IP Full Load Adjustment Procedure for the MW and M pumps

Superturbo

1,627

11-19-2016, 06:19 AM #226

hello tobulus,
we can make a trade , the knowledge for VE´s edc VP´s or whatever electronic pump u have , for the mechanichal rsf governor.
Most M pumps with mech governor are 5.5mm injection elements, wich difer in part number from pump to pump, being the ones that can inject the max quantity those found in the 602/3 turbo engines.
The diference from a VE 10mm injection head is the overall output, thats why usually people with the rotary style pumps end up with enough fuel. As a comparison a stock 10mm VE found in most TDI with the right Cam plate will inject something around 90cc when tested against 210bar injector tester, when moving the ring to the max position, well the M pump found in the 602 turbo engine with the 5.5mm will at most inject 60cc (605/6 use 65cc max in stock config) with full rack movement, 18/19mm (it is possible to achieve 21mm rack travel) for the same conditions.
Usually i built M pumps with 7,5 and 8mm elements able to pump as much as 200cc and in this case fuel is not such a problem, on the other hand i can only build 12mm VE´s at 140cc , and with a lot of magic tricks behind.
Another matter u must adress is the engine size, a MB engine is a beast compared to a Audi 2.0 or even a v6, so with the right tune, MB will be tunable far twice just by adding fuel.

Your problem rely on the Pump element , no mater the screw u turn that pump u have will never be able to inject 90cc which is the minimum u need in the 606 to turn it alive, real alive.
Basically u have 2 solutions : keep that pump maximised, or send it to someone to rebuilt it with wider elements.
To maximise that pump u can remove the throtle stop screw(outside the pump, is the physical limit of the lever)then u open the governor and unscrew all way out the secondary throtle spring.
unscrew all the way out the rack control screw. then u must start the engine without the side cover , watch the rack behaviour , only with this mods it should ride the the total travel rack travel when u push the THR to max position, if not screw in the tq capsule, but never loose controll of the tq capsule initial position.
probably it wont idle well after that but that can be treated later on. it will spill oil , but nothing special.
(remember once the rack travels full travel pump is maxed out as much as u can without the bench tester)
anything else PM me.

barrote