flyingbrianjeep

the bottom end of my LS2 decided to retire itself last night. I found a real nice LS3 motor in the GM PP
https://store.gmperformanceparts.com...-19244549--%3E

has anyone put an ls3 into an ls2 m6 goat? will it mate to the trans? what else is needed as far as wiring, electrical, fuel? any help would be greatly appreciated
Thanks!

RedHotG8

iTrader: (1)

The LS3 will bolt up to the trans but I don't know if the wiring is compatible. Ask your Pontiac dealer, they should know for sure. The G8 GXP has an LS3 so I don't see why you couldn't put one in your GTO.

reeperz28

iTrader: (1)

trans will mount and everything will fit but fuel rails and intake if it does not come with a rectangle port intake and i believe the reluctor wheel is 58 x where as ls1-2 are 24x. There are conversion boxes out i know that lingenfelter has one .

Robofuzz

Will bolt right in. But reluctor wheel will need to be changed or the Lingenfelter box used. You'll need to use the GTO oil pan and pickup off the LS2.

flyingbrianjeep

the crate motor comes with fuel rails and an intake, but will the exhaust line up? i have factory manifolds. and what about emissions? ecu? i am new to the LS world. ive had the car a week when the motor let go :-( wiring harness?

flyingbrianjeep

Made some calls this morning. Looking like the lingenfelter box and a reprogramming of the stock computer is pretty much all i will need and then its plug and play from there. Anyone else have any input from this?

slow

iTrader: (7)

there is a good thread on this on ls1gto.com But you have the basics covered.

Ryan

flyingbrianjeep

do you have a link?

RedHotG8

iTrader: (1)

If you bought the car from a dealer they should cover the motor after one week. What caused the motor to get damaged?

flyingbrianjeep

i purchased the car from another forum user. it was in ABSOLUTE MINT condition. I was going for a 330 am blast down the highway and did something dumb. i blew it up.

6.0vette

Just get right reluctor wheel and cam gear changed! Everything else is plug and play. Makes for a much cleaner install and that'll be one less thing to fail and or worry about later on!

flyingbrianjeep

Ordered pro harness and tune from pcmforless, lingenfelter box, and motor. Picking up motor monday. Get ya some pics monday evening.

flyingbrianjeep

motor is in the shop

N2OBaby

Good luck with the LS3.

flyingbrianjeep

hey does anyone know where i can get a list of the specifications of the ls376. so i can send it to pcm4less. like the lb/hr of the injectors the degree of the cam and all that. rather long list. any help be greatly appreciated

flyingbrianjeep

anyone know how i can get the map sensor to work

flyingbrianjeep

map sensor problem solved with a lingenfelter adapter

flyingbrianjeep

now i need to figure out of swapping the harmoninc damper will make the accessorys from the ls2 line up on the ls3 so i can get some belts on it

flyingbrianjeep

car is done and driving finally. 3 lingenfelter boxes later. 2 ended up being defective.
anyone else got an ls3 gto

99twinturbofirebird

iTrader: (3)

there is a guy on ls1gto that has a yellow 04 that swapped an ls3 i believe