Cheers for the mention Edde, but my Ive never referred to 1/4 mile improvements - Ive never been quarter-miling!!
I do like my superchip remap, though - loads of torque. I posted about 4 weeks ago to say Id had it RRd in very hot temp of 91F, and it still gave 167bhp and 154lbft at the fly. My point was that that ambient temp is going to reduce power by maybe -5%, so if you add that back on bhp would be about 176ish and torque would be 162ish: OK, so BHP is therefore only up 4bhp, but torque is up a whooping 15lb ft from 147 as standard. I think thats worth having, and you can feel the urgency it now has at 3000-4000 revs - feels more torquey than my Golf VR6 ever did!
Of course, the real reason I chose the superchip was for its reversibility should any warranty issues rear their ugly head - I was really up for a an R-sport ECU until I checked the warranty position with R-sport themselves - it aint covered.