the best heads for a 440 
the best heads for a 440
The TFS heads will make 20-40rwtq more in the lower/mid RPM's vs. ported LS7's where around 6K RPM the LS7's will begin to shine. The difference up top isn't a ton better on the LS7's compared to how much the TFS heads beat them in the low/mid range. LS7's up top will only make around 10-15rwhp more. Torque is about the same.
In the end they will end up costing about the same. I say TFS heads.
Don't have any bends in the air intake inlet.... meaning no 90* bends. That will suck up 20rwhp+
In the end they will end up costing about the same. I say TFS heads.
Don't have any bends in the air intake inlet.... meaning no 90* bends. That will suck up 20rwhp+
Last edited by gnx7; Aug 28, 2012 at 04:29 PM.
I would definitely recommend the PRC aftermarket casting 285 LS7 heads for this sized motor. They will easily make some of the most power out of any head available for this type of setup.
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Staging Lane
Joined: Aug 2009
Posts: 79
Likes: 1
Try Googling both heads and look at the results for each.
Make your discission based on your research and proven results like dyno figures and track times and not on someone's personal opinion or vested interest. There are a number of great brands out there at present so have an open mind when you do your research.
If you can find results that have been duplicated on a number of different builds there is a good chance it will work for you as well.
Being a ginea pig for unproven productis can be very costly if they don't meet your expectations however if they do work your build will be the one that will set the bar and make others wish that they had taken a gamble as well.
Good luck
Make your discission based on your research and proven results like dyno figures and track times and not on someone's personal opinion or vested interest. There are a number of great brands out there at present so have an open mind when you do your research.
If you can find results that have been duplicated on a number of different builds there is a good chance it will work for you as well.
Being a ginea pig for unproven productis can be very costly if they don't meet your expectations however if they do work your build will be the one that will set the bar and make others wish that they had taken a gamble as well.
Good luck
Trick Flow 245's or even 265's.
You cannot beat a 245cc cathedral port head that flows 355-360cfm on the intake and over 290cfm on the exhaust with a pipe(would you ever run your cylinder heads without headers?
)
I saw a flow chart for a set of worked over TFS 265's the other week that hit 401cfm on the intake and well over 300cfm on the exhaust. You will never find a LS3 or LS7 head that can attain the I/E% a TFS cathedral port can(or any cathedral port for that matter).
All out intake flow isn't the end all be all you have to get it out the exhaust also. A well balanced head with port velocity and a long intake runner manifold can make some serious power for a 440 cubic inch motor.
You cannot beat a 245cc cathedral port head that flows 355-360cfm on the intake and over 290cfm on the exhaust with a pipe(would you ever run your cylinder heads without headers?
) I saw a flow chart for a set of worked over TFS 265's the other week that hit 401cfm on the intake and well over 300cfm on the exhaust. You will never find a LS3 or LS7 head that can attain the I/E% a TFS cathedral port can(or any cathedral port for that matter).
All out intake flow isn't the end all be all you have to get it out the exhaust also. A well balanced head with port velocity and a long intake runner manifold can make some serious power for a 440 cubic inch motor.
Thread Starter
TECH Apprentice
Joined: Aug 2010
Posts: 333
Likes: 0
From: Mexico
Try Googling both heads and look at the results for each.
Make your discission based on your research and proven results like dyno figures and track times and not on someone's personal opinion or vested interest. There are a number of great brands out there at present so have an open mind when you do your research.
If you can find results that have been duplicated on a number of different builds there is a good chance it will work for you as well.
Being a ginea pig for unproven productis can be very costly if they don't meet your expectations however if they do work your build will be the one that will set the bar and make others wish that they had taken a gamble as well.
Good luck
Make your discission based on your research and proven results like dyno figures and track times and not on someone's personal opinion or vested interest. There are a number of great brands out there at present so have an open mind when you do your research.
If you can find results that have been duplicated on a number of different builds there is a good chance it will work for you as well.
Being a ginea pig for unproven productis can be very costly if they don't meet your expectations however if they do work your build will be the one that will set the bar and make others wish that they had taken a gamble as well.
Good luck
thank everybody for replying, every advice is considered before making the choose.
TECH Regular
Joined: Aug 2003
Posts: 483
Likes: 0
From: Texas
Trick Flow 245's or even 265's.
You cannot beat a 245cc cathedral port head that flows 355-360cfm on the intake and over 290cfm on the exhaust with a pipe(would you ever run your cylinder heads without headers?)
I saw a flow chart for a set of worked over TFS 265's the other week that hit 401cfm on the intake and well over 300cfm on the exhaust. You will never find a LS3 or LS7 head that can attain the I/E% a TFS cathedral port can(or any cathedral port for that matter).
All out intake flow isn't the end all be all you have to get it out the exhaust also. A well balanced head with port velocity and a long intake runner manifold can make some serious power for a 440 cubic inch motor.
You cannot beat a 245cc cathedral port head that flows 355-360cfm on the intake and over 290cfm on the exhaust with a pipe(would you ever run your cylinder heads without headers?
) I saw a flow chart for a set of worked over TFS 265's the other week that hit 401cfm on the intake and well over 300cfm on the exhaust. You will never find a LS3 or LS7 head that can attain the I/E% a TFS cathedral port can(or any cathedral port for that matter).
All out intake flow isn't the end all be all you have to get it out the exhaust also. A well balanced head with port velocity and a long intake runner manifold can make some serious power for a 440 cubic inch motor.
