ACL B Series High Performance Oil Pump

ACL B Series High Performance Oil Pump

You're building a high-RPM B series and you need an oil pump that can actually keep up? The ACL high performance oil pump is designed for B series engines that spend time at high RPM where the stock pump starts to lose pressure. This pump flows more oil than the factory unit and it's built to handle the abuse of track days, drag racing, or sustained high-RPM use. If you're running a built motor with aggressive cams, high valve spring pressure, or you're bouncing off the limiter regularly, the stock oil pump's not good enough. You need something that maintains oil pressure when the engine's working hard. This pump does that.

Here's Why Stock Oil Pumps Fall Short

The factory B series oil pump works fine for a stock motor at normal RPM. Push the engine past 7,000-8,000 RPM consistently and the stock pump struggles to maintain pressure. The gerotor wears, the clearances open up, and you're losing pressure right when the engine needs it most. At high RPM, your valve train's moving faster, your bearings are under more load, and you need consistent oil pressure to keep everything lubricated. If the pressure drops, you're risking bearing damage or valve train wear. A high performance oil pump flows more volume and maintains pressure at RPM ranges where the stock pump gives up.

Precision Gerotors and Tight Tolerances

The ACL pump uses precision-machined steel-copper alloy gerotors. The gerotor's the internal component that actually pumps the oil. Tighter machining tolerances mean less internal leakage and more consistent flow. Cheap oil pumps have sloppy tolerances and they leak pressure internally before the oil even gets to your engine. The ACL pump's gerotors are machined tight so the pump moves the oil volume it's supposed to move. The housing's die-cast aluminum with an anodized finish to prevent corrosion. Aluminum keeps the weight down compared to cast iron and the anodizing stops it from corroding over time.

High Flow for High RPM

This pump's designed to flow more oil than stock. That matters when you're running high RPM or you've got increased oil demand from aftermarket parts. Aggressive cams with high lift and duration need more oil. Heavy valve springs load the valve train harder and require better lubrication. Turbo builds with oil-cooled turbos pull oil volume for the turbo feed. A stock pump might struggle to supply enough volume for all that. The ACL pump handles it. You're maintaining oil pressure across the RPM range instead of watching it drop off at high RPM.

Built to Last

The pump comes with a 12-month, 12,000-mile warranty. It's also been inspected and tested before it ships. You're getting a pump that's ready to install and built to hold up under hard use. It includes a new crank seal and O-ring so you're not reusing worn seals during installation. The pump fits all B series engines, OBD1 and OBD2, and it's got provisions for the crank position sensor if your motor has one.

What You Get

• ACL high performance oil pump for B series engines
• Precision-machined steel-copper alloy gerotors
• Die-cast aluminum housing with anodized finish
• Higher flow volume than stock oil pump
• Maintains oil pressure at high RPM
• Includes new crank seal and O-ring
• Fits all B series engines (OBD1 and OBD2)
• Provision for crank position sensor

Fits These Engines

• B16A, B16A2, B16A3
• B17A1
• B18A1, B18B1
• B18C1, B18C5
• B20B, B20Z

Note: Air in the oil system causes cavitation and you lose oil pressure even with a good pump. Prime the pump before you install it. Pour fresh oil into the pump inlet and rotate the gerotor by hand to distribute oil through the pump. That ensures the pump has oil in it when you first start the engine. If you start the engine with a dry pump, it takes a few seconds to build pressure and that's a few seconds where your bearings aren't getting oil. After you've installed the pump and started the engine, check your oil pressure immediately. You should see pressure within a few seconds. If pressure doesn't come up, shut the engine off and figure out why. Don't let it run with no oil pressure. The high performance pump flows more volume but it doesn't automatically fix oil pressure issues caused by worn bearings, clogged oil passages, or a bad oil pressure sensor. If your engine had low oil pressure before, diagnose the actual problem before you assume a new pump's going to fix it.