150cc (400hp) DB2 Injection Pump Rebuild
The 150cc db2 is the next step in our performer series pumps, and offers all the same features of a stock pump, with the heavy duty upgrades that our performer series get to handle more than double stock fuel displacement. Built with our 4000 rpm governor spring, custom delivery valve, proprietary locked advance design, ported fill and discharge ports and our stroker cam ring, this .330" plunger sized db2 retains the same flat fueling curve of the smaller street pumps, with 150cc fueling flat across the entire rpm curve, reducing egts compared to other 150cc pumps which run 30-50cc more peak fuel than hp fuel, creating a smokier, hotter running pump for the same amount of produced power. Capable of over 400hp and 800 ft lbs with an upgraded turbo and intercooler.
All Classic Diesel Designs' DB2 injection pumps are built to and exceed oem specification. All pumps are built with a new advance piston, balanced metering valve to reduce side load and stickage issues, low lubricity spec tool steel blade set and transfer pump liner to reduce wear with modern dry diesel, high torque shutoff solenoid, viton material grade seals, updated delivery valve, delivery valve stop, and low lubricity grooved plungers.
See Stanadyne service bulletins: S.B 60R8, S.B.108RlO, S.B.125R5, S.B. 304R8 S.B. 334R1, S.B. 373R1.
A common issue with the design of the DB series rotary pump is rapid wear of the advance piston bore due to the hardened piston sliding in the aluminum bore quickly eroding the critical tolerance due to lack of lubricity of modern diesel fuel. Most cheaper rebuilds ream out this bore and fit a larger piston, but this is just a temporary fix and soon the hydraulic advance will be out of spec, resulting in a lack of power, high egts and a smokey exhaust.Our solution is to mill out this bore and install a ceramic sleeve. This ceramic sleeve allows us to create a better fit than with the original design, and shows no wear after over 100k miles, extending the lifespan of the pump, and maintaining the same out of box performance many years down the road.