What is the best practice for use of low boost fuel pressure pump for the IV-P TSIO 550 E?  Activate on take off or wait to a certain altitude?  I have been flying into Colorado Springs elevation 6,187 with density altitudes over 8,000 this summer and wonder if I should activate the low boost pump while  on the ground.

Shane Bangerter

89GG

IV-P

280 hrs