revving engine with the bore, instead of the stroke. And being that the camless C6 engine and a high tech LS2 CTSv engine are in the works, high rev in todays market means high performance. The all bore would be the easiest way to make a high reving, large displacement LSx engine. Just make sure the cam aspects are correct, the heads flow enough, and that the parts can take it.
07 camless Corvette Z06 with a 6.3L inside revving to 8,000 rpms producing 550hp??? Zoom!!!

 

Still a big mystery about this Gen IV. I still think they are getting a LS1.

Either way, I bet GM did their homework so giong from a Gen III to IV wouldn't be too too painful..

 

sorry, i don't buy it.

I know they are using the LS1 to start, period.
I happened to be at the right place/right time to hear a conversation regarding what the engine was going to be called.

I wish i could elaborate, but i know a few people who would skin me...

 

I don't want to get Mervs "skinned", but could it be that the CTSv will have the new LS2???

 

LS2 again? Has GM run out of alphanumeric codes for their systems? First they revive the LS6, then the LT1, now the LS2!?

 

Just thought I'd mention this. Unless there is already an aftermarket exhaust system for CTS (possible, but I haven't heard of one yet), a CTS zipped by me yesterday while I was waiting to turn at a stoplight over on Rosecrans (for those of you living in the area) that had twin mufflers and single chrome tail pipes attached to each on, with what looked like factory quality bumper cutouts for each pipe.

It didn't rumble or anything, yet it looked pretty serious as it passes. I'm not saying that it was a CTSv, but being that it looked factory, and San Diego along with LA's 405 corridor seems to have become the industry's playground of late, I'm not doubting that's what it was.

No, I didn't see the front, and no it didn't have California (or Michigan as I could tell) plates on it.

 

The engine all you guys know as the LQ9 was the Iron Duke back in the early 80s. It's not the first time they're repeating codes. As to why, I have no idea.