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Discussion Starter #281
Megan Axleback???

Jim, you got me thinking about my exhaust and I'm glad you did! When the car was up on the hoist I got a true sense of how restrictive this Megan is. Wow! I spoke with Jesse today and he thinks my 2.5" exhaust will be fine for my setup once I get a straight through 2.5".

I've got to get rid of my Megan axleback on my 2ZR turbo application. I did some measurements today and was very surprised to see just how restrictive the Megan is. At the narrowest point where the exhaust tip attached to the muffler body it is ~ 29mm (1.14")! This may be fine for a NA Yaris, but the stock exhaust actually appears to have a larger diameter. I'm pretty sure that backpressure is limiting my car from reaching full boost. I won't be going anywhere near boost or likely even driving this can again until I can rid myself of the Megan and find an alternative.

This is not intended to criticize the Megan product, and I should have done better research, but it's still very surprising that a product with what appears to be 2.5" mandrel bent SS piping would narrow to basically an inch.

I used the handle from my pruners to try to gauge the inner diameter.

Megan narrows a LOT:



Inner diameter contact points:



29mm (1.14")



Stock Yaris exhaust 38mm (~1.5"). It may narrow down more at the muffler, but not by much, I expect.

 

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Discussion Starter #282
New exhaust solution

Rather than going through the hassle and expense of finding another rear mount muffler and paying an exhaust shop to do the work, I'm opting for a glasspack and SS tip. The 18"glasspack has the louvered design and will have just enough room after the CAT. The exhaust tip is 2.5" inlet, 3.5" outlet and 18" in length. I may have to extend the pipe a few inches with a small section of 2.5" and a couple of couplers. I got the tip for just under $12.00 (must be a clearance on eBay) and the glasspack for $27.00 and change. I'll do the install myself. Hopefully it won't drone badly on the highway. I'm optimistic that it will be ok since the Megan (although it has a larger chamber) is basically a glasspack, plus I just installed the CAT and the turbo is supposed to quiet things down a bit too.

 

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Discussion Starter #283
High-flow CAT installed

And, no 02 code after several drives. Not holding my breath, even though the oscillating voltages look within spec.

I love the reflective fiberglass tape. When it gets hot, the glue seems to further bond the whole thing together into a solid mass. I was very sceptical that this stuff stay on but it definitely seems to improve with a bit of time and heat.

I extended the harness about the needed 6 - 8" to reach the 02 sensor. As usual, all connections were soldered, heatshrinked and run through wire loom before being taped with the reflective fiberglass tape. Not a real OEM look, but, hey, I'm rarely going to see it. I'm going to pick up a few push mount cable ties to support the harness.

I've also decided that I'm not going to reinstall the heat shield. On hot days, even with city driving, I've not noticed the floor even getting warm. Another plus is that I can coat my whole tunnel with rust proofing.



 

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Discussion Starter #284
Exhaust concept

While awaiting my exhaust parts, I got thinking how neat it would look to have a 'dual exhaust' effect happening. I did a little mockup of what it might look like with two 3.5'ish tips. I think they look a touch big in the pic. Maybe 3" tips would look better. I was under the car this evening and there's definitely room for the piping.

Feel free to express your thoughts. I have broad shoulders, lol. Basically ignore the tip on the left if you want to get a sense of what it will look like with a single tip.

 

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Exhaust concept

While awaiting my exhaust parts, I got thinking how neat it would look to have a 'dual exhaust' effect happening. I did a little mockup of what it might look like with two 3.5'ish tips. I think they look a touch big in the pic. Maybe 3" tips would look better. I was under the car this evening and there's definitely room for the piping.

Feel free to express your thoughts. I have broad shoulders, lol. Basically ignore the tip on the left if you want to get a sense of what it will look like with a single tip.

I love it!!! I do agree though that a 3" or even 2.5" tips would look perfect. I have a single 3" but I have a cutout in my bumper for it. I do think that the oval on my old Borla would look amazing!
 

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The 2 outlets look good but as noted the smaller diameter may be even better. One other thought - is your car intended to keep the stock look, ie the engine swap/turbo is unknown to the world... if so would it make more sense to keep the stock-look single exhaust outlet? My 2c is that I really like how you've kept the car low key / stock look, so the single exhaust fits better with that.
 

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Discussion Starter #287
Thanks gents! I'm a little torn, honestly. I do want to keep it stock looking, but I'm really liking the look of the dual exhaust effect. But, yes, a smaller pipe (or pipes) would probably look better scale-wise.
 

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Thanks gents! I'm a little torn, honestly. I do want to keep it stock looking, but I'm really liking the look of the dual exhaust effect. But, yes, a smaller pipe (or pipes) would probably look better scale-wise.
Just going to dual tips wouldn't be enough to make anyone suspect what you've done. There are people that do the same thing on a stock vehicle. I would keep the smaller dual tips but just go smaller round or oval.
 

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Discussion Starter #289
Better flowing exhaust

Wish me luck. I am going to attempt the installation of these parts myself. I picked up a few clamps and new bi-metal blades for my sawzall.



