1. NISSAN Z31 & Z32 OIL PUMP DIFFERENCES
LISTED BELOW WILL SHOW THE SIMILARITIES AND DIFFERENCES BETWEEN THE Z31 & Z32 TURBO OIL PUMPS. THESE DIFFERENCES WHILE SIMILAR IN VIEW ARE VASTLY DIFFERENT DIMENSIONALLY.
OVERALL, THE ABILITY TO MODIFY AND IMPROVE ON THESE TWO ITEMS IS VERY DOABLE. EP RACING WILL BE DEVELOPING A HIGH VOLUME OIL PUMP FOR BOTH THE Z31 AND THE Z32. AS FOR NOW THE ONLY OPTION FOR AN IMPROVEMENT TO THE Z31 OIL PUMPS ARE HAVING THEM PORTED BY EP RACING.

2. OVERALL LOOKING AT THESE TWO OIL PUMPS SIDE BY SIDE SHOWS TO BE JUST A DIFFERENCE IN OVERALL SIZE. ALL IMAGES SHOWN THROUGHOUT THIS PRESENTATION WILL SHOW THE Z31 PUMP & PARTS ON THE LEFT AND THE Z32 PUMP & PARTS ON THE RIGHT.
FUNDAMENTALLY, THE TWO PUMPS ARE IDENTICAL IN HOW THEY OPERATE. IT SHOWS HERE THAT THE STYLE IN WHICH THEY BOLT TO THE ENGINE BLOCK ARE VERY SIMILAR AS WELL.
THE INTERNAL WORKINGS OF THE PUMPS VARY GREATLY DIMENSIONALLY.
BOTH PUMPS HAVE THE SAME AMOUNT OF WORKING PARTS.
BEYOND THAT THESE TWO PUMPS ARE VASTLY DIFFERENT AS WE GO ALONG I WILL SHOW HOW.

3. Z31 PUMP TOP & Z32 PUMP BELOW
LAYOUT IS THE SAME AS WELL AS OVERALL DESIGN

4. Z31 Inner Drive Gear Dimensions
- .739” Thickness
” Diameter Overall
- .493” Tall Gear Teeth
- .240” Inner Step Depth
” Inside Diameter of Inner Gear
- 25 Gear Teeth
- .220” Gear Teeth Spacing
Z32 Inner Drive Gear Dimensions
” Thickness
” Diameter Overall
- .360” Tall Gear Teeth
- .343” Inner Step Depth
” Inside Diameter of Inner Gear
- 28 Gear Teeth
- .255” Gear Teeth Spacing

5. More images of the Inner Gear Drive between both oil pumps

6. Z31 Outer Gear Z32 Outer Gear - .491” Thickness - 2.937” Diameter
- 31 Gear Teeth
Inside Diameter of Gear
Z32 Outer Gear
- .688” Thickness
” Diameter
- 34 Gear Teeth
” Inside Diameter of Gear

7. Cap screw to bottom of oil pump are the same between both oil pumps.
Misc Images w/ Specs
Z31 Oil Pump Specs:
.212” Thick outer cover plate
.505” I.D of gear drive hole
2.105” Oil pump spring length
.470” Diameter oil pump spring
.909” Oil pump spring housing height
.622” Diameter oil pump spring housing
.498” I.D of oil pump spring housing
Z32 Oil Pump Specs:
.272” Thick outer cover plate
.781” I.D of gear drive
2.260” Oil pump spring length
.484” Diameter Oil pump spring
904” Oil pump spring housing height
.627” Oil pump spring housing diameter
.498” I.D Oil pump spring housing
Cap screw to bottom of oil pump are the same between both oil pumps.