cartwheel

What would I have to change to swap a LS2 to a LS3 480 HP crate motor GM PN 19244549 in my 2007 Corvette. Will my ECU work or will it have to be changed? Wiring harness? What about clutch and exhaust? Thank you in advance.

taken19

Shoot me a PM with your contact info as I am in the middle of a LS2 to LS3 swap. Hopefully I can save you some research and effort.

099blancoss

Why swap a whole crate motor in? Why not rebuild what you have and save some money?

timd38

I put an LS3 top on an LS2. If you use and LS2 MAF it is simple, if you use a LS3 MAF, you need an adapter from Casper.

taken19

Here's some info in an email I got from Anthony at LG motorsports...

"Ok so yeah there would be a few things,

1 crank wheel is different
2 cam pick up is different on that car so you would have to change the cam gear on the engine
3 I believe you have to change the MAP harness
4. You’ll have to re-wire if you want to use the LS3 MAF, or you can retain the stock one
5. Move the battery
6 install the tank and mounts…have to drill and use a nutzert in the frame for one or two of the mounts
7 oil cooler

Program the PCM…

Other than that…direct drop in mounts are the same, TB is the same, and I believe almost all of the accessories are the same. The water pump is different on that car so you would need a different upper and lower radiator hose but the rest should be the same."

This is a pretty good starting point.
Sean

05C6GAC

When they did mine they used an addapter form lingenphelter to go from the analog to digital or what ever is going on diferent!!! One thing you'll notice is the difference in the idle with the cam, not rally corvette friendly, but I sure do get noticed with the lope at a stop light.

cartwheel

From what I can find out my 07 LS2 should have the 58x Crank Reluctor wheel already. And the single bolt 4X cam gear reluctor. Same as the LS3/480HP crate motor right?

taken19 what year is the LS2 you are swapping from?

I'm going to check into the LS3 MAF adapter from Casper. I'm assuming it is a pin type adapter for the LS3 MAF unit. I need to check into the LS376/480 controller kit 19201327. GM also list for individual controller use pn 19201790. Not sure if either one of these is a stand alone unit or what? Or if I even need the controller unit with my 07 Corvette?

taken19

I'm going from a 24 tooth reluctor to a 58 tooth, so it will require the conversion box from Lingefelter (I have a 2005 LS2). I hear they work with no issue.

jimmyb496

I'm also in the process of an LS3 swap into my 2006 Z51. The cam p/u and crank p/u was the same. Everysingle piece from my LS2 car worked fine with the LS3 engine. Obviously I had to use an LS3 intake to mate to the heads. The issue here was the hole for the MAP sensor on the LS3 is bigger than the MAP hole on the LS2 intake. It didn't matter for my build because I used an LS9 3bar MAP sensor which, like the LS3 MAP, was the correct hole size. This MAP sensor will require calibration in the ECM big that's no biggie. The trick is the electical connection to my LS2 wire harness won't connect. You can either re-wire it, or I used Katech's adaptor harness. http://store.katechengines.com/map-a...bosch-p67.aspx

I used my LS2 throttle body which bolted to the GM LS3 intake without issue. I used all of the LS2 accessories accept an LS3 water pump (I think the LS2 and LS3 use the same water pump GM pn). My GM parts guy was a hugh help. He verified the CAM sensor, harness, and even the harness bracket were the same between 2006 LS2 and 2008 LS3.

The 2006 Z51 Oil Cooler lines bolted right up.

I believe the LS3 and LS2 injectors are different heights so there may be some consideration needed for which fuel rail or injector to run. I am using aftermarket Aeromotive rails and ID1000 injectors, so I had some slight customizations to do so it was a concern for my build.

If you have any questions about my build, let me know.

jimmyb496

Here's the link where I've been trying to document some of my build.

http://forums.corvetteforum.com/c6-c...otor-done.html

07zr1clone

Can I get an update on how this went? I've been looking at getting this stroked out 427 LS3 from JEGS with LS3 heads and a FAST LS3 intake manifold in my 07 C6. Any info would be appreciated!

http://www.jegs.com/i/Blueprint+Engi...S4270/10002/-1

Cherokee Nation

My 08 has a LS2 Tb (Sliver Blade) & a LS2 water pump, carry over from the 2007...

Vito.A

Like timd and others have done, the inexpensive way to upgrade an LS2 (or LS1) is to add LS3 cylinder heads, intake manifold, and intake rockers. Scoggin Dickey lists complete LS3 cylinder heads for $499 and intake rocker arms for $11.75 each. For $1100 you can have a brand new set of heads and intake rockers. Pick up a used LS3 intake manifold and then add gaskets. You can recoup some of your money by selling your LS2 head and intake.


If you add a cam and headers, this is a great package for any 05-07 Corvette.

Alain Mederos

Did you end up doing swap if you did what did you need I'm doing this too

Alain Mederos

Do you think you can help I have a ls2 c6 z51 as well but I have a full ls3 swap cammed made 509 and 453 laying here I wanna swap into the 2007 was it hard what's needed for swap any help would be appreciated

myjdm

Im interested in this too