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the dreamland vortex that this thread has produced
Yeah, sorry I dont think I have helped here. some genuine experience from racing A-12's when my dad had a clubman-
Yes you can get some good numbers out of them, but the best we ever saw, (dyno proven) was 50kw at the treads at 4700rpm, before a valve broke and ended the session (we had some harsh words for the engine builder after that one- pre existing crack that he had not noticed, you could tell because there was carbon down half of the crack and fresh metal where it had finally given way). It had a good flat torque curve and pulled hard up to 7500 so 75+kw peak *may* have been possible- BUT thre is no way you could have street driven it - twin 45 dellortos and fuel econ to match. Never got more than a season out of an engine either, and had one expire mid season..... oil starvation to one of the big ends- a combination of crank design and possibly poor dry sump design,and or oil pressure. we never got it sorted out.
A12's were a good bit of gear for the 70's but dont expect the power, economy and durability of a more modern performance engine like a 4-AGE or swift GTI.
Anyone beg to differ?
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