Plenum

[F6 UTE]

Ok, let me re-phrase:

Your engine has a bore x stroke x no cylinders to give a certain displacement. In our case, close to 4liters.

So, how much liquid can your plenum keep?

Anyway, depending application, plenum size do vary, you are correct, one of the great engine builders of all time, Smokey Yunick from the USA reckons for turbo applications the plenum volume should be close to total displacement of engine.

This yields very good throttle response, and good reservoir capacity on sudden full-throttle acceleration, giving turbo decent time to spool up before a significant drop in charge pressure occurs.

Anyway the close to ideal solution for road-race applications, final application will determine plenum chamber volume in turbo applications. Racing on twisty roadways with lots of on/off type driving will benefit more from a smaller relative plenum, and for constant high-speed (read rpm) a larger plenum will do a lot to dampen oscillations in intake pressure, and thus powerlevels.

So yes, just my titbit, just wondered out of sake of curiosity what your volume was, since it made a significant difference in power levels, probably due to lower restriction, thus higher charge pressure realized at the ports, and you mentioned better throttle response, ascribed to the smaller plenum volume, ridding your intake system of the long lengths of piping.

Most likely you will feel an immediate response of the line, big improvement, and then a quicker build of your torque-curve due to smaller volume to pressurize.

So, average power/torque should have increased?

Thanx for the feedback anyway, it is appreciated.

Best regards,

MrBean.

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I understand where you are coming from, but I actually was saying that my plenum volume does not equal the engine displacement..

[MrBean]

Hehe - you got me there

Let that be a lesson to me....

[F6_Tornado]

Underside I did differently, so it's like the winged keel I suppose.. So no pikkies 

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I've seen it

[F6 UTE]

HAHA.. I've witnessed your handy skills, and I ain't bothered at all!!!!

Oh, the plenum ain't the only thing you'll be seeing, add the back of my ute to your list!!!!!!!!!!!!! Including the eye chart!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[tab]

Such love!

That'll be good to see actually, it's usually the candy apple following the camel isn't it? :flameman:

[Blonk]

Or the Blund leaping the blonde

[F6 UTE]

Such love!

That'll be good to see actually, it's usually the candy apple following the camel isn't it? :flameman:

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Tabby, again you prove you're nothing but a \|/..

Last time I checked, I was quicker, and I had the better ( well, any... ) hand/eye co-ordination..

The old boy will have to wait till either:

a.) Hell freezes over

b.) I drive his ute

Till the Camel is quicker than teh barge............................

The fact teh barge would never have been as quick unless he stuck his old paws into it, remains inert

[tab]

Oh righto - must have missed the new video and time slips :flameman:

[F6 UTE]

your missing more than that tabby girl.. :flameman:

He's slower than me for the past few months.. Him and his "Western Taipan Snake Pit.. " He invented..

He can't even steer an auto 6spd quicker 'un me..

[macka'sxr6t]

F6, I was just doing some searching about plemum and happened across your thread.

It's been nearly 12 months since the creation. You were gunna post some dynos comparisions, do you still have them I would like very much to see them.

Did you get around to building your second creation?

What happened was it better?

cheer

macka