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Have you considered the Tomei pump? I like the way that is designed, with spline drive and also rotor drive so the load is distributed equally on the gears.N1 pump with a twist![]()
Sorry i meant its the flat type drive, and has splines on the outer end too! I have been told they are one of the best pumps for the Rb26.
Have a look at the pictures of the Tomei gears, they have flat drive off the crank then have splines to drive the main rotor, its a very good design.
Tomei RB26 High Flow Oil Pump
The problem is not the N1 pump, the whole design is flawed. Tomei and Jun will break sooner or later his you hit the limiter or bounce on it. You cannot have no clearance like some people have mentioned on the various other forums because the crank harmonics will shatter the gear this way also.i don't see any reason to use an n1, either stock for a road car at upto say 500 hp tops and no drag racing/circuit racing or extended sump and tomei/jun pump and drag/circuit as much as you like.
but defo do not ever fit an uprated oil pump to a stock sump, i have seen the aftermath in my own motor spun all the bearings and scrap crank and rods, the jun pump was mint and went again just with an extended sump.
my motor did 20k+miles and is still going strong with a jun pump and trust sump extension running upto 8700 rpm and over 700 hp, imo buy a decent pump and trust sump and direct your thoughts to elsewhere in the build.The problem is not the N1 pump, the whole design is flawed. Tomei and Jun will break sooner or later his you hit the limiter or bounce on it. You cannot have no clearance like some people have mentioned on the various other forums because the crank harmonics will shatter the gear this way also.
I understand as an engineering point of view nothing is ever perfect nor 100% even in aviation.Nothing wrong with an N1 pump or even the Reimax gears, but when you are looking to push the level further that's when you start needing to look at alternatives.
An extended sump and Jun pump is not the answer to my needs, as this can easily fail too.
I am sure I ready the tomie pump uses a 2JZ set of gears so is effectively spline driveI understand as an engineering point of view nothing is ever perfect nor 100% even in aviation.
I remember reading about Rob from RIPS saying he uses the Tomei pump and revs his car past 9000rpm and hasn't had a problem.
Rob at Rips talks about using stock pistons crank and rods to 1000 bhp and it all works fine for him lolI understand as an engineering point of view nothing is ever perfect nor 100% even in aviation.
I remember reading about Rob from RIPS saying he uses the Tomei pump and revs his car past 9000rpm and hasn't had a problem.
Care to share what the twist is? :runaway:N1 pump with a twist![]()