Random thoughts thread

[IntotheOcean]

haha I wanted to add a tag but I'm not witty enough :/

[Shagaliscious]

Originally Posted by IntotheOcean

haha I wanted to add a tag but I'm not witty enough :/

You don't need to be witty, someone simply put "lol tags".

And there are even more on there now

[Calum]

I went to see the new Star Trek tonight. I'm not going to spoil it, but I will say that it's very much a J.J. Abrams movie.

[NickD]

If you havin' game problems I feel bad for you son,
I got 99 problems and an Xbox one

[Jayde]

First time logging in all day and I get the usual There are no subscribed threads to display in this folder for this time period. I click the View all Subscribed Threads link and the most recent one is less than 10mins ago. /sigh

[serialk11r]

@Dimman wow I'm feeling super clever right now, I figured out the problem of recovering losses from a centrifugal supercharger!

If you are able to feed a small amount air only to the very edges of the inducer, the air will arrive at a high velocity and transfer some of its energy to the compressor. So I'm thinking, divide the inlet up into 3 compartments: the first one supplies air via idle control valve and has a driver controlled throttle to give say 3000rpm free rev, the second and third compartments are linked to the driver controlled throttle, the second compartment opens the engine up to full NA power, the third gives full boost power. Throttles linked so that pressing the gas pedal opens the first one fully, then the second one, then the third.

There will be gaps and leaks in the impeller but they should trap vortices between the fins and thus not have huge losses.

A more elegant solution would be a "curtain" that goes over the inlet and barely has any clearance, but getting the carbon nanotubes that would take the 50 pounds of force without being too thick and blocking airflow when fully open is a challenge.

[Dimman]

Originally Posted by M-17

That kid is a buffoon.

I'm enjoying all the tags the members are posting though.

I had the 'nope' reaction, then read what you said about the tags, scrolled down, then almost choked on a mini-donut laughing.

Awesome.

[Dimman]

Originally Posted by serialk11r

@Dimman wow I'm feeling super clever right now, I figured out the problem of recovering losses from a centrifugal supercharger!

If you are able to feed a small amount air only to the very edges of the inducer, the air will arrive at a high velocity and transfer some of its energy to the compressor. So I'm thinking, divide the inlet up into 3 compartments: the first one supplies air via idle control valve and has a driver controlled throttle to give say 3000rpm free rev, the second and third compartments are linked to the driver controlled throttle, the second compartment opens the engine up to full NA power, the third gives full boost power. Throttles linked so that pressing the gas pedal opens the first one fully, then the second one, then the third.

There will be gaps and leaks in the impeller but they should trap vortices between the fins and thus not have huge losses.

A more elegant solution would be a "curtain" that goes over the inlet and barely has any clearance, but getting the carbon nanotubes that would take the 50 pounds of force without being too thick and blocking airflow when fully open is a challenge.

I'm not quite following. (I've put my car brain part on the back burner to give more heat to my watch brain part...)

So are you talking about 3 plenums with 3 throttles, one of which bypasses the compressor so the car can act as 'pure NA' off boost, and has two throttles that feed the compressor inlet, with different sizing and placement so at low compressor speeds (building boost)it can spit high velocity air at the tips of the wheels to use the energy more efficiently, then open 'normally' to provide adequate airflow once it's at full boost? Something like that?

There is a balance between function and complexity that needs to be struck, though...

[OrbitalEllipses]

Originally Posted by Dimman

There is a balance between function and complexity that needs to be struck, though...

The Germans would disagree with you.

[ichitaka05]

I need some hot chick to massage my back... @Giccin, @ette, @IntotheOcean. Or is that wishful thinking?

[kanundrum]

$5 dollah. you take spring roll!

[Dimman]

Originally Posted by OrbitalEllipses

The Germans would disagree with you.

Well they're special, aren't they? My buddy had a VW Fox, with mechanical fuel injection. The concept is both fantastically amazing and terrifying at the same time.

[serialk11r]

Originally Posted by Dimman

I'm not quite following. (I've put my car brain part on the back burner to give more heat to my watch brain part...)

So are you talking about 3 plenums with 3 throttles, one of which bypasses the compressor so the car can act as 'pure NA' off boost, and has two throttles that feed the compressor inlet, with different sizing and placement so at low compressor speeds (building boost)it can spit high velocity air at the tips of the wheels to use the energy more efficiently, then open 'normally' to provide adequate airflow once it's at full boost? Something like that?

There is a balance between function and complexity that needs to be struck, though...

No bypass. It's basically like "variable geometry inlet" but on the compressor. Smaller inlet = lower pressure, but if you do it right then you can decrease losses. I was thinking using something like the IRIS engine (look it up) to regulate the compressor inlet but that's way too hard to build.

This is having dividers on the compressor inlet, one feeding only a small portion of the edge of the compressor while the other mini chambers are under vacuum. You spit high velocity air at the tips of the compressor wheel when under low load so that the compressor wheel recover some of the energy otherwise lost to the throttle. Ideally you have some "cone" like on the SR71's engine that spins with the compressor and can block off the fins but that's way too hard to build.

Complicated, but I think it's not as bad as some of the German shit. It removes the bypass valve and or clutch and adds 2 throttles...The S85 has a dedicated oil pump for the VANOS system, a constant displacement oil pump and then a second variable displacement oil pump (why not just one variable displacement pump...) acting as your usual oil pump, and then 2 more electric oil pumps in the head to suck out excess oil during cornering. (reading this out of the E60 M5 vehicle overview)

[IntotheOcean]

@ichitaka05 get a fat cat and have it walk around on your back