Quote:
Originally Posted by ZDan
All I know is I tracked both of them (backups to my 240Z street track car) (totally stock and on mediocre UHP tires), and the S13 was fun to drive and engaging, the S14 was dull and the steering feel was nonexistent. In my experience they were both pretty neutral, but the S13 seemed to enjoy hanging the back end out a lot more. Fellow track-hound mentioned he'd never gotten a point-by from a car that was totally sideways at the time :P
Engine-wise, the earlier KA had different cams and had a lot more usable rpm headroom above peak power, up to 7200 indicated, where the later KA dies before its 6500 limit. It makes a big difference, at least it did to me.
S14 may feel more "stable and planted" to you, but it just feels less responsive and less fun to me.
I think it's a lot more to do with suspension tuning and bushing stiffnesses than the 97" vs. 99" wheelbase. But in any case I generally prefer shorter wheelbases. If the twins are more like the S14, all the more reason for me to keep DDing the S2000 
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The wheelbase of the twins is 101.2"... pretty long for these sorts of cars. The difference between the different KAs is minor. The newer one has better midrange. Either way, it's not a very exciting engine, which is why most turbo it or swap it.