Nismo 370z and 370z exhaust difference information
2 Attachment(s)
One of my teammates stumbled upon some diagrams, and I thought I'd post them here, as I think it's really interesting information. These diagrams are the exhaust differences between the regular and the Nismo 370z:
Regular: Attachment 424297 Nismo: Attachment 424298 I found it quite interesting that on the Nismo 370 they decided to go with a true dual system. I'm curious now how much less restrictive this exhaust is as compared to the regular 370z. -Colin |
If they gained 18 crank HP i guess its a good bit less restrictive. I was just thinking this to myself today, nice find.
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Cool diagrams. Thanks for posting. I'm curious as to why they used a H-pipe rather than an x-pipe.
It's a bit presumptuous, but from early tests of the nismo 370Z, I think there may be some speculation of whether the exhaust and tune adds much power. Other exhausts, such as stillen may offer more hp gains. |
where did you find these diagrams?
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i wonder if custom H pipe on the regular, will work or gain the same HP as the nismo.
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Nice info, thanks for posting..
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Originally Posted by 0jiggy0
(Post 7475652)
If they gained 18 crank HP i guess its a good bit less restrictive. I was just thinking this to myself today, nice find.
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I don't know much about exhausts but the loop that occurs in the muffler portion of the regular 370z, also looks very restrictive. Is that done just for sound; like to bring down the disciples?
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OP: Did someone actually cut open the exhaust to see what is inside? The OE system path seems a little simplified. The paths you show do not take advantage of the full muffler volume.
I used to work for Tenneco Inc who supplies OE exhaust to the big 3 and the Jap 3. Just before I left, we were working on a project with Futaba in Japan for Nissan Z. I recognize this design from prototype samples we had in the pole barn. (At that time, I was an engineer designing systems for Toyota) I haven't looked closely at the 370Z system, but if the tailpipes are not directly across from each other (one pipe exits the center of the muffler end cap and the other exits offset from center), then it is safe to say the exhaust paths cross the muffler. Right side exits the left tailpipe and vice versa. See if you can get photos of the OE system and I will be able to tell. If I had drawings or photos of the inside of the muffler, I could tell the design philosophy and restriction points. |
I was given the information by the founder of *******.com, who has many contacts in the Nissan industry.
Originally Posted by Phreakdout
(Post 7479201)
OP: Did someone actually cut open the exhaust to see what is inside? The OE system path seems a little simplified. The paths you show do not take advantage of the full muffler volume.
I used to work for Tenneco Inc who supplies OE exhaust to the big 3 and the Jap 3. Just before I left, we were working on a project with Futaba in Japan for Nissan Z. I recognize this design from prototype samples we had in the pole barn. (At that time, I was an engineer designing systems for Toyota) I haven't looked closely at the 370Z system, but if the tailpipes are not directly across from each other (one pipe exits the center of the muffler end cap and the other exits offset from center), then it is safe to say the exhaust paths cross the muffler. Right side exits the left tailpipe and vice versa. See if you can get photos of the OE system and I will be able to tell. If I had drawings or photos of the inside of the muffler, I could tell the design philosophy and restriction points. I'm not exactly sure as to how the people went about creating the exhaust flow characteristics for these diagrams. It would be pretty awesome to get your analysis on any kind of exhaust. I feel like I won't be able to source pictures of a cut up exhaust though. I will definitely post up pictures if I do come across any. Thanks for the input everyone! -Colin |
H pipe instead of a Y pipe? I could do that myself.
Also, no cats please. |
Originally Posted by Phreakdout
(Post 7479201)
OP: Did someone actually cut open the exhaust to see what is inside? The OE system path seems a little simplified. The paths you show do not take advantage of the full muffler volume.
I used to work for Tenneco Inc who supplies OE exhaust to the big 3 and the Jap 3. Just before I left, we were working on a project with Futaba in Japan for Nissan Z. I recognize this design from prototype samples we had in the pole barn. (At that time, I was an engineer designing systems for Toyota) I haven't looked closely at the 370Z system, but if the tailpipes are not directly across from each other (one pipe exits the center of the muffler end cap and the other exits offset from center), then it is safe to say the exhaust paths cross the muffler. Right side exits the left tailpipe and vice versa. See if you can get photos of the OE system and I will be able to tell. If I had drawings or photos of the inside of the muffler, I could tell the design philosophy and restriction points. TK |
Originally Posted by Ilike350Z
(Post 7476232)
i wonder if custom H pipe on the regular, will work or gain the same HP as the nismo.
TK |
What are the advantages if any to changing from a normal system to a cat back system?
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Originally Posted by kambel smith
(Post 10983599)
what are the advantages if any to changing from a normal system to a cat back system?
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Originally Posted by Kambel Smith
(Post 10983599)
What are the advantages if any to changing from a normal system to a cat back system?
The same answer applies to Z33. Doing a low restriction catback on any Z doesn't net a lot of power. We're talking very little noticeable gains unless you match the exhaust with some intake modifications AND do/get a re-map of the ECM (tune) on the dyno. Sound, on the other hand, is what most swap their exhausts for. |
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