Thanks, Warr. I noticed several things when I changed back to the stock airbox and JDM DV
1. turbo whine and intake flutter less prominent (obviously)
2. boost response slower
3. boost spike was lower by 1 to 2 psi, taper was also lower
4. exhaust sounded less loud
5. smoother to drive
In short, my Evo felt like it had its nuts cut off. No regrets going back to the HPI cone air intake and the GReddy - the car pulls harder and sounds more aggressive.
Warr, from your experience, could the tune have been set up in a way that required the cone air intake? I'm thinking that is unlikely, but I know little about tuning.
And yes, all hoses were tight
