Das Beast: My E30 track / street build

[dvallis]

Finally got a transient analysis of the eBay intake manifold working. Video is here. Enjoy.

Cylinder 1 5 3 6 2 4 intake stroke shown below. It works, as in all runners suck air, but I'm not crazy about the flow. Going stock.

[dvallis]

Obligatory meme

[Digitalwave]

I love science.

[dvallis]

#Facepalm! Of frigging course. You need to open the runners in order of firing sequence. That makes total sense. Thanks Digger.

Like you said, flow looks a bit uneven in some runners. I think we'll still stick with OEM as it's a known quantity.

[digger]

here are all runners drawing



firing orders



runners 3 and 6 drawing



runners 1 and 4



the difference in mass flow between them is very small. it would run ok atleast a from a distribution perspective

obviously a transient analysis simulating the pulses is better way to do but this is a cheap and nasty way to get an idea