HX is being tuned now should have similar results as the VX. I know alot of HX owners are holding their breaths for these results, It will be worth the wait!
the previous car that was finished was a VX engine in a EG (92-95) Si civic hatch, fully loaded car with all options (sunroof, power everything)
this had 3 passengers and 3 suitcases going on a holiday. and I cant stress this enough it was only using set cruise technique