Brian's First ND Projects

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Brian's First ND Projects

Postby skeeler » Tue Dec 02, 2014 9:01 am

Brian,

I'm sure your already plotting your first ND projects. Can you share any of your plans with us? Once the parts become available from you and other manufacturers, I'd love to see a Street Touring build of the ND.
2009, STR & DD. 1995, HPDE. 2004 MSM, sold. 2010 Mazda3, hers.
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Re: Brian's First ND Projects

Postby Brian » Tue Dec 02, 2014 11:02 am

I am real excited about the ND, can't wait to get my hands on it. The mild projects will come first, they have the widest appeal, look to what we did for our Project 2012 as a guide for what we will do first for ND. That will mean the list starts with mild springs and sways, exhaust, etc. We will also jump quickly into figuring what wheel and tire packages fit.

Beyond these points I just don't know yet, will need to spend some miles in the car to understand what is there from the factory. For example, I have talked to Ohlins about getting my dream of getting one of the first ND and driving it all the way across the country to get it on their shaker table so we can start coilovers....that would be a fun trip of hundreds of miles per day that would really help me learn the the ND specifics.
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Re: Brian's First ND Projects

Postby skeeler » Tue Dec 02, 2014 11:30 am

Thanks for your reply. Now that you mention it, wheels and tires are an obvious early step. The first question will be whether the any 15-inch wheels (6ULs, Storms, Dial Ins, and PF01s, certainly not RPF1s) will clear the brakes. I'm certainly looking forward to what you can cook up.
2009, STR & DD. 1995, HPDE. 2004 MSM, sold. 2010 Mazda3, hers.
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Re: Brian's First ND Projects

Postby Chuck H » Tue Dec 09, 2014 2:40 pm

Cook up a straight thru muffler similar to the NC Street or Race single as one of the first projects. The one that's installed on the show car looks ridiculous. That rear valence is just crying out for a good looking small muffler, not the monstrosity that they have on the show car! :D
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Re: Brian's First ND Projects

Postby Brian » Tue Dec 09, 2014 3:36 pm

That factory rear exhaust cutout is a problem. Factory made it almost oval in shape, and just big enough to fit two SMALL tips in the street car, not big enough for two big tips, not quite right with one big tip you see on the race car, not sure what to do there. We could do custom oval tip to better fit the space but the extra BIG machine costs would make the final result pretty expensive. Will need to lay on the ground under there a while for a better look.


Image
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Re: Brian's First ND Projects

Postby skeeler » Tue Dec 09, 2014 4:12 pm

I think a single oval tip would look good while giving the cross-sectional area for good flow. I'm hoping you find a source for oval stainless tubing, so you don't have to incur those big machine costs you mentioned.
2009, STR & DD. 1995, HPDE. 2004 MSM, sold. 2010 Mazda3, hers.
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Re: Brian's First ND Projects

Postby skeeler » Wed Dec 10, 2014 10:33 am

Brian, do you know if aftermarket parts developers, such as you, will be granted access to the ND before release, in order to kickstart parts development? Toyota and Subaru did that with the FR-S/BRZ/86, and I would hope that Mazda would be eager to engage the aftermarket for their new halo car. I know you are geographically close to Mazda NA's HQ, so I'm hoping you will be involved.
2009, STR & DD. 1995, HPDE. 2004 MSM, sold. 2010 Mazda3, hers.
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Re: Brian's First ND Projects

Postby Brian » Wed Dec 10, 2014 10:58 am

I have asked...and so far Mazda not playing that game.
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Re: Brian's First ND Projects

Postby skeeler » Wed Dec 10, 2014 11:15 am

Sigh. It's good to know you are on top of the situation, though. It seems like it would be a great opportunity for essentially free publicity among the enthusiasts. Perhaps the car is not finalized yet, and once we get closer to release, they will decide to play "that game."
2009, STR & DD. 1995, HPDE. 2004 MSM, sold. 2010 Mazda3, hers.
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Re: Brian's First ND Projects

Postby Chuck H » Thu Dec 11, 2014 7:49 am

Brian wrote:That factory rear exhaust cutout is a problem. Factory made it almost oval in shape, and just big enough to fit two SMALL tips in the street car, not big enough for two big tips, not quite right with one big tip you see on the race car, not sure what to do there. We could do custom oval tip to better fit the space but the extra BIG machine costs would make the final result pretty expensive. Will need to lay on the ground under there a while for a better look.

Image


I think an oval tip would look pretty good. Not sure whether your exhaust fabricator has any existing tip designs that would fit the bill without you having to pay all the machining costs, though. There are a few reasonably priced options out there like this one, though:
Image
http://vibrantperformance.com/catalog/p ... cts_id=105. It's about $25 from Summit or Jegs, so I'm sure it's even cheaper at OEM pricing.

For a serious no-bling muffler like the NC RS Race (no fancy polished tip), maybe the fabricator could just expand the end of the tailpipe a bit and then flatten it somewhat into an oval without having to weld on a separate piece?
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Re: Brian's First ND Projects

Postby skeeler » Thu Dec 11, 2014 8:28 am

The problem with ovalizing the exhaust tip is that you will loose cross-sectional area and thus flow. The circle is the shape with the lowest ratio of perimeter to area. Anything else has a larger ratio, so reforming a circular tube into any other shape will result in less area surrounded by the fixed amount of perimeter. I think it's better to start with an oval pipe of the desired area coming out of the muffler or to add on an oval tip of equal or larger area at the end of the circular exhaust pipe.
2009, STR & DD. 1995, HPDE. 2004 MSM, sold. 2010 Mazda3, hers.
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Re: Brian's First ND Projects

Postby Chuck H » Thu Dec 11, 2014 10:28 am

Unfortunately, most of the commercially-available oval exhaust pipe starts at the equivalent to 3" round piping and goes up in size from there. I don't know of a source for 2.5" oval pipe or 2.5" round to oval transitions. So you're probably right -- it would need to be a weld-on tip on a round pipe.

Another consideration is that the SA-G motor is tuned more for low and mid-range torque than the MZR and isn't really a high RPM screamer. It may be a candidate for a 2.25" exhaust setup, rather than a 2.5" one. That would actually open up the door for a lot more choices of fabrication parts to work with -- both mufflers and tips.
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Re: Brian's First ND Projects

Postby Brian » Thu Dec 11, 2014 10:31 am

My guess right now is that best results will indeed be round tip and we will be using a single round tip.
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Re: Brian's First ND Projects

Postby skeeler » Thu Dec 11, 2014 11:08 am

Brian wrote:My guess right now is that best results will indeed be round tip and we will be using a single round tip.


I suspect you are right. I'd certainly optimize performance rather than appearance, and a single round tip would be the simplest way to get the desired flow. I'm looking forward to seeing what you cook up.
2009, STR & DD. 1995, HPDE. 2004 MSM, sold. 2010 Mazda3, hers.
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Re: Brian's First ND Projects

Postby njaremka » Thu Dec 11, 2014 1:26 pm

what if the exhaust tip was angled slightly (side-to-side) to help "fill" the cut-out? then add an angled tip for even more optical illusioning in the cut-out?
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