ESE's works engine tuner

**wobbly** · 23rd September 2014, 08:08

Na, link is NFG

**Yow Ling** · 23rd September 2014, 08:10

Originally Posted by husaberg

Odd it works for me?
Is it the same for others?
There will not be much in there you have not seen before Frits

Works for me , maybe you need a NZ passport?

**F5 Dave** · 23rd September 2014, 09:19

Not me. pretty sure I was born here.

**WilDun** · 23rd September 2014, 09:39

Doesn't work for me either, - maybe I shouldn't have said all those things about Telecom, - sorry, I mean Spark! - or is it my passport? Maybe I should have voted for Winston, I dunno.

**husaberg** · 23rd September 2014, 11:22

I will ask the Lord of the forum to look at it.
I way be a quirk of me being logged in and windows 8.
I am at work on W7 so i will try again
For some reason widows 8 will not let me post an embeded link in text either.

Later
Ok i have put the links in again this time using the link button rather than just picking them up as a url.
I have pm'ed Mr Trousers as well.
if not click on Husaberg go to albums.
I still have plenty of stuff to load but there is not much new, just easier for me to find stuff.

Later again
Ok this is what the site admin said...
IT's not KB, it's not me, its you......

Originally Posted by Mental Trousers

The server is running perfectly fine and I've tried with 3 different browsers and they're all good too.

As long as the album is set to Public there shouldn't be any problem. If people are having problems it's usually something to do with filtering, either their ISP does some spam filtering and blocks them, or it's settings in their browser, or it's internet security type software.

Cheers.

Mr trousers.

**2T Institute** · 23rd September 2014, 13:44

Says those links are on the "dark side" I don't want to know what you have to do to get over there

**FastFred** · 23rd September 2014, 15:04

Originally Posted by husaberg

... click on Husaberg go to albums. I still have plenty of stuff to load but there is not much new, just easier for me to find stuff.

Great to have the pictures and hopefully magazine pages from you vast collection of posts in one easy accessible place.

**lodgernz** · 23rd September 2014, 17:01

[QUOTE=chrisc;1130773171]Today I found these somewhere deep in the ESE thread. Worthy of a repost I think.
Av on Scott's RSGP125 around Mt Welly.

Who's that on #88? Bit of a rocket

**FastFred** · 23rd September 2014, 17:17

Originally Posted by lodgernz

Originally Posted by chrisc

Today I found these somewhere deep in the ESE thread. Worthy of a repost I think. Av on Scott's RSGP125 around Mt Welly.

Who's that on #88? Bit of a rocket

Nathaniel D, proving that you can be fast but to be first you first have to finish. A lap later you can see him picking himself up off the track.

Nathaniel is a very good up and coming rider with plenty of talent. It would be good to see him at the BOB.

**husaberg** · 23rd September 2014, 21:15

Originally Posted by husaberg

I ve got some Dentist bits if he wants them, l but they are tiny they would be more useful for drilling small items like teeth.

Desaxe

I asked the panel a while back about offsetting cylinders ala YZF450 and Scott and Kawasaki ZX10R.

What i didn't know it comes from the steam age and a lot of aero engines were like this this is what i came up with today whist looking for something else.
I am still trying to model this with a 50mm 50 engine to see the results as my maths is crap and drawings are proving inaccurate.

http://en.wikipedia.org/wiki/Desaxe

http://ashonbikes.com/content/d%C3%A9sax%C3%A9-engines

http://www.iroquois.free-online.co.uk/merco/len.htm

And this
http://hellforleathermagazine.com/20...ed/#more-13281

Attachment 256340

And more curiously this on the Bantam thread.
http://bsabantamracing.editboard.com...-configuration

Can Frits add some info to the RSA bit of the story?

Originally Posted by TZ350

PatAT Asymmetric Timing in Two-Strokes

Attachment 300849

http://www.homebuiltairplanes.com/fo...o-strokes.html

Asymmetric transfer timing, I have no idea if it works but its an interesting idea ....

Originally Posted by husaberg

Frits covered it further back........ Yamaha achieve it via offsetting the crankshaft and cylinder on quite a few modern bikes. ie YZF450
The port timing can be made asymmetric on a two stroke.
I think TZ ran the sim up to 12mm?

Originally Posted by senso

Up to 4mm would be easy to do, just mill the crankcase off-set and add some guide pins, more than that would need welding, but given the over-squareness of 54x44mm its a strange layout to work with, the exhaust pipes need much different sizes when compared to a more conventional square or almost square engine, the combustion chamber is also stranger and more difficult to react to some changes talked here.

