What impeller is recommended for my 15F ?.
I got my skattrak magnum pump 155 mm that I will install as soon as I get the right impeller. (it was a impeller to a SXR in the package!)
I have a ported engine with the Riva cams, pistons & ECU.
Please help me, Im going for closed course racing mainly.
Which impeller for best top speed?
Which impeller for best acceleration?

A 14/24 Swirl would be good to start with. You can always have it re-pitched if your RPM's are to high or low.