Things to check on a modified Bosch

[Diggers]

If I've understood it right, the governer stops fuel at a certain rpm to avoid engine damage (and fun....)....the gov mod allows it to keep fuelling so you get a bigger rev band. Someone correct me.if I'm wrong as I'm currently doing an assignment on VE systems.

In principle, yes.

As engine rpm increases, centrifugal pressure is exerted against the governor. This then compresses the springs within the gov cradle, which in turn begins to limit the throughput of fuel within the pump..

When modifying the governor, a 'shim' is put into the main spring, which makes it much stiffer (some people even do solid). This means that when the same centrifugal pressure is applied at higher engine rpm, the governor resists this movement far more, and thus the fuelling is not decreased.

Why not just fit a stiffer spring instead of shimming the stock one I hear you say? Because finding one which would fit perfectly would be a pain.

There are other modifications which you can do to the governor assembly which Dan! and myself did to my pump, the credits of which I believe go to Dave (HA11). However these are top secret

Was that the tranny throttle/gov arm and cradle and gov you used? Slightly bigger isn't it

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