Difference between ported heads...
03-22-2006, 09:09 PM
#1
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Difference between ported heads... What is the difference between lets say a patriot head and an AFR head as far as porting goes? There both ported, so what makes the more expensive head so much better?
03-23-2006, 08:11 AM
#2
Originally Posted by THE LAST Z
What is the difference between lets say a patriot head and an AFR head as far as porting goes? There both ported, so what makes the more expensive head so much better?
03-23-2006, 09:22 AM
#3
The budget heads start off as factory castings. Because of this, they work along the limitations of what a factory head can do. Any porting generally makes the runner volume big and drops the airspeed (velocity) of the head, which reduces throttle tip-in response and low speed torque.
Aftermarket heads like the AFR 205s were designed and manufactured just like a serious head-porter would make them: Raised roof, better short turn radius, better bowl/throat design, much better more efficient combustion chamber design that allows higher compression with lower octane fuel, etc. When you start with a clean sheet, you can eliminate many of the compromises the factory had to incorporate into their heads. More power, better torque, better throttle response and better fuel economy are many of the benefits the AFR 205s have over the factory-based budget heads.
Aftermarket heads like the AFR 205s were designed and manufactured just like a serious head-porter would make them: Raised roof, better short turn radius, better bowl/throat design, much better more efficient combustion chamber design that allows higher compression with lower octane fuel, etc. When you start with a clean sheet, you can eliminate many of the compromises the factory had to incorporate into their heads. More power, better torque, better throttle response and better fuel economy are many of the benefits the AFR 205s have over the factory-based budget heads.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
