Nissan 370Z Forum

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-   Intake/Exhaust (http://www.the370z.com/intake-exhaust/)
-   -   Tomei exhaust issues (http://www.the370z.com/intake-exhaust/94091-tomei-exhaust-issues.html)

Japanjay 07-22-2014 07:08 PM

Z1 runs it on their race car BTW. It is race proven I guess you can say. I am going to be contacting them again about getting some pictures of the mini skid plate they fabbed up for the bottom of the can so I can duplicate it.

abm89 07-22-2014 07:13 PM

Quote:

Originally Posted by martin82 (Post 2904912)
shoot this exhaust hangs way too low for the track and sticks too much past the bumper.......

Interesting since they claim to never scrape theirs....

Also that's an expected result of installing an exhaust designed for the Z33.

SlowZ 07-22-2014 07:29 PM

Without the bar my Z feels way too soft like it has a lot of body roll in the rear. I'm having someone notch into mine to see if I can get it to clear. If not then I'll just have a custom bar made or something. My budy offered to hook me up with like 100ft of titanium exhaust wrap, idk if it's worth it or if any of you guys would do it to your exhaust

37zeroZ 07-22-2014 10:56 PM

Now I know what the silliest looking exhaust looks like.

aszyd 07-23-2014 08:18 AM

Quote:

Originally Posted by 37zeroZ (Post 2905087)
Now I know what the silliest looking exhaust looks like.

To me, it's awesome! I grew up lusting over cars with big, single side cans, like the Supra. So having one on my Z takes me back. If there was an easy way to cover or fill the right cutout, I would do it, but no one seems to make a rear lip in that style.

abm89 07-23-2014 08:24 AM

Weight savings and good build quality.... I give zero f***s

SlowZ 07-23-2014 11:46 AM

Anyone have any input on the wrap?

abm89 07-23-2014 02:21 PM

Quote:

Originally Posted by SlowZ (Post 2905572)
Anyone have any input on the wrap?

I'm not using it. I personally don't think it matters.

SlowZ 07-23-2014 05:37 PM

I would be able to wrap the entire exhaust, test pipes back, with DEI wrap for $50 so that's why I was thinking of doing it. Just to keep it looking good and stuff and to prevent any scratches or dents that could occur while driving

Japanjay 07-23-2014 05:41 PM

I wouldn't, will hold water.

aszyd 07-27-2014 06:44 PM

I'm going to be swapping my Y over to the Motodyne XYZ pipe to see if I can quiet things down a little, and remove that rasp. I'm going to try the resonator first, then if that does not muffle the sound enough, the HFC.

The parking garage security guy at my office is starting to complain. Getting kicked out of the garage is not something I would like to have happen.

I was thinking about picking up the Amuse resonated Y, during the Bulletproof Auto sale, but damn, that thing will cost $1500.

Japanjay 07-27-2014 07:03 PM

You could get the XYZ and arts. There is a guy in my club with a 350z that has the Tomie, but is running the XYZ with standard cats and it is much tamer than tests with the tomie y and y back.

abm89 07-27-2014 07:04 PM

I'm running resonated test pipes without the Tomei Y pipe and it's usable under 3k RPM

Japanjay 07-27-2014 07:09 PM

Oh, another note, I blew the 02 bung on the passenger side off running some bikes. Grabbed third and it sounded like a u-joint broke and the drive shaft started flopping in the tunnel. Freaked out and instantly pulled off the road on the shoulder. Looked under and the 02 was hanging and smacking the ground causing it flip up and hit the undercarriage. Will be calling Z1 tomorrow about getting a new one to me by Thursday, going in for tune on Friday. We think that since I was only a few miles from the house and the engine was up to temp, the defouler and sensor was still cold and when I super heated the test pipe the metal expanded really fast and popped the Bung weld.

aszyd 07-27-2014 07:23 PM

I have FI LTHs, so my only option, without going back to stock headers, is a resonated / catalyst Y pipe. I only need to kill the DBs a little. If I did go back to the stock headers, I would just reinstall the set of HFCs that I was running on my first aftermarket setup.

