Handling seems to be the same with the k member, though my car being a convertible i had to lose the cross brace underneath and i also removed my strut tower bar to help get rid of some cowl shake. springs are the 12" 250# upr's that came with the kit, I'm told by many those are too soft, though i cannot imagine how a 300+ would ride, i have eibach pro springs in tokico's in the rear still. my car has always been a good handler with good tracking/turn in / etc. i would say with the current alignment the steering is a bit more responsive as well.
I may be completely wrong here, and feel free to slap me if i am, but i was under the impression that 10#'s on a 61mm would put down the same power as 10#'s on a 90mm? the smaller turbo just spools quicker and has lower max hp limit.
So my car is a garage queen, owned it since new, only 51k miles on it. i have probably 1800 miles on the turbo / forged bottom end install. about 3-400 miles total on the 14# tune. the car has done well, i ran into some issues with the A/C dumping freon twice. once was a loose hose at the compressor, second time was a line that came into contact with the exhaust piping and burned a pin hole in it. that has since been replaced and properly shielded. just a few weeks ago i drove it to work (84 miles each way), i made a hit on the hwy about 18 miles from my house, 65 - 135 pull up a slight hill, about 11 seconds altogether, all seemed fine. top down the whole way. pull into work, put the top up, still no issues. about 90 minutes later i went to make a run to the post office and bank, my warehouse guy was in the parking lot, he shot me a txt a few minutes later and said the car was tapping from the time i started it until i was out of site. ironically i stopped and got gas about 20 minutes later, as i was pulling out of the station i blew the fuel rail off of an injector, got it back to work, let it cool, re-seated it, (ordered retaining clips that night) rinsed the motor off and started it up. the tapping was loud and clear when the motor was revved, coming from the front psgr side head (MHS stage 2 heads). sometimes it would do it at idle, sometimes it wouldn't. the tempo increased with the rpm's and got a bit louder though the tone did not change. no coolant or gas in the oil, no oil in the coolant, no loss of power, no smoke. made sure all the spark plugs were tight and babied it home. dropped it off at the shop the next morning. my first thoughts was oil- i put 10w30 in the car per hellion's recommendation. a few of my customers that deal in mod motors said that is a big no-no due to clearance issues and lash adjusters, wish i would have asked that earlier... anyway, shop that built the motor pulled the valve cover and replaced the lash adjusters as they assumed that was the problem as well, and one did seem to fight a bit when compressing it, put 5w20 back in it, fired it up and the tapping is still there. i have not heard back from them since, we talked about worse case scenarios, i.e. spun bearing, broken ring, valve seat or guide etc. and none of the symptoms really match those problems. so that is where I'm at now. we don't think there is anything majorly wrong at this point and some of these cars were notorious for a tapping noise mystery that could never be solved, i hope i am not one of them..
'01 Hellion'd single turbo 2v