What Do The Litres Mean.

[Guest BrainFluid]

I always wondered what the, say 1.1 litre, meant.

 

To hazard a quess after seeing inside a de-headed engine does the litre value stand for the ammount of space inside all the cylinders together at any given time?

 

Nate.

[Rob_the_Sparky 9]

I believe it is the swept volume per piston multiplied by the number of pistons. Not sure whether it includes the head volume or not though.

[sonofsam 5]

My mate gave me the equaton for this,cant remember of the top of my head/

 

is it more commonly referred to as CC (Cubic Centimeter)

 

as in a 1.9 Litre is 1900cc.

Edited March 28, 2006 by sonofsam

[d-9 0]

My mate gave me the equaton for this,cant remember of the top of my head/

 

is it more commonly referred to as CC (Cubic Centimeter)

 

as in a 1.9 Litre is 1900cc.

 

yes, but what is it measuring?

[M3Evo 0]

It's the total swept volume of the engine, so a 80mmbore and 80mm stroke 4 cyl engine would displace the following:

 

pi x 4^2=50.26cm^2 (area of the bore)

 

50.26*8=402cc/cyl

 

402*4=1608 cc engine.

 

Chamber volume has no effect on capacity.

[Foltan 0]

In simple terms i think its the total volume of the space used for combustion in the cyclinders

[sonofsam 5]

yes, but what is it measuring?

 

Dont ask me , im just a sh$t metal worker !!

 

 

 

 

Litres sounds like a measurement in fluid/Liquid and cc in area or air,same thing then,no,yes...

[Ahl 4]

They're both a measurement of volume. And M3Evo explains it well above.

[Hilgie 16 2 Cars]

yes... and 1000cc is 1 litre

[Guest BrainFluid]

yes... and 1000cc is 1 litre

 

 

Lols . I know that much

 

I think that I would need a further break down of M3EVO's equatic explaination to fully understand it...

 

Although...If 'swept volume' means: How much volume the bores have sweep past them through 2 strokes, exhaust and combustion, Then I think i get it.

 

Nate.

[Ahl 4]

Its one stroke not two. Like he says the bore x the stroke.

[hengti 2]

only really repeating M3EVO's work here, but :

 

bore (ie. diameter of cylinder) in 1.9 engine = 83mm, or 8.3cm. Radius (half of diameter!) = 4.15cm.

stroke (ie. distance piston travels up and down in the cylinder) = 88mm, or 8.8cm.

 

Volume of one cylinder is the area of the base of the cylinder times'd by its height, expressed by the equation Pi (3.142) x radius(squared) x height

 

this'd be easier to understand with symbols ...

 

so, volume of one cylinder is 3.142 x 4.15(squared) x 8.8 = 476.20 cubic cm

 

476.20 x 4 cylinders = 1904.8 cubic centimetres

[Guest BrainFluid]

Briliant. All understood!

 

Thank man

 

Nate.

[KRISKARRERA 2 1 Cars]

http://www.pumaracing.co.uk/capacity.htm

[jack biscuit 0]

Chamber volume has no effect on capacity.

Not what i was led to believe..? don't get me wrong not interested in chewing anyone's fingers off, but how can that volume be disregarded as it is included (by nature of opening the valve, so to speak) in the space that is filled with gas, prior to compression? there will not be a perfect vacuum in that space as the rest of the cylinder is filled!

 

I'd just like a further explanation to correct my possible misunderstanding..

 

[M3Evo 0]

I can see your point, and I have to admit I have no idea why the chamber volume is disregarded.

 

Might be as simple as someone decided that's how engine capacity is to be calculated.

 

Think about it this way though: If you took a 1.9 litre engine and then lowered the compression ratio by dishing the pistons, increasing the chamber volume and fitting a thicker head gasket, you'd still have a 1.9 litre engine.

[jack biscuit 0]

Aye it's still called a 1.9....

 

How many of us say we own a 1940 or a 1580 and such?

 

We leave that to the A series lads, who fight for every cc!

 

BTW i'd love to see a pic or two of yer GT6, sack that 2ltr 6 pot!

 

Had a mooch on your site dude, i'm well impressed.. but i haven't gone in depth yet.

 

Was hoping to see the lump in situ! Pull those little don dons oot!!

Edited March 29, 2006 by jack biscuit