Quote Originally Posted by ChefJ
Yes. Depending on the spring in the wastegate and the turbo size and alot of other things you may get boost creep and you can minimize this with a manual boost controller.
really? explain to me how a manual boost controller or an electronic boost controller minimizes boost creep issues. you must understand what a WASTEGATE does to understand boost creep. you are way off

If you purchase a EXTERNAL WASTEGATE, you can buy different springs to determine what boost you want to run. a 5psi spring is 5psi, a 7psi is 7 psi an sor forth. Now, boost controllers can usually do DOUBLE the wastegate spring. so a 10 psi spring can USUALLY do 20psi.

on a stock motor , sure you could run a 5psi wastegate spring an use a manual or electronic boost controller to turn the boost up to say 8-10psi, no problem with that at all.

Manual boost controllers SUCK. they arent very accurate, and if you make an adjustment, you have to do a pull to see what boost your at. With an electronic boost controller, you can set it to a PSI and with an actuator an pressure sensor it dictates boost level based on your settings for you. much easier.

Manual boost controllers are usually underhood, so youll have to stop, pull over, pop hood, and turn knob. Electronic boost controllers you can make adjustments inside the car.

BOOST CREEP is usually by having too small of a wastegate or vacuum leaks or an improperly hooked up boost controller.

CREEPING usually happens because the wastegate cannot dump enough air fast enough. A turbo spins astronomically, if there were no wastegate it would do 100psi since it would spin faster and faster the more the motor revs or sucks in air.

Imagine putting a BIG turbo (GT42R)with a 38mm wastegate. THe turbo is going to spin and generate positive pressure aka boost. now, imagine how much air that big turbo is moving. you have a small wastegate. lets say you have a 15psi spring. when you get to the 15psi level, the wastegate has got to open an dump enough air out of the manifold to keep boost stable at 15psi. However, as i said before, the turbo keeps spinning faster an faster regardless since there is no way to physically slow the turbo down. Now that big turbo is forcing more air into the motor an overpowering the tiny wastegate, which means you cant dump the excess air, and the turbo free spins generating more boost. you now are going past the 15psi level, and your boost creeping.

make sense?