losing boost in my gze

[waxer52]

here is my problem. when i'm driving hard i reach 5,500 rpm and my boost guage reads 12psi. at this point it starts to tail off down to about 6 psi. is this the knock sensor retarding the timing or is it the same problem that all gze's have. the car is an ae101 levin with no mods except oversized crank pulley and abv mod.

[punter]

As seen here:
http://www.twincam.org/forums/index.php?showtopic=17405

[waxer52]

ok there seems to be a bit of a difference of opinion on this topic. i posted the same question on another forum and this is the reply, http://www.zerotohundred.com/newforu...ad.php?t=73415