What exactly is a 3-angle valve job?
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What exactly is a 3-angle valve job?
Ive heard it used time and time again. but what is it exaclty, why do i need it and what does it do for my car?
thanks
thanks
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Re: What exactly is a 3-angle valve job?
three angles on the seat instead of the standard 1. better flow of air of course, due to the smoother air transition.
not gonna do much on a street car, unless other things are done to improve airflow also.
not gonna do much on a street car, unless other things are done to improve airflow also.
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Re: What exactly is a 3-angle valve job?
it was included wiht my new head, i was jsut w ondering wht it was gonna do for me
#4
Re: What exactly is a 3-angle valve job?
generally they're gonna need to do a valve job anyway to make sure that each individual valve sits right in its own little port... and since they're doing it anyway, mi'se well do 3 angles.
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Re: What exactly is a 3-angle valve job?
Originally Posted by steronz
generally they're gonna need to do a valve job anyway to make sure that each individual valve sits right in its own little port... and since they're doing it anyway, mi'se well do 3 angles.
its not quite that simple....but yes, most heads do benefit from it. a five angle is a BITCH to do, but a three angle one isnt too bad. adds a decent amount more time though.
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Re: What exactly is a 3-angle valve job?
I know three angle was the standard vavle job we did when I worked at a machine shop.
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Re: What exactly is a 3-angle valve job?
you learn new stuff everyday. anyone attending TCC for auto mechanics?
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Re: What exactly is a 3-angle valve job?
Maybe this picture will help describe it some? The top angle is 30, the blue angle is 45 and the bottom is 60.
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Re: What exactly is a 3-angle valve job?
Originally Posted by greygti
I know three angle was the standard vavle job we did when I worked at a machine shop.
what kind of head? was this a performance shop?
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Re: What exactly is a 3-angle valve job?
i know with 5 angles, on the dyno there is a slight, but noticeable difference found in the lower end. three angles is pretty standard unless you decide to lap the valves 'in' instead. the 3 angles helps to recondition the seats before hand lapping. just makes for good sealing and if there are pits in the valve seats, they will be removed or is a 'nice' discovery in order to do something about it while the head is off.