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With my tax return I'm buying some aluminum heads to use on the 398 stroker im building. I think I've got it narrowed down to 2 different heads.
I initally thought I would just get some GT-40 "x" heads. They seemed to have worked good for other people. I got to doin some research on them and noticed that the exhuast vavles, and exhasut ports were a little smaller than some of the similar priced heads. And the intake ports were slightly smaller too.
So i got to doin some lookin and found these trick flow heads at summit. They seem better than the gt-40s and have the right size chamber (64cc) to keep my 10.5:1 CR.
Anyway heres the trick flows:
http://store.summitracing.com/partd...4294889096+4294867079+4294867005&autoview=sku
Intake Runner Volume (cc): 192
Exhaust Runner Volume (cc): 87
Intake Valve Diameter (in): 2.020
Exhaust Valve Diameter (in): 1.600
And heres the good ole gt-40 "x"s:
http://store.summitracing.com/partd...4294889096+4294867079+4294867005&autoview=sku
Intake Runner Volume (cc): 178
Exhaust Runner Volume (cc): 62
Intake Valve Diameter (in): 1.940
Exhaust Valve Diameter (in): 1.540
I am a true noob to building engines so maybe im missing something simple. They are virtually the same price, within a few dollars of each other. So which one is gonna be the better head?
This will be used on a 351w block with a 393 stroker cast crank, forged i beam 5.956 rods, forged -4.8cc flat top pistons, .060 bore for a total displacement of 398 cu in. 10.5:1 CR, carburated. Will move to fuel injection later on.
So what do yall think? Gacknar, i know you must have some input on this
Thanks for puttin up with all my noob motor questions
Josh
I initally thought I would just get some GT-40 "x" heads. They seemed to have worked good for other people. I got to doin some research on them and noticed that the exhuast vavles, and exhasut ports were a little smaller than some of the similar priced heads. And the intake ports were slightly smaller too.
So i got to doin some lookin and found these trick flow heads at summit. They seem better than the gt-40s and have the right size chamber (64cc) to keep my 10.5:1 CR.
Anyway heres the trick flows:
http://store.summitracing.com/partd...4294889096+4294867079+4294867005&autoview=sku
Intake Runner Volume (cc): 192
Exhaust Runner Volume (cc): 87
Intake Valve Diameter (in): 2.020
Exhaust Valve Diameter (in): 1.600
And heres the good ole gt-40 "x"s:
http://store.summitracing.com/partd...4294889096+4294867079+4294867005&autoview=sku
Intake Runner Volume (cc): 178
Exhaust Runner Volume (cc): 62
Intake Valve Diameter (in): 1.940
Exhaust Valve Diameter (in): 1.540
I am a true noob to building engines so maybe im missing something simple. They are virtually the same price, within a few dollars of each other. So which one is gonna be the better head?
This will be used on a 351w block with a 393 stroker cast crank, forged i beam 5.956 rods, forged -4.8cc flat top pistons, .060 bore for a total displacement of 398 cu in. 10.5:1 CR, carburated. Will move to fuel injection later on.
So what do yall think? Gacknar, i know you must have some input on this
Thanks for puttin up with all my noob motor questions
Josh