Engine and Transmission Tech

tips, technology, tools and techniques related to vehicle driveline components

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roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

While we're quoting head flows....
Posted by: roverman
Date: February 28, 2013 09:12PM

Seems like oem's performance, gets most of our attention. Many times, it's for good reasons, like bang per $. Case in point, the new "Apache" 6.4L hemi head. Stone stock it's rated int. flow is 340-352 cfm. @ .6" lift,( 2.155" dia. helps) A new, complete head sells for $450.+ $150 core charge,(yeah, it must be the new math). Boosted/built 6.4's are reportedly sustaining 1,300 rwhp.Did I mention, this is a "small block" ? Comparing to the smog choked dark days of 75', it appears the Big Three hp. wars, have recovered well. Faster-safer, roverman.



Edited 2 time(s). Last edit at 02/28/2013 09:26PM by roverman.


MGB-FV8
Jacques Mathieu
Alexandria, VA
(299 posts)

Registered:
09/11/2009 08:55PM

Main British Car:
1977 MGB Small Block Ford, 331 Stroker

Re: While we're quoting head flows....
Posted by: MGB-FV8
Date: March 02, 2013 09:50PM

Impressive numbers Art, probably has Chevy and Ford looking over their shoulders :)


roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: While we're quoting head flows....
Posted by: roverman
Date: March 05, 2013 01:04PM

No big mystery about these, the valves are inclined 18 and 15 deg., away from bores. With a 2.155 int. and a 1.65 exh. and virtually zero shrouding, it's easier to go-with-the- flow. roverman.
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