top of page

Bosch ZEA & ZEB
2-Plunger Fuel Injection Pumps

The dawn of fuel injection

Bosch fuel injection pumps provided increased performance, fuel efficiency, cleaner emissions and more control over the performance of the pump in relation to the engine, allowing minute adjustments to improve overall performance.

 

While designs advanced at a rapid pace throughout the decade, earlier pumps like the ZEA R3 (pictured) still marked a vast improvement from carburetors and were used by Mercedes-Benz on their luxury models as early as 1958. The R3 was first used in coupes and cabriolet variants of high-end models such as the W128 220SE "Pontons" from 1958-1960, and early W111 220SEbs.

DSC_5076.JPG
DSC_5178.png
DSC_5177.png

EP/ZEA 2 KL 75 R1: Feb 1958-Feb 1959

EP/ZEA 2 KL 75 R2: March 1959-June 1959

EP/ZEA 2 KL 75 R3: July 1959-Dec 1959

ZEA MODEL DATES

DSC_5081.JPG
DSC_4928.JPG
DSC_4935.JPG
DSC_5094.JPG
DSC_4939.JPG
DSC_5784.JPG

The ZEB model was first released in June of 1962 with the R11 and the R13 and featured a number of improvements from the ZEAs. Various mechanical adjustments include modified pressure valves and increased idle performance. Obvious differences include the replacement of black oxide plating with more resilient zinc plating and the reduced size of the corrector assembly extending from the right-upper-portion of the pump on the R3 allowed easier access to the governor, better idle control and more room for install and removal of the pump.

INFO TO COME

ZEB MODEL DATES

DSC_5079.JPG
DSC_5816.JPG
DSC_5825.JPG
DSC_5809.JPG
DSC_5814.JPG
DSC_5812.JPG

Learn More About Fuel Injection Pumps

bottom of page