4t tuning thread

[CookMySock]

unless you run piss all boost theres a whole ton. of issues that arise with carbs.

Not at all, carbs are perfectly simple to blow through. Lots and lots of turbocharged bikes blow through their standard carbs, with a few mods to equalise the diaphragm for boost, and the pitot tube trick for enrichening on boost. Google "turbo pitot tube", without the quotes.

Steve

[bucketracer]

That's the way I was thinking, Woodyracer has a FI CBR........ I wonder if it possible to fit such a system (clearly from a wrecked CBR) onto an XL100 (or some such)

Or you could keep it simple and use one of IgniTech's programable CDI Fuel Injection ignition systems:-

http://www.ignitech.cz/english/aindex.htm

Team ESE have brought some 2-stroke units from them for about $400 NZ each .............

[Schrgd]

Been done in NZ a few years ago, on a different bike i must say but those dirty little pit bikes were good for experimenting on if nothing else. Both Turboed and supercharged have been done, the turbo bike running primary legnum turbo from memory, and taking about a month to set up.
The supercharged one took a while longer.

Now the bike was a 110cc i think and was different to ride with a little boost but not noticly more powerful.
Will try to find the links if I can and post.

[Yow Ling]

What car has a supercharger powered by a secondary power source?

Maybe I reword your question"What engine has a supercharger powered by a secondary power source?"

Google the term "Hyperbar Supercharger" mostly used with diesel engines, it provides constant boost regardless of engine speed or load conditions. It does this by providing the turbocharger with its own combustion chamber and fuel supply, operating on the gas turbine principle , bleed air is taken from the compressor and supplied to the engine intake.

Using a weedeater motor would just make the bike a 2 cylinder of 99cc plus the weedeater displacement so would break the current rules. However under current rules a hyperbar would be legal as being a turbine it has no displacment

[bucketracer]

Ok, just toying with the idea, a supercharged Honda 100 ( std bore is 99cc) for F4.

Now the rules don't say the supercharger has to be driven by the same motor that powers the bike.

So the supercharger could be spun using an electric motor and battery or a weed eater motor or even two squirrels in a cage.

Using a weedeater motor would just make the bike a 2 cylinder of 99cc plus the weedeater displacement so would break the current rules.

Thanks for your thoughts Yow Ling, I like your turbine compressor idea and can see how I could use that.

A lot of people got lost on the technicalities but it was the legalities that I was interested in.

It’s pretty obvious there is no real technical reason it wouldn’t work it’s just that not too many people have had to find new ways of doing things within the F4 rules.

I was really interested in canvassing opinion on the idea that it’s only the motor that drives the bike that has to conform to the capacity rules.

And that the ancillaries could be powered any which way.

I would like to know what others think about the legalities of having a remote powered supercharger.

[bucketracer]

Don't go pissing your panties.

I thought most of the technical input today was interesting and honest but then there was the contributions from our regular Big-Noter that were desperate and often down right wrong and looked more about point scoring than genuine contribution.

SS90 it might come as a surprise to you, but you are the only one here that likes to wear his mothers panties.

[jasonu]

If you had, lets say, an ordinary 100cc legal bike and decided to strap on a running lawnmower engine to the frame for 'centrafugal ballast', would it now be capacity wise illegal eventhough the lawnmower engine wasn't connected to the driven wheel?
Wouldn't your idea of a 'self contained self driven' blower unit be more or less the same thing?

Also, I have heard (totally dumb) ideas of folks showing up with 250 twins and disconnecting one spark plug and saying it is now legal as only 125cc is pushing the wheel around. If that were to be deamed legal, eventhough it is pointless, then so should yours.

If you got one going and it was slow you will find no one will care. But if you start winning...

[Buckets4Me]

If you had, lets say, an ordinary 100cc legal bike and decided to strap on a running lawnmower engine to the frame for 'centrafugal ballast', would it now be capacity wise illegal eventhough the lawnmower engine wasn't connected to the driven wheel?
Wouldn't your idea of a 'self contained self driven' blower unit be more or less the same thing?

Also, I have heard (totally dumb) ideas of folks showing up with 250 twins and disconnecting one spark plug and saying it is now legal as only 125cc is pushing the wheel around. If that were to be deamed legal, eventhough it is pointless, then so should yours.

If you got one going and it was slow you will find no one will care. But if you start winning...

there was talk of using the other cilinder (without the spark plug) as the compressor ??

[SS90]

there was talk of using the other cilinder (without the spark plug) as the compressor ??

Still no pictures of your plan.

What is the problem.....Google not working?

[Henk]

there was talk of using the other cilinder (without the spark plug) as the compressor ??

I can only see that working if you overbored the compressor cylinder to give more than the nominal capacity e.g. 100cc live piston, 150 pump piston, has this been tried on anything? (too lazy to google)

[Yow Ling]

I can only see that working if you overbored the compressor cylinder to give more than the nominal capacity e.g. 100cc live piston, 150 pump piston, has this been tried on anything? (too lazy to google)

Dont forget that the compresor piston pumps on each stroke and the inlet only opens every second stroke on the live cylinder

[Buckets4Me]

Still no pictures of your plan.

What is the problem.....Google not working?

pitty it wasn't my plan LOL

have you got anything helpfull to say or are you off the meds and on the attack AGAIN ?

please dont come back over to New Zealand PLEASE

[Henk]

Dont forget that the compresor piston pumps on each stroke and the inlet only opens every second stroke on the live cylinder

Good point

[bucketracer]

Still no pictures of your plan. What is the problem.....Google not working?

I have never seen someone so needy for negative attention before.............or so desperate to be a big boy.

[Yow Ling]

I have never seen someone so needy for negative attention before.............or so desperate to be a big boy.

Read some of these http://www.kiwibiker.co.nz/forums/sh...t=german+jokes might give u some insight to the german mind