I custom fabbed my Celica and Talon with a short shifter setup as they just don't make any worth buying. Makes it very nice when normal driving as you can basically shift with just your fingers. I haven't found any negative issues "engine performance" wise with fast shifting from using short shifters...but as stated above, the tranny may not be able to catch correctly from disengaging and engaging so quickly. Once in, you will have to play with it and see how far you can actually go before you start grinding than you know your limits. Now if turbo charged as some of you are, the short shifter is not to be considered a performance mod in the terms of "How fast can I shift this biotch!!!" You can do some turbo damage in the long run due to closing off the BOV way too early from getting back in it in gear and causing boost surges back at your turbo fins. For those that do not know this.... surging basically is when the pressure in the intercooler hose's is greater than the turbo output at that given time. The boost pressure is now trying to take the path of least resistance and since this path is not througha closed off BOV or Throttle Body, it tries going back through your turbo which in turns tries to literally stop the blades in there tracks. You will hear something like "choo, choo, choo, choo, choo" really fast coming from your air filter if this is happening. Now as long as you can build your boost back up quickly from the quick shift, so minimal surging is allowed, you should be fine...but again...not good for the turbo...let the blow off valve do its job and release most of the boost. I quick shift only when realllllly neccesary and usually can get back up to full boost with in seconds keeping the rpm's above 4k. But mostly use the short shifter setup for just lazy easy shifting.... I am sooo bored right now. lol
Edited by Boosted_Behavior, 21 April 2006 - 05:17 PM.