Alrighty thanks MBHD. The reason why I was lookin at the external wastegate is because I've heard that internal ones are prone to boost creep. It just seemed easier to make it external. Is that a valid worry? How would I change the pressure that an internal wastegate opens? Does it use springs like a external?

Also, do you have any idea what an the stock mech. pump fuel pressure is?


69 Buick Special Deluxe. Intercooled Turbo Chevy 250 @ 15psi on a stock long block. It's kinda fast.