Messages

16

Non-Moto / Electric bike wins pikes peak event. Whhhuuuuttt???

« on: July 02, 2013, 01:51:31 AM »

by .6 of a second... " title="Roll Eyes" class="smiley">

The only thing holding back electric bikes is weight/price/inferior battery tech(Which is the cause of all three problems). The problem with the future of electric vehicles is that its only going to get more expensive...

Doubt that.

Battery development is expensive beyond belief. Supplying electricity to charge batteries national supply and demand would be insane as well, it would bankrupt the USA 10 times over..

People claiming that are either uneducated or have an agenda.

It simply doesn't add up.

The price saved in gasoline would by far offset the new infrastructure which would be either privatized or constructed on borrowed money. Either way, the trillions of dollars saved on gasoline over two decades which fully funds the upgraded power generation, distribution and supply costs.

17

Non-Moto / My 380 road racer project

« on: July 01, 2013, 10:37:40 AM »

Where did you get that pipe? Is it a scalvini pipe?

No mas produced rubbish here mate, about 100 hours of labour went into designing and making this pipe.

18

Non-Moto / My 380 road racer project

« on: July 01, 2013, 08:22:16 AM »

Here we go guys, an update from the weekend...

As expected, we got painfully close to firing up the bike for the first time.
We were just short of a few engine mount bushes and perhaps a roller starter.

What we did achieve though was some bloody good progress over a solid 3 1/2 days in she workshop. The bulk of the time was spent finishing off this absolute beauty of an expansion chamber which took the two of us a solid few days to complete.
The rest of the time was spent doing the other odds and sods required to complete the bike including coolant/plumbing, installing and wiring up the ignition, fuel delivery/overflow/vents, carb jetting and generally checking over the entire bike to find any outstanding issues.

All in all we ended up with a 99% complete bike that just requires a head stay and PV system prior to being brought back to Melbourne where I will finish off the little details myself (paint, dyno tuning, CNC rear caliper bracket) over a few solid weekends.

Mocking up the last few pipe sections, which we definitely the most difficult as the had to fit between the swingarm, rearsets, rear tire and come out under the bike at the correct angle for aesthetics.






The new headstay and frame mounted bracket,


The finished pipe













We've also organised for an A-grade rider to help us set up the bike and race it in a couple championship races to see what the bikes full potential is. I'll be riding it also in between.

Hopefully I'll have the bike freighted back to me in a few months where I can finish off the final details before entering in a few events.

19

Non-Moto / My 380 road racer project

« on: June 28, 2013, 12:52:54 AM »

I saw this cool project on another site (KTMtalk?) some time back, was wondering about its current state. Cool to see it so close to alpha test.

What performance do you expect to get out of the 380 versus a twin cylinder mill (RZ/Apillia)? I would think the 380 is significantly lighter but if you breathed hard on both the smaller jugs would be better at sheer horsepower for a road racer?

How do you isolate the engine vibrations from the pipe? Flex header or flex mounts?

At the momment we are aiming for 65 horsies at the rear wheel with silly amounts of torque at all RPMs. We were aiming for even more with a one-off racing cylinder prototype but I think 65hp and 70 nm and 105kg is enough for now
It wont quiet have as much top end as my 85hp 421 banshee/rz motor but it will be quicker around a track due to its usability and lack of weight.

20

Non-Moto / My 380 road racer project

« on: June 27, 2013, 02:15:35 AM »

Thought I'd do a little bit of a post regarding my long term build project, a KTM380 road racer.

The bike is now nearing completion after a few years of planning and work.

Im heading up to 2t-institutes workshop this weekend to spend a solid few days working on it with a small chance of being able to fire up up, but a big chance of getting painfully close.

This is where we're up to with the project







Isoelastic mounted engine




rear end veiw





Cagiva GP593 inspired nose cone



Almost finished pipe, made by 2tinstitute




On the stands, almost finished

21

General Two Stroke Talk / yz 325

« on: June 26, 2013, 01:12:08 PM »

Blade powervalves are never a good idea.

they close a low RPM leaving the exh boost ports wide open.

So the first pulse of hot exhaust gases are passed through the boost ports instead of the main exhuast port. This not only reduces the effect of the exhaust valve but also makes the area around the boost ports very hot which can lead to seizures etc etc.


Im not sure why they didnt just take the time to use the stock powervalves, abeit modified to suit the new bore?



Although Im sure they are half decent cylinders, if it were me I would opt for a 295cc rebore/nikasil/port job from Eric Gore ... why fuss over 25cc's!

22

General Two Stroke Talk / KTM Fuel Injection.

« on: June 08, 2013, 11:23:46 AM »

What a crock of ****...

I dont see any reason why you couldnt still change a piston at home... they've been using high pressure DFI on snowmobiles for years and rebuilds are no more difficult than any other.

23

General Two Stroke Talk / Original piston?

« on: June 01, 2013, 02:41:01 AM »

no need to pop the head off before buying guys,

just purchase a cheap endoscope and then pop the exhaust off and insert the camera... allows you to inspect the bore, the piston dome, piston skirt and ports....

perfect

24

General Two Stroke Talk / Original piston?

