MyE28.com

http://www.666fabrication.com/m30/ for a couple more

Wastegate hasnt been added yet, still waiting on the flange. Havent decided 100% on pricing but it should be about the same as our e36 manifolds. Spark plug access w/o removing anything, will only fit tangential turbine housings and will accomodate any sized turbo you could throw at it (GT40R pictured). Turbine sits close to the a/c line if you still have one so heat wrap is definately a necessity there. Plenty of room for RHD guys as well.

Wicked man!

Very nice work. Love the stainless.

Very pretty work.

thats sexy as hell

OK, I'm looking at this, trying to find the advatagages . . . and I can't. So somebody PLEASE explain it to me, cause this is what I see:

The primary tubes are quite large, which makes for a lot of volume to be filled before getting to the turbine. This will increase spool time.

The primary tubes are of varying lengths. Which means multiple exhaust pulses will hit the turbine sometimes, other times there will be none. I remember reading that this is bad.

The turbo sits up high above the head. High center of gravity for an object with a large amount of mass will create a lot of stress on the tubular manifold. How thick is that steel and how strong are those welds?

Where would the downpipe go? Just eyeballing this picture, I don't see a lot of room for a good sized (lets's say 3 inch diameter) downpipe to fit with decent thermal clearance of it's surroundings.



Last one. Are the plugs wires on cyls 5 and 6 touching the manifold? Kinda looks like they are, and the rest are quite close.

Adavantages? 1. You can fit a really big turbo. 2. The really big turbo catches a lot of attention when you pop the hood because it's mounted up high.


Like I said, somebody please educate me, cause I'm just not seeing the big bonus here.

Jeremy

Advantages are the same as a stock exhaust manifold vs headers.

A tubular turbo will flow more air than a log-type. We TCD owners have a log-type manifold.

The log-type is much more durable and well worth the slight disadvantage with flow.

So I am limited to around 700 HP with a TCD manifold vs maybe 850 with a tubular manifold.

The numbers are all speculation on my part but you get the idea.

Hell, if you are worried about that amount on HP then slap on a 100 HP wet NO2 kit

One of the big advantages of headers is that they generally have equal length primary tubes. This is an advantage whether you're naturally aspirated or running a turbo and looking to make big power as the exhaust pulses don't bump into each other on their path to the tailpipe, but this system does not have that.

Shorty headers (unequal length primaries) add some hp too, but not as much as equal length tubes will.

Duke M535ti wrote:vs maybe 850 with a tubular manifold.

Manifold is almost identical in design to the E36 tubular which has been proven to 996whp with more to come. (Stock displacement M52 on stock cams)

Advantages are fitment for RHD vehicles, theres room enough for a 4" downpipe (bottom mount can probably fit this as well but dp clearence was questioned). All exhaust pulses remain separate untill they enter the turbine so there is minimal turbulance in the manifold. Manifold is sch. 10 stainless...almost 1/8" thick. Ive never had a manifold crack....ever. Theres also a lifetime warranty against cracking as well..if it cracks, we will fix or replace free of charge. Primary tubes are are 1.44" ID, I fail to see how these are "large". They are small enough to keep velocity high and still support 1000+whp. Just take a look at almost all the big power cars in Sweden. Most of them use short tubular manifolds. Equal length is simply not worth the packaging headaches unless your class racing and every last pony counts IMO.

jon volk wrote:
Manifold is almost identical in design to the E36 tubular which has been proven to 996whp with more to come. (Stock displacement M52 on stock cams)

Was that your e36 manifold?

Yes, that was an off the shelf E36 T4 flanged tubular we sell.

jon volk wrote:Yes, that was an off the shelf E36 T4 flanged tubular we sell.

Non equal length?

Correct, non-equal length.

That proves an equal length tubular manifold is unnecessary for almost every application.
Todd

T_C_D wrote:That proves an equal length tubular manifold is unnecessary for almost every application.
Todd

Your right, in fact whenever someone asks for something equal length I tell them a short tubular wont dramatically effect power output and will result in faster spool. We'll eventually be offering most manifolds with an option to be built in split-pulse configuration to make full use of divided turbine housings for even quicker spool.

I love it!


Should spool that nice turbo very nicely.


There are many many advantages to this design. You just need to design the rest of the turbo system to take advantage of them.