have a 99 ta and saw the ls6 conversion kit in summit, wondering if anyone has bought it and installed it. If so does it really give you 405 hp.

 

Ls6 in 01 firebird from GM though

 

Is this a Heads, Manifold, Cam & Springs kit? I believe those are the primary differences between the LS1 and LS6 performance wise.

Pat

 

Yeah that's not really a "conversion" in terms of what this particular forum is about. In this section, we talk about converting CARS with LS1/2/6/7/etc. motors.. ie. www.ls1mustang.com

That's a basic heads/cam package, and honestly there's a LOT more power to be made with other packages

 

As noted above, this should likely be in the Engines section of the forum but this might be enough answer to quell further inquiries.

From "How to Build High-Performance Chevy LS1/LS6 V-8s", by Will Handzel

The LS6 first came out in 2001, only in the Z06 Vette, and made 385 hp & torque. From '02 - '04 (all my book shows) it was 405 hp / 400 ft/lb torque, again only in the Z06 - pages 40 & 41.

"The high-output LS6 features cylinder heads with higher-flowing ports and chambers compared to the base LS1, but aren't the only reason for the increased power output. A more aggressive camshaft, freer breathing airbox and mass airflow sensor (MAF), heightened valve train components, and various other pieces took advantage of the improved ports and more efficient combustion chamber for higher RPM and more power production throughout the powerband. The reason this needs to be explained is so you don't bolt on a set of LS6 cylinder heads and wonder why you didn't get a huge leap in performance! Better flowing cylinder heads require all those additions and possibly a freer flowing exhaust to take advantage of the increased flow capabilities. The heads are the core part of the success with the Gen III V-8, but you'll need to enable them to make the power potential they contain." page 29.

The LS6 is a redesign of the LS1, not just a slight modification, and includes several advantages in the block that don't make horsepower but ensure that the LS6 can survive HP levels that will stress an LS1. The book quoted above is a great reference and is ISBN 1-884089-84-4.

Take care,
Mike R.
Hot Las Vegas

 

Now forgive me for being ignorant at this point, but isnt the ls1 a 5.7L engine and the ls6 a 6.0L engine?

 

That's a negative the LS1 and LS6 are both 5.7L. The LS2 is a 6.0L.

 

I think an earlier engine named the same might have been a 6.0L, but the new engine is a 5.7L. Same displacment as the LS1 but a different block, heads, intake, cam.

 

Ah, ok. thanks! Ive been told in my other thread to get a aluminum headed lq9 engine. Any info on this? i was told its 6.0 iron block at about 9.3-1 compression. sounds perfect for my app as im not overly concerned with an extra 100 lbs on the front end. the v6 is all iron now so more than likely the iron block with aluminum heads probably wouldnt way all that much more than whats in there now.

 

According to my book, it looks like the LQ9 was brought out in '02. 6.0L, 345 hp/380 ft/lb. Iron block with 72 cc aluminum heads. Weighs about 520 lbs fully dressed.

Also, I made a mistake above - the LS6 was in the Z06 Vette, but also in the '04 Cadillac CTS-V in 400 hp trim.

 

if you are converting from an ls1 to an ls6 dont bother...if you have to yank heads and swap cams, go with something more oomphy. only way this is a good deal if you can get the parts uber cheap. the only real difference is the ls6 combo will pull a little harder at high rpms, when the ls1 combo starts falling off. I know of two people who did this swap and ended up not being happy and went to mroe aggressive parts. the heads are ok...but the cam is still very docile.

 

How old are you talking? The only other "LS6" GM motor I know of is the 454 from the late 60's - early 70's, specifically the one found in the 1970-71 or 72 SS 454 Chevelle

Not to say there couldn't be others, just that is the only other LS6 I know of......

 

That might be one I'm thinking of. I've been playing with Mercedes now for over twenty years and haven't paid much attention to the muscle car scene. I knew there was another LS6 somewhere, but the book I have is about LS1/LS6 and that only verified the "new" LS6 was a 5.7L motor.

Nothing like jumping back in on the deep end. There are quite a few fellow Benz fanatics that are REAL interested in my LS6 journey. Do you think I can attend Corvette rallies once the LS6 is installed into my Benz? :-)

I already know the Benz folks are going "eeuuuuw, what a travesty" but too bad for them. It's going to be fun to see which ones have enough oomph to pass my '87 SEC. Won't be many. I'm expecting an increase in mpg also.

 

AWESOME dude, keep us posted. My ex worked for Beverly Hills MBZ for many years so I know alllllll about that "snooty" 'tude those fuggers have. Show em what a real motor is all about.

 

I just put that exact kit on a 00 SS this weekend actually A friend of mine who is an older gentleman wanted more power and i actually suggested the kit. Its kinda pricey, but the car made great power, great torque, and most of all we never tuned it and it drives like a COMPLETELY STOCK car. No issues whatsoever. If you can get lucky and get one for bout 1800.00 like he did i would suggest it. You CAN make more power with aftermarket parts, but this package includes everything and makes great power with no issues at all.

 

My car had a chrome emblem on the back that was "560SEC", denoting the 5.6L engine and the SEC body style. I'm having a decal made that is "570SEC" with a smaller "LS6" under the 570. I'm beginning to think that instead of "LS6", it should state "Pushrod LS6", just to abuse the purists.