HOT ROD head comparison (cathedrial vs square)
10-25-2010, 10:20 AM
#61
Still makes sense, to me, to inform the customers on a chart such at this that you have to either supply your own castings or buy new ones. Call it $500 for used casting from the classifieds and that goes to $26.57ish per HP (still a nice bang for the buck of course, but a little deceiving, IMO, when you're only comparing them to aftermarket castings) . And didn't they have a smaller chamber than the "standard" for the test??
Still nice results though, and no surprise from the ported LS6's....I would have loved the opportunity to send some of our ported LS6 heads too for a better comparison with the TEA's!! Maybe they'll line up some ported LS6's for another article down the road
Still nice results though, and no surprise from the ported LS6's....I would have loved the opportunity to send some of our ported LS6 heads too for a better comparison with the TEA's!! Maybe they'll line up some ported LS6's for another article down the road
__________________
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!
10-27-2010, 05:53 PM
#64
I thought I would create a spreadsheet for the results, I should probably follow this up with one of avg coefficient of discharge based on valve diameter, flow and port volume. That would probably explain the results a little better, especially when you consider the heads with the smallest port volume (Procomp at 219cc) made the most HP and the some of the largest heads made the least (Dart 249cc and World 255cc)
I was surprised that the TFS 235 heads had the highest average torque and the highest average horsepower, but didn't have the highest peak torque or peak horsepower.
Something to note, the CNC program for the TEA LS6 heads is all new for 2010, it was in the works for a couple years.
I put the cost per horsepower gained, which made the most sense to me.
I was surprised that the TFS 235 heads had the highest average torque and the highest average horsepower, but didn't have the highest peak torque or peak horsepower.
Something to note, the CNC program for the TEA LS6 heads is all new for 2010, it was in the works for a couple years.
I put the cost per horsepower gained, which made the most sense to me.
10-29-2010, 07:27 AM
#67
TECH Apprentice
Join Date: Nov 2005
Location: ne ct summer,naples in the fall
Posts: 308
Likes: 0
Received 0 Likes
on
0 Posts
they should have bolted on a set of tfs 225 and the results would have blown the other two away....typical biased test...guess who advertises in their mag????
10-30-2010, 11:25 AM
#69
http://www.gmhightechperformance.com...ugh/index.html
10-30-2010, 04:03 PM
#70
Agreed. This article is the one that really turned my head towards the L92's check it out
http://www.gmhightechperformance.com...ugh/index.html
http://www.gmhightechperformance.com...ugh/index.html
10-30-2010, 08:13 PM
#71
Agreed. This article is the one that really turned my head towards the L92's check it out
http://www.gmhightechperformance.com...ugh/index.html
http://www.gmhightechperformance.com...ugh/index.html
Although I have no doubt that they will perform well on that larger motors with the larger cams, I would like to see how the lower end of the torque curve looks on a milder 5.7 or 6.0 motor compared to ported LS6 heads.
07-17-2013, 07:50 PM
#72
Head Comparison I thought I would create a spreadsheet for the results, I should probably follow this up with one of avg coefficient of discharge based on valve diameter, flow and port volume. That would probably explain the results a little better, especially when you consider the heads with the smallest port volume (Procomp at 219cc) made the most HP and the some of the largest heads made the least (Dart 249cc and World 255cc)
I was surprised that the TFS 235 heads had the highest average torque and the highest average horsepower, but didn't have the highest peak torque or peak horsepower.
Something to note, the CNC program for the TEA LS6 heads is all new for 2010, it was in the works for a couple years.
I put the cost per horsepower gained, which made the most sense to me.
I was surprised that the TFS 235 heads had the highest average torque and the highest average horsepower, but didn't have the highest peak torque or peak horsepower.
Something to note, the CNC program for the TEA LS6 heads is all new for 2010, it was in the works for a couple years.
I put the cost per horsepower gained, which made the most sense to me.
Thanks for the spreedsheet. This is great info, I was actually just fixing to post a thread asking info on the several of the heads that are in this paticular article. Don't have too now.
It's amazing what a search will turn up
Sounds like a new set of heads's are in my future plans.
07-18-2013, 07:50 AM
#73
I thought I would create a spreadsheet for the results, I should probably follow this up with one of avg coefficient of discharge based on valve diameter, flow and port volume. That would probably explain the results a little better, especially when you consider the heads with the smallest port volume (Procomp at 219cc) made the most HP and the some of the largest heads made the least (Dart 249cc and World 255cc)
I was surprised that the TFS 235 heads had the highest average torque and the highest average horsepower, but didn't have the highest peak torque or peak horsepower.
Something to note, the CNC program for the TEA LS6 heads is all new for 2010, it was in the works for a couple years.
I put the cost per horsepower gained, which made the most sense to me.
I was surprised that the TFS 235 heads had the highest average torque and the highest average horsepower, but didn't have the highest peak torque or peak horsepower.
Something to note, the CNC program for the TEA LS6 heads is all new for 2010, it was in the works for a couple years.
I put the cost per horsepower gained, which made the most sense to me.
