I agree that will help get the engine spooled up and into the usable RPM range
BUT
It won't help a base tune up that is not close to correct.
ex: 360, 10:1, 244 at .050 cam needed 24* initial and could have used a bit more.
It's a foundation thing... you don't generally build the framing and roof to a house then pour the slab and set it on the foundation. Pour your foundation, then worry about building the rest.
