Let's see how much m20 heads suck.

[digger]

We are several tests in ;)

The variance between ports are negligible, extremely close to equal between castings and individual ports

do you mean it is close to equal with the manifold attached?

[digger]

my bad, i would not mismatch parts (unless i was to fit a ported 200 head to a b25 bottom end;)) but that is how i interpreted his post given there has been no 200 head flow numbers

[u3b3rg33k]

very much an anticlimax

i think it is worse that i thought it would be

you go from being able to make 260bhp to 190bhp;) by fitting the ETA fanimold

Mismatching notwithstanding, the comparison is moot. Why on earth would you do that to an engine that strives to be a turbo-free diesel?

[ForcedFirebird]

Also, Digger, those numbers are full "I", full sETA and full ETA. Didn't post our findings on mismatched parts.

[ForcedFirebird]

very much an anticlimax

i think it is worse that i thought it would be

you go from being able to make 260bhp to 190bhp;) by fitting the ETA fanimold

now it is time to tell us some runner lengths and the diameter at various cross sections for the full picture


with the 885 and b25 manifold it would be nice to flow each runner to see any distribution differences

We are several tests in ;)

The variance between ports are negligible, extremely close to equal between castings and individual ports

[digger]

very much an anticlimax

i think it is worse that i thought it would be

you go from being able to make 260bhp to 190bhp;) by fitting the ETA fanimold

now it is time to tell us some runner lengths and the diameter at various cross sections for the full picture


with the 885 and b25 manifold it would be nice to flow each runner to see any distribution differences

[TobyB]

Really doesn't make you want to put a high- lift cam in there, tho, does it???

This is fun- thanks, John!

Ever since reading the Vizard (?) book where chapter 3 is all
about buying 3 shop- vacs and making your own flow bench, I've wanted to do it too...

t

[camip]

From that chart the eta doeant look to good.

[ForcedFirebird]

This is with the manifold attached, injectors installed, all vacuum lines blocked and throttle locked open. The non-test ports were also taped shut to prevent cross flow.

http://wot-tech.com/pdf/BMW%20M20%20Comparisons.pdf

[ForcedFirebird]

[ForcedFirebird]

eta manifold is better than you think. Let's start there.

[Balleristic31]

Post results? :p

[future rs]

Well. The eta, seta and 885 manifolds have been flow tested. The results are very surprising.

And....?

[ForcedFirebird]

Well. The eta, seta and 885 manifolds have been flow tested. The results are very surprising.

[ForcedFirebird]

yeah i know it is but i I have never liked the fact that the opening to the head is not perpendicular to the centreline when flowing but it is when it is operating.

We started messing with clay, adding material in places, changing the shape etc. The clay can be shaped in a way to gain ~6CFM.

We are baking the carbon and blasting a manifold now to put on the head to keep the results stable. Hopefully we will have some results today.