Any reputable professional will tell you that you cannot feel anything less than a 10% change. It's just like when you run down the 1/4 feeling you're on your new best run only to find you're 2/10ths away. Your mind, your body, simply cannot tell the difference. Think about this, you gain or lose 5 lbs. On your bike, there's no way you're going to feel it be slightly faster or slower, although it will be. 20 lbs? You might feel that making a little difference but even then it'll barely be perceptible. After all, 20 lbs is generally considered to be about a tenth in the quarter. You can't feel a tenth in the quarter in a 9-10 second run.
You're bikes making 190 hp stock on your guys dyno down the street. You're not going to feel a difference until you get to around 210 (or 170). Now, here's the thing, even at that point it's just telling a difference NOT that it "pulls way harder now". I don't really know what a 10% increase throughout the powerband would result in lowering 1/4 mile times (or increasing rate of acceleration) but most likely it would probably be around a 10th or two. It's not going to make a 9.5 second bike a 8.5 second bike! 10% is where it's going to become perceptible, it doesn't necessarily mean it's going to feel drastically different (at 10%). And there is not one flash tune that increases power 10% throughout the power band, usually somewhere around 3-7% and that's usually with an exhaust change.
This is why performance improvements should not be measured on a dyno sheet. Take your dyno sheets and put them through the shredder. Dyno readout doesn't really mean anything at all. Back to the first sentence in the last paragraph. You're bikes making 190 hp stock, most likely measured on a static dyno. You get an ECU tune on that static dyno, and now your dyno readout is showing 202hp. So you put it on the street, well what happens now when ram air effect starts? It's going to throw that tune off. Now again, we're really talking small differences, ram air, no ram air, we're playing with 3% not 20%. We're talking about differences you can't really feel anyway! Maybe, at lower speeds < 80 mph ram air isn't doing anything. This is why if you want to talk about performance (particularly acceleration) you should NOT post dyno charts as evidence of your bike being faster. All a dyno chart is proof that on a dyno your bike measured differently than it did before.
Like I've said before, don't be surprised when you run some test and find out your real world numbers haven't really changed, because they're not going to, especially in some significant manner. I mean the greatest tuning package ("pipes and a jet kit") is going to be worth at most a tenth or two (two is pushing it...REALLY pushing it). There's no 1/2 second gain in a tune. It's just not going to happen, and for all the fan fair bullshit people posted here about their new flashes (from anyone) pulling their arms out of their sockets it's just been ridiculous for someone with some sense to read and try to understand what's going through these people's heads.
We've seen actual testing that basically showed OE = Cblast = Guhls, all within a tenth of each other. That means more than all the dyno chart bullshit ever posted by everyone in the history of the internet.
* Last updated by: VicThing on 12/31/2016 @ 4:02 AM *