I found it

Originally Posted by husaberg

Thanks for your reply Frits and Grumph I actually thought the offsetting might decrease the stroke but i guess my cockeyed math was a little crap.

But to save me stealing my kids compass and protractor would moving the cylinder forward or backwards actually have the same effect as the offset of the pin?
No doubt fits or wob can click a few keys on the keyboard? if not i will try to draw it out to see old school style. the 12mm offset did seem to make a meaningful difference on the sim with no other changes to spec to suit. it may have been a lot less reliablw though no doubt. Slapwise

Below is the Swiss Auto/ ELF/ ROC /MZ /Pulse V4 500 GP bike Bill Bucley has a Pulse 500 don't know if that has a ROC frame but i guess ir does.

Originally Posted by Frits Overmars

If I remember correctly (1926 is some time back) the Garelli 350 Competizione was a split single allright, but unlike the later DKW split-single racers it did not have forked or articulated conrods. The Garelli was a normal 360° (both pistons rising and falling simultaneously) parallel twin with three transfer ports in the left cylinder and two exhaust ports in the right cylinder. Both cylinders shared a common combustion chamber. Each piston commanded two carburetters. Also unlike the DKWs, the Garelli had no auxiliary pump cylinder or blower of any kind.
I do like the look of the Garelli's exhaust pipes. It is the oldest bike I know of with such modern-looking pipes. Using diffusers to promote suction was not yet common practice then, and adding end cones would be regarded as revolutionary 26 years later! But I suspect that neither the exhaust timing nor the blowdown time.area of the Garelli did the end cones much justice; they were probably shaped like this just to accomodate the fish-tails.

I would not bother with offsetting cylinders or piston pins to achieve asymmetrical timing. The effect is very small and who needs the complication.
The pic below shows a calculation I did on the Aprilia RSA125. I gave it an offset of no less than 10% of the stroke in order to enhance the effect.
It is obvious that the maximum conrod angles become asymmetric. What may be less obvious, is the increase in piston stroke for a given crankshaft stroke!
It is also remarkable that it takes more than 180 crank degrees from TDC to BDC, and less than 180° from BDC to TDC.

Below is the sim Rob did it took bloody ages to find it.......

**Frits Overmars** · 23rd September 2014, 22:28

Originally Posted by husaberg

If you can't get it to work click on husaberg (at the top of this post then view profile and then albums

Yeah, right:

vBulletin Message

Invalid Album specified. If you followed a valid link, please notify the administrator

**husaberg** · 23rd September 2014, 22:35

Originally Posted by Frits Overmars

Yeah, right:

vBulletin Message

Invalid Album specified. If you followed a valid link, please notify the administrator

This is doing my head in Maybe I should remove the word porn from the post.
Maybe as mental said it is likely your security settings, there is nothing in their that is too dodgy other than the Yamahas and old British stuff?

**Frits Overmars** · 23rd September 2014, 23:37

Originally Posted by husaberg

This is doing my head in Maybe I should remove the word porn from the post. Maybe as mental said it is likely your security settings

I just checked: more porn than you can shake your stick at. So that's not it.

**richban** · 24th September 2014, 07:57

Ignition timing.

I have a question re timing. At the moment 300 engine I am working with has plenty of timing at peak power. Like 14 degrees. I ran it for a race weekend and test day and then inspected the piston and head. All looked great. It was running strong cool and making the most power so far. My question is how much is to much. Is the old thinking of chuck in advance until it stops making power still valid or is there just a place you should not go. I ask this as I am fascinated with the cylinder head changes I made and wonder if we had put more advance in weather it would have brought the power back up. As the MSV was lower.

Cheers Rich.

**Yow Ling** · 24th September 2014, 08:06

Originally Posted by richban

Ignition timing.

I have a question re timing. At the moment 300 engine I am working with has plenty of timing at peak power. Like 14 degrees. I ran it for a race weekend and test day and then inspected the piston and head. All looked great. It was running strong cool and making the most power so far. My question is how much is to much. Is the old thinking of chuck in advance until it stops making power still valid or is there just a place you should not go. I ask this as I am fascinated with the cylinder head changes I made and wonder if we had put more advance in weather it would have brought the power back up. As the MSV was lower.

Cheers Rich.

Maybe you should get a detonation sensor, then you will know when too much is, the other way is more destructive.
Do you have an ignitech? The det sensor box comes with an output that makes the ignitech retard a few degrees (or whatever you set) when it starts knocking. They cost $40 plus a sensor.
Cheap insurance

Ok they actually cost $68 http://www.ebay.com/itm/Knock-gauge-...e9e926&vxp=mtr

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