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Turn Up the Volume! Mishimoto's Fiesta ST Cat-Back Exhaust Development

J2FoRS

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#61
Personally I'm a nice double rolled polished kinda guy or even a nicely done pure black.
 


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#62
What difference is there on the EUDM version? Is it just that the bumper is closer to the body so the exhaust tips would be shorter?

Otherwise they are identical. Semantics aside.
As far as I understand it you're correct as I have seen a US exhaust fitted to EUDM versions and vice versa. Although it's rare and haven't heard comment on fitment issues if there were any. Hanger location could be a concern.
 


XuperXero

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#63
AFIAK, hanger locations are same for USDM and EDM models. Just the bumper length which makes exhaust stick in when EDM exhaust is on USDM model and vice versa. I believe Pelotonracer said it was about 6 inch when he got his Scorpion exhaust.
 


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#64
AFIAK, hanger locations are same for USDM and EDM models. Just the bumper length which makes exhaust stick in when EDM exhaust is on USDM model and vice versa. I believe Pelotonracer said it was about 6 inch when he got his Scorpion exhaust.
Thanks for chiming in Xuperxero. 6 inch is significant that's for EDM exhaust on USDM. Be great to have some feedback on the other configuration if it's out there.
 


XuperXero

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#65
Thanks for chiming in Xuperxero. 6 inch is significant that's for EDM exhaust on USDM. Be great to have some feedback on the other configuration if it's out there.
That's exactly why I haven't bought an exhaust yet. I especially like the COBB, but it already sticks out a lot on USDM cars... imagine that + 6 inches on our EDM cars.
 


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#68
Nice! pre order sale? Think of us on the other side of the world who pay half the total cost more just in shipping ????
 


OP
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mishimoto1

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Thread Starter #69
Nice! pre order sale? Think of us on the other side of the world who pay half the total cost more just in shipping ????
Yes there will most likely be a pre-sale once we near the end of the development process. We do suggest checking with one of our Mishimoto authorized vendors if you are an international customer as they may be able to get our product to you at a better shipping rate. Once the product is available for sale of course. Through a vendor it may take a bit longer to get to you but it may be a better alternative to international shipping costs. Let me know if you need any additional information on this.
-Sara
 


J2FoRS

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#70
Can't wait to hear more sound clips and see the final product! Hopefully intro pricing is affordable!
 


OP
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mishimoto1

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Thread Starter #73
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M

mishimoto1

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Thread Starter #74
In our last post we took a good look at the stock Fiesta ST exhaust and the initial design of our cat-back exhaust. The exhaust was fabricated and installed on the car and then it was time to test the stock system.


Getting ready to test some Fiesta ST parts

To Resonate or Not to Resonate
Getting the sound just right was quite a process. Our initial prototype featured 2.5? piping with a single rear muffler. This design did not feature a resonated mid-pipe unlike the stock unit. The initial design was sound tested on the dyno and also test driven by several members of the team. While we loved the low growl of the exhaust as it was, we wanted to test a resonated version before settling on a final design. As with all exhaust development projects, we are aiming for a final product that sounds great on throttle while still being volume friendly to daily driven Fiestas. So we set out to test both a resonated and non-resonated option.


Resonated and non-resonated Fiesta ST exhaust


Resonated and non-resonated Fiesta ST exhaust

First we needed to create a resonated pipe in order to test both versions of the exhaust. We cut out the center of the portion of our exhaust piping and added a bolt-in resonator section for testing. We kept the original section of pipe and added clamps to make this section bolt-in as well. This allowed us to test the exhaust with and without the resonator relatively quickly. The tests that were conducted were purely for sound purposes as we would test the winner more thoroughly later.


Fiesta ST exhaust with resonator


Fiesta ST exhaust without resonator


Fiesta ST exhaust with resonator

Sound Testing
Once we had the resonated and non-resonated pipes ready for testing, we hit the streets to let both versions of the exhaust plead their case. There was great debate throughout the office as to whether the Fiesta sounded better wild and free of a resonator, or whether a tamed resonated version was the way to go for a subtle hum. Many weighed in on this important matter, sides were chosen, and we eventually came to a conclusion. Drumroll, please!


Getting ready for Fiesta ST parts testing

Our final design will feature a non-resonated single muffler setup as seen in our initial prototype. We found that adding a resonator made the exhaust too quiet, with sound that resembled that of the stock exhaust. As enthusiasts we want to hear our vehicle roar, so we let the Fiesta be heard! As promised, here is a clip of some behind-the-scenes road testing of the exhaust. Check it out below!

[video=youtube;2vD1ka7abdg]https://www.youtube.com/watch?v=2vD1ka7abdg&feature=youtu.be[/video]

On the Dyno
After we were certain of our exhaust design, we tested the exhaust on the dyno with the stock downpipe. As expected, we saw no power gains with the exhaust alone. Still, the larger piping featured in our exhaust will allow for more flow and set us up for power gains with the addition of other modifications.


Fiesta ST exhaust testing

Coming Up!
Now that we have chosen an exhaust style, we are going to concentrate on choosing tips and getting this exhaust ready to sample! Stay tuned for more updates on this as well as other Fiesta ST parts!

We thrive on your feedback and love to hear from you on the development of our Fiesta ST parts. Let your voice be heard and vote on the tips you would like to see on the Fiesta ST exhaust!
Vote HERE!

Thanks for Reading!
-Sara
 


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#75
Now the "S" is about to "HTF". Get ready for the..."No 20HP gain?" comments.
I digress, it sounds good guys.
 


Young L

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#76
Power pulls are cool and all but what about highway cruising? the 3-4k rpm range can be a bad area to be in depending on the exhaust
 


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#77
[MENTION=1848]mishimoto[/MENTION] Did you run the stock tune on the dyno? It would be useful to see Cobb stage 1 OTS + your CBE on the dyno...
 


OP
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mishimoto1

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Thread Starter #78
Power pulls are cool and all but what about highway cruising? the 3-4k rpm range can be a bad area to be in depending on the exhaust
[MENTION=1848]mishimoto[/MENTION] Did you run the stock tune on the dyno? It would be useful to see Cobb stage 1 OTS + your CBE on the dyno...
Now the "S" is about to "HTF". Get ready for the..."No 20HP gain?" comments.
I digress, it sounds good guys.
Thanks for the kind words guys!
This round of exhaust testing on the dyno was with a stock tune. We felt that this was the best way to honestly test our product without any additional factors to influence the results. We are certainly open to doing additional testing with a tune in the future, once we complete testing with some of the other products we have in the works. The exhaust was tested on the highway in normal driving situations that a daily would encounter and the non-resonated exhaust was not overly loud in that RPM range, though obviously louder than stock. We will be using the cat-back exhaust on the Fiesta ST while we are testing our downpipe setups, so you will get a chance to see how the exhaust and downpipe perform together on the dyno. Stay tuned for more coming on this and we really do appreciate your feedback!
Thanks!
-Sara
 




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