Other DASA Dyno back in business?
- Thread starter zimmy
- Start date
Schmidty721
someone turf my rails
- Location
- WI
Oh great, another dyno thread.
They could have that thing spit out any numbers they wanted lol. As Matt already said, only good as a tuning tool.
They could have that thing spit out any numbers they wanted lol. As Matt already said, only good as a tuning tool.
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
If a ski can make 200 HP on a Dyno, does not mean that it can put that power to the water.
ur chitting me.
DAG
Yes, my balls tickled from that landing
- Location
- Charlotte, NC
For having a dyno, DASA sure does suck at recommending jetting specs for basic setups.... #hatargonnahate?
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
IF all the power is in the top end of the power band it may be useless..............
If it has nothing but power in the middle and nothing on bottom or top, it is useless.
It is just a damn tuning tool, just like a Tach.
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
BruceSki
Formerly Motoman25
- Location
- Long Island
wheres scorn?
DAG
Yes, my balls tickled from that landing
- Location
- Charlotte, NC
Motor builders should know jetting specs for their packages. Not something thats 20 sizes rich; expecually if they have a dyno... ha
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
If he lives at the exact same elevation as you, he might could give you better info.... There are too many variables. That why you see many say "Ask your builder". Did he build your motor? Your builder should know better what jetting to go with. He knows your package and setup better.
he is safer 20 sizes rich then 5 sizes lean.
I can understand the frustration, but the expectation that a motor builder should know the jetting for a second or possibly third-hand motor with who-knows-what-mods (and spend a bunch of time to figure it out, with someone who isn't paying) is a bit unreasonable.
Consider how many different carbs makes and sizes are on the market today. Each of them will have quite different jetting points that also depend on the popoff, fuel type, and flame arrestor.
Reeds and intake can change jetting
At least two very popular exhausts, both have potentially different jetting requirements
Ignition and ignition timing can affect jetting
Pump size and load can change jetting
Elevation, air temperature, and even humidity can change jetting in some carbs.
Those are the things I can think of right off the bat. And those are just the things that affect jetting. What about all the other things that could be mistaken as a jetting problem? We all know that there's two types of jetski problems: "Just needs a battery" and "It's the carbs!"
These kind of problems are unfortunately very complex. If you were the original buyer, I could see a busy builder spending more than just a 10-20 minute phone call on you. But the fact is, you didn't spend any money with the builder on that motor. Those are the risks you take with a used setup, unfortunately.
And can you imagine your frustration if the jetting he gave you had been even 2.5 points lean instead of 20 rich?
Edit: Of course there are builders who will spend the time with a non-paying customer to figure it out. That's very nice, but I would not expect it.
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- Location
- Grand Rapids
DAG
Yes, my balls tickled from that landing
- Location
- Charlotte, NC
You sure about that? Please give details...
Maybe they want to make sure the engine has some "safe" run time before the owner turns up the heat. I certainly wouldnt provide peak power jetting on a tight top end. They can lean it in after a few hours of run time. I wouldnt want to sell a loose top end just to compensate for high initial temps.
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