azchevydude

Ok thanks all. Yes i would like to get CNC Ported heads Through SDPC but since i am having a shop do the build would it be bad taste to tell them that i will get the heads? rather than having them get heads and sending to a machine shop and then they would complete them. I don't want to step on any toes. He did say he could get 243 heads for around $600 but these would still need work.

TXSZ66AVLANCHE

iTrader: (7)

Whats the fun in that?

azchevydude

I have never done a bottom build.

TXSZ66AVLANCHE

iTrader: (7)

Its pretty easy, the only special tools you need are a torque wrench and angle meter to seat and install the rod and main bearings.

The connecting rods are press fit to the pistons so you need to take them to a machine shop to have the new pistons swapped over to the rods. Also the machine shop can polish your stock 5.3 crank or grind it if it's in bad shape, they should also have the correct size bearing in stock as well.

Angle Meter

Amazon.com: Lisle 28100 Torque Angle Meter: Automotive

azchevydude

10.4 ratio just means running 91 gas? Anything else?

1FastBrick

iTrader: (17)

The rods being press fit depend on the year around 2005 They started using floating pin LS2 Style rods in the 5.3L

The LQ9 got them in late 03 as the second design.

1FastBrick

iTrader: (17)

When the valve is too close to the edge of the bore, the airflow can become restriced and in some cases stall. This is typically seen on the flow bench when testing with a borefixture to see how the air will react withen the cylinder.

grey matter 04

iTrader: (9)

Here is a pick of my heads.The shop did some work to unshroud the valve in the chamber.

1dirtybird

iTrader: (7)

Who is doing your build? From your screen name i assume your are in Arizona.

Also all nnbs 5.3's came with flat tops stock too


$600 for stock 243's is kinda pricey, imo

Dirty

1dirtybird

iTrader: (7)

Neat tool, but you only need that if you are using torque to yield bolts (stock replacement) not needed if yuing ARP stuff