That's not a hx35 in your pic.
I call bs that your vnt won't do it in the same situation.
I've seen stock trucks and cars with vnt turbos surge when they let off.
Sewing machine sound? Uh. I clearly explained what surge is.
Thanks for ruining my thread.
Oh and I can go from full boost on the street and let off and it won't do it.
Oh and notice it didn't "surge" the second time I let off? It's because there was less load on it and the engine didn't instantly drop rpm.
-Jesse
80 300sd hy35, front mount intercooler, w115 intake, rack limiter removed, Alda removed, full load turned up, boost, ebp, trans, pyro, egr delete, 3.5" exhaust, e-fan, 16x8 rims with, 245/50 tires, lowered, bilstien 5100's, 12" front brakes, 2.65:1 diff.
97 f250 psd 4x4, crawler
70 f250 390
83 Volvo 242, lots of mods
66 Volvo amazon
10 mistsubishi fuso service truck.