Perhaps you've just found an honest rolling road. I bet a lot of them over-read and they want to make it look as if their tinkering has made a vast improvement to justify their prices!
Interestingly they said the only way to trick the machine is to feather the brakes on the run-down. This tricks the computer into thinking there is more drag in the trans and making the compensatory calculation. They could have done this today...given a printout with 60 bhp and I would have walked away delighted. Placebo.
I can't argue with the numbers and if someone quoted at you' I got a 25% bhp increase at the wheels from my mods' (insert manly voice here) then you'd be thinking that sounds good. I guess any percentage increase will sound good when your starting with such small numbers! See I've convinced myself (Placebo!) Like I said before if the BHP was high but it drove like a bag of spanners I'd be very upset. It's the reverse. It's lovely to drive and judging by my compression readings it's going to keep me mobile for the foreseeable and I've had fun doing it. And the fun part is what it's all about
Some more interesting reading if anyone missed it in Volkworld http://www.volkszone.com/VZi/showthread.php?t=722349
I can't fault the one I used. I was in there 3 times and only paid for 1 session. I could tell they were getting a bit sick of it today though (and the big boss was in!) I've got a brass neck
Be good if you could! I read it a while back, I recall, and yes twin carbs do make a difference. Webers came out on top as I recall.
Stranger things have happened. You never really know until you measure these things. Remember talking to the CSP guys at the Volksworld show one year. They knew the flow rates and back pressures for all of the commonly available exhausts - being diligent Germans, they'd actually measured them all. That's the way to do it !