PRC 237cc Specs / Flow / Pics INSIDE!!
We are still taking pre-orders currently. Expected shipping date is mid-late January! We haven't tested the 6 bolt TFS (only the 4 bolt setup), but to the best of my knowledge their port is the same for 6 bolt vs 4 bolt. They will be very comparable in performance to the TFS heads. Only the LSx 6 bolt pattern is available currently. There is room for more porting in the castings, but for an unexperienced porter it would be very easy to hurt the vehicle's performance by doing so.
__________________
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!
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!
The heads flow about 318cfm @ .600 lift which is great, if you want more power under the curve then you might look into milling the heads.
This is what I was told about my heads from them, a few yrs ago. They are the 2.5(R) LS6 heads they had a while back. Around 2006.
This is what I was told about my heads from them, a few yrs ago. They are the 2.5(R) LS6 heads they had a while back. Around 2006.
correct..they didnt release these as a "budget" or "lower quality" casting than a AFR or TFS. They are direct competitors that should make comparable (or hopefully better!) numbers and results for a comparable price.
We have some on order and cant wait to use them.
It will be nice once these are realesed and see how we can hand port them to be an very competive head for a 15 degree head. Im going to run some of thier older stuff on an LS3 416-about same intake runner volume, but looking at the options for the valves they will be offering.
Launching!
Joined: Apr 2003
Posts: 277
Likes: 0
From: Town near you
It will be nice once these are realesed and see how we can hand port them to be an very competive head for a 15 degree head. Im going to run some of thier older stuff on an LS3 416-about same intake runner volume, but looking at the options for the valves they will be offering.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
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
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Launching!
Joined: Apr 2003
Posts: 277
Likes: 0
From: Town near you
I hear that independent results are on the way soon. From what I hear they are direct competitors with AFR and TFS. There is nothing budget about the aftermarket PRC castings. Current testing proves they are as good or better than the AFR and TFS heads.
Thread Starter
LS1Tech Premium Sponsor
iTrader: (4)
Joined: Nov 2001
Posts: 4,229
Likes: 4
From: Texas!
Looking to get a set on the engine dyno next week guys! I'll keep ya posted!
__________________
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
No issues. I thought we'd already posted the engine dyno results for the 418 we tested them on here. I'll try to get the info up soon guys! Sorry for the delay!
__________________
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!
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!
While I'm noy going to say that it can't be done on a 243 casting, you will be needing one of the best head porters in the nation to get there.
Compare these heads to the TFS 235cc heads on a 4.030" bore fixture (the exhaust #'s are not compareable as the TFS heads are with a 1 7/8" pipe vs no pipe for TSP)
Compare these heads to the TFS 235cc heads on a 4.030" bore fixture (the exhaust #'s are not compareable as the TFS heads are with a 1 7/8" pipe vs no pipe for TSP)
Is this True about the TFS head not flowing more cause of them being flowed with a 1 7/8 pipe ?
A pipe on the exhaust will increase the numbers.
__________________
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!
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!