I ordered another tip the same as the one pictured in the event that I do decide to go with the 'dual' look.

 

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Discussion Starter #290
Exhaust Redo

Well, stainless steel is a b**ch to cut. I trashed 2 new sawzall blades and had to finish off with my hacksaw. Thankfully I cut the aluminized pipe to install the new inline muffler first with one of the new blades. This is not the 'funnest' job, but I should have great flow when done. It's sad that a Megan axleback had to be basically destroyed in the process, but it would have cost me much more for another trip to the exhaust shop to have another piece of pipe bent and installed.



New 'muffler' installed



Extension for tip



Tip installed...Joking...the pipe will be cut back so that the tip will just slightly protrude from under the bumper cover.

 

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Discussion Starter #291
Exhaust Update

The car is definitely louder than with the Meagan, but I'll test drive this afternoon to see what it's like. My AFR and boost gauges have arrived, so I hope to start installation on those tomorrow.

A bit of a hatchet job on the exhaust, but my budget isn't big enough for a full SS, mandrel bent and welded system. None of the clamps and such should be visible when the car is back on its wheels.







 

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Diehard Rams Fan
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Good job. So are you going to install dual tips? With the location on the tip I think that dual tips will look better. I'm curious to see oil you notice a difference while driving it.
 

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Discussion Starter #293
Good job. So are you going to install dual tips? With the location on the tip I think that dual tips will look better. I'm curious to see oil you notice a difference while driving it.
Not 100% sure yet on the dual tips. My exhaust work was a bit of a fail. Clamping SS to aluminized is a no-win situation. The tip got loose after driving a bit and the exhaust is too loud for my liking. It sounds fantastic outside but a bit too much in the cabin. So, back to the drawing board, ho hum.

On the upside, I hit 8 psi, so that's an improvement. It's very exciting driving the car, lol. It pulls really well but does confuse the auto a bit. Shifts can be quite firm but that may also have to do with my poly filled dogbone mount.
 

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Diehard Rams Fan
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Not 100% sure yet on the dual tips. My exhaust work was a bit of a fail. Clamping SS to aluminized is a no-win situation. The tip got loose after driving a bit and the exhaust is too loud for my liking. It sounds fantastic outside but a bit too much in the cabin. So, back to the drawing board, ho hum.

On the upside, I hit 8 psi, so that's an improvement. It's very exciting driving the car, lol. It pulls really well but does confuse the auto a bit. Shifts can be quite firm but that may also have to do with my poly filled dogbone mount.
The straight through glass pack that you used will be louder. I was curious to see what happened with that. Mine is very nice in the cabin even with my 3" exhaust and Magnaflow muffler.
 

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And stop thinking about it and do the dual tips. It looks amazing. :p
 

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Discussion Starter #296

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Discussion Starter #297
Short video clip of accelerating

Please excuse my old weathered hands. LOL! As mentioned in the video, I did not mash the throttle and I'm still a little timid with the car. But, it really pulls and highway driving is a blast. I actually have to let off the throttle when climbing hills. I was up to 140 km/h in a flash on a long hill. Once I get a little more comfortable with the car, I'll open it up a bit more and do another video.

I am going to get a muffler installed because it is too loud in the car. Actually, I would say it's just on the edge of being too loud.

 

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I couldn't believe what I saw today. A Yaris with dual exhaust tips!! I wish I could have been able to get a pic but I was going a different way right after I noticed it. They were crossing I-205 north from Oregon into Washington and had plates from BC. I couldn't believe it! And it looked great too.
 

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Discussion Starter #299
I couldn't believe what I saw today. A Yaris with dual exhaust tips!! I wish I could have been able to get a pic but I was going a different way right after I noticed it. They were crossing I-205 north from Oregon into Washington and had plates from BC. I couldn't believe it! And it looked great too.
Very cool! I've been looking more at the car and I really don't know how I could do dual tips, unless one was a dummy tip. I must have a muffler and the only place for one is behind the axle. The shortest muffler I can find to do the job is around 14". The second pipe would have to come out after the muffler and that would be too close to the back of the car to use my tips. I suppose I could buy shorter tips. It would require more investigation and probably a lot more money. Not ruling it out, however. I'm going to search online to see of anyone has done this.
 

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Very cool! I've been looking more at the car and I really don't know how I could do dual tips, unless one was a dummy tip. I must have a muffler and the only place for one is behind the axle. The shortest muffler I can find to do the job is around 14". The second pipe would have to come out after the muffler and that would be too close to the back of the car to use my tips. I suppose I could buy shorter tips. It would require more investigation and probably a lot more money. Not ruling it out, however. I'm going to search online to see of anyone has done this.
That's how I would do it. I would mount a dummy tip and just weld a piece of exhaust pipe the actual exhaust pipe so it looks like it's functional. Nobody would know and I couldn't tell if this was the case or not on the Yaris I saw. And it didn't matter because it looked great. :)
 
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