Hayabusa02

Anyone have any idea if an LS3 swap will be possible on the new Lacrosse? I love the car, but it is very underpowered for what I am used to. I am reluctant to supercharge it or add a turbo until I know a lot more about the engine. So, the short answer would be to do a swap. Otherwise, I'll probably just go with the new Lexus IS-F.

digitalsolo

iTrader: (24)

Honestly, I'd get the Lexus; you'll have many less issues in your brand new car with that setup, and have something better sorted, vs. a swapped 2010 Buick.

Bowtie70SS

iTrader: (10)

Don't buy a Jap car I am sure it can be done. You must have some resources if you are considering that swap. Maybe you can buy a total and start from there that way you don't have the super high inital buy in.

1quickirocz

i assume yours is a 3.6 or 3.8 liter? well considering you can get a ls6 headed 5.3 (ls4) in the lacrosse from the factory then why didnt you just do that. I dont think an actual ls3 will bolt right in due to the front drive 5.3 block being different but a cammed LS4 would make a ton of power. So sell the v6 one and get one with a LS4 already. just my .02

quickta98

^ not anymore. 09 you could get the LaCrosse Super with the 5.3 but on the 10 the 3.6V6 is the top dog.

TTLS1GP

iTrader: (10)

I don't know. I've heard plenty of good things about the IS-F. Apparently, it is in M3 territory and can hold it's own.

Yum! I'm with disposing of the heavy buick and getting the IS-F if it is in your pocket book to do so!

Hayabusa02

It doesn't come with a V8 anymore. That is the whole point of this discussion. I'd lean towards AWD so, I'd be stuck with a 3.0L 255HP engine. Just not enough to be an option in my book. I'd have to believe the LS engine would fit in that engine bay, but I may be wrong. Like I said, Ill probably end up with the IS-F and then see where things go. That way I can drop a twin turbo in it after a couple of years and it will feel like a totally new car.

greenmonster138

Why not stay GM and go with a G8 GTP or a Caddy CTS-V. Any car with fake exhaust outlets worked into the rear bumper is Eehhhh no.

LS1NOVA

iTrader: (12)

Just get a used 09 Super. Do you have to have a 10?

Hayabusa02

I like the look of the 2010 with the upgraded interior and better exterior styling. THe 2009 just doesn't cut it.

I looked at the CTS-V, another good option.

I'll take a car that has engine upgrade potential, but I want at least 450HP.

Eric McGinnis

I came across this with the same idea! Take a beautiful lacrosse and add the power the beautiful car deserves! Someone out there should make it happen! Obviously it will take a bit of fab work and some how to, but it's doable!

G Atsma

The Lacrosse is FWD. There is not a single FWD transaxle that will handle an LS3 for more than a day.

sowbelle

LS3 will not bolt up to transaxle at all
it has the V6 pattern
The LS4 has the V6 tranaxle bolt pattern.
LS4 also has a shorter crank by 10mm to fit in the FWD cars

G Atsma

LOL, I knew that and totally forgot about that little technicality!! DOH!!!

Jimbo1367

4T80E will

fieroguru

iTrader: (1)

LS3 = SBC bellhousing
LS4 = Gm Metric bellhousing
3.6L = GM high feature bellhousing

All 3 are different, but that is what adapter plates are for.

ls1nova71

iTrader: (4)

Does any of this really matter in this 10 year old pipe dream thread???? The car in question was brand new when this thread was made, so wasn't a huge chance of any of it ever happening ...

Kay Lavell

Do you think I could swap the 5.3 Ls into my Lucerne with the northstar