The Two Plunger Bosch EFEP 385A
Our dedicated TWO plunger bench
This 385A is same model as our other 385As, but has been specifically set up for 2-plunger Bosch fuel injection pumps commonly seen in vehicles like the W128 220SE, W111 220SEb, and the W112 300SE.
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While the pump itself only has 2-plungers the vehicles still have six injectors, requiring each plunger to feed fuel to three injectors at one time. Through some special modifications including a mounted rack, we can easily exchange injectors to test working condition and rearrange the order in an attempt to equalize fuel distribution.
![DSC_4922.png](https://static.wixstatic.com/media/1a477b_1f72c3751bfe4dd484c271247ad7cde2~mv2.png/v1/crop/x_732,y_0,w_2776,h_2983/fill/w_440,h_473,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/DSC_4922.png)
![DSC_4953.JPG](https://static.wixstatic.com/media/1a477b_b87cdb06c18243d28367a09bad1d571d~mv2.jpg/v1/crop/x_33,y_0,w_3861,h_3058/fill/w_475,h_377,al_c,q_80,usm_0.66_1.00_0.01,enc_auto/DSC_4953_JPG.jpg)
While these pumps are more difficult to calibrate and allow less control throughout the process, our 2-plunger bench setup ensures that we will detect performance issues while providing a simple and relatively quick method of testing different injectors, injector lineups, or change focus to the internal workings of the pump if needed.
![](https://static.wixstatic.com/media/1a477b_110aced5ae114a81ac80fe4457effae3f000.jpg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/1a477b_110aced5ae114a81ac80fe4457effae3f000.jpg)
![DSC_4942.JPG](https://static.wixstatic.com/media/1a477b_aa76152e0bed498abd7cd67d12a48825~mv2.jpg/v1/fill/w_81,h_54,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/DSC_4942_JPG.jpg)
![DSC_4961.JPG](https://static.wixstatic.com/media/1a477b_b152b44fc2d045228c3f449ddc440360~mv2.jpg/v1/fill/w_81,h_54,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/DSC_4961_JPG.jpg)
![DSC_4946.JPG](https://static.wixstatic.com/media/1a477b_bd83af0f90dd43d5b1eb1f7efafbd86e~mv2.jpg/v1/fill/w_81,h_54,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/DSC_4946_JPG.jpg)
![DSC_4975.JPG](https://static.wixstatic.com/media/1a477b_efc38f5c2f784defaa1ab881fb50a466~mv2.jpg/v1/fill/w_81,h_54,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/DSC_4975_JPG.jpg)
![DSC_4979.JPG](https://static.wixstatic.com/media/1a477b_83cfb2403ae64a18a10232f149c76e3c~mv2.jpg/v1/fill/w_81,h_54,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/DSC_4979_JPG.jpg)
![DSC_4984.JPG](https://static.wixstatic.com/media/1a477b_a5d18a131f8b4e8ba9d4da0c0c224721~mv2.jpg/v1/fill/w_81,h_54,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/DSC_4984_JPG.jpg)