prepping a 5.3 for boost
you can get the gm part # 125955365 for about $8 each 4 required from the dealership.if you decide to buy a new cam you can get new gm lifters part #12499225.the delphi ones are $99 and gm are $140.both have same part number.if the dealer ship is more then i am saying the you can also use liljohn or brian tooley.hope this helps some
8 Second Club
Joined: Apr 2006
Posts: 1,011
Likes: 31
From: in my neighborhood
Google "5.3 notch" and the first image that comes up shows the 5.3 heads with and without the notch. I did not want to post the link for Performance Truck as I am not sure if that is against the rules.
The LS1 or LS9 gasket will only work if you do not have the notch which requires a Graphite HG vs a Metal MLS like the LS9.
The LS1 or LS9 gasket will only work if you do not have the notch which requires a Graphite HG vs a Metal MLS like the LS9.
^^^hence why sent him to the post and also said "correct me if I am wrong". From what was gathered it stated that the VR hg would work on both notch and non - notch heads but the LS specific hg like the LS9 will only work for non-notch.
TECH Regular
Joined: Jun 2011
Posts: 420
Likes: 0
From: Milwaukee, Wi.
If your motor comes with the Castech 706 heads, I'd probably swap them out right away. They have a habit of cracking. Google castech 706 heads, it should pull up some articles, and show you how to I.D. them. I just wish someone would've told me about them before I stuck money, into mine.
this is bullshit. victor reinz makes MLS gaskets for the notched heads. Amazon.com: Victor Reinz 54441 Cylinder Head Gasket: Automotive this is why people spend ludicrous amounts of money on their cars when they dont have to. internet misinformation.
They do leak - I've seen it myself
However, I'd agree that link is a good alternative.
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Verdad Gallardo 8 Second Club
Joined: Apr 2006
Posts: 1,011
Likes: 31
From: in my neighborhood
as far as i know you can use the ls2 tray in your 5.3.the part# on the trays for your engine should be 12595365 if i remember right.they should be about 7.95 each.hope this helps
On The Tree
Joined: Jan 2013
Posts: 104
Likes: 0
From: Regina, canada
Build a 6.0 and run 14 # of boost, that shud get you around 600 hp and maybe a cam change to go with it. A 6.0 seems to make way more power than a 5.3. Im not sure why, because the cube diff aint that much !!!
8 Second Club
Joined: Apr 2006
Posts: 1,011
Likes: 31
From: in my neighborhood
We did a 5.3 with the following parts:
04 ls6 cam
prc 650 springs. I know lol
ls9 head gaskets
ARP Head studs
open the ring gap I don't recall how much.
ARP rod bolts
ls2 lifter trays and lifters
ls2 oil pump with red spring
iwis timing chain
ls6 intake
BW s480
317 heads stock valves no portwork
80# injector duty cycle 78% with meth on the safe side
13* timing AFR average 11.3-11.6
This combo netted us 700+ on 17_18 psi through a 4l80e with a nitrous converter. We will swap the converter at a later date.
04 ls6 cam
prc 650 springs. I know lol
ls9 head gaskets
ARP Head studs
open the ring gap I don't recall how much.
ARP rod bolts
ls2 lifter trays and lifters
ls2 oil pump with red spring
iwis timing chain
ls6 intake
BW s480
317 heads stock valves no portwork
80# injector duty cycle 78% with meth on the safe side
13* timing AFR average 11.3-11.6
This combo netted us 700+ on 17_18 psi through a 4l80e with a nitrous converter. We will swap the converter at a later date.
8 Second Club
Joined: Apr 2006
Posts: 1,011
Likes: 31
From: in my neighborhood
We did a 5.3 with the following parts:
04 ls6 cam
prc 650 springs. I know lol
ls9 head gaskets
ARP Head studs
open the ring gap I don't recall how much.
ARP rod bolts
ls2 lifter trays and lifters
ls2 oil pump with red spring
iwis timing chain
ls6 intake
BW s480
317 heads stock valves no portwork
80# injector duty cycle 78% with meth on the safe side
13* timing AFR average 11.3-11.6
This combo netted us 700+ on 17_18 psi through a 4l80e with a nitrous converter. We will swap the converter at a later date.
04 ls6 cam
prc 650 springs. I know lol
ls9 head gaskets
ARP Head studs
open the ring gap I don't recall how much.
ARP rod bolts
ls2 lifter trays and lifters
ls2 oil pump with red spring
iwis timing chain
ls6 intake
BW s480
317 heads stock valves no portwork
80# injector duty cycle 78% with meth on the safe side
13* timing AFR average 11.3-11.6
This combo netted us 700+ on 17_18 psi through a 4l80e with a nitrous converter. We will swap the converter at a later date.
. The compression on a 5.3 dish pistons is around 9.5.1 or 9.7 cant remember off the top. Ill have to look at the build notes on it but the compression is low. Later on we are going to machine a ring in the head and block for the mile event this year and set it on kill