Good Day,

Looking for advice on my rebuild with regards to oil pump selection. I’m planning on performing the oil bypass modification on my 2.2 case and am torn between using a 964 oil pump that I have or just sending my original oil pump that works fine to Glenn Yee and have it rebuilt/optimized.

I have read lots of threads with conflicting information regarding oil pump selection and apparently most say to use a 930 pump or Carrera pump, but it sounds the 964 pump is also used in some builds.

The engine will be the following set-up:
2.2 case with 87.5mm nickies and 9.5:1 CR for a displacement of ~2.4 liters
IDS Weber Carburetors
DC40 (mod s) camshafts
Upgraded ARP connecting rod hardware (or Pauter Rods)
ARP case bolts and cylinder head studs with case savers
Cylinder mooning, boat tailed webbing and knife edge crank
Counterbalanced crankshaft from a 2.2E/S
Oil bypass modification and all other “standard” machining of case
Cylinder heads ported and polished to 36i/35e “S” specifications and upgraded valve springs for more aggressive cam grind and to help safeguard a “missed shift” scenario
SSI heat exchangers to an M&K Sport exhaust
Distributor recurved for DC40 cam
Expect 4,000-6,500 rpm as optimum range and setting redline at 7,200 or maybe a little higher.

Do I go with the 964 oil pump or keep my original and have it tuned up???

Thanks for your advice.