hi all, new to this site. but was told by a friend you all could help me out. i have dug out my old cap 231 with a super tigre 75 on it. i have a 12x7 prop on it. what would be the best 3d prop to run on this motor? thanks in advance

The Tigre 75 might be in between sizes for a great 3D prop. What I mean is a 14x4W is maybe a little small. i am not sure if it will turn a 15x4W like is used on a 90. Maybe a 13x6 APC is your best bet.

David

thanks ill give that a try today. after i take it up to blow the dust off it.

You might also try a APC 13X4W.

It depends on your exhaust. If you are using the stock super quiet / over restricted exhaust, then a 13X4W would work. If you have an aftermarket / less restricted exhaust, then it will swing a 14X4W.

Don't be afraid to try different props a wide prop doesn't mean better 3d any prop that lets your engine run like it needs to while giving enough thrust will work fine
I have a 52 magnum 4 stroke that can't turn a 13x4w but turns the 13x4 sport just fine but can't turn a zinger 13x4 it just bite muchs harder then the 13x4apc sport