BOSCH PUMP VE GUIDES - Gov-mod.

[Dave]

Govnor modifying means you're removing the ability for the pump to resist your throttle action, which would normally happen on the spring. With too many shims the pump cant 'cushion' the effect of your right foot and will transfer all the force from your foot into the delicate leverset if not setup properly. Its like pulling a spring one way, and the pump pulling it back the other, and with modifying the govnor, this overcomes this force, but you dont want to overdo it where your foot action overcomes the amount of compression that would normally happen with a stock govnor spring, but you're making it unable to be compressed by shimming it.

Technically speaking, if you use a longer throw cradle then you dont even need to touch the govnor spring/shims etc, just purely pull it further to the point where its almost fully compressed. The govnor only compresses so far before its solid, its just as stock then its not far enough unless you do stuff like this and then set it up ...



So if gov modding, leave the convensional screws and find the limit of the pump, if you're not, then look into this ^