ssowned

I just did a L9H swap into my 2001 Camaro SS. It was actually really easy if you buy the right parts. Obviously the Lingenfelter crank signal converter is the easiest route and it works great. You don't need to buy all the wire extensions, you can make the knock sensor wires longer as well as the map sensor, just make sure you buy some heat shielded wire protection. The LS1 map sensor requires an extra 'o' ring to be secured into the LS3 intake and we also built a small bracket to put pressure on it out of aluminum. I bought a 92mm throttle body with the throttle cable because drive by wire is crap IMO.

The specs:
2001 Camaro SS (LS1 ECU)
6.2L L9H (2009 Escalade engine)
Custom cam (w/ Comp 921 springs)
Cast 823 heads (stock)
Hooker LTs 1 3/4, Y-Pipe to Borla muffler
92mm TB
85mm Maf (soon to be 100mm Z06 Maf)
Stock lid, ported for larger ID into MAF
S60 Rear End w/ 4.10s

On a very conservative tune it made 428rwhp, 405rwtq. Waiting on the MAF install and another more aggressive tune.

1961ba427

iTrader: (26)

I always here that you have to have a 98-02 F-body LS1 oil pan, but from looking at the specs it seems that one for a CTS-V would also work.

Has anyone tried that yet?

cabel1

iTrader: (3)

What are you guys doing for the pcv? I'm in the process of my swap and the ls1 has a port in both valve covers whereas the l92 only has the pcv in the drivers side

cam

iTrader: (9)

The L92 rear port on the drivers valve cover is the "dirty" side which routes to the nipple on the LS3 intake just behind the TB. The clean side comes off the front of the pass side valve cover and you have to pipe it somewhere into the intake tract AFTER the maf but BEFORE the TB. I also advise a catch can while your at it. Dual Saikou Michi is a good option

That said I didnt consume hardly any oil with mine just running it without the catch can but this seems to be less common.

trevmust

so the LS1 computer will work with the LS3 after a reprogram? Or do I need to buy a corvette ecm..

ssowned

Sure, but you will have to ensure that whatever LS3 variation you use that it does not have VVT, AFM. You can find all the information on the conversion thread.

I used a L9H from a 2009 Cadillac Escalade and my LS1 computer runs it just fine. I had to use the Lingenfelter signal converter box because of the 58x reluctor and I changed back to a compatible 3 bolt cam to replace the VVT.

keith102371

iTrader: (20)

whats the part# for the cam cover kit now? 12633906 is the one I came up with, is that the right one for the swap?
https://sdparts.com/details/gm-facto...parts/12633906

98cobrakiller

so whats the difference between swapping the ls3 into a 98 fbody from the 99-02 years

VTC_WS6

iTrader: (9)

I know much of this has been beaten to death, and many of these questions have been asked and answered in excess, but for the life of me I just want to make SURE I have every angle covered. I just picked a GMPP LS3 crate motor, obviously this is a complete engine with intake, rail, injectors, sensors etc.. From what I gather, this should pretty helpful since there are adapters for virtually all the newer sensor hardware in use with older vehicles like my '00 WS6. Couple things I want to be sure on though:

1. Will the LS3 fuel rail plug right into the original fuel line?

2. Will the LS1 rear cover be required, or can I use the LS3 rear cover already installed on the motor?

3. I've gotten mixed answers on this, but do I need some kind of adapter for the LS3 MAP sensor, or is it just an extension harness for location purposes? I see folks selling extension harnesses but I haven't seen adapters for them as of yet.

4. I'm assuming the oil pumps are interchangeable as my idea was to install my low milleage ported LS6 pump, any problems?

TIA for the input, keep up the good information and the patience!

ez2cdave

As far as I know, the Computer is different in the 98 f-body and would have to be swapped out for a 99-02 unit.

VTC_WS6

iTrader: (9)

Seeing as my car is up and running, I'll go ahead and answer some of my own questions here in case someone else comes across with the same questions:

Yes.

LS3 cover works just fine.
Katech supplies an extension/adapter harness.

No problem.

You're welcome..... kinda get the feeling I'm talking to myself

keith102371

iTrader: (20)

Did you use the ls3 map or ls1?

VTC_WS6

iTrader: (9)

LS3 with Katech adapter/extension harness.

Badguy7

iTrader: (6)

So if i just do a drop in Crate LS3 in my 02 Camaro SS. What all will i need to make it work?

VTC_WS6

iTrader: (9)

^
Doesn't work btw, found that out last night. Unknown to me, the LS3's use a different scale MAP sensor than LS1/2/6 models, so keep your LS1 MAP sensor and just use an extension harness.

Jonscar912

iTrader: (1)

Where the the best place to purchase everything needed for the ls3 swap.. Like cam sprocket..timing cover..etc..???

The Guy in MY 99TA

maybe I missed it.... but what about the ls1 style oil sending unit? The valley cover that came on my buddies ls3(it was a gm 485 crate motor that was pulled from a kit car) has a total different design oil pressure sending unit. I haven't had time to check to see if I can put an adapter in to make it work.

We are not trying to keep any of VVT, AFM or anything. Shooting for a stock bottom end LS3 record car so none of that will be used but would like to keep the factory sending unit.

j88l98irocz

iTrader: (44)

Ls3 Oil pressure senders have the same threads as ls1.

Andrewfus

iTrader: (1)

Can I just put a 6.0 crank from older block with 24x reluctor wheel in my ly6 block?

handyandy496

iTrader: (9)

fyi You can keep the map sensor pluged into the original harness location but run vacuum hose to the front of the ls3 manifold.