Eclipz 07-27-2014 08:46 PM

Everyone should post a video of their setups with the Tomei :tup: we've already seen japanjay's curious to see how the rest of your setups compare.

abm89 07-27-2014 08:48 PM

Quote:

Originally Posted by Eclipz (Post 2910426)
Everyone should post a video of their setups with the Tomei :tup: we've already seen japanjay's curious to see how the rest of your setups compare.

I'll have something next weekend after my track day.

Though, videos don't accurately represent how many decibels are coming from the system.

mag_black 07-27-2014 10:34 PM

Fitment just doesn't look right. Although, they do look nice on the nismo bumpers.

Japanjay 07-27-2014 10:37 PM

Quote:

Originally Posted by abm89 (Post 2910428)
I'll have something next weekend after my track day.

Though, videos don't accurately represent how many decibels are coming from the system.

You are so right, video doesn't provide the audio needed. Must hear in person.

SlowZ 07-28-2014 01:18 AM

I'll try to get a WOT flyby video 1st-5th soon.

Eclipz 07-28-2014 09:20 AM

There is maybe 1 or 2 370z where I live, and they dont have tomei, so video is all I have :( but I agree audio from a camera is not the same as hearing in person

Japanjay 07-28-2014 09:49 PM

I dyno/tune this Friday. Will definetly be getting full video.

SlowZ 07-28-2014 10:25 PM

I need some more help. I was wondering if I could trade my non bent bar for one that is bent. I work from when the sun comes up till the sun comes down and I cannot find a shop that's open in my area that can bend the bar. Let me know of anyone is willing to trade. I'll pay shipping/whatever it costs to get bent

abm89 07-29-2014 05:40 PM

I don't think that's going to be easy to find.

Do none of the shops have a hydraulic press?

Japanjay 07-30-2014 06:44 PM

http://i123.photobucket.com/albums/o...pse965a621.jpg

Eclipz 07-30-2014 09:45 PM

you love cops?

Japanjay 07-30-2014 09:59 PM

Top of the frame says " Designated Doughnut Delivery Vehicle". Goes well with that exhaust in a state that doesn't allow modified exhausts.

aszyd 07-31-2014 09:50 PM

Initial review of the Motordyne Resonated XYZ. Totally worth it! I would say that I am 80% happy with the results.

The nasty sound on decel is gone, rather than a raspy can of bees, its a nice hum. Want it loud? Floor it, the exhaust still screams at full tilt. It's no longer obnoxious when driving calmly. The SRM blips don't shake the earth like they used to. I say 80% because that's a good estimation about how much it has cleaned up the sound. It can still get raspy above 4K, when driving with spirit.

I still haven't heard it from a cold start, another pain point with the Tomei setup, but I have high hopes. I'm also looking forward to see how the sound will change after a few heat cycles, once the resonator adjusts.

EDIT: I should add that there were no fitment issues connecting to the FI LTHs and the Y-Back section of the Tomei. Also, the 2.5" gaskets included with the Tomei are crap. It was my intention to reuse them, but they crumbled as soon as I removed the bolts. The 3" gasket held up fine.

Masterbeatty 08-01-2014 08:48 AM

Quote:

Originally Posted by Japanjay (Post 2914220)
Top of the frame says " Designated Doughnut Delivery Vehicle". Goes well with that exhaust in a state that doesn't allow modified exhausts.

I dissliked the kitsap county cops. The first day i moved to silverdale i got a speeding ticket for 5 over at the exact location of a speed limit change. I also got cited for having out of state plates too that i had to contest since i had not lived there for > 30 days. WA cops are pretty disgruntled individules.

Japanjay 08-01-2014 07:27 PM

316 whp and 249wtq @ 7.7k rpm. Was 318whp at 8k, but I didn't feel comfortable leaving the redline that high so I had him knock it back to 7.7k. I factory baselined at 273. Gen3 CAI / Z1 test pipes / Tomie y-pipe / Tomie y-back. Will have a video up on youtube of the dyno run. This was on a DynoJet.

