Triton Thrasher wrote:There are modifications to be done, to use the rotary pump. You have to drill into the side of the oil pressure relief valve, so the excess oil squirts uselessly into the timing cover rather than building up excessive oil pressure.
That is, unless the rotary design has been modified lately.
If Eddie's a happy user, it can't be all bad, but I cannot see how it will improve your riding experience.
I was a very happy user TT, but it was not a normal road bike application. I suffered from overheating engines in race bikes, and, long story short, the Morgo rotary pumps solved this.
As you point out, the pressure relief valve needs drilling out to allow the extra oil to flow through it when it is open. This oil, as you say, is dumped into the engine, but its not useless, as it then gets splashed around the whole internals of the bottom end, remember that apart from the big ends (and timing side bush if still fitted) the rest of a Triumph bottom end is fed by splash. Increasing the amount of oil being splashed increases this lubrication and, more importantly, cooling.
As with any Triumph, the actual oil pressure is governed by the pressure relief valve. The rotary pump will basically ensure max pressure is reached at lower revs, and ensure it is maintained even in super hot conditions and even in a less than perfect engine.
When I used them, I also pressure fed the top end. The ensuing increase in oil flow through the head also aided cooling.
But, I did also say, in a normal road going engine, the stock pump is most likely just fine!