Originally Posted by skires
... back to Rob's initial spec question ...
The main 77 of mine that I see the shift with is all 25mm internals and V-Mach spring / guides / seal and still has the original Transfer Port of 2.9mm.
The Bigtoe style 77 has 25mm internals and a V-Mach spring and seal ... but custom made guides ( rear one fits inside rear block ) and has the TP opened up to 3.8mm. Not seen any shift in that but it's not had that much put through it.
That TP help settle 'repeatability' re bounce/surge?
Interesting point, but I bet Kyles 97 has a 2.9mm port as well.
Perhaps Kyles doesnt shift because hes had the stock custom made to him, and its very very heavy?