Thursday

Oil Pump Dyno



Oil Pump Dyno
By Don Terrill (c)2005

You get your engine all together, get it in the car and then start it up only to find the oil pressure is either too high or too low.

Wrong oil pressure:

Pressure too low - Starved bearings, spun bearings, EXPLOSION.

Pressure too high - Lost power.

So, the engine is in the car and you want to change the oil pressure, now what? No problem if it's a dry-sump, but what if it's a wet-sump system?

The only answer is to not get to that point in the first place - make sure the pump is right when it goes in the engine. Here's the perfect tool and how to use it:
From Titan Speed Engineering, Inc.

One end of our pump-test tool mounts to your oil pump; the other is clamped into a bench vise. Simply lower your pump into a pan of oil, then utilize our drive spud to spin the pump clockwise with a 3/8- or 1/2-inch drill motor. Oil Pump Pressure TesterWe've provided a 1/8-inch NPT plug that is loosened to bleed out air. Once the Pro or Sportsman pump picks up pressure, just watch the gauge as you set bypass pressure by rotating Titan's 1/4-28 set screw either clockwise (to increase pressure) or counterclockwise (to decrease).

At the factory, we typically set the pressure 10 psi higher than what you'll want in the main oil gallery. Demand varies greatly from one engine to another; adjusting the bypass will compensate for all the variables that combine to determine the pressure differential between the pump and the main oil gallery in your particular powerplant.

Titan Oil Pump Tester
Of course, the best way to set pump pressure is to have a known pump, out of a similar engine, with a known pressure to baseline off. Just like saving old oil ring expanders, maybe we should start saving old oil pumps.

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