Tfs 235 vs. Prc 247
Tfs 235 vs. Prc 247 I have a 6.0 That I am stroking to a 408. I have a fast 102 intake, -3cc pistons, Texas giant cam, 42lb injectors, trunion upgrade, ls2 chain, tsp 4" forged crank. I think that's about all that's needed. But what do you guys think? Is 2000 good for a used set of tfs or should i spend the extra 400 for the tsp 247 which are better in terms price to cfm are the 247 really much better both have the same valves and both have the .660 Springs. What's everyone's opinion.
On The Tree
Joined: Aug 2007
Posts: 141
Likes: 2
You don't make a cylinder head decision on cfm numbers alone. You need to do a little math and talk to the experts first to see what your combination requires. High cfm doesn't mean its good for your motor and high cfm / big ports can actually reduce power from your engine. You might make alot more TQ with a smaller port/cfm numbers then you would with high cfm numbers -- airspeed is what matters, CFM numbers sell parts, high airspeed with correct port size/valve size wins races.
Last edited by SRT8.Acelleration; Jul 9, 2018 at 04:56 PM.
well that's the thing I can get either the prc 247s a set of tfs 235s or now maybe a set of ls6 heads done up by cbm. If I can save money but still getva good head that will compliment my setup id be happy.
Trending Topics
TECH Fanatic
Joined: Aug 2009
Posts: 1,845
Likes: 255
From: Coast of San Mateo County Between Pacifica & HMB
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
Probably worth getting some expert opinions from the various vendors etc.
FWIW in my limited experience it's usually better to go with the head that has the smaller port volume when picking between two similar heads that can meet your goals. Usually the higher velocity of the slightly small port will drive better and usually make the same or better power with the correct cam.
I'd go with TFS 235's over the PRC 247's for your 408.
FWIW in my limited experience it's usually better to go with the head that has the smaller port volume when picking between two similar heads that can meet your goals. Usually the higher velocity of the slightly small port will drive better and usually make the same or better power with the correct cam.
I'd go with TFS 235's over the PRC 247's for your 408.
On The Tree
Joined: Aug 2007
Posts: 141
Likes: 2
TECH Veteran
Joined: Sep 2014
Posts: 4,893
Likes: 706
From: Mississippi
Originally Posted by Tuskyz28
people say Mast.... I'm still waiting to see more track results myself. One car going fast with them don't tell me ****. I'm just saying.....
