If going straight back is not a good idea I would be down for getting the test pipe from Sector111 and working from there.

Again thanks for your help,
--J

 

What size piping is the Evora's exhaust system? 2.5" or 3"?

 

Not sure yet - my car is still in Dallas because the repairs have not been completed from the drunk driver plowing into it.

Right now I am just trying to make a plan of action so when my car arrives I can get right to work on this.

--J

 

And after reading on S111 about the Larini exhaust they have and the Supersprint that is available for the Evora I'm going to say it has a 2.5" (65mm) set of pipes.

 

Thanks.. I was wondering what size valve to buy for my own custom exhaust setup. The guys at my muffler shop suggested I buy the parts in advance so they can do the measurements when they take off the covers.

Quad tips would look pretty awesome however it would require a custom rear grill.

Seeing that your muffler is that small, I would totally go straight back. The benefits would be pretty significant:
- Healthy weight reduction (over 40lbs worth of steel). Stock silencer is 37lbs+10lbs of accompanying steel tubing & front resonator. Colin Chapman would approve
- Shorter, less restrictive exhaust gas travel
- Less surface area to generate heat in exhaust bay
- Increased clearance means you can do some major heat wrapping.
- All of that adds up to tremendous reduction in radiant heat transferred to engine bay, improved throttle response, greater horsepower and improved overall power-to-weight.

I don't think it could be easier than that for any muffler shop.

I would love to hear it when you have everything done. My custom exhaust system is still in the works and is not nearly as simple...

 

I promised Flowmaster that I would do what I could to get the info out there about this muffler And I intend to. I just wish I had some welding skills to do this myself but alas I do not.

Saving 40+lbs does sound like quite a nice savings.

--J

 

Well, seeing how small that muffler I would be very interested to seeing what is inside. I wonder if it uses the same dual-cone construction as their hush power series.

 

Would love to hear what kind of note that exhaust gives.

 

In a month I hope to have my car back and this installed. Once that comes around I'll be posting before and after sounds and I hope to do a nice write up on the fabrication too.

--J

 

Using a straight through setup as I would like - will I be needing to relocate anything that might be attached to the silencer?

Thanks,
--J

 

Is that new muffler really smaller than the cat?

I have a slightly bigger 2bular muffler on my elise, and it's damn loud. It's bearable putting around town, but on the highway or open throttle, it's obnoxious. At my last track day, I had strangers coming up to me and teasing me about how loud it was.

-edit-
Here's mine:
http://www.lotustalk.com/forums/f95/fs-2bular-ultra-5x16-102988/
It looks like it's smaller diameter, so yours might not be so bad.

 

You really have to remove the factory headers if you want to have any kind of ripping V6 exhaust note.
With a Pre-cat in each header PLUS the main Cat, even the "Sports Exhausts" have a job making themselves heard.

Factory header:

Shopping trolley standard - just get the Pre-cat in there:

There's a good chunk of power and torque to be had from getting rid of this:

Good luck!

 

As for removing the cats, I don't plan too right now. If I am not happy ill maybe call up supersprint and see what it would cost for just the headers.

Or fab some who knows lol.

 

Good news. The muffler project has been taken up by my previous shop where I got my 911 worked on.

I'll update once we put things together.

--J

 

Flange and temporary tip should be ordered today so I should have something substantial to post next week about install, recreation, and most importantly how it sounds.

If there is a good Dyno in OKC that anyone has heard of I would be willing to run it there as well and get that posted as well but seeing as I have never done that - I'll be asking around to find a place lol.

--J

 

If you Dyno do a before and after if its not to late. Always good to get a base-line before the mod.

 

Definitely not too late - I just need to find a location first. I'll look this afternoon and make a couple calls.

 

For N/A I recall that you need some back pressure or you may lose some HP. Or.. You may lose Torque to HP... Memory going fuzzy. Was the flowmaster made for a 3.5? How did they size it?

 

They made it for a 2.5" intake and out. The actual can area is 5" I believe with 3 baffles for muffle and backpressure.

2 examples. I can take better pictures of mine if you wish.

 

I'm anxious to see how this turns out-any forecast on completion date?

 

I will be putting a concerted effort forth to find the right guy in the next couple days to get this together. My previous attempt had it for a month and gave excuses as to why it wasn't going forward and finished with "I'm just too busy" and gave it back to me yesterday... So I start again.

 

Ok so I found a new place to take on the project. Should be done soon - I am hoping that I can get away tomorrow afternoon and have it done.

Still no proper tip but a straight pipe for now will suffice.

 

Completed the Exhaust.

Link is here.

 

I'm going to resurrect this link since we have some leftover funds lying around and wanted to know if there were any exhaust updates. I'm deciding between getting the Plack exhaust and bolting it on, or having my tuner fabricate one of his custom exhausts for my 2011 NA. I told my tuner that if we do fabricate a custom exhaust he should aim for a more "throaty" tone, and I would like carbon fiber tips instead of stainless steel which he said he was able to do. Either way I'm not coming out of pocket for this, but the Larini, being more expensive would cost me a few dollars more. I do prefer the sound of the Plack anyway.

Are there any updates since this thread was started in 2012?