The second question was rhetorical (for the most part)... especially since I don't want to buy a new TR6 pump just to cut on it. However, being a bit anal, I laid the two pump body bolt patterns out in CAD so I could superimpose them. The mounting patterns are close but different. It would be possible to modify the TR6 pump body to fit the 4-cylinder if the perimeter of the 6-cylinder aluminum housing is not "too big" to fit properly against the 1500's block.
Now that I know the idea is to press the shafts in/out of the inner rotor I can start the conversion process using the parts I have. As with most my projects, starting one project requires another task be carried out first. In this case I have to do a bit of work on the drive belt pulleys on my mill before thinking about cutting any metal.
Steve said he did not notice any really change in the oil pressure when he ran these pump conversions. The rotor length difference should equate to a 30% increase in flow using the 6-cylinder pump parts. However, I anticipate that if the relief valve is working properly you aren't going to see that increased flow as pressure. You would have to have excessive wear and/or large clearances like our 1500 to see any change in oil pressure with these larger/longer pump rotors.
Doug L.
--Previous Message--
: Yeah Steves picture brought back some
: memories, not all that good...!
: The shaft is pressed, possibly pinned,
: depending on manufacturer.
: Your second point, I haven't done it so
: can't speak from experience, but it
: sounds like an option. If swapping end
: covers though, I would make sure that
: the ports are in the exact same
: location.
: Glen
:
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