| Author | Message | ||
     Garrett2 |
I had dynod it before at Cox HD in Asheboro NC about two years ago, but yesterday my website had a dyno day at Turbo Tune in Greensboro and so i took my bike out cause my car wasnt running right. made lower numbers. sucked. 81hp 72 tq on a dynojet (thats SAE to the wheels) I was running really lean in the middle and went rich up top oh well, not a big deal, im planning on tearing her down this winter for cams, port and polish, bigger valves, and a 30 shot of the laughing gas. but yeah, anyone else dyno these? its a 99 s3 FI | ||
| Easy_rider |
Always felt my '99 S3 didn't feel quite right. Never dyno'd it though. I've got a feeling they built ours on the same day. How many miles does yours have? | ||
| Garrett2 |
mine has 16k on it and i can tell you ive run the piss out of it not sure where you are easyrider, but hopefully there is a dyno near you, i recommend anyone to do it, its good to know, then you know if you do have an issue or not. | ||
| Silas_clone |
Garrett, Where in Greensboro? How much? Do they change the jetting, timing etc., or do they just tell you if you are off? | ||
| Garrett2 |
Its on Chapman, right near the Colesium. He normally charges 45 for 3 pulls. He does tuning, but that is extra, i know he was telling me he'll do a complete custom map on a power commander for 200. I also know he usually charges 100/hr for tuning, so if you wanted to play with jets and whatall then thatd be a good time to do that, you could get he doesnt tell you if you are off or not, just tells you your numbers, well at least with me, I was the first buell he'd ever done. | ||
| Djkaplan |
81hp to the rear wheel sounds about right for a stock S3. | ||
| Easy_rider |
Dj, I always figured that there'd be less than 10 hp lost through the transmission, with a very small amount through the belt. Don't remember where those numbers came from. Have you got some better breakouts? | ||
| Oldog |
the s3 and the x1 are in essence the same motor, I suspect that my local dyno may be a little "HAPPY" bone stock 83 hp peak with a hole in the curve about 2500~3000 force winder and super trapp flat tq curve and 85 peak The DATA : http://www.badweatherbikers.com/cgibin/discus/show.cgi?tpc=3842&post=403676#POST403676 (Message edited by oldog on November 13, 2006) | ||
| Easy_rider |
Huh. I'm surprised. Explains some things, though. Where'd all the ponies go? (What's the breakout of the losses?) | ||
| Oldog |
Easy, as I "understand it" the 101HP number is at the end of the crank, with no alternator, or other drive line losses total losses some rule of thumb numbers I have been given a ball bearing is 98% efficient, chain and belt a bit less not sure. alternator loss not sure. lets figure that my sled made 101 hp peak and the Peak Rwhp was 82.4 so 82.4 / 101 = .8158 or about 81 1/2% if that were the case loss including alternator would be ~ 19 % I have heard that the drive line loss not including the alternater is "supposed to be 10~15%" in the end rear wheel HP is REAL WORLD HP .. | ||
| Tattoodnscrewd |
To add to the mix ... my 99M2 .. race air cleaner, ignition, V&H slip-on are all that were on it .. IIRC - 84 rwhp .. I have been told that the race exhaust will prove to add a couple more ... curious to see as that was added after the run. Plan to do some dyno-tuning at Hal's Speed Shop this winter to squeeze all I can out of it. Worst case scenario, I swap cams... would be nice to get as close to 100rwhp without too much internal work being done (Wishful thinking I know) | ||
| Easy_rider |
Somewhere I've stuck in my mind that the tranny costs about 10 hp. Somewhere nearby is that the belt is 97% efficient. Lucky for my we're starting with 101 so I'll use 3 (yes, I know there's less than a 100 HP at the point the 97% kicks in, but I'm lazy!). Hadn't figured in the alternator. I must be a little off on the numbers above -- 8 HP to drive the alternator seems a little excessive. In the end, no matter what I've got, I want more. | ||
| Oldog |
Like you 8 hp seems a lot, remember the chain is a drag and the tensioner shoe is a drag, I bet the alternator is about 1 - 3 hp, check I think custom chrome some one had an alternator setup that switched off the stator SUPPOSEDLY increasing HP 101 crank hp -3 alternator -11 tranny -2.6 belt -1.7 pri chain & tensioner -1.0 brakes / wheel bearings 81.7 + 2 Super trapp + 1 Force winder + 2 combination effect more air in and out the EFI adjusts to this on the o2 area of ops. 86.7 rwhp I did not "run it" with the items seprately that would be interesting, there is a piece in the KV about the FW, (Message edited by OlDog on November 17, 2006) | ||
| Djkaplan |
I think it's a mistake to give the advertised 101 crankshaft horsepower any creedence. I'm not sure how you'd even measure the horsepower at the crankshaft on a unitized engine. | ||
| Easy_rider |
Looks reasonable, Oldog. Thanks! DJ, I'm not real big on the 101 measurement, either. I'm sure some guys worked real hard to attain it, but in the end I think it reflects marketing more than real life. I also expect that it came at the expense of the mid-range where I really ride. If I had all the time and money I wanted I'd try putting M2 cams in to what the everyday ride felt like. |