« on: May 31, 2013, 04:29:59 AM »

OIL DOES NOT EQUAL RICHNESS

once rebuilt check your jetting to avoid it happening again, or get the shop to tune it for you if you dont know how

25

General Two Stroke Talk / Original piston?

« on: May 30, 2013, 11:33:50 AM »

This isn't in its peak I don't think! HA

the surface finish would either suggest youve cleaned it, its new, or its running rich (not hot enough for carbon build up)

but contradictory, it seems that there is detonation marks around the perimiter of the dome which suggests your running too lean, too much advance, too high compression or ****ty fuel. Or a combination of any of those.

so perhaps during this pistons life it has encountered detonation at one point (deto marks but not regular enough for carbon build up) but for the majority of the time she runs rich

26

General Two Stroke Talk / YZ 250 EFI

« on: May 15, 2013, 05:55:44 AM »

Probably not possible to have a phone app run injectors. Uniflow will correct me if I am wrong but that requires an operating system that specializes in "real time" operations. There needs to be a very direct connection -- with no delay -- between what the CPU wants and the device being controlled as well as in the other direction from the sensors to the CPU. With windows,linux,android etc OS there are many layers that let the computer do many things at once but none of them with real time response. Humans are slow enough that we don't notice it but an injector sure would.

That said I am sure the components on that link computer are pretty darn cheap on their own and fabbing a special purpose board is not that pricy. Its the software NRE that costs the vendor plenty. If enough units are sold then its easy for the price of the whole shebang to come down. But any manufacturer building a bike that gets into mass production is probably going to end up building their own system so development systems like this link are not cost effective either -- and stay that way.

Uniflow -- for your system, how many inputs and outputs are you using? Ambient temp and pressure? O2? throttle position? Rpm (and/or crank position)? Cylinder temp? exhaust temp? Are the only outputs for the injectors? Is there another for the fuel pump? Other outputs? And the link to your laptop -- that is USB? I still think having a WiFi or bluetooth connection with be way cool. Never even bother with a cable connection.

The Link is a versatile little unit. As well as running the injectors we have outputs for many other operations, power valve, pulse oil metering pump, more injectors timed differently if needed, shift light, cooling fan, fuel pump drive lots of stuff. We are only using one injector drive ( although that may change) and the fuel pump drive, also might add the oil pump drive. The fuel pump drive only turns the pump on when the engine is turning over so when you stop, the pump stops. You can also have up to three overlay maps running at the same time for real fine tuning, or injection start point changes. All good useful stuff.
Inputs at the moment are TPS, rpm, engine coolant, ambient pressure and chamber pressure drives the fuel regulator. I did also set up a sampling valve to the crankcase, a small valve wired to the injector drive so the computer was only able to "see" the pressure in the crankcase as the injectors fired not all the other pressures. I don't want to put anything in the exhaust that will affect the way it runs, no sensors that will protrude in. We might have the system too simple? but it seems to go alright. I'm freshening up my YZ, new piston kit, new pipe ( same as the EFI bike ) so we can get a good comparison.

sounds like your link computer would be able to handle a servo controlled 24/7 reed inlet valve
would make it just as quick as a disc valve motor!

27

General Two Stroke Talk / YZ 250 EFI

« on: May 14, 2013, 07:50:28 AM »

Something like that is getting more and more possible these days.

i wonder if anyones been smart enough to create an adroid or iphone app?

you can plug your harley davidson into an iphone and run the tacho through the phone screen, so wouldnt be much harder to install software to control injectors

28

General Two Stroke Talk / TRIBORON!!!!!!

« on: May 13, 2013, 10:48:22 PM »

the triboron website died ! even the homepage is now a "domain for sale ad"

29

General Two Stroke Talk / YZ 250 EFI

« on: May 13, 2013, 10:46:37 PM »

Would love to but at the moment the cost would be high. The Link computer cost $1500 NZD alone. Ultimately a computer board could be made to suit our application MUCH cheaper. At the moment we are just keen to prove this technology can work, In saying that if people are interested I will certainly consider making kits, but lets get some hours on this one first.

Wow I didnt realise the Link computer was that pricey.

If only you could get a little $250 netbook computer, install a program on it and then have the loom feed into the PC via a 9pin serial or USB
then zip tie the PC to the airbox hahaha

30

General Two Stroke Talk / TRIBORON!!!!!!

« on: May 13, 2013, 02:34:39 AM »

A stable solution of boric acid nano particles seems to be the thing about Triboron.
See patent, in English: http://www.faqs.org/patents/app/20120108475

Found a mix of rave reviews and healthy skepticism on a couple of Swedish forums.
Looks like possibly a good oil to me, but would not expect any miracles.

Looked up boric acid as its coefficient of friction is similar to that of ceramic additive.

So it should work well.

It might be ground breaking compared to your run of the mill 2T oils.
But when compared with other high-tech oils it will be on par (or slightly better or slightly worse)

nothing wrong with that though!
It should work VERY well in theory.