6-cfm x-tra in head flows
Didly squat.
The LS6 manifold will limit both of the heads to around 280, but the flow numbers themselves won't determine the better performer. Port velocity will probably mean more. Besides, alot of posted numbers are for advertising purposes only and even if they are accurate and honest readings, every flow bench will read different so 6 cfm is negligable.
To put this into perspective, my car runs high 10's NA stock shortblock with only 275-280 cfm intake ports and stock valves.
The LS6 manifold will limit both of the heads to around 280, but the flow numbers themselves won't determine the better performer. Port velocity will probably mean more. Besides, alot of posted numbers are for advertising purposes only and even if they are accurate and honest readings, every flow bench will read different so 6 cfm is negligable.
To put this into perspective, my car runs high 10's NA stock shortblock with only 275-280 cfm intake ports and stock valves.
Originally Posted by xsmph
How much horsepower do you guys think 6 cfm of x-tra flow is worth on a ported head.
Say 300 cfm vs. 306 cfm?
Thanks!
Say 300 cfm vs. 306 cfm?
Thanks!
Teching In
Joined: Oct 2003
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Originally Posted by Jantzer98SS
Didly squat.
The LS6 manifold will limit both of the heads to around 280, but the flow numbers themselves won't determine the better performer. Port velocity will probably mean more. Besides, alot of posted numbers are for advertising purposes only and even if they are accurate and honest readings, every flow bench will read different so 6 cfm is negligable.
To put this into perspective, my car runs high 10's NA stock shortblock with only 275-280 cfm intake ports and stock valves.
The LS6 manifold will limit both of the heads to around 280, but the flow numbers themselves won't determine the better performer. Port velocity will probably mean more. Besides, alot of posted numbers are for advertising purposes only and even if they are accurate and honest readings, every flow bench will read different so 6 cfm is negligable.
To put this into perspective, my car runs high 10's NA stock shortblock with only 275-280 cfm intake ports and stock valves.
I agree, 6cfm peak isn't really going to make a difference if you are comparing two different heads, done on two different benches.
I think people get too caught up in peak CFM numbers. flow under the curve and cross section area (velocity), are FAR more important. 300cfm if done right, is enough to support 600hp NA. its all about the combo!
