Interesting Intake Manifold Design
 

Engineering is fun :P

Check out the angles on the air horns. Very pimpin design.

seema like its a good design

The last post where he talks about it being completely modular is the sweetness. The ability to swap out runners / plenums to get the best torque curve and highest peak hp out of any particular setup would be awesome.

what was the point of pointing the horns in different directions? seems like the reduction of flow interruptions from neighbor horns is negated by horns pointing at walls.

third post down. bigger horns with no overlap.

Interesting design. LOL at the soap opera. Looks like every forum has at least one.

nothing new to his design at all. Can-Am cars from the 70's ran tuned air horns.

http://www.mathewscollection.com/ima...tail11_450.jpg

I like that design. Looks like he put a little thought into it. Makes sense though, I always hated how my carb air horns on my RX7 had to be hacked up to make them fit side by side.

That Can-Am intake looks like a bunch of wild mushrooms.

they're not referring to the horns, everyone uses them. it's their offset and the modular design that makes it different. switch plenums with 3 bolts

Attachment 204556

Modular is bad ass.

Moduar is a great way for a seller to sell more parts, too! Not too many would dump full value for a new mani after buying one, but a couple hundred for modular parts? You bet. Good marketing.

I agree 100% on the modular intake, that is a great design. But remember Can-Am cars were mostly powered by Chevy or Ford V8s. They had no way to easly change intake runner length. So they would tune the engine with different velocity stack lengths. At Laguna Seca I saw a McLaren run velocity stack that were easly 18"s long. While the same McLaren at Sears Point ran 6" velocity stacks.

So back in the 70's this was kind of like your modular intake idea, but for V8s

where's neogenesis with his raging tromboner idea?

you know its an awesome idea.

This is making me want to design an intake mani, but I dont have a built engine. It would end up going to same way as brain's; i'll never be willing to push enough power to make use of it.

I have a friend that is a CNC machinist who can make the flange and air horns, Sbkcocker is an aluminum fabricator and my girlfriend can design it in CAD (she's a drafting assistant) while I go down on her. Starting to sound like a plan :)

Bump. Anyone interested in a group buy for a manifold like this? I got in contact with the guy who builds these and he is interested in doing a manifold for us. 1.8, because that's what I have. (don't fucking ask about your 1.6 in this thread.)

He is throwing around words like "robotically TIG welded". I asked him for prices and CFD analysis. I will keep everyone posted.

I would DEF be in! I would need some time to gather the money for what it would probably cost, but I'm guessing it would take a bit to get these made. Planning on building an engine this winter, and this will come in handy.

I've got no budget, but I'm assuming you can't anything else near the right front fender inside the engine bay?

I'm very interested, just not willing to wait forever to get one. First vendor to bring a worthy intake manifold to market will get my business.

I can't anything too.

What's wrong with the BEGI cast piece?

i can edit my post and your post. I <3 power.

psh. 1.8 FTL (just kidding)

Hi guys this is James from BMC
Thanks for the nice compliments on my new product. That is the first and therefore is a prototype with lots of improvements to be made.

I was linked here by Savington and made aware of the need of some quality high performance products in the Miata world.

Now let me introduce my company.

BMCRace is a family owned and operated business and has been around since 01.
We are currently outfitted with 3 HAAS CNC Vertical Mills and 1 HAAS CNC Lathe. We will be taking delivery of our new Motoman HP20-6 Robotic Tig Center by August 14th. We are currently taking a step into high production intake manifold fabrication (thus the robotic welder) and are looking for new markets. We also provide our services to supplement other companies as well.

BMC is owned and operated by
Sam Goertz (my father)
Gretechen Goertz (my mother)
James Goertz (me)
Louzee Banaga (my girlfriend and future wifey)
and shop mascots Duke and Toby (black lab and laso apso)

We would be very interested in doing some intake manifolds for the Mazda world and would prefer to find someone who would be willing to market and sell them for us as we prefer to have others sell our product line so that we can keep things on a higher production level.


Thanks
-James

Now thats how a new members first post should be. Welcome. Can I has intake manifold please

Design and production won't really take that long.
To get things moving we pretty much need to get hold of a factory intake manifold and in contact with someone knowledgeable of Miata

We take the factory manifold and design the head flange and anything else that might be a requirement (air sensors or whatever). Then we just need someone to measure around in a car and let us know of clearances and anything else we may need to be aware of. From there I begin 3d design of the parts and have things verified by set Miata Guru and we move on to production with 1 prototype piece and then the final production product.

Whoever is willing to be my helper in this project will get a substantial price reduction for helping us to develop a new product (this could be as much as free to this person depending on how things move). Right now things are grim for most industries but with a little ambition I believe it is a good time to move onto new markets and get R&D work done while things are slow.

Also I prefer not to use up my welcome on this forum as I know I am basically advertising right now, I would love to be a sponsor here and make a nice contribution if we can all work together on this. Please don't remove my threads or anything as we try to make progress, I am low on funds right now for advertising due to other investments however I know things will come around..

