Mustang Vs. Airboy
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I'm not sure I agree with this. Since the software in an inertia dyno is constantly calculating and compensating for the given inertia of the rollers, it should still be able to pick up any tiny variances in power delivery. The inertia of the rollers could definitely make it harder to feel any power dips and spikes while on the dyno, but the software should still be able to pick these out just fine from the overall inertial effect. The only resolution limitation I could see would be the resolution of the roller speed sensor that the dyno uses to acquire its data.
I think the main benefit to a brake dyno is the capability to replicate a real world load curve and to provide steady state testing which is impossible on an inertia dyno. This certainly makes the brake dyno a more useful tuning and R&D tool all around, but I don't think there's necessarily an advantage in terms of actual resolution of the power measurements.
BTW, Dynojet also makes a brake dyno and Mustang also makes a large roller dyno
.
Thanks
-- Ed
I think the main benefit to a brake dyno is the capability to replicate a real world load curve and to provide steady state testing which is impossible on an inertia dyno. This certainly makes the brake dyno a more useful tuning and R&D tool all around, but I don't think there's necessarily an advantage in terms of actual resolution of the power measurements.
BTW, Dynojet also makes a brake dyno and Mustang also makes a large roller dyno
.Thanks
-- Ed
I would actually be interested in getting a look at the modeling used to deal with the inertia of the rollers. You would have to start thinking about the drivetrain/tires/rollers as an entire system and I'd be interested to see if it is dealt with at all. I am still talking in simple terms.. No matter how you slice it there has to be a "fudge factor" involved somewhere in the calculation.
But then again I'm not exactly quite a nerd enough to really get a handle on it I'm sure. I got a "C" in multiple variable calculus a couple semesters ago (Old age and school / career change attempts suck).. And my various physics profs all had serious personal issues that interfered with our classes.. That and I'm still a year or so off of my mechanical engineering degree that I will probably never complete..
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Yessir.. And that happened at a relatively high RPM.. SO uh.. THe 68HTA can flow 30psi up top...
On e85 I imagine the intake charge wouldnt be overly toasted either.. If i ever build this motor / drivetrain I think I am going to be exploring the upper limits of this turbo.
10.5@130 DSM 68hta
http://www.youtube.com/watch?v=MYhUjHC9HTU
"mojoro - Leaving the line about 18-19 and creeping somewhere just this side of 30. IT was in the 60s or so as I recall. Humidity was pretty high."
On e85 I imagine the intake charge wouldnt be overly toasted either.. If i ever build this motor / drivetrain I think I am going to be exploring the upper limits of this turbo.
10.5@130 DSM 68hta
http://www.youtube.com/watch?v=MYhUjHC9HTU
"mojoro - Leaving the line about 18-19 and creeping somewhere just this side of 30. IT was in the 60s or so as I recall. Humidity was pretty high."
Last edited by Bouncer; Apr 1, 2010 at 02:48 PM.
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DAMN!! Look at that SPOOL. So you were already trapping 127 at what whp?
You know what kinda numbers I'm thinking for et? Rhymes with my name.
You know what kinda numbers I'm thinking for et? Rhymes with my name.
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haha... I was thinking of that number on my way to work this morning...beeeyyyaaaaaaaa
