I have noticed all the good BNZers stay almost on top of me whenever they come zoom up after a pass.
As of late I've been extending my opponents out to neutralize their altitude advantage, if their in a slower ride ill split S back into them once I have sufficient separation.
Do any of you guys have much success with this method?
Yes.
Naturally a slower plane will have a harder time BnZing a faster plane if the defender uses that speed to extend after a pass, as a slower plane will have difficulty staying on top of a faster plane. That is why faster planes are often used for BnZ, because they are much better at it.
WRT to using the Split-S maneuver, it all depends on how close the con is when you are turning back into him and what your relative E-states are. With a Split-S, you are giving up a good deal of altitude to gain speed and make a 180-degree turn. If you are already faster, why gain excess speed in exchange for losing altitude against an already higher con? The only time I think that would be best is if you know you will carry all of that excess speed into the first merge AND that allows you to zoom above him at the merge. To be consistently effective, that likely requires less alt separation, fairly precise timing along with an unwary or overaggressive con.
The advantage you have as the extending faster plane is YOU get to decide when to re-engage, so if you provide yourself ample turning space, the pure Split-S isn't really necessary, IMO. Here again is where patience and timing come into play.
Generally speaking, I tend to prefer more E-conserving turns (like yo-yos) over the pure Split-S. The beauty of the yo-yo is you can choose the angle (or adjust the angle during the turn) as needed, for example starting with a high yo-yo to turn tighter initially and dipping into a low yo-yo to gain max speed prior to the merge, all while maintaining the same starting alt. You may need more initial separation to execute this, but as the faster plane, you control that separation and you decide when to engage.
<S>
Ryno