high power-low db prototype muffler
 

ODM project sneak peak

Happy driving,
Team Ace

Could you please tell me/us what style of muffler is this? That is, is it baffled, straight through? Is there packing material involved that is going to age and result in a louder muffler?
What are the chances of a single exit muffler with the same design criteria of high flow low noise?

Initial impressions is that the exits hang too low, it doesn't look quite right. Might depend on larger tips but those look smaller than OEM.

This is a little OT question, but I have always wondered, why when the packing material has "aged" there will be an increase in volume?

It doesn't age per se - it gets moved around and compacted as a result of the exhaust flow and thus doesn't absorb sound as readily as time goes on.

Hey Snooze, muffler has a unique baffle design. Since it is not ours that's all I can say.

There is no packing material.

It's up to the designer if they want to do a single exit version. But everything is possible

If the general public thinks it's too low it's a simple thing to modify. Again, up to the designers.

The tips are from a factory FR-S which are small to begin with.

Has it been tested with ace header and front pipe? ;) Any sound clips or videos? I can't wait to ditch the rattling stock axleback!

Im in for single exit weight saving version

Car has Type B350 with OEM FP and MP

Not the best video...constructive criticism is greatly appreciated

[ame="https://www.youtube.com/watch?v=pcc_yUqpuwQ"]ODM prototype - YouTube[/ame]

WOW! Thats quiet!

I think for someone looking for a near stock sound it will be perfect. However while I'm okay with the DB level, I wish the exhaust note was sharper.

Sounds good to me, I'd want that if it was a full catback plus bigger tips.

.ck

Yeah, I think bigger tips are a must. Say 4", angle cut to match the angle of the number cutout.

Excited!!

Any plans for full catback?

4.5 / 4 inch tips? Ti option? Ballpark Eta? (i know thats a little obnoxious to ask so early in the r&d, but if you think you'll have the first ones out within a year I would definitely wait).

Just installed Ace header and in the market for a catback now.

Love your products !

Phil

At what point would this be needed over stock OEM catback? Can you test gains, if any, from using this rather than a stock catback?

I think it's a good start, but needs some work. Here are my thoughts and concerns:

1. I think it fills a void in the marketplace, because people that run headers are very limited in the choices available for exhausts that are well made and quiet.
   
   
2. The exhaust note is quiet, but not very appealing.
   
   
3. I am only luke-warm on the design. There are many exhausts available that seem needlessly complex and while yours is reasonably straightforward, I would prefer it to have a front inlet (like Perrin Performance) with short side outlets. This is lighter without the goofy appearance that comes with front exits and long curving tailpipes. I would also be fine with a side inlet and short side exits - anything other than the current design and preferably one that is simple, elegant, and lightweight.
   
   
4. The exhaust tips sit too low.
   
   
5. The long curving tailpipes and OEM tips are not appealing. I don't think you need to have crazy-big tuner exhaust tips, but the tailpipe diameter needs to be larger and the tips should be understated and of good quality.
   
   
6. If you have to stay with this design, I would prefer there be symmetry in the positioning of the bolt on flanges for the left and right long curving tailpipes - I would suggest that you move the right side flange closer to the muffler to mirror what you currently have on the left side. I know it's a minor detail, but the asymmetry kind of bugs me.

Good luck - it looks like a great start and a nice addition to your very respected header.

It looks and sounds almost 100% stock from the outside. Perfect!

The left tip might be hanging a bit lower than the right, but I'm sure that could be easily fixed.

My only question is, at what point will this become restrictive?

I don't care how you have to manage the pipes to make this work. Please post up some videos of how it sounds with a full headerback exhaust with UEL and EL manifolds. If you can quiet down the UEL sound without any power restriction and rasp then you may have a winner. It looks like this muffler is designed to be used with the stock piping, this might be a no-go for some people since the stock midpipe necks down significantly to make that last bend.

Anyone looking for a quiet exhaust will compare your product to the invidia q300. What does your product offer over the q300? The main drawback to the q300 is that it's heavier than stock and perhaps too quiet for some.

I suppose the cat is out of the bag.

We'll have some updated clips soon, as the primary purpose of this design is to meet our (rather exacting) goals.

