EFI?

[superman]

mr rene are you implying that honda riders are a bunch of slo mo's with no sence of adventure lol

nothin wrong with honda just because they are solid reliable machines.

in regards to the FI why not just upgrade the bike im sayin, you will have less trouble.... i thought the ZXR was good as it was too, prefect first big bike
wouldnt have changed mine for anthing lookin back now.

[rene]

bah if your still happy buying off the shelf tinker toys then fair enoth your not ready to understand what spending days apon days in a dusty shed trying to get stuipedly anoying things to work together.

[deviant]

i could live with the FI system but milling your own head ect is a little above my IQ level..even if it is 2t.

Just out of intrest how would you fit the exhurst hole below the intake? after all its solid engine case...or are you going to extend the barrels with the new head? and would you use powervalves or just have a shitty bottom end?

That sounds like a killer project any way

It was only really a thought experiment prompted by people older than me reminiscing/moaning about the demise of the 2T. Which veered into a technical discussion on whether you could solve some of the problems of the conventional 2T (crap emissions and tendency to seize - both caused by mixing the oil and fuel).

The principle I described is basically how two stroke industrial/marine diesels work. And there's no inherent reason why it couldn't work for a petrol engine. There are, obviously various obstacles in the way, but if I had nothing better to do...

The discussion is on the link below. I post under the same name on there.

http://pbmagforum.com/forum6/9011.html

[rene]

i love 2t engines as well, they ride so much nicer than 4t, just right good fun!

if 2t engines had the same amounts of money thrown at it as a 4ts they would be far more reliable, the only reason why there not really at the moment is because there only ever used in highly sprung engines. If a 4t 125 bike was puting down 30bhp id love to see it make it to 10k miles in a 17 year olds hands!

Like you said though because of the euro emssions tests i recon 2t is going to be completly gone soon shame really so many people have no idea how wonderfull they really can be!

Didnt they make a few years ago a 2t boat engine thats actually cleaner burning than a 4t of the same CC? made a fair bit more HP i think as well

[superman]

*sigh, sigh* nothing wrong with the buy now toys, my honda rocks, lurv it. and im not to great with the tools either plus i aint got the patience to try making something work when it already works good enough if you no what i mean,,,

i wouldnt mind makin a go kart with a couple of bike engines thoe i bet that would be ace. an rapid come to think of it. but then its back to the point, if i made it, then it would certainly be a death trap lol.

[rene]

everything i build is a death trap...why else would you bother? if its not going to be fun then i dont want it

Mate used to do most of the work but neaither of us have any space anymore. I need to learn how to weld/mill my own parts before i start another project though! Prob will be some kind of KX/CR 500 power go kart as well

[carsounds_dan]

well I've been looking and can get hold of CBR600 thottle bodies and injectors for £50 roughly, and the ovula zx6r ones for a little more.. I can then use the TPS that is fitted to the rails, use the coolant temp sensor on the bike, fit a lambda sensor to the exhaust system, adjust the injection system to use the standand pickup output, fit an airbox temp meter and away you go. The hard bit will be fitting the throttle bodies onto the block but then the next hardest will be the mapping but from what I've read mega-squirt is actually really good for mapping.
Cheers
dan

[superman]

hmm i think a kart would be the bees knees i recon a couple of 2 stroke engines would do nice, but again i wouldnt have much of a clue..

lol im up for the fun side but not a death trap lol, why weld the frame when you can use duct tape what better rush than wondering about what corner the kart will fall appart on

[Northern ANdy]

RE: deviants post
the blower would blow right through the exhaust port

[deviant]

RE: deviants post
the blower would blow right through the exhaust port

and that's a problem because?

or more to the point, how is that any different to a conventional 2T using crankcase compression to push the mixture in/exhaust gases out of the cylinder? I'm not really talking about a massive pressure like a turbo/supercharger, just something to replicate the effect of the crankcase.

That's actually one of the reasons that 2T's are crap for emissions - they lob a whole load of unburnt fuel straight through the engine and out the other side. That is part of the reason I think direct injection is the way to go, as you could properly scavenge the cylinder with clean air using the blower, then squirt the right amount of fuel in when the ports have closed.

As I said, this is basically how modern 2T diesels work, although I believe they use poppet valves for the exhaust, if not the inlet too.

[Northern ANdy]

sorry thought you meant a substantial pressure

[Scott221]

Danny boy...


Get lots of pics, this could be a weekend in the shed for me in the future!!! Go for it!

[rene]

sorry thought you meant a substantial pressure

would still work even with lots of presure in theory, youd just have REALLY bad mpg though...

Didnt the Bimota 500 V Due have FI system? then they ditched it and went back to carbs. Think aprilia are doing some kind of FI on there 50cc's as well

[carsounds_dan]

well I've spoken to the guys at mega-squirt and they recon that the ECU will deal with the standard pickup sensor the ignitor box uses.. but I'm wondering if it'll bugger the ignitor box running the ECU off it as-well.. Unsure..
But to let the mega-squirt handle just the fuelling side of things the I'll need a wideband lambda sensor and controller, an Air temp sensor for the airbox, a TPS (on the throttle bodies) and a coolant temp sensor (one already on the bike). So as far as I'm concerned I just need to worry about mounting the throttle bodies, Adding Lambda sensor, making an airbox (might use an old ram air box I've got if it'll work out well enough) mounting the air temp sensor and then wiring it all up. I'm gunna let the standard ignitor box deal with everything ignition wise for a bit and then eventually the MegaSquirt will be used to control that aswell... but what gains I'll get I dont know.. I'll be able to advance ignition etc without actually changing any thing on the bike which will be a boon if I want to fiddle about on track days.
cheers
dan

[Gemini]

cant u just fit a FI zx6r engine in it?

gem