My C5 LS3 Build
 

Hey guys. Havent been on here for a while but thought I would share my current LS3 build with you guys. Back in May I lost a couple main bearings in my LS6 to a damaged lifter and a eatened up cam lobe. Instead of tearing through the block again, I rebuilt it 3yrs ago, I decided to upgrade. Thing is I was on a budget so I decided to go with a LS3 build since parts are cheap and these motors are beast with little mods.

I was able to land a super low mileage L92 short block, which identical to a 6.2L LS3 (same block casting and internals with the exception that the pistons have 2cc valve reliefs). I then got hold of a new LS3 top end, new intake from a friend and new heads from GMPP. A Ligenfelter converter box should allow me to run the LS3 without swapping the cam sensors and crank reluctor wheel.

Here's a list of whats going into this motor so far:
GMPP LS3 heads
LS3 intake w/90mm throttle body
PRC .675 valve springs
Stock rockers
L92 block, DOD delete
Ported and shimmed GM LS6 oil pump
TSP 231/236 .641"/.615" 114lsa cam
TSP 1 3/4 headers
Short x-pipe with two Dynomax bullet mufflers dumping under car
3600 SS Yank
Built 4L65E w/3.42's
LPE 24x58 tooth converter box

Getting things started
Attachment 663

Clean internals, low mileage
Attachment 664

Cam and new oil pump are in
Attachment 665

LS3 heads, huge intake valves!
Attachment 666

2.165" yet only 87 grams
Attachment 667

Installing the PRC .675 valves
Attachment 668

What it'll look like in a few days
Attachment 669

You can store that old LS6 in my Typhoon if you want. I won't charge you storage fees or anything.

Oh Gawd a build thread as if the text messages weren't enough to make me feel slow and poor.

Lol. I have a friend who said he would take but if he doesnt it will be on the market. It has Probe forged pistons and rods with full ARP 2000 bottom end hardware. That would be pretty cool in a Typhoon.

C'mon, I only sent you like two pictures. At least your car runs right now..if you fixed that steering rack.

Ya no...his bearings are gone and the motor is out of the truck.

If the price is right i might be down to get it (need an LS for my impulse)

I'd like an ls6 plz. Maka mustang moe bettah

Let me know so I can put it on layaway.


Can the LS3 be better power wise than the LS6? Isn't the LS6 505hp stock compared to 420hp?

Ls6 is a stronger ls1 basically