Philhippy45

iTrader: (5)

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.

SRT8.Acelleration

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.

Gooze_1

iTrader: (3)

I'd go with the tfs 235s

Tuskyz28

Go with TFS 245s finished by Brian Tooley
You'll run 10s with ease doing so.

Philhippy45

iTrader: (5)

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.

Tuskyz28

Why you stuck on the 235 tfs heads instead of the 245 tfs heads....

Philhippy45

iTrader: (5)

cuz I can get the 235s cheaper lol

NAVYBLUE210

Agreed, between the two choices, TFS 235s.
Especially with that Giant Cam, better performance & drivability.

Philhippy45

iTrader: (5)

So far 2 for the 235s

99 Black Bird T/A

iTrader: (4)

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.

Philhippy45

iTrader: (5)

So far 3 people are saying 235 over 247. Im looking to at least get 5 before i pull the trigger.

G Atsma

OK, here's one more...

SRT8.Acelleration

READ THIS FIRST

http://darinmorgan.net/frank-talk-about-flow-numbers/

JakeFusion

iTrader: (7)

Frankenstein 237s...

big hammer

Gooze_1

iTrader: (3)

What would be a step up from them?

wannafbody

iTrader: (2)

Mast Small Bore LS3 heads but they are $$$$$$$$$$$$$

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.....

Gooze_1

iTrader: (3)

I've got mms 235s myself, I was just curious as in why the tfs are a beginners head

Public Enemy

Tfs 235