PRC 5.3L 2.5 Heads?

Reply Subscribe

Thread Tools

Search this Thread

Oct 27, 2009 | 07:35 PM

mach1

Thread Starter

On The Tree

iTrader: (6)

Joined: Jan 2002

Posts: 184

Likes: 0

From: Arlington, TX

PRC 5.3L 2.5 Heads?

I was told that the head's didn't have cnc'd chambers but I just got mine and they do, anyone else's have cnc'd chambers? If so, has anyone CC'd them for chamber volume?

Oct 27, 2009 | 07:46 PM

DVS99TRANS

TECH Fanatic

iTrader: (7)

Joined: Nov 2005

Posts: 1,169

Likes: 1

From: E City,NC & Newark,DE

I have a set undecked but never measured the cc's though. If you got them from TSP, and you are using a MS3 or MS4 they recess the valves a little for better PTV clearance. I think the castings undecked have 64cc chambers, but don't quote me on that.

Oct 27, 2009 | 08:12 PM

SOMbitch

TECH Senior Member

iTrader: (8)

Joined: Sep 2007

Posts: 6,881

Likes: 3

Yes they clean up the chambers a bit and they SHOULD check in at the 63cc range...

Oct 28, 2009 | 12:39 AM

LSX Truck

Teching In

Joined: Oct 2009

Posts: 36

Likes: 0

From: CA

or mill 'em down to 59cc

Oct 28, 2009 | 07:28 AM

2000PewterZ28

Launching!

Joined: Apr 2003

Posts: 277

Likes: 0

From: Town near you

The PRC 5.3 heads do have a cnc'd chamber.

Oct 28, 2009 | 09:09 AM

mach1

Thread Starter

On The Tree

iTrader: (6)

Joined: Jan 2002

Posts: 184

Likes: 0

From: Arlington, TX

I'd love to mill em but my P2V will be too close for comfort, thanks for the reply's guys.

Oct 28, 2009 | 09:15 AM

Sales2@Texas-speed

LS1Tech Premium Sponsor

iTrader: (5)

Joined: Jan 2008

Posts: 5,053

Likes: 7

From: Texas!

As stated, the 5.3's do have CNC'd chambers, the LS6's do not. Let us know if we can help with anything else on your setup!

__________________

Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!

COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!