| Author | Message | ||
     California69gs |
I've got a XB12scg......2006 what is the stock rear wheel horsepower and torque numbers. I got my bike dyno'd and was expecting more? | ||
| Slaughter |
You MIGHT get the info on American Sport Bike in their exhaust shoot-out. I think they started with curves on the stocker. Rear Wheel power/torque is always going to disappoint... but it is what counts! | ||
| Froggy |
Actual #'s will vary based on the weather, altitude, fuel quality, your bike's overall health, and most importantly, the dyno and dyno operator. Don't get too caught up in numbers. | ||
| Odie |
California- your posted numbers in the other thread fall right in line with the numbers posted in the Exhaust Shootout. And, what Froggy said. Especially "Don't get caught up in numbers!" | ||
| California69gs |
LOL, thanks guys. It's hard as all I have to go by are the numbers? Quality people ie odie and those at Hal's.....but still the most money I've ever invested into any of my vehicles for performance and fun. So I'm just nervous over the results. I'm hoping today when I pick it up, it's all worth it. As the seasons nearly done here in Wisconsin I wanted to do cosmetic stuff during winter, then enjoy my dream bike when spring starts. Just nervous I guess. | ||
| Reepicheep |
My stock 05 XB9SX dynod at either 73 or 76 (can't remember which) honest adjusted RWHP. I would expect a stock 12 to do about 10 hp better. The numbers quoted by people looking at the numbers are typically grossly inflated. And don't let plots fool you, it's as easy to inflate them on he dyno itself as it is to inflate them on the internet. Most dyno numbers posted on the Internet were not measured at the wheel or the crank, they were measured at the brochure  | ||
| Steve_mackay |
Don't be nervous about the results. I'm sure Hals isn't tuning your bike to make max #s look their best. But to tune it so you have a better running bike in the real world. A side benefit is more HP & Torque. But I'd bet it's not their highest priority. Tommy is a very competent tech. I wouldn't worry. | ||
| Reepicheep |
That's an important point. Peak HP is a measure of what your bike is doing at the point it can't do it anymore. Literally. It's the instant before the rev limiter chops the ignition. The HP versus RPM curve, from idle up to whatever your normal shift point is, is the real measure of what your bike does. You can't express it as a number, you have to look at the curve plotted versus RPM. The drummer is a great pipe, but this isn't the old days, and this isn't a sportster. Buell was getting most of what the motor had to offer out before your crate was opened, particulary if you are just doing "bolt on" mods like pipes and intakes. A shorter stroke higher revving will get better peak power (mainly due to higher rev before exploding capabilities), but at the cost of fuel economy and low end power. Don't worry... a light bike with 78 peak RWHP and a good low RPM power is a fast bike. | ||
| California69gs |
Feels like a totally different bike! lol Seems like more power through 2-6K rpm now, and when I twist the throttle, man does it pull! Certainly no more studders, my special ops pipe helped it a lot, but now I don't hear/feel it at all anymore. Lost my liscense plate off the back though. Must not have tightened those nuts good enough. Between the dyno and the ride home. Found it back, but it's been run over a couple times, lol. looks like i got more cometic stuff to do now! | ||
| Limitedx1 |
i think what he may be asking is why the book says 100 and whatever horsepower. i believe just like all the car makers dyno their engines on a stand and not in a vehicle. so posted numbers are crank hp. thunderstorm engines are 103 or 101 hp motors, but you have to take in drivetrain loss. just be glad we have it much better than cars! typical car hp loss is 20-25% through a transmission and axle! | ||
| Odie |
Glad it worked out as you wanted it to!! Be safe! | ||
| California69gs |
yeah.......I was expecting to see over 100 because the stock listing on Buell.com lists 12Xb's So when they told me it was in the 80's I was disappointed. To be sure Odie......I've very happy....the bike now grabs the road and power is smooth all with way to red line... and the sound is just as mean! Now I just gotta pretty her up for next spring | ||
| Slaughter |
Heck, I'm really pleased that I can get 100 out of a full race motor. I think 87-ish is the BEST you can expect but you need to tune it for throttle response much more than top HP. (unless you're racing Bonneville) You can't go wrong having Hals work your motor! | ||
| Eboos |
My M2 I measured at 79.98hp at 6300 rpm and 69.86 tq at 3850 rpm. This is with SE bolt in cams, crossroads ac, Wilieco pipe and mikuni carb. 86 degrees with 33% humidity. | ||
| Sifo |
Here's a dyno run on my 06 XB12Ss. I was still doing some tuning on it when a local dealer had a free dyno day. As I finished the tuning process I don't think I ever got more peak HP, but did get the dip around 2500 rpm fixed up. I've got a K&N filter, air box opened up, and a Jardine slip on.  | ||
| Eboos |
I'm pretty sure there is something choking off my bike. I will be looking into that this winter. | ||
| Froggy |
They rate it at 103hp at the crank from the factory, so that would mean your bike would have to be in perfect conditions and have less than 3% drivetrain loss. Long story short, it ain't happening. | ||
| California69gs |
reading the paperwork, I'm guessing Tom F. is "tommy" and he was the one who did the tuning so that should be a good thing! | ||
| California69gs |
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