Tuesday, January 21, 2020

A Milestone, by Any Other Name...

Well, it seems that earlier this evening, in the year of our Lord 2020, I reached somewhat of a milestone.  With little or no fanfare, I finished the flow tests on the 1100th set of Harley heads which I have ported and flowed over the last 30 years.  And, as if to mark the occasion, it seemed that they flowed unusually well.  Well enough, in fact, that I took the extra precaution of checking the SuperFlow SF600’s calibration to confirm that the figures are in fact correct.  Funny how I have never gone so far as to check the calibration when a set of heads did not meet expectations (immediately back to the porting bench instead), but I have performed the ritual a number of times when the figures were suspiciously good.  

This set of heads happened to be stock Evolution castings with 1.900” intake valves – a time tested formula.  280 cfm @ .600” lift and 28 inch test pressure.  And yes they flow more at higher lifts, but face it, they will never see a cam larger so why brag about the higher lifts? As it turns out, performing the calibration was a bit of overkill, since checking the records for the last set of similar heads revealed nearly identical results.  Oh well - calibration is never a bad thing.
BTW, set 1101 is on the workbench and 1102 is in queue.


Anonymous said...

Way to go Gramps!!

larnnbbm said...

congrats LEE.