Converting a VW flat 4 to double the power strokes

[MVB]

Could one simply convert a flat 4 Volksy to run as a 2 stroke simply by adding a supercharger for scavenging, a wasted spark for ignition & a camshaft with (2 relatively narrow / steep) opposing double lobs on each cam surface, ie opposite each other?

[58 Plastic Tub]

[modok]

well, I disagree.
It is possible
but it would function poorly, profoundly poorly

Or, as we might say in the states.... Run like dog shit

I shudder to imagine it.

Put the intake ports in the barrel like a proper two smoke at least. Like a detroit diesel

[EVfun]

[oprn]

Or... just leave the engine as found and crank up the boost until you have double the HP.
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Our cars get old, we get old but driving an old VW never gets old!

[58 Plastic Tub]

See the highlighted font. He asked if he could "simply" do it.

The (correct) answer is "no".
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Stan Galat
"A single point in isolation is a reference point. Two points is a line. Three points is a trend. Trends don't lie."

[modok]

Well, yeah. Ok
Actually I loved your answer.

But I bet one could do a really bad job of it in a day and it could run, just enough to prove it can.
We agree it is not a simple job to fully prove what a bad idea this is.

People don't realize right away, that it's not gonna make any more power unless you can flow more AIR through it.

You've got twice as many intake strokes, but each stroke is only half as long, so perhaps it would move the same amount of air, except that whole intake too long problem just got twice as bad.
and
If the cam duration is only 140@ .050 how much lift could you even get? Not much

That's two of the many reasons you put the intake ports in the cylinder.

And I think it would be better to have variable timing on the exhaust valves rather than intake.

And the head can take more heat than the cylinder

So that's four

[EVfun]

A cheaper experiment might be to adapt a Trabant engine to the VW transaxle. It is a little air cooled 2-stroke. It would be less power, about 600cc and 25 horsepower, but if you want to hear the 2-stroke sound and smell the 2-stroke stink, it would be a learning experience.
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[67rustavenger]

[calvinater]

How about one of the old Saab two strokes?
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"Albatross"!

[BFB]

[58 Plastic Tub]

You might call it a poor attempt at a save, but it was my reason for posting. But regardless, I stand by my answer. It's not "simply" or "merely". It's dreaming.

Want to prove it's not?

Do it.
_________________
Stan Galat
"A single point in isolation is a reference point. Two points is a line. Three points is a trend. Trends don't lie."

[Alexander_Monday]

Certainly not simple nor easy, but I thought I would mention that there was a front engine drag bug with a vw engine converted to 2 stroke a long time ago.
No valves, Type4 case, one off billet heads and cylinders IIRC.
Sounded wicked.
I can't find the videos of it from back then, he passed away (Steve IIRC) so they may be gone.
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Alexander_Monday->What were the rings gapped at?
bedlamite->Almost enough.

[Alexander_Monday]

I did find these videos


Link



Link

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Danth’s or Parker’s Law:
“If you have to insist that you've won an internet argument, you've probably lost badly.”

Alexander_Monday->What were the rings gapped at?
bedlamite->Almost enough.

[busdaddy]

https://en.wikipedia.org/wiki/McCulloch_O-100
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[Dusty1]

You're lookin' for the Subaru 360 or the Saab Sonnet forum.

How 'bout a ported 360 with expansion chambers? Sounds like an old Artic Cat snowmobile. Might get you a ticket in a school zone.

.
.

[BFB]

[58 Plastic Tub]

Dude, look at the unedited, highlighted (in bold) first post.

You come in here every day looking for a fight. I'm not sure why.
_________________
Stan Galat
"A single point in isolation is a reference point. Two points is a line. Three points is a trend. Trends don't lie."

[FarmerBill]

Here ya go. Just drill some intake holes down low on the cylinder, weld the intake on the heads up, custom grind a cam for the exhaust valves, and slap on a blower. Easy peasy.

[modok]

Yeah, I love those old detroits. Miss hearing them in the fire trucks and big rigs. They could just sing. Haven't worked on one in a long time. Used to rebuild the heads for the army.
Still have a pile of spare rockers and bits for them, can't bring myself to throw it away, just very neat design. Check out the spring on the lifter!

Story was they'd never pass any kind of smog regulations.....but, they really gave up on that BEFORE any of this variable valve timing and high pressure electronic injection, and soot filters, and all that even hit the scene.

So it's a darn shame they went extinct, at least the small ones did.

There is still the opposed piston cummins ACE (advanced combat engine), but that's a thousand hp

I'd like to have maybe a small one, maybe a two stroke motorcycle that doesn't blow up every other season.