i completly understand the consepst or air to fuel ratio, i have 4 years of being a certified ASE and honda training. i just wanted to know if the dsm, mitsubishi, 4g63 turbo setup as in the 450 injectors, turbo manifold and 14b turbo has been put on an f22a honda engine. and as for tuneing, can the ecu be flashed for a fuel to air map that will suport 6 to 7 psi. so mr.host, you should read my first post, it clearly talks about using more fuel to support the boost. i look forward to your reply. thanks, chris