Straight vs helical cut oil pump gears

[Lunacy]

Well had my oil pump all ready to go, but after finding a set of early evo helical cut gears in the box of bits i got yesterday, i started wondering if there were any benefits of running one more than the other?
They are the same size and both fit in my front timing cover.
Any thoughts?

[fugazi]

Probably less noicey, but does it need to be? :)
Flow? Pressure?

Not better just different?

[Lunacy]

Probably less noicey, but does it need to be? :)
Flow? Pressure?

Not better just different?

Yeah the noise was only thing i could think of, and as this is a track car, i dont really care about noise :beer

[Adriano]

Ive actually seen the helical ones wear the oil pump housing, as they generate end thrust as they turn, wheras the straight cut ones dont

[Junkers]

I always thought that unique 'electric' sound of the sohc 4g63 came from those straight cut teeth.. keep em