jwm
Active Member
In the early engines maybe, but my 1985 carburetor engine has no pump in the system. It is supposedly reliant on there being a compression in the air filter and a depression in the exhaust port for air to be drawn (not injected) into the exhaust flow. I can figure no point in the Otto Cycle where these conditions would exist. The opposite yes, but air movement from exhaust port to air filter is prevented by non return valves. Without a pump, I just cannot see how air will be induced to flow in the direction it is required to do.
Johnny.
jamesmartin
Well-Known Member
venturi
jwm
Active Member
I can see where you're coming from James, but I cannot see a venturi effect being strong enough to pull air from a depressive atmosphere in the air filter to a pulsing compressive atmosphere in the exhaust. Without the non return valves, I can easily see how it would flow the other way.
Johnny.
Not familiar with that system but there is always a small depression present in each exhaust stack as the exhaust valve shuts. Valve overlap lets the out going exhaust suck the new charge in. When the valve shuts the exhaust flow just does not stop, it continues causing a depression behind the valve, maybe it works on that principal. That is the basic principal around a tuned pipe on a two stroke.
jwm
Active Member
"a small depression present in each exhaust stack as the exhaust valve shuts." ...... "basic principal around a tuned pipe on a two stroke. "
CLICK ... I do believe I'm starting to get the gist of this!
(Fond memories of an Ariel Arrow Racer ... many moons ago now.)
So ... When (if) I remove the original air filter set up and fit two separate cone filters to the carbs, I will need to lash up some sort of connection for the Pulsair feed pipes. From an MoT exhaust emmissions point of view, simply removing and sealing off the system would not seem to be such a good idea? Perhaps the ugly old original filter set up is gonna stay.
Perhaps I'll start peeking under P5/P6 bonnets, to see how they are rigged. Or maybe start reconsidering a quad.
Johnny
CLICK ... I do believe I'm starting to get the gist of this!
(Fond memories of an Ariel Arrow Racer ... many moons ago now.)So ... When (if) I remove the original air filter set up and fit two separate cone filters to the carbs, I will need to lash up some sort of connection for the Pulsair feed pipes. From an MoT exhaust emmissions point of view, simply removing and sealing off the system would not seem to be such a good idea? Perhaps the ugly old original filter set up is gonna stay.
Perhaps I'll start peeking under P5/P6 bonnets, to see how they are rigged. Or maybe start reconsidering a quad.
Johnny
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jamesmartin
Well-Known Member
ive allways removed any system ,you can get plugs for the holes
High Lander
Active Member
I've got a mate who fitted a Hydrogen kit and he swears by it. Mind you, he also thinks a massive red planet called Nibiru is going to come a long and **** us up at the end of the year - so possibly not the most reliable authority on anything.
jwm
Active Member
Plugging the holes is no problem, I'm more concerned about the emmissions for MoT. It's overdue anyway, so I guess it's a case of no mods before it gets through, then I've got a year to play with it before the next test .
Getting back to the Brown's Gas theories though. Are we in agreement that the gas induction could well be usefull, but it's the energy used to produce it, against the energy gain balance that is in dispute?
Johnny.
.Getting back to the Brown's Gas theories though. Are we in agreement that the gas induction could well be usefull, but it's the energy used to produce it, against the energy gain balance that is in dispute?
Johnny.
jwm
Active Member
If ye wis a wee bit nearer High Lander, I'd have askit fer 'is 'ome 20 and gorn fer a look see. I'd love to see one of these rigs in action. But me son escaped from Clydebank last month and has joined me in the soggy Welsh mountains, so I doubt I'll be up your way agin in the near future.
Johnny.
Johnny.
jwm
Active Member
I had a gold and white one, lovely memories and lovely bike
I keep lookin' at them on E-bay Landowner, but she gives me a clip round the ear if she catches me.
Now if a nice Triton were to pop up at the right price, I just might risk the wrath of SWMBO.
Johnny.
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jwm
Active Member
Talkin' of bikes in the 60s, another suposed 'Spark booster' we used to use at Brands involved cutting the HT leads 3" from the plugs, inserting a drawing pin in each end, then feeding them into a piece of clear petrol pipe. The gap between the pins was then adjusted until the spark was seen to jump the gap. It looked pretty in the dark, but it did seem to pep up the spark at the plug too. An similar ready made gizmo is hawked at most motor shows, but for me, not at that price matey.
I don't doubt that the Naysayers will trounce this theory too.
Johnny.
I don't doubt that the Naysayers will trounce this theory too.
Johnny.
High Lander
Active Member
If ye wis a wee bit nearer High Lander, I'd have askit fer 'is 'ome 20 and gorn fer a look see. I'd love to see one of these rigs in action. But me son escaped from Clydebank last month and has joined me in the soggy Welsh mountains, so I doubt I'll be up your way agin in the near future.
Johnny.
He's buggered off to Aus! Welcome in the Highlands anytime all the same mate
jwm
Active Member
No Clarky, these are/were meant for use in petrol engines. If you imagine a standard spark plug with a much thicker center electrode, and the sides of the body extended up to the same level, but with six slots cut in them.
Thus forming six fat earth potential electrodes in a circle around the center one, and creating a fixed but even circular spark gap. The resulting spark fills the circular gap and is much bigger and hotter than a standard plug. They were reputed to be able to fire in an oiled up condition too, but I wouldn't like to try to prove that one.
Johnny
Thus forming six fat earth potential electrodes in a circle around the center one, and creating a fixed but even circular spark gap. The resulting spark fills the circular gap and is much bigger and hotter than a standard plug. They were reputed to be able to fire in an oiled up condition too, but I wouldn't like to try to prove that one.
Johnny
jwm
Active Member
googling around I just found this ... Spark Plugs
No these are not what I've got, but they do look interesting.
Near the bottom of the page are the Brisk Racing - Model LGS plugs.
These are close to mine, but they only have four nodes, not six.
Johnny.
No these are not what I've got, but they do look interesting.
Near the bottom of the page are the Brisk Racing - Model LGS plugs.
These are close to mine, but they only have four nodes, not six.
Johnny.
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