M30b34 E30 twin-screw supercharged muscle car

[LJ851]

Oh, I misunderstood. I am doing this same swap currently, and just replaced the intake manifold gaskets on my b34, and it looks the same as far as I recall. What specifically looks off to you?

Disregard my posts, i've been wrapped up in M90s too long, apparently. The pictures here show standard B34 heads and manifolds.

[Andy.B]

Not speaking about the block, it would be obvious with the head off since the bore of an M90 is completely different.

The only M30 head i have seen that doesn't look like the B35 or typical B34/M90 head is an uncommon M90 head that has a port shape almost like a cross between the B34 an B35, very similar to the one in ether's pic.

Oh, I misunderstood. I am doing this same swap currently, and just replaced the intake manifold gaskets on my b34, and it looks the same as far as I recall. What specifically looks off to you?

[LJ851]

AFAIK, M90's have a raised coolant passage on the driver side of the block from the water pump boss, across the top of the oil filter mount area, back to cylinder 5. On regular M30's, this boss ends right above the oil filter (which can be made out in some of the pictures in this thread). Also, the pistons from the pictures are dished, ensuring they are the NA 'green' catalyzed m30b34, with low compression and a conservative cam (at least compared to the 'dirty' euro m30b34 and m30b35s).

Not speaking about the block, it would be obvious with the head off since the bore of an M90 is completely different.

The only M30 head i have seen that doesn't look like the B35 or typical B34/M90 head is an uncommon M90 head that has a port shape almost like a cross between the B34 an B35, very similar to the one in ether's pic.

[Ether-D]

Alright, I found a "m30" cast under the cam at the front of the head. Production date "85" and "6".

I got the transmission mount fabbed up and locked down. I just added some material to the m20 g260 trans brace. Then I started on the driver side mount arm. This is just some 1/4" plywood for my template. Does anything bad jump out at yous about the design? There will be a chunk of 1/4" plate as a perch at the bottom.

[Andy.B]

Hmmmmmm...Casting date on the head and does it have "M90" cast into it anywhere ?

AFAIK, M90's have a raised coolant passage on the driver side of the block from the water pump boss, across the top of the oil filter mount area, back to cylinder 5. On regular M30's, this boss ends right above the oil filter (which can be made out in some of the pictures in this thread). Also, the pistons from the pictures are dished, ensuring they are the NA 'green' catalyzed m30b34, with low compression and a conservative cam (at least compared to the 'dirty' euro m30b34 and m30b35s).

[LJ851]

Here ya go.

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Hmmmmmm...Casting date on the head and does it have "M90" cast into it anywhere ?

[chondamx]

You should have someone airbrush to banana tubes to look like actual bananas.

Because: awesome.

[Ether-D]

Here ya go.

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[LJ851]

The manifold on the left is the one that came on my free m30b34. It says 3.2/3.5 on it. I thought that was the tell. If it said 3.5 it was a b35, if it said 3.2/3.5 it's a b34. But it certainly could've been modified at some point I reckon.

All B34 intakes/heads basically look like the older manifold in your pictures. B34 manifolds also have 2 steel braces from the top of the manifold to the valve cover where as the B35 does not.

Post a pic of the intake ports on the head.

[Ether-D]

The manifold on the left is the one that came on my free m30b34. It says 3.2/3.5 on it. I thought that was the tell. If it said 3.5 it was a b35, if it said 3.2/3.5 it's a b34. But it certainly could've been modified at some point I reckon.

And LJ, correct about the injector orifices. They're not quite deep enough, but a little augmentation will have them juuuuust right.

[LJ851]

I think the injector orifices in the earlier manifold are not compatible with electronic fuel injectors, some adaptation may be required...

You should have someone airbrush to banana tubes to look like actual bananas.

[2mAn]

So I'm at the pullpart yesterday cause they had this old 1977 530i. I had seen pics of the intakes on older m30 motors and they kinda talked to me. They are made up of 9 separate pieces. 6 U-shaped runners that connect the "log" to the 2 actual intake flanges. The possibilities are endless. Think, what could be mounted to these U-shaped pieces. Hint: It's a supercharger manifold. Oh crap that wasn't really a hint...

You could also go with ITBs or Carbs... Very cool indeed :up:

[LJ851]

What kind of manifold is the one on the left? It does not look like a B34 port shape.

[Ether-D]

I'll let the pics do the talking. Then I'll talk.





Yeah, so a little smaller, but I think a die grinder could do wonders. The inside diameter of the runners (u-shaped) is 1 3/4". The dimensions of the runner at the head 1 5/8"x1 1/4" so significantly smaller for to speed up the air. I'll likely just grind off the bump and go with it.

[slammin.e28]

Get the "logs" off of an e21. They are an upgrade.