The spiking is on MSP #1574, the ebay wastegate I bought is set for 10-24 psi (despite the listing saying 8-12psi) so it runs higher boost than it should but it runs great otherwise. Outran a blue Mach 1 mustang yesterday like it was sitting still, dude driving it could not believe how hard I pulled past him and neither could I. MSP #1345 has an EBC so I have the boost set around 10psi, it runs about 9psi up to redline. It's confusing having two, especially when I am talking about both of them in the same post.
I was about to guess you were using a bleed valve from GFB or someone..