Precision Race Components Ported 6.2L Cylinder Heads Almost Ready!
01-09-2007, 07:25 AM
#147
TECH Senior Member
iTrader: (15)
Join Date: Nov 2001
Location: Grand Prairie, TX
Posts: 5,109
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by LS2 Pontiac GTO
Any idea on when A CNC L92 will be designed to work with the stock displacment LS2?
01-09-2007, 09:00 AM
#148
From all the info that I have been able to find on these heads is that the intake side is pretty much perfect as cast and the exhaust side is the one that needs a little help..Chevy engineers really did thier home work on these heads before they went into production..now that things are getting back to normal after the holidays I would guess that we should see some CNC work finished and some heads ready for the consumer shortly .. even the guys at TSP have a "life" too ... 
01-09-2007, 08:53 PM
#149
Been told that TSP is just waiting for the program to start cutting these things. They were supposed to have it last Wed. so that is the hold up. I already have a set of these ordered since the very beggining of Dec. So if you guys think it's killing you, I already paid for them.
01-10-2007, 07:26 AM
#151
TECH Senior Member
iTrader: (15)
Join Date: Nov 2001
Location: Grand Prairie, TX
Posts: 5,109
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Jon@Texas-Speed
Sorry guys, I didn't realize this thread was even in here. (Been gone a few months) We are waiting on the program still. Hoping to have everything lined out VERY soon! Believe me we are trying to hurry! I'm wanting a set for my car too!
01-12-2007, 09:54 AM
#153
Actually the digitizing did take a lot longer to do this time. The digitizing system was being relocated so it was down for sometime 
It's on the cnc machine right now though guys
Jason
Texas Speed
It's on the cnc machine right now though guys Jason
Texas Speed
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
01-12-2007, 02:14 PM
#156
10 Second Club
iTrader: (5)
Join Date: Jul 2005
Location: by my computer
Posts: 2,958
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Jason 98 TA
We're nearly finished tweaking the 6.2l cnc program for you guys wanting to tryout the rectangle port heads on your strokers! We spent a lot of time developing the port & setting the valve height up for extra p/v while still flowing BIG AIR! These cylinder heads will be available with either stock 2.160"/1.59" valves, or the stage 2 2.180"/1.6x" valves. Either option will be shipping with our new valve spring option. With this setup I feel these heads will support about .630" lift or so. I'll test a few different setups to confirm this, but that's my guess...Compare these flow numbers to others flowed on much larger bores...
We all can assume the stock valves are for shortblocks with a 4.060 bore or smaller and the 2.18/1.60 valves are for engines with a 4.1 or larger bore. Have you considered the potential issues with PTV/valve shrouding by using the larger valved head on a 4.0 or 4.030 bore? It would be ill advised for someone to purchase these heads and not know what piston combination they can put on without potential failures. Just wonderin
01-12-2007, 07:46 PM
#157
TECH Veteran
iTrader: (53)
Join Date: Feb 2004
Location: Monticello, Kentucky
Posts: 4,433
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Forteen3GT
We all can assume the stock valves are for shortblocks with a 4.060 bore or smaller and the 2.18/1.60 valves are for engines with a 4.1 or larger bore. Have you considered the potential issues with PTV/valve shrouding by using the larger valved head on a 4.0 or 4.030 bore? It would be ill advised for someone to purchase these heads and not know what piston combination they can put on without potential failures. Just wonderin
01-12-2007, 07:59 PM
#158
Originally Posted by V6 Bird
The digitizing of the port doesnt take that long. Its the actual port work and shaping things to show gains that you want. I know how difficult it is.
01-12-2007, 10:43 PM
#159
On The Tree
Join Date: Jan 2007
Location: IL
Posts: 152
Likes: 0
Received 0 Likes
on
0 Posts
Waiting On The New Lsx Block. Have 3.62 Callies Crank, 6.125 Dyer's Rods And A Set Of L92 Bare Heads With Carbed Intake. Want To Know What Valves Using And What Lift And Rpm Spring Are Going To Be Good To 700 Lift, 7500 Rpm How Light Are Valve. What Rocker Arms Do You Suggest
01-13-2007, 05:26 AM
#160
TECH Veteran
iTrader: (53)
Join Date: Feb 2004
Location: Monticello, Kentucky
Posts: 4,433
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by LS1LT1CAM
Waiting On The New Lsx Block. Have 3.62 Callies Crank, 6.125 Dyer's Rods And A Set Of L92 Bare Heads With Carbed Intake. Want To Know What Valves Using And What Lift And Rpm Spring Are Going To Be Good To 700 Lift, 7500 Rpm How Light Are Valve. What Rocker Arms Do You Suggest