ESE's works engine tuner

[peewee]

unfortunatly i reside in the land of yanks but want no part of their ' in doubt bore it out mentality'. for pete sake theyre still using 115 rods on 64mm crankshafts. dont bother trying to tell them any different as they wont hear of it

anyways on to something worth talking about. pretty sure it was frits who posted this some time ago. does anyone know something about it ? looks like a great idea but why dont we here more about it http://www.zeroshift.com/

[husaberg]

unfortunatly i reside in the land of yanks but want no part of their ' in doubt bore it out mentality'. for pete sake theyre still using 115 rods on 64mm crankshafts. dont bother trying to tell them any different as they wont hear of it

What size is that KTM again?

[peewee]

i reduced the bore 3mm and lengthened the conrod 4mm . far as i know theres no longer conrods available to the public

[husaberg]

i reduced the bore 3mm and lengthened the conrod 4mm . far as i know theres no longer conrods available to the public

Kawasaki KX500 is a tad longer and I think the Husky rod is longer again, assuming you are using the CR500 rod.
It still started life as a KTM550.

[F5 Dave]

That Bud Aksland did all right, surprised you forgot about him Dave.
Attachment 313570

Center of the Pic, propping up Kenny Roberts.
Attachment 313571

I thought i did by association. Evil Empire being Kennys crew.

[husaberg]

I thought i did by association. Evil Empire being Kennys crew.

Isn't that HONDA crowd normally the evil empire.

[F5 Dave]

That was later but for a while Kenny's team had all the best riders and most cancer stick money, biggest transporters etc hence the pit moniker. Or so the magazines put it. I of course wasn't there.

[Frits Overmars]

frits maybe im wrong on this but isnt the port timing of a modern 2t engine mostly useless numbers as its only the point where the window opens and closes relative to crankshaft degrees with no regard to time area or angle area ? you could have a tall window and still a small angle area.

If the timing of a port would be a useless number, then so would be the port width, wouldn't it? I'd say neither is useless, but only together are they meaningful.

was there ever a usa 2t racing team worth mentioning ? it seems as if the usa tuners are 100 miles behind the rest of the worlds tuners. advancements in recent 2t development dont seem to be associated in any way with usa. im trying to think of one thing they could take credit for. even with some fairly modern designs like ktm to look at, they seem oblivious to the fact they could apply some of those ideas to older engines. maybe they like being stuck in 1980 with short rods, over sqaure pistons and small crankcases

There are quite a few capable two-stroke specialists in the USA but their names are not generally well-known, as opposed to the 1970s and 80s when we had Erv Kanemoto (100% American in spite of his oriental-sounding name), Kevin Cameron (still a highly appreciated technical editor), Don Vesco, Bob Work, Kell Carruthers (originally an Aussie who became chief whip in Kenny Roberts' team after having been a 250 cc world champion himself), Bud Aksland, and many others.

[seattle smitty]

unfortunatly i reside in the land of yanks

So sorry for you . . .

[AndreasL]

I've not used that method personally but I'd guess that better control of just where you're heating and a cleaner working area would make it better overall.
Better than oxy acetylene at least...

Thanks Grumph!

[2T Institute]

was there ever a usa 2t racing team worth mentioning ? it seems as if the usa tuners are 100 miles behind the rest of the worlds tuners. advancements in recent 2t development dont seem to be associated in any way with usa. im trying to think of one thing they could take credit for. even with some fairly modern designs like ktm to look at, they seem oblivious to the fact they could apply some of those ideas to older engines. maybe they like being stuck in 1980 with short rods, over sqaure pistons and small crankcases

There are some very good US 2T tuners like not that well known like Eric Gorr, then there are the slippery "salesman" types like Pro Circuits Mitch Payten, who still knife edges transfer dividers and charges as much as a small family car.

Erv Kanemoto was as good with frames and fabrication as he was with tuning engines.

[peewee]

Kawasaki KX500 is a tad longer

yes 1mm but if i recall it has a odd wristpin at 19mm where as the honda is 20mm and it just so happens the honda piston fits right in the 500 ktm cylinder. the last husky 500 i know of was around 1987 or so. parts must be rare as hens teeth by now.

It still started life as a KTM550.

it may have started there but it ended somewhere else . the aux exh ports poped open under the piston at tdc, the rod and piston were very short, case ratio around 1.5:1 from what i remember. i dont know why anyone would bother with those headaches

back to the 'when in doubt bore it out' theme for a moment. those same yanks might be the only folks selecting fuels based on static cylinder pressure. i thought about it a few times and couldnt find any connection between fuel type and cylinder pressure at 300rpm. last i heard, compression gauges were used when buying second hand cars

2T institute, most everyone over here is still knife edging all the dividers, yes even the yamaha twin cylinders. dont ask me why as i have no answer

[jonny quest]

Angle areas are not the limiting factor in a two stroke. Friction is.

[F5 Dave]

Ahh well you need to use Amsoil


(1200 pages & I'm going to crash it now by turning it into the dreaded oil thread)

Here come the zealots, run!!

[husaberg]

Angle areas are not the limiting factor in a two stroke. Friction is.

Here is me thinking it would be thermodynamics or physics.