Well lets start with a few mods I recently installed and had dynoed. As follows:
Alba race pipe,
11.5:1 piston,
Titanium valve springs,
new clutch with 60% rwr springs,
alba ported head,
tm 45 carb,
carb mount k&n, (got rid of those stupid snorkels and airbox tube, as I like to refer to as the weekest link)
RWR cdi ( always had),
Using 104 octane fuel,
Im running a 170 main with a 40 pilot. I have an eccelerator pump, but have not installed it yet because I am racing this weekend, and will not be using bottom end anyway. NOw, I dynoed at 49 hp with 43.5 torque. The jetting is spot on for my area according to the dyno guys at an air fuel mixture of 13.7. My hp runs great to around 8000 before it just drops slightly. It is a rather impressive curve for a carborated motor in my opinion. But here is the kicker, I was really expecting to hit about 55 hp, mostly because I was seeing people with the same mods SUPPOSEDLY hitting 60 -65, and I calculated in the exageration factor. This thing pulls extemely hard and is extemely impressive in my opinion. Did the dyno get run correctly? I have never had a dyno done before so if I could get some opinion this would help. They removed one wheel because it was set up for street bike testing. Is this common? They had plenty of air pressure in the one wheel, and plenty of down force, so no slipping was occuring! They run in 4th gear,(after it warms up to opperating temp) at about 1800 rpm and then hammer it up to around 8400 to get the reading. Please dont get me wrong, I think this bike is very impressive and Im happy with it for now. I just needed to get the dyno done for a before and after reading, for my next round of mods. By the way, the next round of mods is going to be fantastic. In closing, I would like to say to all those distributors that sell bolt on mods, ADVERTISE SOME REALISTIC NUMBERS FOR A CHANGE, BECAUSE YOU ARE FULL OF S$$$. Not that I didnt know that already, but you cant tell until you have it printed out in front of you on a computer screen. The numbes dont lie!!!!
Anyway, this is my story for the day. Im looking forward to reading all the input!!!

DStroyer

 

I have more mods than you and the dyno I use showed me with less HP than you!

I didn't go to the dyno to get a number I went there to get it tuned.

To re-state what you have already said. . . if you buy a kit from a builder and expect their HP numbers then go to a different dyno (3rd party) and don't get that number DO NOT BE DISAPPOINTED!

If you want a high HP number take your bike to Trinity or some other builder and ask them to put it on their dyno. Then you can walk away happy because you have over 60HP (until you get beat by a guy that says he has 50HP because he used that lower dyno number!)

Dyno's are for tuning. They will give a general idea of power but, the better way would have been for you to dyno before mods and after mods.

Other than that. . . why are you running race gas with 11:1 piston? You should be fine with pump gas. That 170 main sounds real rich (I only run a 150 on the TM45 - w/o the pump also.) That air / fuel mixture sounds good though. Which cams are you running?

 

I agree with DuneMe! You are running way 2 rich! I had the same set up as you with no porting, 12:5:1 piston and 109 grind cams and mine dynoed at 55 h.p. at four Stroke wars. And they said add another 2 h.p. for the tires they were using. Now I don't exactly beleive that Dyno but I am pretty sure I was over 50 h.p. You should be running a 150 to a 157.5 jetting, anything more than that and you are DEFINALTLEY to rich! Also the 104 octane is probably hurting you. Drop down to a 100 octane fuel or even a 92 octane and change that jetting and I Gurantee you will pick up at least 2 more h.p. Also try running straight V.P. Ultimate 4 that stuff is the shiznit up to a 12:5:! piston. Good luck.

 

yeah that jetting is very rich, i run 145 and i have a few mods in mine also, i wouldn't worry about dyno numbers just wins[img]i/expressions/face-icon-small-smile.gif[/img]

 

Duneme,

Im running the web .395 lift cams on intake and exhaust. I didnt go to the dyno to get breggin rights or anything, I just wanted to get it dialed in for the weekend. Im heading to Silver Lake Michigan tomorrow morning. The other reason for the dyno is to get an idea of where I want to go for the next round of mods. The dnyo run was done by an independent sport shop. I purchased all the goods from Alba and
RWR and did all the work myself. I realize that everyone would say im running extremely rich, even RWR and Alba said the same thing. But when it was tested, my AFM stayed within 1 point of the sweet spot of 13.1 all the way thru the power band. So what I will do this weekend is take a run at Silver Lake with the 170 main, and then drop to the 147.5 like RWR suggested, and see what seems faster. I do know this, and this should put a smile on all DSers faces in here. My friend did the same mods to his Raptor. We built both of them over the last week or so. His dyno run was 44 hp with 36 torque. This was done right after mine. These are still very powerfull numbers. He must get a longer swing arm though, he cannot keep the front end down 1st - 3rd. The club we both belong to is going with us this weekend, but none of them know what kind of mods we made. We managed to keep it a secret. There seems to be alot of breggin going on between these people about who's bike is faster, but my friend and I will set these people straight once and for all this weekend.
I appreciate all the input, and look forward to hearing more.

DStroyer

 

no doubts being that rich will cost several hp, I'm very surprised the bike dynoed that high with a 170 main.

 

once you are comfortable with the break in run your friends raptor, see where you run next to him at, then you rejet then run again that way you will see the difference it makes. bigslim came to the coast with a 190 main in his stock carb and it also dyno'ed good, but i told him i didn't have anything that big in my quads, so we went down to 172.5 and we figure he gained two quads in a short hill race. the reason for jetting yours first is because you will be able to get another ride in while your friend rejets his. that is another reason to get a ds over a raptor that jetting is a pain, for them

 

That jetting sure is a pain for the Rappy boys. We have it down to a nascar comparable pitstop at about 25 minutes with the 2 of us working on it. The DS, well, you all know this is a much friendlier machine.

Anyone else happen to be from the midwest and heading to Silver lake?

Dstroyer

 

Go suprise your group! Nothing beats the look of shock on the face that comes up the hill behind you!

 

Me and my mechanik have it down to 30min jet change on a rappy...that's after tearing it down 40 times...lol