Pics from york
Turbo Mini Forums

Uploaded a few pics from today (Monday) to turbominis.

The originals are big so if anyone wants a better quality pic let me know.

Cheers

Neil

Can you see anything other than mud?

Alex

AlexF

good pics!

I've added some more pics to the gallery, only temp though as the compression is a bit dodgy.

In the pic's that were posted of York, I noticed that ministorm 2 to (the orange cut down drag mini) was running the vmax supercharger set-up with a Webber and N20...on both engines!! Sweet Mary love and orphan, that thing must el'rapido!!!

Also, whats going on with Carl Austins rear engine's ram pipes?!

Choppo

Hannibal: There are two ways we can do this: the easy way and the hard way. In a few minutes my friends and I are going to come down on you like your worst nightmare. You're gonna wish the Earth had opened up and swallowed you whole.
bad guy: What's the easy way?
Hannibal: That WAS the easy way.

it ran in the 12's i think. remember seeing it run a 12,7. problem was hearing the times as there is no board that brings them up.

Both Ian and Carl were not running the NOS yesterday.

Carl strange plenum/rampipe set up is an idea from bikes evidently, the Nos is injected into the plemun(that looks like my curry making pan at home!!)along with the fuel.

Edited by giallofly on 29th Mar, 2005.

When I visited Carl a month ago, I asked him the same question. He gave me a thorough explanation. Yours Dave? :)

LOL!

Why is that Dave?

Not being funny just interested!

alex

AlexF

come on dude, think about it!

I'll make it easy for you...

As it's running on a weber, we can simplify things by calling it two seperate engines (feeding off two seperate carbs) joined together.

So,
Imagine the engine in half, so it's just cylinders 1&2.
You have one inlet tract feeding both cylinders. Without the gas, fuel isn't a problem - the engine will drag air through the carb (and hence fuel) whenever an inlet opens. Hence, the engine takes fuel in, when it WANTS fuel.

Now change to a continuous injection (nitrous). Inlet #2 opens for 180crank degrees (theoretical) then closes. Now cylinder two opens for 180 crank degrees then closes. This scenario is fine...

Unfortunately, cylinders 3 and 4 are now doing the same thing, hence inlet port 1&2 is still gettign continously injected (filled) with gas/fuel for the next 360 crank degrees.

So, next time it comes round to valve #2 opening, it it takes in what is effectivly 540 crank degrees worth of gas/fuel mix. The valve closes, and #1 opens - taking in just 180 crank degrees worth.

Hence, middle cylinders will always take in (approximately - ignoring overlap adjustment) 300% more fuel than the outer cylinders.

Best solution is to use a monojet, which feeds all cyliders at the same time. Very easy on a turbo or single throat carb application, not so easy on a split-carb like a weber - hence the need for a chamber to spray the gas/fuel into.

Dude? 10-4 good buddy... lol

Anyways, not being a nitrous person...

surely you meter it better with more solniods and a better controller?

Alex

AlexF

No, the main control (when the solenoids are at 100% duty - ie fully open) is governed by calibrated orifices (jets LOL!) in the gas and fuel solenoid outlets.

Contollers just pulse the nitrous jets - which does of course mean that theoretically at high rpm a fuel and nitrous mix might not make it out of the injector at just the right point when a valve is open, or even worse, just nitrous comes out, but the fuel is ms behind...

Best nitrous system is one injector per inlet on an engine with non-siamesed inlets...

A very similar problem as you find trying to inject the A-series... Trying to determine WHEN the engine wants to take fuel in and WHERE is the hurdle. As minispeed have proven, any ECU can look very pretty and manage to RUN an a-series - but making it so it does the job right, now THAT's a challenge! Amazed how peeps think it's more simple than it is!

Edited by turbodave16v on 29th Mar, 2005.

Yeah it is a bit of an obvious problem isnt it!

direct port (thorugh the head even!) nitrous injection and independant solenoids...

or even just a biscuit barrel!!!

Alex

AlexF