Japanjay 08-01-2014 08:35 PM

http://www.youtube.com/watch?v=C3fKwzeu7pI

I also took a dB meter with me just out of curiosity, I measured my friends 350z with test pipes and injen exhaust, he hit 106dB from about 20' away. I measured mine the same way and at ~4k rpm I went over 130dB and I turned away and ran back. For almost an hour my left ear hurt like a bastard since that was the one that turned into it as I turned around really quickly. Lol Even the tuner was' "that is a loud exhaust, um yeah, increadibly loud". After the first pull he grabbed ear muffs off the wall.

aszyd 08-02-2014 02:10 AM

322 / 260 for me! Z1 Dynojet. The general consensus from the Z1 crew was that my car is as loud as their race car... When John was doing the pulls, I could feel the exhaust rumble in my chest from about 15' away. I have a quickie cell phone video of one of the pulls, but they also shot a video as well. Once it is posted online, I will post it on the forums.

abm89 08-03-2014 09:26 PM

Here's some video from MSR Houston This weekend:

http://www.youtube.com/watch?v=5DJXQLFkzeA

aszyd 08-03-2014 10:39 PM

Nice vid! Really highlights the "expreme" sound. Also, what was with the wing on that other 370? Way too big. Although, it did look like it was pulling on you pretty hard, supercharger?

abm89 08-03-2014 10:49 PM

Quote:

Originally Posted by aszyd (Post 2918258)
Nice vid! Really highlights the "expreme" sound. Also, what was with the wing on that other 370? Way too big. Although, it did look like it was pulling on you pretty hard, supercharger?

No supercharger, but this is a novice session. It's more for learning than actually trying to race someone.

Also, my friend got a pretty good deal on that wing/hatch combo. It works for what he uses the car for.

2sl0w 08-05-2014 12:23 PM

Quote:

Originally Posted by aszyd (Post 2916739)
322 / 260 for me! Z1 Dynojet. The general consensus from the Z1 crew was that my car is as loud as their race car... When John was doing the pulls, I could feel the exhaust rumble in my chest from about 15' away. I have a quickie cell phone video of one of the pulls, but they also shot a video as well. Once it is posted online, I will post it on the forums.

Jon was telling me about you when I was up there over the weekend. I have ART pipes and motordyne z370 w/ stock headers. It is LOUD when it needs to be... and he said your setup was twice as loud lol.

I have to hear that one day. Are you coming to znats?

iceman21_23 08-06-2014 12:29 AM

Quote:

Originally Posted by aszyd (Post 2918258)
Nice vid! Really highlights the "expreme" sound. Also, what was with the wing on that other 370? Way too big. Although, it did look like it was pulling on you pretty hard, supercharger?

How is the wing too big? Lol anyways no, intakes tp exhaust and tune is all ive got. no supercharger. Thank you though :)

aszyd 08-06-2014 06:02 AM

You're actually on a track, where you would benefit from a wing like that, so I can't hate on it too much. I guess I'll say that it's too big for me. From a style standpoint, not functionality, it is too high and sticks out from the sides of the car too much. Looks like a big shelf. Again, I understand that it's purpose is not to look good, but to be functional.

aszyd 10-19-2014 12:29 AM

1 Attachment(s)
Time for an update!

The noise got the best of me. My car was just way too loud for a DD. I would get negative comments every day from people at work. So I made a change and added a Dynomax VT muffler between the FI LTH and Tomei mid pipe.

I don't have any pics, but I was able to combine the two 2.5" pipes from the Tomei with the Dynomax 17964 muffler and sandwich it all in there. It took some muscle to get it all lined up, but I eventually got it all bolted together. I'm sure a proper exhaust shop could do a better job, if they cut it up a bit and welded some flanges on. I've gotta pick up some exhaust tape to seal up the connection points, aka leaks.

The sound is completely different than what I was used to with the Tomei. Gone is the high pitched "chainsaw". It has been replaced with a low rumble. During normal driving, it's a little louder than the stock exhaust, IMO, with almost no drone. Spirited driving brings out the sound a little more, since the valve opens and it changes to a more straight through design, but it's still quiet in comparison.

Hopefully this will be the last time I make any major modifications to the exhaust.

http://www.the370z.com/attachment.ph...1&d=1413696548

abm89 10-19-2014 09:33 AM

You gave in. Didn't you have the motordyne xyz with the resonator?


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