Supertech "hi flow" vs "standard flow" intake valves
#1
Supertech "hi flow" vs "standard flow" intake valves
Valves for the Mazda Miata from HorsepowerFreaks
Towards the bottom, note there is a "std flo" and "hi flo" intake valve for the 1.8.
Anyone know the difference?
Towards the bottom, note there is a "std flo" and "hi flo" intake valve for the 1.8.
Anyone know the difference?
#3
I did the right thing and called 'em.
Nope, it's not the diameter.
The hi-flow valves have an back-cut face and undercut stem. This is what WE want. The std-flow don't have those, and are used for racing classes which don't allow "modified" valves.
The shorter length stems are an option on the +1 valves, because they tend to sink in the seat; these will typically require shorter stems so that the shims required are close to standard.
BTW they make shim under bucket lifters too. List price $22 each.
Nope, it's not the diameter.
The hi-flow valves have an back-cut face and undercut stem. This is what WE want. The std-flow don't have those, and are used for racing classes which don't allow "modified" valves.
The shorter length stems are an option on the +1 valves, because they tend to sink in the seat; these will typically require shorter stems so that the shims required are close to standard.
BTW they make shim under bucket lifters too. List price $22 each.
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