Dyno results thread

[gl_s_r]

In my simple mind turbulence and availability.... think that is the thing to look at.... if it has lots of undisturbed air to gulp down then lovely.

The shape at the top of the stack can promote acceleration so it can be considered as partially important..

[agentpineapple]

very interesting gents, yeti you are a very lucky man....
anyways, heres my last dyno print out, as you can see the a/f is a little off and its a bit down on power. it was taken in one of those mobile dyno's with flashing lights on it....

[MacV2]

very interesting gents, yeti you are a very lucky man....
anyways, heres my last dyno print out, as you can see the a/f is a little off and its a bit down on power. it was taken in one of those mobile dyno's with flashing lights on it....

Surely some mistake...

I didn't think you had a heart !


Didn't you get a print out from the Brands run ?

[gl_s_r]

Thanks for posting that Mark, it can be seen clearly in the wireframe. Yes the Mori ones have a taper to them whereas the Dr H ones don't. Also the ring doughnut shape at the top differs. The Dr H ones are more rounded so air will behave differently as it gets sucked in. I have a feeling the Dr Honda's would be better for street use.

So for true (ish) copies of the Mori stack then HPower are the only ones.



Very complicated stuff air capacity and airflow, even right down to quantity. Looking at Yeti's airbox and all the bits in there ie ram tubes. I'm wondering if there is the same cubic capacity inside his airbox as a standard airbox, it's just that the air is fed in differently. In theory it seems logical, more air = more fuel, more fuel and air = more power. Maybe not there must be an optimum amount that can be reached per the size of the combustion space and compression for maximum displacement. But this is getting into Boyle's law and Charles's law territory.

(:-})

They all have an internal taper of 6 degrees...

[agentpineapple]

Didn't you get a print out from the Brands run ? [/quote]

to embarrassed to upload the brands dyno.......

[geodude]

I'm looking forward to getting my results. I reckon I'll be lucky to get 120 though. I'm worried it might start me down a route of more expense!! lol

[AMCQ46]

very interesting to see the engineering drawings, that puts it into context...........out of interest did you also measure the standard plastic ones so we can see how the length compares?

[motostorm]

[gl_s_r]

very interesting to see the engineering drawings, that puts it into context...........out of interest did you also measure the standard plastic ones so we can see how the length compares?

I can do this after Easter if you would like that?

[YETI]

knew a clever fella would be along at some point ,
thanks gl_s_r ,
I thought I had the only set of MORIWAKI velocity stacks
for a storm just kinda knockin around ??

YETI..

[agentpineapple]

knew a clever fella would be along at some point ,
thanks gl_s_r ,
I thought I had the only set of MORIWAKI velocity stacks
for a storm just kinda knockin around ??

YETI..

looks like you have compition yeti.......

[edds11]

cc x max rev's / 2 (4 stroke only one being induction, 2 strokes per revolution ) = max capacity of air. then divide by 60 gives you total cc of air change per second in the airbox. I think

[VTRDark]

Nice one edds so I am on to something then with there being a point where it has a negative effect.

then divide by 60

where the 60 come from. And with the revs would that be where the rev limiter is set a, so already pre-determined by the manufacturer. Maths is not my strong point.

(:-})

[MacV2]

Nice one edds so I am on to something then with there being a point where it has a negative effect.

then divide by 60

where the 60 come from. And with the revs would that be where the rev limiter is set a, so already pre-determined by the manufacturer. Maths is not my strong point.

(:-})

''then divide by 60 gives you total cc of air change per second in the airbox.

Maths ain't my strong point either but there are definitely 60 seconds to a minuet.

[AMCQ46]

very interesting to see the engineering drawings, that puts it into context...........out of interest did you also measure the standard plastic ones so we can see how the length compares?

I can do this after Easter if you would like that?

yes please