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12-05-2012, 12:03 AM | #109 |
1NZ-6spd
Drives: '05 6-Spd Vitz RS Join Date: Oct 2008
Location: Oshawa, Ontario, Canada
Posts: 2,967
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What we're all trying to get at is that we hope it works, but would hate to see it crack because of how you designed it without any flex in it.
On that note have you considered the use of spring clamped slip joints? Laminar flow but will allow the pipes to move should they need to. |
12-05-2012, 12:46 AM | #110 | |
0-60 in slow
Drives: light blue liftback Join Date: Aug 2009
Location: so cal
Posts: 926
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Quote:
My comment about the flex joint is that the bellows cause friction in fluid flow which causes turbulence which reduces flow. For that alone I wouldn't want to run them in my primaries where any slowing of gas flow can have drastic consequences. I've done the math, run the simulations and calculated the load and stress points. I'm very confident in my design that I don't feel its going to suffer a fatigue failure. |
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12-05-2012, 01:21 AM | #111 | |
play every day
Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012
Location: Los Angeles
Posts: 1,961
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Quote:
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12-05-2012, 09:29 AM | #112 | |
1NZ-6spd
Drives: '05 6-Spd Vitz RS Join Date: Oct 2008
Location: Oshawa, Ontario, Canada
Posts: 2,967
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Quote:
This is a Slip Joint. |
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12-05-2012, 11:08 AM | #113 |
0-60 in slow
Drives: light blue liftback Join Date: Aug 2009
Location: so cal
Posts: 926
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I skipped over that point as I assumed you thought slip joints are a way to control exhaust flex.
Yes I did consider a slip joint originally as a way to join the 2 sections of pipe but chose against it for various reasons. The biggest reason I chose against it was that slip joints are weak. In my situation there is still load traveling through the second set of pipe even though there is minimal engine movement in the exhaust its still carrying the load from the 30 lbs of exhaust and that load is effectively being distributed through only one of the pipes which doesn't have a ton of bearing area. If I was mounting the second section of pipe lower down I would probably go to a slip joint, it wasn't appropriate in my situation. |
12-05-2012, 11:16 AM | #114 |
play every day
Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012
Location: Los Angeles
Posts: 1,961
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Would one of these help?
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12-05-2012, 11:38 AM | #115 |
0-60 in slow
Drives: light blue liftback Join Date: Aug 2009
Location: so cal
Posts: 926
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I don't know maybe. I prefer to stiffen the dogbone rather than add weight somewhere else.
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12-05-2012, 11:43 AM | #116 |
Drives: 2015 H Production Yaris Join Date: Oct 2009
Location: Debary, FL
Posts: 1,953
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I think some of you guys are loosing focus on the big picture... Build a prototype, get it on the car and see if it makes power. If needed issues like a flex joint, ball joint or the engine support can be addressed when a production piece is made.
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12-05-2012, 11:44 AM | #117 |
ULTIMATE
Drives: 07 Yaris Turbo Join Date: May 2007
Location: Canoga Park, CA
Posts: 14,859
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^ +1.
The TRD Trans mount is stiffer and does more to control engine movement than the NITTO torque damper (which does work, just to a lesser degree).
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Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific. |
12-05-2012, 12:08 PM | #118 |
is this going to delete the cat and O2 sensor or just relocate it farther down the path? sorry, I am a latecomer.
I do like the idea of the longtube header. can't wait to see the finished product and dyno sheet. |
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12-05-2012, 12:56 PM | #119 |
0-60 in slow
Drives: light blue liftback Join Date: Aug 2009
Location: so cal
Posts: 926
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+2^ Jason
Cali do you know the durometer of the rubber used in the TRD mount? The rules require I run a catalyst so I will have to keep that. I will be modifying my existing race mid-pipe for this exhaust system so it will accept the new collector location, but I will likely have to redesign that as there is an issue with length. The mid pipe is actually one of the bigger issues I'm still battling, there's a problem unique to this engine design that create a really bad off throttle drone. The rear o2 will be kept since there isn't a reason to remove it, I may just weld a new bung onto the rear of the cat or use an CEL eliminator I'll probably try both and see which one is easier to keep in the long run. |
12-05-2012, 02:22 PM | #120 | |
ULTIMATE
Drives: 07 Yaris Turbo Join Date: May 2007
Location: Canoga Park, CA
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Quote:
I have the TRD engine mounts + trans mount and my motor doesn't move much at all any more. Nice and loud in the cabin too.
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Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific. |
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12-05-2012, 08:04 PM | #121 | |
Drives: 2005 Toyota Echo Join Date: Aug 2010
Location: Brampton, ON
Posts: 505
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Quote:
The car is loud and whole car vibrates
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12-07-2012, 12:06 AM | #122 |
0-60 in slow
Drives: light blue liftback Join Date: Aug 2009
Location: so cal
Posts: 926
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well no pictures but everything has been tacked together...the secondaries were way more difficult than I was expecting. All that's left is to burn everything together and my header will be done.
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12-07-2012, 11:17 PM | #123 |
0-60 in slow
Drives: light blue liftback Join Date: Aug 2009
Location: so cal
Posts: 926
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Well its finally finished. I'll post a video our something later tonight.
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12-08-2012, 01:12 AM | #124 |
0-60 in slow
Drives: light blue liftback Join Date: Aug 2009
Location: so cal
Posts: 926
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All I'm going to say is I'm glad i did this the seat of the pants feeling is intense
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12-08-2012, 01:23 AM | #125 |
1NZ-6spd
Drives: '05 6-Spd Vitz RS Join Date: Oct 2008
Location: Oshawa, Ontario, Canada
Posts: 2,967
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Can't wait to see it in action!!! First one!
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12-08-2012, 01:29 AM | #126 |
play every day
Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012
Location: Los Angeles
Posts: 1,961
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