Quote:
Originally Posted by stevo585
Think about motorcycle engines (not harleys). They all are big bore, short stroke with individual throttle bodies. This allows for more airflow, bigger valves, and high rpms. This is what you need to make big NA power.
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Quote:
Originally Posted by dwx
Yeah not even just motorcycles, look at any high power high revving NA car. The Porsche GT3 uses a 102mm bore with a really short stroke, like 76mm. Only way you can rev the thing out to 8400RPM and make the kind of power they do.
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I highly doubt anyone will de-stroke and over bore the FA20. I guess you could run a FB25 block with its 94mm bore and a FB16 crank with 82mm stroke. That would give you 2.3lt roughly. The you could run the FA20 heads with oversized valves and some porting. But who knows if the FB16 crank would hold up to revs as well as the FA20s because it is built for economy not performance.
Would make for an interesting franken engine tho