Thanks
-James

James,

Can you put your location in your profile? No doubt there's someone nearby that wants a shiny manifold at a deep discount for helping you.

If you are in/near Chicago I have a Miata just sitting in my garage you can keep until I get home in December.. :D

Welcome to BMC Racing Products - Welcome to BMC Racing Products
281 Area Code is out of Houston, Tx.

James, there are some inherent design compromises with the various OEM Miata intake manifolds... packaging and no consideration for forced induction... as you would expect. This community has been waiting for a long time for some "production level" competition in the manufature of aftermarket intake manifolds in particular. There are quite a few one-off designs and a Bell Engineering (BEGi) should release the first true production plug&play aftermarket IM for the Miata very shortly.

There are 2 basic engines, a 1.6litre (90-93) and 1.8litre(94-05) that use different IM flanges. At some year, the 1.8 cars also had EGR.

I think the market around here are guys looking to push 250-350whp with somewhere between 15-30psi. Over that amount of power, and a dedicated design would be required. There should be consideration for using the stock throttle body and an aftermarket BBK one (I think a certain aftermarket model for 5.0 Mustangs is favored). It would need a bracket to exactly mate up with the stock throttle cable attachment, and several vaccum ports at factory locations.

I can send you a 1.6 manifold tomorrow and offer my time with anything else you would need.

Thanks.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote

Do yall know if the 1.6 and 1.8 have the same port spacings at the head?

The way the manifolds are built they are all modular and if they were spaced the same it would make production alot smoother. Basically it is as simple as unbolting one flange and bolting on another, this would also potentially be a nice feature for anyone wishing to upgrade their motor, the manifold would only need a minor change...

As to the throttle cable bracket and what not, that is easily replicated as long as my source for replication is complete (thus I prefer a factory manifold). To clean up the look, if possible, I prefer to relocate all vacuum ports to the bottom side of the plenums just to give a cleaner "shaved" appearance.

As to Throttle Body options that is pretty simple, I basically leave that option up to the end user and weld the flange that will fit his/her application.

Because I don't have enough post here yet it is giving me some problems for getting back to some peoples pm's, however some are going through fine. Feel free to email me at sales@bmcrace.com if you find yourself not getting any pm back as this is probably the problem.

We are serious about developing this product and we intend on moving swiftly. After I receive a factory manifold and get all necessary drawings made (flanges, etc) I will begin 3d design and begin to update with progress pictures.

-James

As to design things can be quite complex or quite simple

Here is my budget design I am currently working on for the Honda guys.
The velocity stacks are raised .5" off the floor in this design so to not interfere with the threaded holes for the modular design, this also gives us the ability to run a larger velocity stack aswell. Also when the stacks are raised in a manner such as this is does a good job at encouraging air into the the first 2 cylinders (these 2 cylinders are typically starved in all typical log style intake manifolds)

Attachment 204469
Attachment 204470
Attachment 204471
Attachment 204472

This plenum would be built from Ross D Shaped extrusion, we would machine each oval velocity stack from 1" 6061 t6 and precision machine the plenum floor for the stacks to fit into and the threaded holes. There would only be 6 welds in this entire manifold design, the throttle body flange, the end cap and the 4 velocity stacks. The end product would be something very similar to:
http://www.rossmachineracing.com/ima...praintake2.jpg
http://www.rossmachineracing.com/ima...praintake3.jpg

Although not as elaborate this manifold will still produce great power while remaining budget friendly (something this economy needs right now)
My plan is for this style of manifold would run for around $600 and that price includes matching fuel rail and hardware.

As to our machining capabilities and qualities here are a few pictures of a 100% billet dodge viper manifold we are in the process of building for a personal friend.

Attachment 204464
Attachment 204465
Attachment 204466
Attachment 204467

The ports must still be opened up inside the plenum, the top cap is almost finished, also we still need to machine the velocity stacks that bolt to the ports inside the plenum (this is also a modular design by varying velocity stack lengths inside the plenum)

BMCrace: go ahead and post a few more quick posts to get up to 10 posts so you can send PMs. I'm going to allow it since there's a lot of interest here. Do what you can to keep interesting information public though!

And no, the port spacing on the 1.6 and 1.8 are different unfortunately.

Sorry to add this to the thread. But honestly guys, I wouldn't do business with him. He is saying he's reformed, but he has a history of not delivering and making lots of excuses. Saying he fixed all the issues and everyone over on HT knows that is BS.

I've been around Honda-tech for ages and remember it all going on back then.

Stick to supporting the current companies that support the Miata.

Well that's not good. Lets give BMC a chance to rebut. As for giving current vendors a chance, if they would get off their asses (begi) and put something out with proven numbers then they would have buyers.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote

He'll say what he said on HT. That he resolved all the issues and all that stuff is water under the bridge. Anyone can say that though... doesn't mean its true. There is just no reason to give trust back to someone who isn't IMMEDIATLY local to you after they have proven themselves in the past to have problems.

I just would prefer to not watch you guys go through the same stuff others did in the past. Who knows, it might not happen badly... but why risk it?

