84gmcjimmy
1 ton status
What is the difference between oval ports and retangluar ports? Is there an advantage for either one? Thanks 'all
CK5
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Cylinder Head question...
- Thread starter 84gmcjimmy
- Start date
big83chevy4x4
3/4 ton status
they are on the big blocks, oval ports are.....well, oval, and rectangular ports are..... retangular /forums/images/graemlins/doah.gif
im not sure on the performance aspect, but oval seem to be more desirable, for cars though /forums/images/graemlins/dunno.gif
im not sure on the performance aspect, but oval seem to be more desirable, for cars though /forums/images/graemlins/dunno.gif
Z3PR
Banned
[ QUOTE ]
they are on the big blocks, oval ports are.....well, oval, and rectangular ports are..... retangular /forums/images/graemlins/doah.gif
im not sure on the performance aspect, but oval seem to be more desirable, for cars though /forums/images/graemlins/dunno.gif
[/ QUOTE ]Rectangular preform better in the higher RPM band. Oval tend to have better low end torque, or so it seams to me anyways.
they are on the big blocks, oval ports are.....well, oval, and rectangular ports are..... retangular /forums/images/graemlins/doah.gif
im not sure on the performance aspect, but oval seem to be more desirable, for cars though /forums/images/graemlins/dunno.gif
[/ QUOTE ]Rectangular preform better in the higher RPM band. Oval tend to have better low end torque, or so it seams to me anyways.
84gmcjimmy
1 ton status
So oval would be better offroad because of the low end torque?
Blazer1970
1/2 ton status
[ QUOTE ]
So oval would be better offroad because of the low end torque?
[/ QUOTE ]
Yes, definitely. The smaller oval ports provide for higher intake air velocity at lower RPMs, which improves torque. Rectangular ports (much bigger) are for high rpm operation at the expense of low RPM torque.
So oval would be better offroad because of the low end torque?
[/ QUOTE ]
Yes, definitely. The smaller oval ports provide for higher intake air velocity at lower RPMs, which improves torque. Rectangular ports (much bigger) are for high rpm operation at the expense of low RPM torque.
