| Author | Message | ||
     01xjbuell |
Dynoed my 1125 tonight. 129.22hp w/ very lean conditions.. Have sheet, wont let me post it. | ||
| Easyrider |
That's quick, took me a whole day..... How did you do it?. | ||
| No_rice |
That's quick, took me a whole day..... whole day? it should only take 10-15 minutes to do a baseline run on a dyno so that you know horse-torque and afv | ||
| 01xjbuell |
He couldn't get torque numbers, it was at a bike night here in Lowell... Told me to bring it in for tuning, I said "wish it was that easy" then explained the situation about having no tuner right now. Well, atleast I have an idea why they run so hot, lean lean lean | ||
| Zack3g |
how could he not get torque numbers? horsepower is a result of doing a little math with the torque value. | ||
| 01xjbuell |
need a spark plug wire clamp and he doesn't have the "full" set up in the portable unit i guess | ||
| Andella |
Mine dynoed 121.6 hp on that same machine at Motorcycle Night on June 10th. It was about 90 degrees out and high humidity. Goes to show you what the weather will do. (Message edited by andella on August 06, 2008) | ||
| Zack3g |
HP = TQ X RPM / 5252 So, in order to give you a HP number, the torque must be known. ...unless i'm missing something. | ||
| Mikellyjo |
So, assuming he had max HP at lets say 10000 RPM then his torque works out to be about 67.9. If it was at 9500 RPM then he is at 71.4 and so on... | ||
| Andella |
Here is my printout.. no torque either.  | ||
| Natexlh1000 |
"Tunning", eh? I would rather have a tuner that could write in English. | ||
| Josh_ |
No sparkplug pickup = no RPM for HP = TQ X RPM / 5252 . He plotted what he knew, the power and the speed the wheel was turning. No math involved. | ||
| 01xjbuell |
Ive also "lost" the inner airbox cover, and modified the exhaust a little... | ||
| Zac4mac |
I've dyno'd mine twice. At 700 miles, bone stock, 126.8 on Dan Dunn's dyno at NRHS. At 7000 miles I dyno'd at Epic Motosports with a slightly opened stock exhaust and no airbox(filter-yes) and got 127.8. Trying to set up a time with Dan to run with and without airbox on the same machine. Beats my old XB9R pretty hard... Z | ||
| Blake |
"So, in order to give you a HP number, the torque must be known. ...unless i'm missing something." The only thing that an inertial dynomometer needs to measure in order to calculate the RWHP is the time it takes for each turn of the drum. That's it, no other measurement is required. From the collection of time intervals and given the physical characteristics of the drum, HP may be calculated directly without ever figuring for torque. For each interval of time or each drum rotation the power being put down to acclerate the drum is found from the following equation... Power = Inertia of Drum x Acceleration of drum / time HP = Inertia of drum * Acceleration of drum / time / (550 FT*LB/S per HP) There's no torque anywhere in that equation. Well it is in there since... torque = inertia of drum * acceleration of drum. But, and here's the real catch, that is the torque at the rear wheel, not the engine torque, which is what dyno charts typically show. They report engine torque since the torque at the rear wheel will be different in each gear, with the highest torque in 1st gear and dropping with each successive upshift.  | ||
| Fresnobuell |
Zac, I haven't really been inside the airbox yet (soon to pull the solenoid), but isn't the airbox supposed to work in conjunction with the front ram air intake? Are you defeating the ram air by taking out the airbox? | ||
| Metalstorm |
Sorry for butting in here but one of the engineers that were at Seca this year told my friend and I to leave the airbox in. It definitely effects the ram air effect above 100mph. He was telling us that during test rides, before they got the airbox to seal, the top speed was in the low to mid 150's. After they got it to seal properly, top speed was in the high 160's. The gains won't show up on a dyno because there's no air flow. Dyno does not trigger (for lack of a better word) the ram air so you'll never see it on a sheet. | ||
| Zac4mac |
Bingo Metal. Best run on a dyno and best run on a track will require different set-ups. I think a variable speed squirrel-cage blower would work, shoved in the snorkel, to synth ram effect. I didn't like the sound without the inner box. Besides, Erik's sig is on my inner box, so it HAS to stay on...  Z | ||
| Striperx3 |
Z: Just put some holes in it. If you got REAL creative you could have a Pegasus made out of holes. One of the XB riders did a real nice job of Dremeling a Pegasus in his. Later | ||
| 01xjbuell |
Well for all those times I'm above 150... I guess I will miss the ram-air haha, but my bike stopped stumbling/ran alot smoother and the throttle response improved when I removed that inner cover. I also used the front fuel fill surround from my totaled XB12ss with the metal "grating" more air @ low RPM -Nick | ||
| Easyrider |
Wow, Is that 150 on the rear wheel?. Please share some info?. Stock airfilter or changed?. Stock exhaust or different and what?. Any Dyno graphs possible and what A/F figures on which RPM?. thanks for sharing | ||
| Krassh |
Speed not horsepower. | ||
| No_rice |
He was telling us that during test rides, before they got the airbox to seal, the top speed was in the low to mid 150's. After they got it to seal properly, top speed was in the high 160's. i can verify that. mine would run high 160's everytime, once i took the lid off im lucky to get 151-152 out of it. what is really funny though is that i have run it that way at black hawk and at mid america, and there isnt more than a couple bikes that could out pull it down the straights still. my friend is pissed because his 1000 gixxer with head work and cams gets out pulled by my 1125. just barely mind you, but its just barely EVERYTIME we have tried it | ||
| Blake |
How sweet it is. | ||
| Mingo |
1000 gixxer with headwork and cams gets outpulled by 1125, Do you believe the suzuki is running as it's capable of? or it would have if left "unheadworked and cammed"? If an 1125 outpulls a gsxr 1000 on a long straight that suzuki has some problems | ||
| Josh_ |
Depends on how long the straight is, what year the gixxer is, what gear they are in, what kind of drive they got off the last corner, what each rider weighs... I've passed GSXR1k and R1s on the straights (Barber, Blackhawk, Hallet). I've also been passed on a straight by a Kawi ZX6R who apparently got a heck of a jump off the last corner. | ||
| Mingo |
Oh, you must be talking "trackday racing" then. | ||
| No_rice |
i wouldnt say it would have to have problems to be out run. the preproduction ones i rode at road america were capable of out pulling an r1, zx10, and a 1000 gixxer(all control rider bikes). and they did it all day long. one of them was even on his 999 duc. full race trim. i kept barely out pulling him on the front straight and finally after one session asked him how much more there was left in that bike. he said that was it. he said that they were all impressed with how deceivingly quick the 1125's are and the fact that they could just get an edge over most their bikes. think about it, the ones that are winning races have been for the most part stock units yet, but they still are winning. now you can try to tell me its all rider. yes their riders are damn good, but then again so are the guys on the other bikes or they wouldnt be racing. im a good rider, but there are plenty of guys on the track when im out there that are better. how is it that i can catch them when i know good and well that they made the corner a bit faster than me. there is nothing scientific about this, but it is hard to dispute repeated examples also. | ||
| 01xjbuell |
FYI wasn't having any problems on the shorter straights at Loudon, HP figures are one thing... Those bikes need to spin to make their power, our torque is avail. so low in the RPM range that we get much better drives out of corners giving us the little headstart we need to out power them down the straights and corner to corner... Torque rules 99%% of the time as far as im concerned | ||
| Blake |
At high speeds aerodynamics matter. |
