2mm mindre slag kan nog göra mer än man tror.
Finns en lång tråd på k20a.org om detta ämne, här är ett utdrag på ett svar som verkar rätt vettigt.
<!--QuoteBegin-Import Builders+--><div class='quotetop'>QUOTE(Import Builders)</div><div class='quotemain'><!--QuoteEBegin-->Advantages:
-Shorter stroke = less piston speed per same RPM.
-much Wider rod journals = more reliable to high pressures to avoid metal to metal. At the sacrifice of slightly more drag on the crank from the added oil.
-Since the stroke is shorter, it allows for a longer rod, giving you a more reliable rod angle. This doesn't make more power, but it creates less wear and tear on the rings.
-Since the rod angle is not severe, it puts less load on the walls o fthe cylinders, thus reducing "ovaling" of the sleeves. Using a FRM, or Nikasil liner thats very hard would be good, or the LA sleeves I use, because its very rigid and hard. Combined with the less rod angle, the cylinders will stay straighter for a longer period of time.
-it will breath better at higher RPM, thus making a flatter HP curve up higher, most likely giving you a better "average HP" in your powerband.
-its more fun to drive
-it will have better traction
-it will have better 0-60 times
-the torque curve will most likely be flatter and carry on longer.
Disadvantages:
-shorter stroke will sacrifice low end HP/Torque, as well as lower the displacement.
-Shorter stroke will tend to make the motor need to rev higher to make the same HP, thus costing you alot more money from all the parts required to make it work properly.
-transmissions will wear faster, because they are engaging at higher RPM's, as well as clutches.
-longer rod will not accellerate your engine as fast as a shorter rod because its not filling the cylinder as fast.
-with increased dwell time, you will have less valve to piston clearance.
-its expensive<!--QuoteEnd--></div><!--QuoteEEnd-->
Hela tråden hittar ni här: <a href='
http://www.k20a.org/forum/showthread.php?t=22125' target='_blank'>
http://www.k20a.org/forum/showthread.php?t=22125</a>
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