Fullblast

iTrader: (17)

I currently have a 99 Trans am with a 6 speed. I have a Fast intake and Fast Throttle body, Mac long tubes, straight pipes to borla exhaust.

I bought an Ls6 and Ecm out of an 02 Corvette. I'm swapping it out with the old Ls1.

Are there any things that need to be changed out? Will the Ls1 harness work with the Ls6 ecm?

I'm sure the oil pan must be changed.

My headers and intake should work fine over the ls6 intake and exhaust manifold, right?

I shouldn't have to get the Ls6 ecm flashed for these mods will I?

Any help is appreciated.

Fullblast

iTrader: (17)

Ok, these questions have been answered. I just want to know if the ls6 I'm getting Is the 2001 model with 385hp or the 2002 &up 405hp. Casting number is 12661168

How can I find out for sure?

Fullblast

iTrader: (17)

12561168

redbird555

iTrader: (14)

Couple things, how do you know this is an ls6? Corvettes all came with ls1 motors unless it was a z06. 1168 is an ls6 block casting number but it wont tell you the year, also LS1 motors commonly came with ls6 blocks so just having an ls6 block doesnt mean its actually an ls6.

You need to look at the heads, ls6 heads are casting 243. 241 heads are ls1. If that all checks out the only way to tell what year it is would be to take the cam timing gear off and look at the numbers stamped into the cam. or pull the heads and weigh the valves

Fullblast

iTrader: (17)

The engine has 243 heads and an ls6 intake. He said it came out of his vette, but did not specify the year or if it was a zo6

Fullblast

iTrader: (17)

He sent me a few pics of it. I can't figure out how to upload them. What is the best way to tell the difference between an ls6 intake and an ls1 intake?

redbird555

iTrader: (14)

well if it came from an 02 like the op says then it will be a 405hp ls6. 243 heads means it is an ls6 and coming from a vette it could only be a z06. if you can find a vin on the block you may be able to tell otherwise looking at the cam is the only way to tell

Darth_V8r

iTrader: (4)

I might be wrong on this, but I think the valley cover change happened in 02. If your PCV port is off the valley cover just under the intake to the passenger side pointing diagonally forward, I would think it's an 02. If your valley cover doesn't have that port, it's likely an 01.

Of course if I'm wrong someone will correct me.

Fullblast

iTrader: (17)

I thought it was an 02. I re-read the message and it did not specify the year, nor did he specify it being a zo6. I've been looking at so many, I got it confused. I'm going to message him today and ask specifically what year it is.

Has anyone ever heard of somebody putting 243 heads on an ls6 block, that has the ls1 cam, and calling it an Ls6 just to sell it? Or am I being paranoid? I just don't want to get ripped off again.

I read that some ls1's have the ls6 block and after 01, they used ls6 intake. I Just want to be positive it's got an ls6 cam.

redbird555

iTrader: (14)

01 had an ls6 style valley cover with the angled piece coming from it but the pcv was still external. If the guy left all the plumbing attached to the engine it could be identified that way but some early 02 motors still ahd the old style pcv. My old ls6 was a late 01-02 motor and had the ls6 valley but no pcv under it so I had to use an external pcv

redbird555

iTrader: (14)

I dont think someone would go through all that trouble to swap heads. verify it has 243 heads and that the casting is 1168 the only way to truthfully tell though is by looking at the cam

Fullblast

iTrader: (17)

Fullblast

iTrader: (17)

Fullblast

iTrader: (17)

Fullblast

iTrader: (17)

Ok, so it would be wise to put a new high pressure oil pump, and new timing chain set on.

I've looked at a few, but does anyone have recommendations on brand, or best place to buy them?

Will I need new gaskets where the header connects to manifold?


Would it be worth the extra cash to add an underdrive pulley as well?

Darth_V8r

iTrader: (4)

Cloyes 3220 timing set. Has the LS2 thicker chain, no clearance issues, and $35 at oreillys when I got it 5 months ago.

Yes, get new header gaskets. Exhaust leaks will really screw with your tune.

Don't worry about the UD pulley unless you're going all out. It's easy enough to go back in later and put one on.

Do get a ARP pulley bolt and don't reuse the stock bolt not even to get the pulley back on.

gsxrdan2

iTrader: (2)

I agree with a new oil pump and timing chain,Im thinking I would pull off the heads and do head and intake gaskets while its on the floor. You will also get a good look at the lifters and cam then also. Just some quick things for piece of mind before all that work.

joecar

And also, do not use the new bolt to pull the pulley on, either.

If it has the original lifters you may want to replace them anyway (with stock new ones).

And do the rocket trunnion/bearing upgrade.

Fullblast

iTrader: (17)

Ok, the guy got back to me and said it's a long block out of a 2004 Ctsv. Does this make more sense?

redbird555

iTrader: (14)

replied in your other thread....