I think the point to take away is that the std manifolds are crap for anything over 350rwkw and definately do not improve response over the chinese ebay stainless mainfolds
517Z's, 2860R, HKSGT2530@24psi and my 2860R on std manifolds@26psi
At 95km/h, 85kw 95kw 90kw 85kw
At 112km/h, 105kw 140kw 130kw 130kw
At 128km/h, 155kw 240kw 200kw 200kw
At 145km/h, 255kw 305kw 296kw 317kw
At 160km/h, 330kw 325kw 315kw 350kw
At 178km/h, 360kw 350kw 355kw 361kw
At 194km/h, 365kw 358kw 372kw Chart stops
I do have a chart that keeps going and power drops off after 178km/h as does boost also....down from 26psi to 24psi at 200km/h The drop in boost starts at 169km/h at the 350kw mark. The 2530's with the stainless manifolds did not drop boost at all.
Full Boost is also made at identical points compared to the 2530's (134km/h)