Talk to BEGI on the phone. Call up Flipside. They will make stuff for you and you KNOW they are trustworthy, no past histories to worry about.

What kind of problems have they had? If your talking about taking people's money and not delivering a product that's one thing. But are they really any worse then say Begi with shipping wrong parts, being slow as hell, shipping stuff that dosen't fit/work?

Give us more details.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote

BMC has been around for a long time, we supply flanges to numerous companies, many of which sell their products here on honda-tech.

When I was 18 I decided to open my own business up under the name JG-Fab which did get a stain on it for bad customer service. However nobody ever got scammed, yes there were some unaccepted able turn around times and some people had been refunded but everyone got what was fair in the end.

I had decided that I am not cut out to run a business on my own so I had taken a hiatus and worked for some other companies for about 2 years. I had been schooled in robotics and decided as the economy went under that I would be better off working with my family's company (BMC which is short for Boerner Manufacturing Company) to help them stay above and really help to rebuild and improve on my past mistakes and really make a turnaround.

So sue me if I am putting forth my best effort to turn a new leaf and try and become a better person. I am sure nobody else out there has ever made a mistake during their crazy years (18-21)...

BMC is a family run business, Mom, Pop, Son, and Girlfriend all make it up. If you want to burn on someone burn on me (James, JG-Fab) for being a dumb kid who thought he could run a business all on his own, but don't say anything about the rest as they had nothing to do with it (BMC). We have over $280,000 invested in our business and have just made a new investment with our robot which is going to put us well into the $350K+ range when it is fully setup and operational.

-James

As I had said, he can only really say the same thing he said on HT... ie: cut/paste it.

Sorry James, but words can only do so much. That goes both ways of course, people can make up their own minds on all this.

from a few quick searches.
http://www.honda-tech.com/showthread.php?t=2333307
http://www.homemadeturbo.com/forum/f...-hes-back.html

An aside, I got an adapter flange from his dad and did fine with his Dad. I know people periodically had issues with his dad BMC race, simple things though like misshipments or out of stock delays (thats normal small business errors). James's stuff was in a whole other category of bad business though.

Well, I'm willing to give you a chance. You have the opportunity to really shine here. A lot of members here have been waiting for someone to put a proven IM out there. I can send you a 1.6 and 1.8 mani and I guess worse case is Id be out those 2 manifolds.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote

A few more.
Who else makes this flange ? - Honda-Tech
http://tiny.cc/rhmt

Geezus
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote

Up until a few minutes ago I was going to send him a 1.8 manifold, not any more.

Yeah, I'm feeling the same way.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote

win:

Attachment 204462

Really, the pic above doesn't surprise me (or bother me) in the least. We are only talking 1/16" or so. With the junction of the tubes being over a foot away, you could take those two runners and move that flange 1/8" easy by hand. It wouldn't be a problem when installed. With that many welded segments, I wouldn't have doubted in the least that there was some built in stress that was relieved when the flange was cut.

That said, I'm not standing up for the seller, just the result. I have read enough on the other threads that I would not chance doing business with him, but that is just me.

Well I am sorry for making mistakes, then doing all I can to cleanup. I can say I am a changed person but if that doesn't amount enough for you then I am sorry.
If people only knew the truth then maybe things wouldn't look the same.

I'm ok with it too. ETD produces manifolds that do the same thing. Mine did. Seals fine.

Well I for one have an extra 1.6 mani that is going to do nothing but collect dust and i'm willing to be the guinea pig. But it wouldn't really help most of you 1.8ers out...

I'm all about second chances. If landlords didn't give me "second chances" i'd never be able to find a place to live due to a collections from my first apartment when I was 18.

Get your post count up BMC.

Thanks for being willing to give me another chance.

If I must I will buy a 1.8 intake manifold off ebay or something of that nature so that I can go about making the product on my own.

As said above thanks again for giving me another chance
-James

I'm going to go ahead and send you a 1.6 mani. I'll send it out tomorrow.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote

Ok thanks,
It will be well worth it.

Well I ordered some material for doing a local guys intake manifold. I should have enough when left over to build a prototype 1.6l manifold as well. I did some computer drawings last night on a more final design for my budget honda plenum I will post them up later this evening when I get home.

Basically the entire floor will be one billet piece with my new drawing. The stacks are raised off the floor still as well. This will reduce the amount of welding considerably, there will only be 4 welds on the entire plenum.

Curious as to what performance increase we're expecting to see for example on a 94 head with a GT2560 at 14.5psi. Sav, what are your expectations on your 99 head?

Wow, can't believe I missed this thread!


I am local.

I would be interested in helping design a manifold for the Miata, and could use a discount on a 1.6L Miata.

I can also swing by the shop and meet the family if anyone needs reassurance.

Do it, I'm shipping him a 1.6 mani today.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote

Come on by man.
Our address is
21819 Katy Freeway Suite B112
Katy TX 77450

We are located at I-10 and Mason Rd right behind the discount tire, or right by Truck FX

I (James) tend to work evening from 12noon to 9pm my old man is up here usually 12+ hours a day from 7a to 7p

-James