View Poll Results: which CNC ports
Patriot Performance
28
27.72%
PRC from Texas Speed
66
65.35%
Other (please list)
7
6.93%
Voters: 101. You may not vote on this poll
Patriot vs. PRC
Thread Starter
On The Tree
Joined: Mar 2006
Posts: 105
Likes: 0
Patriot vs. PRC I am looking to have a new set of ls6 heads ported. I have seriously looked at Patriot and Texas Speed's PRC CNC port jobs. Paired with a 234/228 duration and .576/.571 lift cam (lsa 114). If you think another company would be a better choice, please list the name and about what it costs to have the heads CNC ported.
I have had both sets.
The valves on my patriot heads were not hardened at the tips, so the rocker arm pretty much ate it up. Valves were not even correct to boot.
Now i have PRC heads. They are a million times better. PRC are priced very well, have the customer service to back them, and are every bit as good of quality as you would fine in any other head.
The choice is pretty easy PRC's
The valves on my patriot heads were not hardened at the tips, so the rocker arm pretty much ate it up. Valves were not even correct to boot.
Now i have PRC heads. They are a million times better. PRC are priced very well, have the customer service to back them, and are every bit as good of quality as you would fine in any other head.
The choice is pretty easy PRC's
I've heard too many horror stories about both. And seen some really shady stuff out of one of those two, such as sending my buddy a "custom" tune that was basically a stock tune once we read it with HPtuners.
I voted "other". Go with Livernois heads. No horror stories there. No slow turnaround. No oversized intake runners. No broken rocker mounts. Just power.
I voted "other". Go with Livernois heads. No horror stories there. No slow turnaround. No oversized intake runners. No broken rocker mounts. Just power.
Launching!
Joined: Apr 2003
Posts: 277
Likes: 0
From: Town near you
PRC all the way! This is like asking if someone prefers steak vs. hamburger.If you have any doubt read this thread.
https://ls1tech.com/forums/dynamometer-results-comparisons/591184-518rwhp-heads-cam.html
https://ls1tech.com/forums/dynamometer-results-comparisons/591184-518rwhp-heads-cam.html
Banned
Joined: Apr 2006
Posts: 1,875
Likes: 1
From: Naperville, IL
The valves not hardened properly were not PP's fault, and was corrected some time ago. I also tend to think Joe's car (in the thread link above me) tends to like the larger runner size of the PRC since he's shifting a stock bottom end at 7700.
Both companies do their best, and offer outstanding customer support. I've heard good things about Livernois as well. I would purchase from any of the 3.
Both companies do their best, and offer outstanding customer support. I've heard good things about Livernois as well. I would purchase from any of the 3.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Launching!
Joined: Aug 2004
Posts: 248
Likes: 0
From: Ashland, Ky
Originally Posted by N4cer
I've heard too many horror stories about both. And seen some really shady stuff out of one of those two, such as sending my buddy a "custom" tune that was basically a stock tune once we read it with HPtuners.
I voted "other". Go with Livernois heads. No horror stories there. No slow turnaround. No oversized intake runners. No broken rocker mounts. Just power.
I voted "other". Go with Livernois heads. No horror stories there. No slow turnaround. No oversized intake runners. No broken rocker mounts. Just power.
Well who would that be? I just found out, that the heads that tsp and sdpc sent me was suppose to be cut to 59cc and they are really 61cc. I am pissed. I just found my paper work. And thats what it said on the bottom of my paper work.
Originally Posted by Kounsy
Well who would that be? I just found out, that the heads that tsp and sdpc sent me was suppose to be cut to 59cc and they are really 61cc. I am pissed. I just found my paper work. And thats what it said on the bottom of my paper work.
Banned
Joined: Apr 2006
Posts: 1,875
Likes: 1
From: Naperville, IL
Originally Posted by ArrestMeRed99Z28
Asmodeus, who ported your heads? why did you choose them?
Launching!
Joined: Aug 2004
Posts: 248
Likes: 0
From: Ashland, Ky
well i was told that my ls6 casting heads flow 318 at .600 lift and i cant really remember what the exhaust was. But they seemed to not be able to find any of my specs on the motor they built for me. I think they just told me something so i would shut up.
Ya N4cer that was bullshit on my mail order tune. I hope no one ever does that cause thats a waste of money.
Ya N4cer that was bullshit on my mail order tune. I hope no one ever does that cause thats a waste of money.
Originally Posted by ls1itldo
I have had both sets.
The valves on my patriot heads were not hardened at the tips, so the rocker arm pretty much ate it up. Valves were not even correct to boot.
The valves on my patriot heads were not hardened at the tips, so the rocker arm pretty much ate it up. Valves were not even correct to boot.
Originally Posted by SS4Matt
i had this problem with my patriot heads as well...the patriot valves were peened over by the rocker.....however my patriot supplier replaced my patriot valves with Ferrea's for free....so i can't complain...i was very happy.....as for the fitment...i've heard some **** like that as well...but i have had no problems with my patriot heads other then the valves. for the record, i have the 2.055 intake and 1.60 exhaust valves and i put down 430hp and 365tq to the wheels on a mustang dyno with my custom grind cam
Originally Posted by Asmodeus
I ordered Patriot during the labor day special they ran. Spent $1G incl shipping for the LS6 casting, CNC port job, stock valves with a 5 angle job and TI locks, and the dual springs so I can run my big cam. I'm trying to do a budget H/C build and I know I won't be making the power some of the high end aftermarket castings can make. I'm fine with that. They look good, haven't installed them yet. They flow exactly 300cfm @ .600 which is great imo. The intake runner CC is 227 I believe, so the air velocity should still be pretty good.
Ben T.
Don't forget there is an advantage so similar flow numbers with a 30cc smaller runner Bandit28.
Still you do get high flow potential with the relatively inexpensive PRCs like you mentioned.
Ben T.
Still you do get high flow potential with the relatively inexpensive PRCs like you mentioned.
Ben T.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
A lot of poeple are still too wrapped up in flow numbers. We all know (at least should know) that different flow benches and methods have different results, same as dynos.
If you want the best then fork out the cash. Otherwise check everything and try to get back to the vendor with any issues before install.
When i got my heads, I cc'd them, inspected every angle i could, touched up some burrs, removed the valves, etc...
I had some issues, notified the vendor and it was taken care of in a satisfactory manner.
Some part quality cannot just be seen (like soft valves), this is why, either opt for quality upgrade or stay stock valved.
I've had mine 2 years now and they are still doing good for the $$ spent.
If you want the best then fork out the cash. Otherwise check everything and try to get back to the vendor with any issues before install.
When i got my heads, I cc'd them, inspected every angle i could, touched up some burrs, removed the valves, etc...
I had some issues, notified the vendor and it was taken care of in a satisfactory manner.
Some part quality cannot just be seen (like soft valves), this is why, either opt for quality upgrade or stay stock valved.
I've had mine 2 years now and they are still doing good for the $$ spent.