A-series engine build-up samples based on rumours, reports and sometimes dyno sheets.
Also see Performance and 1/4_mile_time_log
42 RWHP/69 engine HP A12 stock
75 RWHP A15 + overbore Port Polished 8500 rpm
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
154 RWHP A15 25 mm inlet restrictor 7500 rpm
160 RWHP A12 stock pistons, crank and rods stock and unmodified H89 head standard headgasket E85 fuel, intercooled Cam: 256Deg at .050 Turbo: GT2860R
214 RWHP A12 Turbo