Because the future may be 100cc I am starting to research it. Converting a RG150 water cooled to a 100cc, I have heard people say they had problems with the transfers and I suspect the problem was port/duct velocity.
From the Porting School:-
"So what we can say at this point is that a significant proportion of an engines flow through depends on port velocity as well as the generation and utilization of pressure pulses. This means even a little excess in terms of port area can hurt power even though it may, on the flow bench at least, flow better."
More here:- http://www.gofastnews.com/board/tech...t-volumes.html
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Oh, there is more than the Otira Gorge (some secrets we never told!)....you filthy GP engine stealing "GO CARTER"
As for Fiddlers lessons, my favourite classes of his where
"catching a ride down Manchester street on a Range Rover"
and (my second fave)
"Love thy Neighbour"
GN125R indeed!
Now, go change some tyres!
Quite right speedpro, and certainly so much of the technology that the Japanese developed is being used today (as, in reality, the Japanese have stopped developing two strokes)
However, my point is that (rather than going through all my posts, to prove it) Thomas come back from Nam, and all of a sudden, Teezee starts "coming up with all these good ideas (I mentioned months ago "look at Japanese 125cc cylinders", and months ago, Teezee asked me "for clearer hints", and only last week, I told him "Honda RS125"
Lately, I even posted pictures of my latest work.
Basically, Logically, realistically, this level of two stroke tuning DID NOT COME FROM VIETNAM...it's all stuff I have mentioned here prevoiusly, then, all of a sudden I am "stealing Thomas's ideas"
WHAT IDEAS TEEZEE?
A peaky, high exhaust port duration, over advanced, too rich, incorrect primary compression rato'd, shrouded transfered,not retarding ignition two stroke with an exhaust design than was on the Millenium Falcon?
Naaa, Been there, done that. Years ago.
I am 100% confident that Wobbly will not say " Oh yea, we learned all our knowledge from Vietnam"
Think about it.
if Thomas knew what you are now posting in NOVEMBER of last year, he would not have built the peaky shit box he did before I started posting
SS90 there is something disturbingly odd about you.
I have watched the posts with interest. I have seen SS90 push crankcase compresion ratios and hint at the more modern way to the point of being overbearing, with a bit of a "bee in the bonnet" hysteria.
TZ has followed up and done his own research, sharing the results with us all the way. Who knows where TZ found Tomas but you can bet there were more people than just Wobbly working on the BSL project.
Hmmm, I'm not 100% sure what you point is there, and this really has gone out of control.
I have given quite a few good hints here, and, in my opinion (and others) Teezee is giving Thomas all the credit (not that I did all that in the pursuit of glory), I just read some very wrong information and was offering advise (correct advise) based on experience.
Now I'm being accused of "stealing Thomas's ideas"
What Ideas?
A peaky, high exhaust port duration, over advanced, too rich, incorrect primary compression rato'd, shrouded transfered,not retarding ignition two stroke with an exhaust design than was on the Millenium Falcon?
Did that when I was 15. (as have so many people before me)
Actualy your input has never been more than reciting the basics and some vague hints. I expect that TZ in asking for clearer hints was just trying to draw you out to see if you actually had any real "stuff" to offer.
As for your pictures, cutting gully ports in a barrel is mentioned in Jennings book and probably Bells too.
You can't claim ".it's all stuff I have mentioned here prevoiusly," as you have not actualy mentioned anything of substance like TZ has, your hints are just that hints, vauge things that can be used later, for "I told you so" or "That was my idea".
TZ's done the research, your just trying for the glory.
Really?
Just reciting the basics?
And, pray tell good fellow, what have YOU offered this thread?
Because, of course, you knew it all didn't you.
Because you think a A peaky, high exhaust port duration, over advanced, too rich, incorrect primary compression rato'd, shrouded transfered,not retarding ignition two stroke with an exhaust design than was on the Millenium Falcon
is a good engine huh?
As clever as TZ is, he has been avoiding a few of the basics, like a good ignition and doing a few dyno runs. That has changed now which will only bring bad news for the rest of us. In attempts to gain power a few of us have headed down the blind alley of making ports bigger etc. TZ is taking a more considered approach, one which it's taken me a few years to cotton on to. Hopefully he will be too old to ride it properly once it is all sorted.![]()
The Mods don't like to step into such worthwhile technical threads, but this is getting a bit silly.
Can everyone please move on from this childish bickering.
Cheers.
Can I believe the magic of your size... (The Shirelles)
Yep I am pretty convinced about dyno's now for sure. We just didn't get around to building one at work as quick as I hoped, it all just takes so much time. I am lucky to have Tomas's help with getting things done on the bike, now that he is back we should start getting somewhere.
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