Quote:
Originally Posted by Paul Workman
The obvious advantage to doing what you have done (used a modified bolt to hold the SPTs open) or a zip-tie as many have done, is the ease at which it can be reversed at a later date.
However, maybe for the sake of discussion, in my research on laminar flow and reversion caused by obstructions, I opted to remove the SPTs and the throttle rod entirely and plug the (now) empty bearing recess with a (Dorman) freeze plug. Admittedly, I have no "before and after" data to document the improvement to be had by so doing - that and extending the tapering of the IH runner down to the injector boss - but intuitively I feel it helps (just like smoothing the outside radius of the curves in the intake runner has in the porting fundamentals).
But, increasing the porting modification beyond 36mm (in one fashion or another) has been shown to be beneficial to many of the porting schemes (including mine which are now @ 37.5mm).
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I don't disagree, but if the goal is to allow for reverting to stock, I would do what Perry did. if the goal was max power and I was porting, then yes remove them cause once you port those butterflies will not do their intended function