I remember Mike(Calesta) was talking about using a turbo for better fuel economy. Ever tried it? My brother's D15B8 took a crap(blown rings) and I'm thinking about rebuilding it for him. With that D15B8, he was getting roughly 52/40 mpg. Anyways, any comments or suggestions on the build? Here is the plan: D15B8 short block PG6 pistons P07(D15Z1 VTEC-E head) and intake manifold TL1000R Injectors(4-hole 220cc) Mercury XR2 turbo(too big?) CX transmission with maybe 96-00 DX final drive Converted P05 with Crome I should note that the compression is VERY high with the setup(12.71CR). Hopefully the squish combined with the pistons would help control detonation. This car will probably have to run off of 89 or 93, but I don't mind. Also, what about the injector position? Since the D15Z1 is a swirl type head, would it make sense to have the injector firing into one side of the port vs. both? I'm going for a lean-burn method here. And the turbo; I'm aiming for low levels of boost during part-throttle driving(0 psi/no vacuum), and a max boost limit of ~3-5psi. Combined with that compression...can the pistons take it? Then there's backpressure due to gasses building up to turn the turbine...would a "turbo bypass" that goes from the exhaust manifold to the dump pipe work?