- Under 90dB from 30 ft, 30 degees offset from the rear, to the right of the car.
- Unrestrictive to power
- OE look for those that want to remain stealthy.
- Not rattle like the OEM muffler when there are no cats.

- Custom tips can be added upon request, or added by the client
- Single and Dual outlets are available, but the core muffler design will not change.

It really seems quiet. I like it as good to see more catback choices alongside Q300 to consider for those not wishing to annoy neighbours or cops :). Even more so that it's still not too loud even with catless header.
Whatever with loudness levels, as there is little to be gained from catback powerwise and most are buying catbacks just for sound, it HAS to enhance sound tone enough for many to consider purchase. 500-1K$ for guesstimated +5(10 with stock?)whp and lighter weight has to provide more value. Like Ace header does :)
I guess with this design there should be no issues of rear bumper parachuting aero-wise, right?
Tips wise .. they maybe easily interchangeable and that's good.. but i don't like how currently inner pipe sticks in clear view of bigger tips. Results in very cheap looks, like as if tips were bought for cheap and put on as ricing afterthought. And don't know how about other drivers, in daily driving/parking i often go rearwards (over eg. curb) using fact that rear is higher. So i would prefer tips that are more in line with rear bumper cutouts.
If/when someone will make future videos, imho it's worth to make direct comparison with stock and average aftermarket catback. Without "baseline" hard to evaluate real noise level.
"unrestrictive to power" .. i guess this will show most gains with stock header (and hence if dynoing will be done should be done with stock, no?). Together with Ace header imho gains will be too small due gains by header alone nearing point of diminishing returns for bolton NA addons on these cars, hence catback+header may look worse power wise then it might have been if stacked against those of competitors, no?

I like the idea of this muffler and to run the OEM 2014(JDM) tips. As long as the price is reasonable, I'm in. I just took off my Tomei 60s as it is a bit too loud for my taste, but the weight savings almost justifies the noise.

How does this compare to the stock muffler?

Yeah does anyone know stock exhaust sound level in db?

Single exit would be cool if it retains near stock sound level and no loss of low end torque in NA form. I just don't want highway drone. That's the big one for me 2nd to torque.

It sounds nice I but you should offer another version of the exhaust without the oem look. :iono: I mean personally if I wanted to keep the oem look I would have just removed 1 of the cats.

Also weight? Why would someone buy this over another "quiet" exhaust. invidia or perrin style?

Weight reduction.

I see potential for fatigue failure at the areas circled. If you send me a second prototype I'll be happy to do more evaluation. :D

http://i.imgur.com/tc3MOVv.png

very interested here. would love to be able to preorder

My question was what is the weight :thumbsup:

BTW, why both ends are made different / not interchangeable / with welds and connecting place at different tube length? Imho making both of them same way might result in slightly cheaper manufacturing, no? And even if tips are not round but directional, if they are not welded on, it shouldn't keep from making ends same? Or it's this way only in prototype?

I bet it's a proto-prototype. :thumbsup: It's cool to see it this early.

Those other "quiet" exhausts are not quiet enough for our requirements.

I really do like how it sounds. Would like to hear it pull through 6K under load at WOT.

nvm. I see this is a work in progress. Nice.

http://i.imgur.com/UQNDPpY.png

Sorry, I was on my cell reading the post at a wedding. haha :bonk:

https://scontent-lax3-1.cdninstagram...36227222_n.jpg

Just sayin.

Follow CSG on instagram for the latest updates ;)

https://instagram.com/counterspacegarage

is there any pre-order information available?

Not yet; we don't even know if this will make it into production. It'll depend on if testing is successful.

Finally, for FT-86 owners without hearing impairment, something may be coming to deal with the very high noise level.

Thank you so much for your effort.

I will be very interested if an exhaust system is available to, in order of priority:

1 Reduce interior exhaust noise by at least 2dB;

2 No loss in power;

3 Good reliability (especially rust protection); and

4 No increase in weight.

When the final product is finished, in order to make an informed purchase decision, please provide the following information:

1 Interior noise, OEM stock vs New Product;

2 Airflow (power and torque), OEM stock vs new Product; and

3 Weight, OEM stock vs New Product.

Thanks again.

I think a better option for you would be to delete the sound tube, and perhaps add a few squares of dynamat to your driveshaft tunnel to reduce noise.