Dumb Question.....

[Atari007]

Sigh... ok, here is a dumb little question for ya.... exactly what is a boost spike??

 

[Blixx]

A spike occurs when there is lag between the time your turbo makes the desired boost and the time the wastegate is opened to maintain it. The lag allows the turbo to spool more air than is intended, but only until the wastegate opens fully.

For instance; When I first installed my TurboXS MBC I hooked the lines up incorrectly, I had a fat hose from the boost source to the controller and a skinny stock hose from the controller to the wasegate. The skinny hose was slowing the air enough so that it took an extra second for the wastegate to open, causing a momentary "spike" in boost.

Blake

 

[assa 98gsx]

I installed my Hallman MBC with the fat hose from the boost source and the skinny stock hose to the wastegate nipple... I haven't noticed any boost spikes, but the MBC won't hold 15 psi pass 5k rpm, is that correct?