Which heads to put on my 408
http://www.hotrod.com/techarticles/e...t/viewall.html
I would point to that test as one independent test as to why many chose PRC over AFR and MAST.
Comparing to the AFR: PRC makes within 1hp of the AFR's at peak HP, and equal torque. The PRC however made an extra 2.6hp AVERAGE, and 3.6ftlbs more AVERAGE, all at a price point several hundred dollars less.
I find it mind-numbing to use that article to compare the MAST and PRC heads, because the MAST heads tested were LS3 heads, not cathedral. Although the PRC cathedral 237's did pretty well against their LS3's over-all (and with a price difference even greater than that between the PRC's and AFR heads)!
I would point to that test as one independent test as to why many chose PRC over AFR and MAST.
Comparing to the AFR: PRC makes within 1hp of the AFR's at peak HP, and equal torque. The PRC however made an extra 2.6hp AVERAGE, and 3.6ftlbs more AVERAGE, all at a price point several hundred dollars less.
I find it mind-numbing to use that article to compare the MAST and PRC heads, because the MAST heads tested were LS3 heads, not cathedral. Although the PRC cathedral 237's did pretty well against their LS3's over-all (and with a price difference even greater than that between the PRC's and AFR heads)!
__________________
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!
I found that test fascinating when it came out. One thing that was obvious is how close they all are. With the exception of the under-performing World Products head, they were all withing 3 or 4 average horsepower of one another. In fact, the CNC factory casting was right there in the fight.
What I took away from it was that CNC ported factory castings are a great bargain! So, I bought the TSP CNC LS6 heads.
What I took away from it was that CNC ported factory castings are a great bargain! So, I bought the TSP CNC LS6 heads.
Yes sir, a few horse here and there to be had, and a few $$ to save as well 
__________________
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!
Staging Lane
Joined: Jun 2012
Posts: 92
Likes: 0
I found that test fascinating when it came out. One thing that was obvious is how close they all are. With the exception of the under-performing World Products head, they were all withing 3 or 4 average horsepower of one another. In fact, the CNC factory casting was right there in the fight.
What I took away from it was that CNC ported factory castings are a great bargain! So, I bought the TSP CNC LS6 heads.
What I took away from it was that CNC ported factory castings are a great bargain! So, I bought the TSP CNC LS6 heads.
But I must say that it was a good article with interesting results. You cant argue with facts so it looks like the 237 is the better head for the money for a 408. The article did state that the AFR 245 was better suited for a larger bore but we're talking about a 408 here so I would have to give the PRC the win.
I did ask tvwilkes why he would recommend them as I find it funny that he is prc and doesnt come out and say thats why he supports them...LOL
Maybe in the future I'll have to consider the 237 when recommending heads.
Any reports on longevity of the head? in the past you guys had an issue with breakage and sharp edges on your PRC oem stuff . It always biased me for obvious reasons..
Isnt the deck less thicker than the AFR as well? How does that come into play with power adder engines? Do you have anyone with a lot of miles and track passes... pulled the heads to have a look at things and no cracking or compromises of any kind?
Looking at the flow numbers, my thought was that they would perform about the same.
I am always kind of surprised at how people say oh this head rocks and that one sucks even though they have similar flow numbers. The TEA vs. AI vs. TSP threads are a perfect example. Looking at that magazine test makes me think that people who take extreme position in those threads are kind of amusing.
I am always kind of surprised at how people say oh this head rocks and that one sucks even though they have similar flow numbers. The TEA vs. AI vs. TSP threads are a perfect example. Looking at that magazine test makes me think that people who take extreme position in those threads are kind of amusing.
LOL TEA LS6 were tested not prc
But I must say that it was a good article with interesting results. You cant argue with facts so it looks like the 237 is the better head for the money for a 408. The article did state that the AFR 245 was better suited for a larger bore but we're talking about a 408 here so I would have to give the PRC the win.
I did ask tvwilkes why he would recommend them as I find it funny that he is prc and doesnt come out and say thats why he supports them...LOL
Maybe in the future I'll have to consider the 237 when recommending heads.
Any reports on longevity of the head? in the past you guys had an issue with breakage and sharp edges on your PRC oem stuff . It always biased me for obvious reasons..
Isnt the deck less thicker than the AFR as well? How does that come into play with power adder engines? Do you have anyone with a lot of miles and track passes... pulled the heads to have a look at things and no cracking or compromises of any kind?
But I must say that it was a good article with interesting results. You cant argue with facts so it looks like the 237 is the better head for the money for a 408. The article did state that the AFR 245 was better suited for a larger bore but we're talking about a 408 here so I would have to give the PRC the win.
I did ask tvwilkes why he would recommend them as I find it funny that he is prc and doesnt come out and say thats why he supports them...LOL
Maybe in the future I'll have to consider the 237 when recommending heads.
Any reports on longevity of the head? in the past you guys had an issue with breakage and sharp edges on your PRC oem stuff . It always biased me for obvious reasons..
Isnt the deck less thicker than the AFR as well? How does that come into play with power adder engines? Do you have anyone with a lot of miles and track passes... pulled the heads to have a look at things and no cracking or compromises of any kind?
__________________
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!
TECH Enthusiast
Joined: Apr 2010
Posts: 651
Likes: 10
From: North Carolina
https://sdparts.com/search/node/LS3%20cnc
https://sdparts.com/details/scoggin-...nter/sd5879b-1
https://sdparts.com/details/scoggin-...enter/sd5882-1
https://sdparts.com/details/scoggin-...enter/sd8802-1
Last edited by ez2cdave; Nov 7, 2012 at 07:41 AM.
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
