ESE's works engine tuner

[WilDun]

Aim feild road. Turn right at the end and then follow the gravel to the end.

Thanks guys, I hope I will be able to find the time to go there.

[chrisc]

The following content you are about to see is classified and only recently has been released to select kiwibiker viewers for analysis. This is brought to you by experts in the field who braved much danger to bring you images from behind roller door lines.

This unidentified alloy structure has been said to contain variable moving technology which enhances power delivery beyond that of any normal two stroke infantry man.



A close up of the inner workings of the structure revels alien technology



Like crop circles in adjacent fields, this structure has yet to be deciphered by any human being



These two clearly suspect looking extra terrestrial beings were also identified possessing the previously unseen ability to both increase power AND decrease in their unidentified machines.

[chrisc]

from Christopher on Vimeo.

Quote: Fuck yeah! End Quote

[Bert]

Love your work gentlemen...

Some very nice out of the box thinking. Going to make one very nice sidecar engine

[Drew]

Two watercooled scooter motors, twin crank tandem style driving on V belt might be the go for my sidecar I think. Unless I buy shares in Devcon to alter the cases for a single reed/24mm carb and reverse port the GT lump.

[WilDun]

This unidentified alloy structure has been said to contain variable moving technology which enhances power delivery beyond that of any normal two stroke infantry man.

[/IMG]

When you fitted the new front crankcase, how difficult was it to get the shaft centers the correct distance apart and properly aligned? - I'd be willing to bet it took a bit of very careful engineering!

Will.

[TZ350]

An interesting bit of chit chat about the big bore Aprilia RS's ....

http://www.apriliaforum.com/forums/a.../t-246083.html

[190mech]

Ive grafted a 2T motorcycle engine to a scooter CVT with some sucess,details here;
http://49ccscoot.proboards.com/threa...gscooter-build

[husaberg]

I no nothing about these? but are they a CVT with chain? I see no Gear lever?

http://www.ebay.co.uk/itm/1992-JAWA-...B:FSEL:GB:1123

Maybe not oh well.
http://www.jawamoped.com/html/f_a_q_.html

[F5 Dave]

Yeah you can see the bull Steve spins. Hes off on tangents and has no friggn idea what he's on about. Takes people in though as he spins a good yarn. Calvin died not too long ago.

[TZ350]

When you fitted the new gearbox housing, how difficult was it to get the shaft centers the correct distance apart and properly aligned? - I'd be willing to bet it took a bit of very careful engineering! Will.

Getting the center distance is no problem as the idle gear position can be adjusted and shaft alignment is not that much of a problem either as a bit of gear noise wont be a problem, things don't have to be perfect.



This is Chambers side car project and he has arranged things so that when the GP engine is at 12k the front CVT shaft is spinning at 7k which is about what we think is the std working rpm of the GY6150 motor that the CVT parts came from. Of course final tuning of the CVT can be done with springs and slider weights.

[TZ350]

NedKellys 50.



10.8 purple line Ex opens 87 deg atdc duration 186 deg and original fat pipe.
11.0 green line Ex opens 87 deg atdc duration 186 deg and original fat pipe -30mm from the mid section.
11.0 red line is Ex opens 87 deg atdc duration 186 deg and Frits pipe.
12.0 blue line Ex opens 81 deg atdc duration 186 deg and Fritz pipe.



11.0 red line is Ex opens 87 deg atdc duration 186 deg and Frits pipe.
12.0 blue line Ex opens 81 deg atdc duration 186 deg and Fritz pipe.



The timing for the Frits pipe was supposed to be Ex opens 84 deg atdc for 192 deg duration but I over cooked it and wound up at 81 atdc and 198 duration. As is the transfers were correct at 115atdc duration 130 deg. I found this little cylinder quite hard to work with accuratly. I guess the smallest of errors are magnified when your working with such small dimesions and horse powers.



This is the first one of these small aftermarket cylinders I have worked on. Its pleasing to see that they can be ported without the nicasil pealing off. The technique is to first carefully grind a champher across the top of the port, this leaves a neat champher in the nicasil and a guide for grinding the exhaust port too. But I found it very hard to be accurate. The problem was after setting the piston at the correct position I scribed a line across the top of the piston and the width of the scriber made the line to high.

Next time I will be more careful and and grind the champher in stages, and re check the cylinder on the engine with a degree wheel until the timing is right. Then use the champher as a guide for porting the exhaust port. The nicacil is very hard and I had to grind it with a dremmil but the alloy of this cylinder very soft, much softer than the Suzuki GP cylinders.

[TZ350]

Packing and of to Tokoroa now ..... see you guys there.

[wobbly]

The Fritz pipe is very short and is designed to use port resonance with the 192* duration, that is why it generates the big fat rounded power curve.
The pipe using 198 duration is then way too short and has no mid power at all.
Drop the cylinder to get the Ex at say 82.5 atdc and you will get a combination of the fat power band and the good overev of the high duration setup.
Depending upon the transfer layout you could then try reverse stagger on the rears, by grinding them back up, like an Aprilia.
But this will reduce the blowdown, and you will probably loose some peak.

[TZ350]

Thanks I will try that, hopefully the cylinder as is survives the GP.