Nismo OEM exhaust compared to aftermarket...
 

How does the Nismo exhaust that comes on my car compare to other aftermarket exhaust performance & sound wise? My car is very throaty, just wondering if I should keep or not. I've ran straight pipes on everything over ever owned :D

The OEM Nismo is still very tame compared to other aftermarket systems. I had to upgrade even tho I tried several things with the Nimso (test pipes, HFC, and resonators removed) still couldn't achieve the tone I was looking for with the Nismo. Depends on what sound youre looking for ultimately

Agreed. Almost every aftermarket exhaust is going to be measurably, if not significantly louder than your OEM Nismo. I had the Nismo myself for a month or two before ditching it for the Stillen. I'm very glad I did...perhaps you should too. :tiphat:

Do either one of you guys have an exhaust clip? How loud is it? Im all about efficient performance as well, i dont see aftermaret exhaust giving much more than the Nismo, being that exhaust doesnt do much on a near stock vehicle anyway...

i read in the Nismo section a forum member actually measured the Nismo exhaust..its actually pretty good with 2.4in piping besides the H-pipe which bottle necked to 2.1...a good replacement H-pipe would most likely bring it close to most aftermarket setups..

Which is better the Nismo stock “H” or Nismo S tune “Y” ?

Craniac24, Just wondering looking at your mods, why no HFC?

Thanks,

Alex

I've been back and forth on whether or not to add an HFC, but I think that I'm pretty happy with the volume and tone of the intake/exhaust setup as is. For me, adding an HFC might make my car a little too loud for my taste.

Awesome I'll check that sound clip out when I get time, and this is just me guessing but an H pipe will even out exhaust pressures on a dual exhaust system, a Y pipe is cut down to a single pipe somewhere along the system, so id assume that the H pipe is gonna do ya better...I could be wrong, I don't know much about the Z's yet...

The problem, from what I could see, with the Nismo OEM Exhaust is the big-*** combined (not sure the word) muffler. Most of the aftermarket exhausts are either true-dual, or at least dual mufflers, which helps with power and sound quite a bit I'd imagine.

Most aftermarket exhausts add a ton of sound at much lower rpms than the Nismo as well.

Yeah i can see that, its kinda nice to have something half quiet for now though. My SRT-10 was straight dual 3" exhaust, high flo cats (300 cell), and longtube race headers, it would throw flames at 6K :D

i am running the nismo and couldn't be happier. The H pipe setup is very efficient and the piping diameter is comparable to aftermarket. I had the FI exhaust prior to this and the gains are similar as well.

your welcome. :tup:

I have the nismo exhaust with Berks HFC's. Im just not willing to spend over a grand for five or maybe a little more horsepower for a new cat back exhaust .As for myself I am considering a new X-pipe to replace the stock H-pipe. If the exhaust note after that is not to loud and obnoxious I might consider removing the resonators, but I doubt it. Please no more trucks with big four inch loud a$$ exhaust tips. It just dont spell cool at all!!!

Lol i had 4.5" tips on my SRT, and 5" tips on my 08 Tundra :D but they both sounded amazing :rolleyes:

These Berk HFC's (high flow cats?) everyone is talking about, do they give alot better throttle response? What kinda $ are we looking at?

Also (sorry for all the questions) how many cats do these cars come with?

there are two cats; one per header

in most exhaust layouts, the catalic converters are where a lot of back-pressure builds up due to the setup, hfcs free up that pressure and allow for a briskier throttle response, though often at the expense of some high-end power (loss of back-pressure in high rpms tends to lose hp, tho i'm not sure if thats the case with the Z)

High-flow cats give the most gains of all the bolt-ons.

It's not the case:

Run Details

Generally, without raming more air in, a less restrictive exhaust will often lose some low end power while picking up some high end power -- this is because optimal cylinder filling tends to happen higher in the rev range, at which point, smaller diameter piping or cats may be somewhat of a restriction.

However, at low speed, when there is less cylinder filling, those "restrictions" are closer to approximating optimal exhaust flow under those running conditions.

So... in short, extra exhaust flow is only helpful when/if you are sucking in enough air to take advantge of it.

In real life, you end up with some sort of compromise, and then tune around that.

yea sry for not being clear, thats what i was trying to get at.

from my experience on the G, most exhausts actually sacrificed some top end for more mid-range power. After I installed my fujitsubo legalis-r, i noticed there was a 2-3 hp drop at redline, but mid-range power was improved. I only had a z-tube and k&n drop in on that car to help with air intake

TP's, stock resonators, and muffler delete...let you know next week, but stock Nismo is weak...even with TP's...

you could notice a 2-3hp drop with your butt dyno? wow! sensitive equipment.

I wonder how it got that sensitive?! LOL!! :bowrofl: :bowrofl: :wtf2: Been drinking a few cold one's I couldn't resist!

I know the nismo isnt much louder than stock, but does the tone of the sound change inside the car? i like the stock sound a lot, but i love the sound of the nismo much more. If i got a nismo exhaust would the tone change be noticeable inside at all?

IMO, no, not really. A tad deeper and volume, but really not noticeable...that's why I took my rear section off... :D

I dunno mine is sounding pretty beast inside right now, very deep tone at mid to low rpms...im kinda liking it, just with it were a bit louder and more responsive. So so HFC's with my stock setup wont be too loud, and wont throw any codes? Thats my main concern holding me back...

I have the nismo exhuast with Berks HFC's now. It did not change the sound that much. It is just a little louder, but not a night and day difference by any means. I have never had any codes (CEL) or any problems. I highly recommend the hfc's. I just ordered longtube headers so my cats will be for sale as soon as they come in. $300.00 and they have less than 1,000 miles on them. :tup:

Hold them for me, I'll buy them when you get your headers on! Also, how much of a power difference did you feel with the HFC's?

With TP's at least, you will feel more of high mid to high range pull...

Thats cool, long as i can get a lil more deep throaty sound and enough power to feel a slight difference ill be happy. Im sure HFC's will provide slightly noticable increase throttle response as well. So the Berks HFC's are direct bolt on replacement?