Nismo exhaust vs Stillen | FI | and everything else...

JLarson · 11-07-2019, 01:00 PM

Quote:

Originally Posted by BossJ

I'm sure this question has been beat to death - I've looked on google and tried searching the forums. I couldn't find anything...

Does anyone know what the HP / torque gain is - when it comes down to putting a stillen CBE on a NISMO... I'm guessing what they say on their website is for the stock exhaust?

I don't want loud and drony. I know... any aftermarket CBE will give you more noise - it's the animal - BUT i hear stillen is a pretty good sound + not loud...

I'm just curious if it's even worth my money or if I should just go HFC + Muffler delete - (I know loud - but I want the performance)

...

Thank you! (I asked something similar to this in another thread) but I am really curious about the difference in performance gained. (I've been seeing like a 10hp gain over nismo - is that about right?)

-
also - if it is only a 10hp gain from Nismo exhaust and i'm not too concerned about sound - what if I just went this route (minus straight pipes I would go HFC) - https://www.z1motorsports.com/z1-pro...ge-p-7223.html

Addressing your last question first - the 400hp package from Z1 is nice, and it'll get you gains you can feel, but it'll also include Headers which will (trust me on this) get a LOT louder.

If you're trying to stay relatively quiet, the HKS/Stillen/and even Fast Intentions with stock cats will keep you fairly quiet, and paired with long tube intakes and a tune you'll see decent gains. Remove those cats, and expect a big dB boost.

https://docs.google.com/spreadsheets...54705979746117

I collected dyno results from a ton of cars and setups a while back, you may find that list helpful. Just keep in mind that no 2 dynos read quite the same, and things like STD vs SAE have a big impact on reported WHP. If you have questions on the data, let me know.

JLarson · 11-11-2019, 08:47 AM

I just checked today using a small dB tester, and my cabin is about 82-84 dB @ 80 mph, just over 3k rpms, with LTH and CBE.

I know people have asked that question in the past. Please note I do have sound deadening in my trunk, which definitely has an impact.

I'll do some more tests including going through the rev range, but I'll need a passenger to hold the tester and record results.

BossJ · 11-11-2019, 09:03 AM

Quote:

Originally Posted by JLarson

I just checked today using a small dB tester, and my cabin is about 82-84 dB @ 80 mph, just over 3k rpms, with LTH and CBE.

I know people have asked that question in the past. Please note I do have sound deadening in my trunk, which definitely has an impact.

I'll do some more tests including going through the rev range, but I'll need a passenger to hold the tester and record results.

Do you have any information you can share on the sound proofing the trunk?

I may want to do that! Ha!

I ended up getting the greddy gt exhaust - (admintuning suggested this - he'll be tuning my nismo once I finish with the parts)

11-11-2019, 08:47 AM	#2 (permalink)
JLarson A True Z Fanatic Join Date: Jun 2017 Location: Media, PA Posts: 4,079 Drives: 14 Nissan 370z MR M6 Rep Power: 2684371	I just checked today using a small dB tester, and my cabin is about 82-84 dB @ 80 mph, just over 3k rpms, with LTH and CBE. I know people have asked that question in the past. Please note I do have sound deadening in my trunk, which definitely has an impact. I'll do some more tests including going through the rev range, but I'll need a passenger to hold the tester and record results. __________________ 2014 370z Touring Sport Magma Red MT // BP Single Turbo 6467 // 63mm TB's // Z1 Ported Upper Mani // RJM Pedal // Zspeed Stage 3 Clutch // 526 WHP, 451 WTQ 2006 350z (Sold) // 1990 300zx (Sold) // 1985 300zx 2+2 (Sold)

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