Ive been researching the Ecutout system for turbo apps, and after reading most of the threads on HT regarding the cutout it seems that some people have been having trouble with boost spike when the cutout is open, typically between 1-3 psi. I plan on going with the Greddy kit for my LS, and have heard when the boost is raised on these kits at 10+ psi, spiking is an issue as well.

Is it likely that I would experience spikes using the cutout system? And combined with the internally gated 18g turbo, would it be dangerous to run the Ecutout system on the Greddy kit?

If in fact it did spike, what would be most likely to fix it?