A-series engine build-up samples.
Also see Performance
42 RWHP/69 engine HP A12 stock
93 RWHP A12 IHI vj26 turbo 2.5 exhaust Factory EFI
99 RWHP A12 + overbore (1286 cc) mild cam A12 GX head Twin Dellorto 40s (32mm chokes) Extractors and 2" system
137 RWHP A12 14:1 compression 40mm dellortoes steel rods crank fire ignition
143 RWHP 8800 rpm redline A12 .040 overbore (total = 1204 cc) Ported head 40mm Webers competition cam and valve train
75 RWHP A15 + overbore Port Polished 8500 rpm
154 RWHP A15 25 mm inlet restrictor 7500 rpm