sorrowfulkiller

I'm looking to build a bolt on scavenge pump for an SR20DET with either a p11 or GTiR oil pump gearset as the pumping mechanism. I'm starting my first year of mechanical engineering so once I learn a bit of the basics I should be able to make something fairly easily.

The plan is to have a bolt on piece that sits right where the ac compressor would sit normally. Since I'm sure many of your swapped cars don't have ac compressors I doubt it'll be an issue. I'm also planning on making them stackable. So once I get my design down and working correctly I may start having someone manufacture these, so you may be able to buy a relatively cheap dry sump pump made from factory gearsets within the next 2 years.

I'm doing this because my sr20det is going in a lotus 7 "kit car" I'm building from scratch and since the SR is such a tall fucking engine I need to drop around 3 inches from the bottom of the pan, my plan is to make a semi-dry sump. Using the factory pump as the pressure pump and a GTiR based scavenge pump to scavenge the "pan" into the aerator/holding tank. From the Oil tank it would go through a ball valve (to stop oil flow when shut-off) and down to a welded on fitting on the upper pan which would be directly connected via a metal tube with 2 AN fittings on it back to the stock pickup. With this setup there should be absolutely no time whatsoever that you should lose oil pressure. Worse comes to worse I can always pull the gears out of the stock pump and stack another pump to the scavenge pump as a pressure pump. Either way should work.





I'd like to ask for some help in finding a place to buy some GTiR pump gears, inner and outer, so I can start designing said pump. Worse comes to worse I'll design my own gerotor pump and use that. I would much rather base everything off of the stock pumps though.

jakemkz

Sounds like a neat project. As far as I am aware the GTI-R oil pump is a one-model design. I have checked the FAST parts database for you and found the following part numbers:

15020-54C00 - Rotor Set, Oil Pump (consists of inner and outer gear)
15021-54C00 - Inner gear (aug. 90 to aug. 92)
15021-54C01 - Inner gear (aug. 92 or later)
15023-54C00 - Outer gear

I checked for interchangeability and alternate applications of the same parts but found none. Under 15,000 GTI-R were made, with the newest one being just about 20 years old so it may be difficult to source these parts (particularly in any kind of quantity). The only reputable source I came across was FRSport, but they are only selling the front cover assembly for the GTI-R which is about 10 times the price of the pump.

The P11 pump may prove an easier part to source, unfortunately the only engine that lists PNs for the pumps is the SR20VE (Sep. 97+).

15020-1N501 - Rotor Set, Oil Pump

This part number is used in quite a few applications mainly in the SR20VE but also in the SR16VE in the B14 and B15 and the YD22 and YD25 diesel engines in cars like the U30 and Y11. I haven't seen much of a supply of these in the US though.

A better option may be a pump from a US market SR such as the SR18DE in the B13:

15020-53J00 - Rotor Set, Oil Pump

This pump is available readily from most Nissan dealers, Courtesy Parts has it listed for under $20. I'm not sure precisely what the differences are between these gear pumps. Good luck with your project.

sorrowfulkiller

You my good sir are quite awesome.

Thanks very much for the information. I believe I will probably make my own gears for the pump now. I'm thinking of doing helical spur gears to ensure the pump is quiet in operation and easy to make in solidworks. I will of course have to use some gears I can get for some flow calculations of course so the information will be quite helpful.