Yeah, dyno could be off 7 or 8 hp.
Also, keep in mind one thing that I've learned lately doing a lot of tuning using wideband commanders and my new Bazzaz performance unit on my CBR. The leaner maps will produce the top HP, but they are also very bad for longevity on a motor. A good friend of mine is a Honda mechanic and also knows some top tuners in AMA, as well as having access to Dan Kyle, Bruce, etc.. They all said that top HP is produced around 13.6 - 13.8 AFR, but race teams rebuild their motors every few races. All the top guys recommend running a street motor somewhere around 12.8 - 13.1 AFR. Will produce a couple HP less but will be much easier on the the motor. Another thing that is interesting is that they aren't tunning for the same AFR all the way across the board. I quote my buddy below to save on typing
"Well I just got an o2 bung welded onto my stock exhaust and the guy who did it is semi retired only works 2 half days per week. He used to build race bikes for Honda canada back when they raced. He started talking to me casually about what I was doing and I laid all my cards on the table with where we are at. He says you need two diferent target a/f ratios. You want 12.8 to 13.00 at your peak torque and then from there you want to gradually get richer down to 11.8 till peak rpms. As he was describing that to me at first I thought this guys fucked, but then I remembered your oe map looked like that as well. So I asked him why and he started talking about thermal efficieny getting worse at higher rpms and ignition advance changes and other stuff it basically all went over my head. But I thought I'd pas along what I heard. Interestingly enough the original dynojet map made by dusty for our aratas does what this guy was telling me. It seems there is so much more to all this then the chat boards have any idea about."
Food for thought anyway. I've been doing quite a bit of tuning on my CBR. It will be some time before I have "the perfect map" on this bad boy but it sure is fun trying. Now that I have wideband and an o2 sensor along with mapping capabilities including a handle mounted toggle switch to switch between maps .. LOL