Digitizing the head flange and working up a program today, hope to be finished getting the programs written for the head flange on monday

If someone could help out I need the exact measurements for the ports at the head just to verify their size against the intake manifolds ports, also if most people port match to the gasket let me know so that I can just go pickup a gasket in town and shape the ports to that so that it is a completely matched setup.

-James

I'd prefer port matched to gasket personally. Although there isn't much difference, enough none the less.

I've got a few late model heads. Are you doing a 1.6?

I hope so, its the best of all the miata motors!

We are still working on this, Sam has nearly finished writing the program for the head flange and hopes to be cutting metal on the mill around this weekend or sometime next week.

good to know

Will this be useful for NA applications as well?

It should be just as beneficial there as it would be in a turbo setup so yes it should be just fine.

I would be in for a 1.8L one if it had even flow to each cylinder

The design and program has been finalized for the 1.6L intake manifold flange.
We are currently pushing to have our production Honda B Series intake manifold finalized by next weekend and once that is accomplished we will be 100% full focus on Finishing up the Miata intake manifolds.

Just finished off polishing
http://bmcrace.com/Manifolds/Intake-...d/DSC01927.JPG
http://bmcrace.com/Manifolds/Intake-...d/DSC01928.JPG
http://bmcrace.com/Manifolds/Intake-...d/DSC01929.JPG
http://bmcrace.com/Manifolds/Intake-...d/DSC01931.JPG
http://bmcrace.com/Manifolds/Intake-...d/DSC01933.JPG
http://bmcrace.com/Manifolds/Intake-...d/DSC01939.JPG
http://bmcrace.com/Manifolds/Intake-...t/DSC01917.JPG
This is our High Production Plenum in the works, the end cap will be billet as well and have 4 large npt ports to be ran to needed accessories

Here are a few pictures of the throttlebody flange in the works (still needs to have profile machined and holes drilled and tapped)
http://bmcrace.com/Manifolds/Intake-...t/DSC01912.JPG
http://bmcrace.com/Manifolds/Intake-...t/DSC01913.JPG
http://bmcrace.com/Manifolds/Intake-...t/DSC01914.JPG
http://bmcrace.com/Manifolds/Intake-...t/DSC01915.JPG

Unfortunately we will not be able to produce a modular manifold for the Miatas as the powerband is to low to get away with a straight primary, you would run into major clearance issues with the shock tower and other items because the runners would need to be so long.

I will have several pre made options though that will be to accommodate certain boost/rpm powerbands so that you may pick one that best matches your setup.

-James

The plenum keeps a constant volume throughout, it will also be ~4 liters in volume once end cap and throttlebody flange are attached.

did you mean constant cross-sectional area instead of constant volume?

because not many people are cool enough to run a variable volume plenum.

The variation in volume at the front of the plenum is within 10% of the volume at the back of the plenum, that is what I meant.
Or what you said is another way of saying that^

Here are a few pictures of another in the works (being built for the owner of Inline Racing, this one is a bit more on the back burner though, the Miata manifold will be finished and ready for production before this manifold is finished)
Pictured below is what will be known as our Pro Street style, this one is being built for an all motor s2k and we will be dynoing it soon.

http://bmcrace.com/Manifolds/Intake-...t/DSC01940.JPG
http://bmcrace.com/Manifolds/Intake-...t/DSC01942.JPG
http://bmcrace.com/Manifolds/Intake-...t/DSC01944.JPG

-James

Pretty slick, again. Nice job James!

Lets get going on the 1.8L. If the price is right im sure you would sell 3-5 right off the bat.

In the interest of helping out the 1.8 guys, James would you like me to send you a 1.8 mani?
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You could but I would really like to finish off the 1.6 First before getting started on something else.

I can do the fabrication work quite quickly but development work on new products take a while because it is going through my dad then and he really has to work on Paid orders first as if he doesn't we would go out of business. I really appreciate the patience you guys are having with us.

I am estimating it to still take another 1-2 months before we have a finished product for the Miata 1.6L at the moment however I will do all I can to get my old man to press a little harder and get something done sooner if at all possible.

-James

Alot of time had gone into construction of the forming tools for producing the plenum, many of the parts will be interchangeable as this plenum I have designed is to be for both my hondas, the miatas, as well as my upcoming Cellica and Elise intakes

The idea is that we will build and form the plenums all at one time (like 10 to 20 at a time) and cut out the bottom section for the plenum plates to be welded to. We will keep these in stock on the shelve and then as we get an order we will just weld the appropriate plenum base plate, as well as the selected throttle body flange and end cap profile. After that is the all other parts are just pulled off the shelf and the manifold is bolted/assembled together fully and sent to the customer (we will include all proper o rings, fuel rail, manifold bolts and standoffs, etc)

-James

No problem. I have it sitting here, so when the 1.6 is done I cloud send it to you.
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So I still haven't had the time to make it out to Katy...but I might be more motivated as a customer instead of just a forum member poking around.

I would really like one of these...but haven't seen price mentioned anywhere...

Can you give me an idea so I can stop daydreaming about it...or start saving?