Two-stroke performance tuning?

[TZ350]

Your confusing me with Teezeetreefiddy.

So, what exactly have I been wrong about, given your "expertise" in two stroke tuning.......(nice expansion chamber by the way.........)

SS90 you are entertaining , but not very informative, no one would confuse my coherent posts complete with pictures diagrams and references with your to date insult filled error prone rambling’s.

That was Sketchys first attempt at a chamber, there was no need to mock him.

Your whole thread seems based around sparing with people and maybe thats your need but my advice is, ignore them and explain your opinions in a coherent way so we may all appreciate them.

Like most of us I have a traditional understanding of the function of the expansion chamber and scavenge patterns. I would have liked to have read about your understanding of them.

I see people have posted links to pictures or other web pages that have demonstrated their point, because it clarified what they were saying, you could do that too, and a few hand drawn sketches would help too.

But you went on and on completely missing the chance to explain your views.

I for one am interested in what you have to say.

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[SS90]

SS90 you are entertaining , but not very informative, no one would confuse my coherent posts complete with pictures diagrams and references with your insult filled error prone rambling’s.

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I simply give as good as I get Teezee.

The first stones where thrown from your "camp".

[gav]

Really?

Perhaps if you and your mates spent less time frantically trying to prove me wrong (and not actually reading what I write) all this may be easier to follow....... it get more and more disjointed every night I read it.

I wonder if you have less interest in two stroke tuning, and more interest in (trying, though never succeeding) to prove me wrong.

Just for fun, roll back read THE WHOLE thread...... you will see what I mean.

There is a dramatic difference between debate and pointless critisism...

Right here we see your enduring fault SS90. Rather than answer a query and try and help someone understand the difference between say a Kart pipe and a bucket pipe, you instead post up nothing of value and suggest he goes back and reads the whole thread. Which if he does still won't answer his query regarding the pipe design he asked you about.

[SS90]

Right here we see your enduring fault SS90. Rather than answer a query and try and help someone understand the difference between say a Kart pipe and a bucket pipe, you instead post up nothing of value and suggest he goes back and reads the whole thread. Which if he does still won't answer his query regarding the pipe design he asked you about.

hmm, perhaps due to his constant critical posts, I don't feel the desire to help him.

If, he hadn't behaved in such a way, we would already have discussed that. Instead we AGAIN find our selves at this point.

As usual, they just started immediately trying to disprove my statement (which AGAIN they have failed to do)

Does an expansion chamber "supercharge" a cylinder?

NO.

The more time that is wasted with such nonsense, the longer it takes to get the innformation out.

Logical?

I'm quite happy to have people disagree with me, but, I have posted nothing incorrect.

Can you show me otherwise?

I am GENUINELY interested in seeing what I have posted that is incorrect.

[SS90]

SS90 you are entertaining , but not very informative, no one would confuse my coherent posts complete with pictures diagrams and references with your to date insult filled error prone rambling’s.

That was Sketchys first attempt at a chamber, there was no need to mock him.

Your whole thread seems based around sparing with people. My advice is, ignore them and explain your opinions in a coherent way so we may all appreciate them.

I for one am interested in what you have to say.

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Well, Teezee, perhaps you could "gently encourage" your "entourage" not to make such personal attacks on me, and, have open discussion on such things, rather than "your wrong" (and then not proving me wrong)

secondly. What errors have I made?

please show some examples.

It would be nice if you could back that statement up.
In regards to Sketchy chamber...... I first saw the post, but said NOTHING....... it wasn't until HIS SECOND ABUSIVE POST that I simply "gave it back". Yup, I have made 2 absolute lemons of pipes (it's normal to name a pipe when you design it here..... I called my first one "DAS LIESTUNG DIEB" (the power thief) and I learned from it. So I (had) compassion for him.....he has twice posted abusive comments, what does he expect, chocolates?

[Cajun]

Mod Warning

We are getting sick of the complaints about abuse/attacks in this thread etc

If you guys can not keep it clean the whole thread will be moved to pd.

[TZ350]

I simply give as good as I get Teezee.

The first stones where thrown from your "camp".

Please.........

