russellw

Comments invited below.
Cheers
Russ

RAPTOR

Or more simply;

Volumetric Effeciency = (The volume of air that passes through an engine) / (The volume displaced by the movement of the pistons while on intake & exhaust strokes)

Russ, what has that got to do with a fuels octane rating or BTU.

Not having a go at you, I like the idea of these Tech Briefs!

__________________

russellw

The original post has been edited for the sake of clarity.
Russ

cs123

Russell,
You touched on the relationship between intake and exhaust design and VE but then used that god-awful formula. That forumla ignores the existance of camshafts and manifolds who's sole purpose is to increase VE.

Some NA engines will achive a VE > 100% in high states of tune.

It's nice that you are doing these articles, but I've hated that forumula since Mech Eng II at uni. Sorry for the rant.

Chris.

russellw

Thanks again CS123 for the comments. Whilst I take your point about the formula the reality is that it IS still taught and it IS still relevant for the majority of every day road going vehicles. It's worth pointing out (again) that these articles are aimed at providing a general view rather than a detailed analysis because that would fill a book - it's why they are called tech briefs.

While on the subject: please feel free to contribute more detailed articles to the tech forum - contributions are welcome from any member who feels they have something to contribute and we'd certainly be happy to have skilled input to replace my laymans knowledge.

Cheers
Russ

TA22-3SGTE

I came across a site a while back ( American ) where a performance workshop was doing a lot of research and tests on manifold design and flow and was stated that the austrailian ford 6 cyl EL-EF flowed 100% VE at 3000 rpm .
Maybe thats why Ford has kept the same design on the BA .

Trevor

cs123

Alright, I'll bite. How do I submit one.

russellw

E-mail the article to help@fordforums.com and we will submit it with due credit to the author.

Cheers
Russ