Plenums

[ETM]

That is truely a special design he has come up with, far beyond anything available for our engines that I am aware of. He still hasnt tested it on a running engine yet though.

[Guest EGOXRT]

I think the principle will be the same for all plenum's as far as design goes.

I doubt any of the plenum's mentioned here have been designed in such a manner, I would

love to be proven wrong.

I am not bagging anyones product, just showing what tools are available for design and testing.

The cost of having such tests would be costly but very interesting and without needing a donor car etc, etc.

[ETM]

You are still missing the point that all that testing is only an educated guess, they state that numerous times in that thread. It is by no means considered real world testing and only once run on an engine will the exact results be known.

[Guest EGOXRT]

Not really, I know people that use similar software for fluid dynamics and by no means is it guess work.

You can get very accurate results as far as what people are wanting to know here.

It is not just about peak power gained, cylinder filling and efficiency are also at stake.

I think some people are hinting at the prospect of particular plenums doing a better job at things like that than the others.

The debate still rages at which one fills all the cylinders most effectively, thus lessening the chance of some cylinders running

leaner or richer etc, etc. The "real life" testing would have some massive variables to overcome, this you should be quite aware off.

Edited 01/07/09 06:20 AM by EGOXRT

[ETM]

I agree to disagree lol.

[Guest EGOXRT]

Likewise.

[ETM]

Look closely at this photo, the way you test cylinder filling is clearly visable. Your computer programs are great but they do not and never will replace real world data.

[GR8XR6]

Read this it has a lot of interesting things

that effect plenum design.

Wicked link! GREAT INFO on plenums. Hoping there has been testing done here in OZ of some sorts???? Anyone know? Surely there has been some sort of engineering tests into the designs of products out there??

[Guest EGOXRT]

Lee, I understand that but who will donate a car to drill and tap manifolds. Who will supply probes and data logging equipment, no hope.

This debate will be endless as far as pro's and cons.

Real word testing will create a few variables that all the manufactures will debate. Piping will be one issue to start off with?

Again, software will take care of what is being asked here, but It will never come to fruition anyway so no use arguing.

[01txr]

Now that's a good design, not ideal but would be a lot more even then

what is on the market for our cars.

The only thing I can think of to better it would be to centre the intake and

from there spread the opening into a slot to join to the plenum chamber employing

the same principle.

Then to make it suitable for different applications, design the plenum so you can

and or remove spacers that alter plenum chamber volume.

Only problem is room to make it like this.

Another help would be to add baffles to aid swirl into each runner to help with fill.

To manufacture one like this would take time and money.

For the money I still feel the Plazmaman then the Nizpro are the better designed plenums for

our cars.

The CAD programs are pretty dam good at getting things as close as possible to real world

senario's, but you will never beat real world testing also they are only as accurate as the

information being entered.

I have had a quick look at 888's chassis software, I was shown how each point in the rollcage

showed stress levels and how you could similated what happens to it in a crash senario.

Pretty orsm stuff.

It would be interesting to draw up the 3 manifolds in question in this thread and see what the

flow dynamics testing revealed.

Has anyone the plenum volumes of the 3 plenums as the larger the more suited for higher

boost applications with sacrifice of low down efficency.