Want +20% MPG? Bam, Here You Go - Autoline:

[freebeard]

But this is something very easily turned on a lathe.... Then you need some taps and dies and the right size drill and that's about it.

A measured drawing would be nice.

It's like 'America' has forgotten howTF to make anything!?

I thought this was a field modification. Not Okay?

[Logic]

Originally Posted by freebeard

A measured drawing would be nice.

I thought this was a field modification. Not Okay?

Pulling your leg! LOL! Always fun with you!

You go to the website aaand! "Product isn't yet available" Sigh..!
For something like this, my immediate reaction is: "Off to the lathe then! I want it in copper anyway.
Stop that video where he's showing the plug to ~get the dimensions!"

You will have to do things to your jets and timing too, so; not a "I do gots a Walmart plug spanner!" thing no.

[freebeard]

I had a look:

https://pulse-jetignition.co.uk/

It looks like the trick would be in indexing the spark plug in the adapter and indexing the adapter in the head.

Pulling your leg!

I'm on friendly terms with a Volkswagen mechanic. It's a talking point; I'm curious about his opinion. He's got Golfs and Vanagons and my stroker 1776 (barter for the new steering gearbox in the Superbeetle, and whatever I need next).

edit: I'd still like to know what to expect in fuel mileage.

And what kind of airplane gets an R32 engine?

[Logic]

Originally Posted by freebeard

I had a look:

https://pulse-jetignition.co.uk/

It looks like the trick would be in indexing the spark plug in the adapter and indexing the adapter in the head.



I'm on friendly terms with a Volkswagen mechanic. It's a talking point; I'm curious about his opinion. He's got Golfs and Vanagons and my stroker 1776 (barter for the new steering gearbox in the Superbeetle, and whatever I need next).

edit: I'd still like to know what to expect in fuel mileage.

I think the only way to know the fuel consumption for sure is to try it (changing timing and jets etc) and see! As always..!

NB that the piston is moving very slowly during that valve overlap, TDC period.
So with an injector spraying a constant amount, you get rich mixture at this, pre-chamber filling, point. Not the case with a carb...

Also NB that unless you have a turbo; valve overlap filling relies on exhaust gas momentum and tuned exhaust and intake lengths which tend to work better at higher rpm/gas velocities.

I would say that for an otherwise stock engine you never want to rev above 3 revolutions per day, killing the reversion that happens at these rpms is a better bet.
Remember my Reed valve in the intake post?
If you want to run super hot cams; it's an even better bet!
Super low rpm will benefit more from a completely different cam/timing without overlap and be a LOT quieter for it.
Also NB that mixed and boundary lubrication is more prevalent at low rpms...


Here's another ignition trick you can pull off with nothing more than a soldering iron and 3 capacitors.
(From Walmart! )
https://www.youtube.com/shorts/aiKVEbnnoTY
See the rest of his channel for The How etc.
NB that you will probably have to retard ignition a touch to get better mpg.
(That's just a simple start. You might add a diode and a ~600V? base voltage and 'cut off' the negative electrode... Especially interesting in a pre-chamber!)

Originally Posted by freebeard

And what kind of airplane gets an R32 engine?

The rules for experimental and ultralight aircraft are a lot looser and people are always looking for 2 cylinder boxer engines that fit under a/the cowling nicely.
Half a beetle engine is 'A Thing' too.
From an economy POV; how they implement twin spark (plugs) is interesting.

To self: Now lets try to get back on topic shall we!

[guudasitgets]

intresting

[Logic]

Originally Posted by freebeard

I had a look:

https://pulse-jetignition.co.uk/

NB that that is NOT the correct 'picture':
The plug is longer and a lot thinner to fit inside the chamber.
That looks like the std plug, not the Suzuki Hayabusa motorbike plug he uses.

[cRiPpLe_rOoStEr]

I have already seen some attachments for spark plugs, yet they didn't feature such prechamber design.

[Logic]

https://www.youtube.com/watch?v=GH3TNiRERU4

[Logic]

Originally Posted by freebeard

Any idea what part that adapter is? Asking for a friend.

These Dorman Anti Fouler 'gizmos' may be moddable? [shrug]
Some of the ones shown seem to have what might be called a very large nozzle.
I dont know 'your mechanic', so I cant say ask him.

(I NB that most people's OPINION on snakes is:
"The only good snake is a dead snake"
That works well (except for snakes) if you don't know a damn thing about snakes and therefore don't know which are non venomous.
NB That for most, the same attitude is taken toward everything they know F-all about, with no intention of ever gaining knowledge on the subject... )

https://www.youtube.com/watch?v=wDU-X484St0

[freebeard]

The 06-20 video was helpful. I now am convinced the prechamber is filled efficiently, but now I have to worry about how it is exhausted. As per usual, my basis for understanding is a carburated flat four. So I can see the dual spark plugs because that's common practice in aviation, but I don't see how to deal with the hot spot created in the head that wants additional cooling.

Anaconda: The Educational Version.