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[SS90]

OK Teezee,

Please, direct me to a post of mine this is incorrect.

I think it would be fair since you made the claim.

[TZ350]

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Well, Teezee, perhaps you could "gently encourage" your "entourage" not to make such personal attacks on me,
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I expect they thought they were giving as good as the got.

The boys did get a tune up about that,

have you felt slighted recently?

Can you give me an example.
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[gav]

hmm, perhaps due to his constant critical posts, I don't feel the desire to help him.

If, he hadn't behaved in such a way, we would already have discussed that. Instead we AGAIN find our selves at this point.

As usual, they just started immediately trying to disprove my statement (which AGAIN they have failed to do)

Does an expansion chamber "supercharge" a cylinder?

NO.

The more time that is wasted with such nonsense, the longer it takes to get the innformation out.

Logical?

I'm quite happy to have people disagree with me, but, I have posted nothing incorrect.

Can you show me otherwise?

I am GENUINELY interested in seeing what I have posted that is incorrect.

Well as far as the Supercharging part I posted the reference where some describe the effect of the pipe as supercharging the cylinder. You asked for where the term supercharging was used to describe the pipes action and I posted it.
But I agree, this term is very misleading and I'm sure most regard supercharging as relating to a mechanical supercharger that forces extra volume into the cylinder driven by a belt or a gear.
But anyway, you have plenty of opportunity to rise above their (whoever they are) actions, but still you find it necessary to play games as well. I thought school holidays were over?

[SS90]

Hmmm,
I'm quite thick skinned, so I am able to ignore most of it, but if you are genuinely interested perhaps we could look at sketchy's chamber (the original design) and "reverse engineer" it.

Looking at what each section means.

Maybe that is a good place too start.

[SS90]

Well as far as the Supercharging part I posted the reference where some describe the effect of the pipe as supercharging the cylinder. You asked for where the term supercharging was used to describe the pipes action and I posted it.
But I agree, this term is very misleading and I'm sure most regard supercharging as relating to a mechanical supercharger that forces extra volume into the cylinder driven by a belt or a gear.
But anyway, you have plenty of opportunity to rise above their (whoever they are) actions, but still you find it necessary to play games as well. I thought school holidays were over?

Hmm, yea My girlfriend doesn't get why I even bother....I generally do ignore it, but, you know, eventually you get drawn into the shit, it's just human nature.

In regards to the supercharging, yes, I agree, it's a terminology thing.

Fooman suggested "a dynamic super charging effect", and I think that would be the most accurate term.

The fact that the engine is not "supercharged" (it's a very very common mistake) is why you have to pay such careful attention to other factors.

Like f5dave said, a new pipe and an old cylinder (I would expand that to engine rather than just cylinder) don't always work......... high "extraction" designed pipes is one main reason.

Crankcase volumes (correct for the situation) and intake resonance are important factors.

[TZ350]

OK Teezee,

Please, direct me to a post of mine this is incorrect.

I think it would be fair since you made the claim.

I think there are a few but keeping it topical, any post where you claim that there is no supercharging effect from the expansion chamber.

A lot of literature says there is.

You will need to do better than a "because I say so approch". A coherent well thought out illustrated explination of your view could change my mind, untill then I have to hold to the conventional wisdom.

In holding to the conventional wisdom, its not for me to prove you wrong. Its for you to explain yourself in a way that allows me to see your right.

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[TZ350]

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But I agree, this term is very misleading and I'm sure most regard supercharging as relating to a mechanical supercharger that forces extra volume into the cylinder driven by a belt or a gear.
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Or it could be equally misleading to think supercharging has to be a mechanical device.

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[TZ350]

The fact that the engine is not "supercharged" (it's a very very common mistake) is why you have to pay such careful attention to other factors.
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You say its a "fact" its not supercharged, thats a strong statment in the face of so many sources saying it is.

As your the lone voice, can you explain why the strong negative pulse then positive pulse that charges the cylinder is not supercharging.

The negative pulse can be 7psi and the positive pulse much the same I expect. This is about the same pressure as delivered by mechanical superchargers fitted to road cars.

Maybe walk us step by step through the whole expansion chamber.

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