stock for stock would NOT include an Fbody with and ls6 swap though.

 

And lets face it. You're going to have a tough time beating a 380rwhp bone-stock Cobra with a 340-350rwhp LS6-swapped F-body, anyway.

Mike

 

my friend had like a 1998 cobra with 4.10s, x, pipe, and other mods, it only ran like a low 13

 

That was a NA DOHC cobra. It puts out less hp than the LS1 does.

The '03/'04s run much better than that.

 

We're talking about 03-04 Cobras.

If you want to talk about 96-98 Cobras, my friend had a 98 that went 11.20s @ 123+ on bolt-ons + a 150 shot.

Mike

 

But do you honestly think that if someone was going to go through the trouble of doing an LS6 swap, they'd leave everything else LS1 stock? I have headers, intake, throttle body, lid, cat-back exhaust, (pretty much all the basic bolt-ons) as well as several other mods along with my LS6 longblock. I STILL need to get a dynotune, but in all reality, I expect to put down between 360 - 380 rwhp...and that's naturally aspirated compared to a blown Cobra. If you want to compare apples to apples, I need to strap on a blower like the Cobra IMO.

I hear it all the time that an LS6 is over-priced for what it is, but look at the facts.

I had a knocking LS1 that needed to be rebuilt. A STOCK rebuild was going to be $3K. I knew I at least wanted to do heads/cam while I was at it, so you can add $2500 to the rebuild for that. You're now at $5500. I did the research and discovered that most of the sponsors only warranty the motor if they actually install it, OR, if they don't install it, then you have to either get the car to them or remove the motor and ship it back in order for them to do the warranty work. With install, it was going to be a $10K project in order to get a warranty as well, if I went with one of the sponsors and their "built" motors.

I picked up a BRAND NEW GM Performance Parts LS6 Longblock w/Camaro oil pan included in the box for $5200 shipped. I sold the new Corvette oil pan and pulley that came installed on the motor for $350 which brings the total price of a new 405 HP GM crate motor to $4850. I'm fairly confident I could get at least $850 for my LS1 long-block in it's present condition if I decided to sell it, so that would bring my cost down to $4000 for a new motor with a 12 month/12K mile warranty from GM no matter who installs it. Warranty work is as close as my local GM dealer. If I could find a NEW motor with 405 HP for $4000 from one of our sponsors, or even if they could have rebuilt my LS1 for that amount with that HP, I would have gone with them, but no one would even come close.

I have a friend that has a shop and we did the swap together...one of the best learning experiences of my life and he only charged me $500 for the swap. The deal was I had to do 1/2 the work and he'd only charge me 1/2 price. I wanted to get in there and do anyway, so that was a perfect deal for me!

Some people don't understand why I made a big deal out of warranty work, but at the time, my wife was 6 months pregnant and she was gracious enough to let me spend that kind of money with the understanding "Just do what you want, and do it right, because you're not going to be able to do this again!" I agreed and I felt I needed a warranty to ensure my purchase wouldn't go bad. If I had blown a "built" motor in the 1st 6 months, I'd have a dead F-Body in my garage right now.

Now by the time it was said and done, at the same time I did the swap, I also did intake, cat-back, new LS6 clutch, and chrome ZO6 rims, I ended up spending quite a bit more than I had originally planned, but I'm VERY happy with the results.

 

i hear what your saying...

but in the context of the discussion:

"Anything with bolt-ons will have a field day. I'm talking stock to stock heads up race"

an Fbody with an LS6 swap AND all the bolt ons...isn't exactly fair.

 

the initial question was about putting in an LS7. There is nothing you can do to an ls1 to make it comparable to an LS7. Yes you can barely make it go faster (NA) than a bone stock LS7, but its like the lt1 guys saying you can buy a cheap lt1 and mod it to go faster than ls1s.

With the LS7, youre paying for a LOT more than 505 streetable horsepower / 475lbft torque. At $15K brand new, its a good deal for the motor you get.

http://www.corvettemuseum.com/specs/2006/index.shtml

 

Might not be fair, but it would be pretty damn cool.

 

hey BANDDIRECTOR, where'd you get the LS6? straight from GM?
I guess it would be cheaper for me to buy an LS1 then mod it to an LS6 huh?

 

Here's a built shortblock from Speed Inc:

SPORTSMAN SHORT BLOCK INCLUDES:
-Polished& refinished factory LS1 crankshaft
-Billet 6.125” connecting rods
-Diamond Flat top Piston w/2cc reliefs or -8.6cc Boost pistons
-Diamond Pro-select rings
-High performance bearings
-All Gaskets, seals and hardware for short block
-Fully balanced/blueprinted/Finish hone w/torque plate, assembled


$2,799.99

 

Plenty of 2001+ F-bodies and Y-bodies come with the LS6 block and intake manifold. The only difference after that is the slightly better heads and very slightly larger camshaft. You can buy a set of $500 LS6 heads that people practically give away when they upgrade to Dart or AFR heads and a factory LS6 cam for a couple hundred bucks.

Your best bet is to skip all of the LS6 hype, toss a cam in an LS1 and put down 400+ rwhp and layeth the smack down.
If that's not enough, you could always throw on a set of aftermarket or ported heads and be at 450+.

Mike

 

Actually the only real differences between the LS7 and a 427-stroker LS2 would be that the LS7 comes with ****ty hypereutectic pistons and the LS2 stroker motor comes with forged pistons (assuming you built it that way), the LS7 has titanium connecting rods (who cares when you can use forged or billet?), a dry-sump oiling system (are you going to do a horrid amount of road-racing?) and of course the 12-degree heads on the LS7, which are goddamned awesome IMO, but you can buy LSx-based 12-degree heads from ET Performance or Warhawk.

With all that in mind, is the LS7 actually worth an additional $5000? Maybe you would think so, but I don't.

 

Oooooooooh Looky what we have here:

A forged 402ci LS2 for $3949.95 from Speed Inc.

ZL-402 LS2
INCLUDES:
-Built entirely from brand-new parts.
-Sold outright—no cores required!
-GM LS2 aluminum 6.0-liter block (includes block plugs)
-4.000" Eagle 4340 forged steel crankshaft, balanced to rotating assembly
-4.000" Ross 2618 forged alloy pistons with -6.00cc dish (includes new rings and full-float pins)
-402-CID displacement
-Eagle 6.125" H-beam rods
-Includes new, factory-installed cam bearings; Clevite rod and main bearings.
-Comes with all required LS1 retrofit hardware
-11:1 compression ratio (nominal; ultimate compression ratio will depend upon heads and gaskets used)
-Designed for naturally aspirated applications.
-Capable of supporting over 600 hp.
-Meticulously assembled to OEM tolerances and specifications.
-Oil pump, camshaft, pans, and plates not included.

Not compatible with pre-2005 GM knock sensors!
$3,949.95

 

The hypereutectic pistons are better for NA applications as they are lighter and get the job done. Obviously you'd want forged for FI or nitrious. And LS7 has more mod potential.

It's be worth the extra $5k if i had a fat wallet... otherwise no