Quote:
Originally Posted by NESW20
can you explain what about the A is so much better than the Z3? all you've said is that the A is better, and haven't given much to support it. i'm not looking to start a fight, but i'm curious why you like the A that much more than the Z3. :happy0180:
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The K20A isn't that different to the Z3. Actually the K20Z3 has a better intake manifold than the K20A2, so it's not the handsdown the "worst" of the K20s. Part of the reason why it feels worse is the DBW and the rev hang. Power-wise, balance shaft in the Z3 takes a small bit away, which is why the Si has slightly lower output than the RSX (but less low RPM vibrations, a complaint RSX-S owners have had).
K20A has finer sand cast ports, 11:5 comp pistons with less restrictive exhaust manifold and cat, different intake manifold. In short the K20A is hands-down the best, the rest of the ~200hp K20s are pretty similar.
Have they ever confirmed the FT86 using a variant of the FB20 engine? I just don't see the stroke/stroke-rod ratio being conducive to a high-revving, 200-ish hp N/A application. The main perk to long stroke engines is that the combustion chamber can be more compact, which makes for efficient combustion. Makes sense for fuel-efficiency minded cars like the Impreza, not so much the FT86.