Single Turbo RX-7's Questions about all aspects of single turbo setups.

4" Complete Exhaust System Build

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Old 07-28-08 | 09:50 AM
  #26  
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sweet work man. heat sheilding the intake and the overall organization of the engine bay looks good. Can't wait to see the 4 inch exhaust bolted up.
Old 07-28-08 | 01:16 PM
  #27  
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BTW where and what is the shielding you use for the LIM next to the DP?
Old 07-28-08 | 02:38 PM
  #28  
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interesting how more and more are trying the 4" route. i will be going 4 inch as well but will be welding mine up myself as i wanted certain stipulations for it. as far as sound the only thing people have been doing is a straight through design muffler and a couple extra

resonators...sure that worked for my protege giving it a nice deep tone but with the results others have got from the straight through design i will be going a different route. it will be v-banded 409 stainless with the actual muffler a flowmaster 50HD series 4in dual 3 out. there will

be a couple removable resonator sections as well to play with but we will see after its on the car. i have all the piping muffler and resonators just tring to find time to do it unfortunatlly once completed i will make my own thread with pics and vid/sound. good luck with it get some

video sound clips posted when done.


i like how that second pic is of the welds on the magnaflow muffler factory welds not thiers.....oh well

z
Old 07-28-08 | 03:55 PM
  #29  
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Originally Posted by twisted7
NO, 4 inches from the turbo back.
well in that case im all for it, i want one!!!
Old 07-28-08 | 04:37 PM
  #30  
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Originally Posted by howard coleman
hello noise.

rotaries make, uh, alot more noise than an evo.

you will love it for five minutes.
And im going to love that comment for the rest of my life.

actually LOLLED
Old 07-28-08 | 05:34 PM
  #31  
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9 inch deep core holy crap.
I remember seeing someone (rotary extreme?) making a 4" exhaust before. It was coated black and had dual tip.
It would be sweet if you can make one similar.
Old 07-28-08 | 11:21 PM
  #32  
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The engineer explained to be that I will see significant gains in power with the 4" system over the 3"

Last edited by JEROME; 07-28-08 at 11:27 PM.
Old 07-28-08 | 11:45 PM
  #33  
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This 9" thick intercooler core that I'm running has been mocked and scorned for the past 8 years since I've owned the car. I will tell you this, each of the core's tube and fin are in graduating sizes. This thing runs cooler than any ebay special out there. Yes it runs well. The jig would be something I would do when I'm finished. I would offer it not to get rich, but to help the rx7 community. I'm not on this forum as a vendor because I have no intrest in selling parts. I'm simply here to share my experiences and spare others from wasting there time and money. If anyone can benifit from my errors, then that enough payment.

Originally Posted by mono4lamar
I knew it was going to be one of those strange deep cores. I forget who did the testing but they concluded that any core longer than 18" doesn't yield much more heat exchange. They also found that cores thicker than 3.5" was the same story. I'm not sure if they figured any figures with multiple cores but I'm sure that will make a difference.

Also, in reference to the "jig" to be made. Every turbo kit is going to need to have a different downpipe route. Unless you're going to market these for the factory twins I see easy fitment issues.
Old 07-28-08 | 11:52 PM
  #34  
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i got a question , is there a certain amount of boost or hp to see a gain in hp from a 4inch system over a 3inch ? because couldnt you over do it if you didnt have a large amount of hp
Old 07-28-08 | 11:55 PM
  #35  
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Thank for the support. The heat shield is something that I made for sheet aluminum the attached wit DEI Reflect-A-Cool matting. I ended up going crazy with this stuff. I did the entire trasmission tunnel and firewall because I did not want to shake and bake.







Originally Posted by Azcamel
BTW where and what is the shielding you use for the LIM next to the DP?
Old 07-29-08 | 12:02 AM
  #36  
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My turbo setup uses a 1.15 back housing, so 4.0" is what the engineer calculated will give the best result. I've run the 3.0" system before and I'm ready to step up to the next level. I will have tons of photos to share with everyone. Boost is not the end all. My current tubo flows more volume of air at lower boost than my previous T66 BB P-Trim Turbonetics Turbo with the .85 AR on the exhaust housing did at higher boost. My goal is to move as much volume of air as possible and not be hell bent of big boost numbers.

Originally Posted by xCxHxRxIxSx
i got a question , is there a certain amount of boost or hp to see a gain in hp from a 4inch system over a 3inch ? because couldnt you over do it if you didnt have a large amount of hp

Last edited by JEROME; 07-29-08 at 12:15 AM.
Old 07-29-08 | 12:04 AM
  #37  
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very cool man . cant wait to see how it comes out !
Old 08-09-08 | 12:23 AM
  #38  
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Thank you to all for the reading my post. On Saterday 08/09/08 @10 am the build of 1 mean 4" exhaust system will start. Please stand by. I will start with a layout of all the raw materials.
Old 08-09-08 | 03:39 AM
  #39  
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Hey Jerome, it would be a good Idea if you made this downpipe back, so that way anybody can purchase it and just make their own custom downpipe to mate with it. Basically it will start at the midpipe back...
Old 08-09-08 | 07:43 PM
  #40  
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I will start directly after the downpipe with a V-ban clamp. It's gonna be some sick werke.
Old 08-09-08 | 07:46 PM
  #41  
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Perfect, can't wait to see the outcome
Old 08-09-08 | 09:17 PM
  #42  
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Here is the my FD on the way to the engineering facility for some exhaust werke.

Last edited by JEROME; 08-09-08 at 09:41 PM.
Old 08-11-08 | 08:27 AM
  #43  
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99spec or DIY style taillights would set off that rear end nicely
Old 08-11-08 | 10:39 AM
  #44  
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I'm in the process of finishing off my 4" exhaust too. Can't wait to see what it looks like when you finish.

Best 'o luck.
Old 08-11-08 | 05:46 PM
  #45  
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I saw some led style lights on ebay but was not sure of the fitment. What's your opinion. I was thinking of using a some kind of film to tint the lense a darker shade.


Originally Posted by Azcamel
99spec or DIY style taillights would set off that rear end nicely
Old 08-11-08 | 08:06 PM
  #46  
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lol.. i was thinking about buying a cheap set to do it to.. i use spray tint that hobby town usa has, i use it all the time on different cars, here is how it looks on my bmw, should look good on that to. you can make the tint almost pitch black if you spary enough coats and still not loose much lighting, probably nothing with leds.
Old 08-11-08 | 10:26 PM
  #47  
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Wow! I thought I was the only one who owns a bmw m3 and a fd3s. That looks like a great idea. I need to inform the board that TRUST exhaust systems are not 100% 85mm like they claim. I have proof and will upload it all for the world to see. Yes, they make a nice exhaust system, but it is choaking the turbo more than I ever thought. No more deception, the truth shall set my turbo FREE.
Old 08-12-08 | 12:11 AM
  #48  
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Here is the proof the your greddy system is really not 85mm like they claim.









Please note how is conces down to 60mm.
Old 08-12-08 | 12:16 AM
  #49  
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And now for the moment that we all been waiting for. The engineer stated with the downpipe tonight. The weld are the best I've ever seen on four wheels. Only thing that comes close is my friends racing plane. See for yourself.







Old 08-13-08 | 02:00 AM
  #50  
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Downpipe Complete.
The wait is over. The downpipe looks so darn nice that it's a shame that I have to install it on the car, it should be hanging on my living room wall. The fitment is over the top. This thing has great welds and no cheating of any radius.





Last edited by JEROME; 08-13-08 at 02:16 AM.



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