rustystud
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That's also a reason I went with the fuel shut-off valve. Those full air shutoffs can damage the engine ie: blown gaskets even busted manifolds. Remember the engine is still spinning over 2600 rpm's (usually the rpm when you pull the trigger and stop a runaway) so it will take awhile before it spools down. During this time it is still trying to suck in air at a rate of around 800cfm's . That's quite a vacuum cleaner ! So if I have a runaway because the injection pump is acting "wonky" I don't want to cause anymore more damage to my engine shutting it down. Of course in the worst case scenario it is better to replace blown gaskets or manifolds. So a mix of fuel shut-off valve and air shutoff would be the best.I like the K.I.S.S. method.
Now it's all fine in theory. I'm not willing to kill all of my intake manifold gaskets to test my theory.
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