lets talk...mid lift airflow?
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lets talk...mid lift airflow? what doe sit do? more or less.....power under the curve? peak numbers? etc. i was told if i sent my tfs 215 heads out and had them done up to 225 specs for my 416 they would gain a good amount of mid lift airflow. im trying to decide if its worth it since when im actually racing it im nowhere near under the curve...its all in the upper rpms.
Dude I love your setup...SWEET... Call Tooley or TFS or both... They know those heads better than anyone. On a motor like yours I would think you would definitely pick up with bigger valves and runners......
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9 Second Club
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Joined: May 2005
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From: in your closet
i think it will just be bigger valves and opening the chambers. from what i have gathered the 215's measure at 219-220 on the runner and the 225's measure at 224. so i would prob leave those be.
what doe sit do? more or less.....power under the curve? peak numbers? etc. i was told if i sent my tfs 215 heads out and had them done up to 225 specs for my 416 they would gain a good amount of mid lift airflow. im trying to decide if its worth it since when im actually racing it im nowhere near under the curve...its all in the upper rpms.
older sbc's set up for drag love 230 runner heads and there not as efficent of a motor design opening those ports up over 230 would be a noticable change as long as you don't loose to much velocity the air has to still move fast for good response
Having the heads worked and going with a larger head are 2 different things. There is some bowl and combustion chamber work that can be done by hand that the cnc machine wont do in order to improve flow without sacrificing velocity which is what usually happens if you just open up the runners or stuff bigger valves in.
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Defining low/mid/ high lift might need some discussing......
I have heard some say that due to a zillion different ports and cams available that..... one could think of low lift area as being the lift from where the intake valve actually opens to TDC......That figure could be as small as
.say .020 lift at TDC on small economy cams to .300 + on giant cams....
Others may have a different idea of what each lift area might be defined as.....
Do you guys have any thoughts of defining these different lift areas ?
I have heard some say that due to a zillion different ports and cams available that..... one could think of low lift area as being the lift from where the intake valve actually opens to TDC......That figure could be as small as
.say .020 lift at TDC on small economy cams to .300 + on giant cams....
Others may have a different idea of what each lift area might be defined as.....
Do you guys have any thoughts of defining these different lift areas ?
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