324td manifold ?

[iKst]

Hi,

I just got a manifold from 324td, and today i went and tried to put it on my spare 320i head (i will use M20B25 for project, but i have this 2.0 head for testing. They do have the same exhaust ports and bolt pattern right ?).

I tought the manifold would bolt on directly, but there is quite a large gap in the bottom line of bolts (see pics). I would like to see whats the most common way to fit this manifold. I was thinking of making and adapter plates of some kind, but i would like to know if there is an easier way to do it.




Larger pics here: http://www.moj-album.com/uredi/ikst/5145820/

[Jon_Bmw]

Yep, make notches in the bottom part of the manifold for the bottom bolts, and enlarge the top bolt holes. It will then bolt on

[oldroydsr4]

Hi, where did you get the 324td manifold from? any chance gettin another 1.

cheers dave

[iKst]

There is quite alot of them over here. I can get another but im not from UK. I guess shipping will be expensive. PM me if you are interested.

[BubbaRay]

But the flow wont be very good as the holes wont line up exactly

[blingsta]

these are the same as the 525td manifolds arent they

[iKst]

They should be, engine code is the same and they look the same on pics.

[stE30w]

the 324 td mani`s the same as the 524td with a t3 flange

the 325td and the 525 td are different cant quite remember what flange it is

i know its a 3 bolt

[e30_Turbo]

It needs to look like this:


HTH, Mark

[dan_emaps]

i didn't realise it was as easy at this to use the 525td manifold, how comes its not more popular? as it much be alot easier/cheaper to use this than make or have a custom manifold made? are there any drawbacks?

Is this what you use fozzy or did you have a 1 off manifold made up?

[tonyppe]

Yep, make notches in the bottom part of the manifold for the bottom bolts, and enlarge the top bolt holes. It will then bolt on

if you do this and all goes well, get your finished bored head and the new manifold. make the ports all dirty with grease, bolt them together over night then take them to the person who done your head to get match ported. otherwise the flow will be like hitting a brick wall!! and you wont get full potential.
when this is done, then get the manifold gasket, make the ports dirty again (so it leaves a mark!) bolt them all together with the gasket, then next day you will need to bore out the ports of the gasket to match both the head and manifold
i hated doing this it has to be done to the inlet side too, especially if you have bored the head. some gaskets arnt even made properly, and will cover ports up slightly on completely standard cars!!!

[dan_emaps]

would it not be easier to use a 525td manifold gasket, cut into it like you would the manifold and bore out the top holes, then put the lot together and then get it flow tested?

[e30_Turbo]

Is this what you use fozzy or did you have a 1 off manifold made up?

Mine is a custom 7 branch, started life as a 6 branch manifold but there isn't much if anything of the original left. It's been cut in half, turned up side down and cut up again! It's s-steel so no issues that way but the damn thing used to crack all the time but since a complete once over and re-weld it's been fine.

There are some pics of it somewhere on here....will see what I can find.

HTH, Mark.

[tonyppe]

Is this what you use fozzy or did you have a 1 off manifold made up?

Mine is a custom 7 branch, started life as a 6 branch manifold but there isn't much if anything of the original left. It's been cut in half, turned up side down and cut up again! It's s-steel so no issues that way but the damn thing used to crack all the time but since a complete once over and re-weld it's been fine.

There are some pics of it somewhere on here....will see what I can find.

HTH, Mark.

thats the thing with stainless, fatigue cracking... is why some places charge so much. matt simpson do nice manifolds as they gas purge the welds. us at longlife didnt...

[Jon_Bmw]

Yep, make notches in the bottom part of the manifold for the bottom bolts, and enlarge the top bolt holes. It will then bolt on

if you do this and all goes well, get your finished bored head and the new manifold. make the ports all dirty with grease, bolt them together over night then take them to the person who done your head to get match ported. otherwise the flow will be like hitting a brick wall!! and you wont get full potential.
when this is done, then get the manifold gasket, make the ports dirty again (so it leaves a mark!) bolt them all together with the gasket, then next day you will need to bore out the ports of the gasket to match both the head and manifold
i hated doing this it has to be done to the inlet side too, especially if you have bored the head. some gaskets arnt even made properly, and will cover ports up slightly on completely standard cars!!!

Hmm, i'm not sure if there is differences between the port size and arrangements between the 2.5 and 2.4td manifolds...but...

The exhaust ports on the 2.5td manifold are exactly the same size if not a touch bigger than the m20 exhaust ports. The are spaced the same as the m20, so if you were just to place it next to the head and hold it the ports line up FINE.

The only thing that is different is the bolt position holding it onto the head, so by adjusting both holes to make them the same position as the m20 head ports you'll have a manifold that doesn't need the exhaust ports changing, just the bolt holes.

[tonyppe]

Yep, make notches in the bottom part of the manifold for the bottom bolts, and enlarge the top bolt holes. It will then bolt on

if you do this and all goes well, get your finished bored head and the new manifold. make the ports all dirty with grease, bolt them together over night then take them to the person who done your head to get match ported. otherwise the flow will be like hitting a brick wall!! and you wont get full potential.
when this is done, then get the manifold gasket, make the ports dirty again (so it leaves a mark!) bolt them all together with the gasket, then next day you will need to bore out the ports of the gasket to match both the head and manifold
i hated doing this it has to be done to the inlet side too, especially if you have bored the head. some gaskets arnt even made properly, and will cover ports up slightly on completely standard cars!!!

Hmm, i'm not sure if there is differences between the port size and arrangements between the 2.5 and 2.4td manifolds...but...

The exhaust ports on the 2.5td manifold are exactly the same size if not a touch bigger than the m20 exhaust ports. The are spaced the same as the m20, so if you were just to place it next to the head and hold it the ports line up FINE.

The only thing that is different is the bolt position holding it onto the head, so by adjusting both holes to make them the same position as the m20 head ports you'll have a manifold that doesn't need the exhaust ports changing, just the bolt holes.

its obviously better if the manifold ports are bigger than the exhaust ports on the head, as it wont have a brick wall effect this way BUT if this is the case, then you will get a vacuum effect in the manifold where the size is different and you wont get the best performance.
i can draw you a diagram, its a little hard to explain. its all physics though :p
also, the gasses want to equally fill the given volume, if they go from smaller head port to bigger exhaust port the gas will slow down filling the volume, loosing a bit of pressure. this is not what you want right before the turbo! have i explained that ok? :p

[Jon_Bmw]

No need for a diagram, when i said a touch bigger, i'm talking about half a MM or less. Nothing to worry about in comparision to shitly made manifold gaskets :S

[tonyppe]

No need for a diagram, when i said a touch bigger, i'm talking about half a MM or less. Nothing to worry about in comparision to shitly made manifold gaskets :S

hahahaha!!
yer but no but yer but no....

i badly want to build another engine, but no garage or shed i used to drive a shed now its about this big -> |_| <-..

who wants help building an engine ? i got a stand and everything....

[dan_emaps]

does anyone know for sure if the port spacing and port sizes are the same on these two manifolds? (2.5td and 2.4td)