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If ur going that route, u got some hoses to block off and holes to put epoxy on....do the whole smog deletion in this case. Pump, hoses, egr valve, plate and sensors. It will make a difference with all this done.
you can just unplug the vacuum hose connected to it at the strip and this will keep it closed while you race. remember to plug the hose too. golf tees work good for this.