Fancy Tech: How to Get Rid of Exhaust Drone, works great!

ka8 · 12-25-2011, 11:48 PM

Hello! Not to hijack a thread but...I searched google to fix drone in my Z32TT and somehow found this thread.

My setup is 3'' dp and 3''->2.5'' tp with 2.5'' Greddy SP exhaust. My butt-dyno is saying I gained about 30whp but I do have annoying drone at 2300rpm-2900rpm lol. I have to speed up to 75+ mph to quiet down drone.

Since exhaust diameter is different which diameter should I use for my setup? 2.5'' or 3''? Based on what I've read 28-30'' capped pipe sounds about right? Thanks in advance!

'10Anamoly · 12-26-2011, 02:18 PM

29" Capped tubes (one per side) at 2.5" each. The pipes need to mate to the exhaust at a 90 degree angle but the bends afterwards dont matter as long as the length and diameter are right.

'10Anamoly · 12-29-2011, 06:44 PM

Lemme know if that worked for you bud.

ka8 · 12-30-2011, 07:58 PM

Quote:

Originally Posted by '10Anamoly

Lemme know if that worked for you bud.

Just got this done today. But I was only able to squeeze in 20'' of piping because as you probably know already nothing's easy with Z32's. Well I thought I was going to go back to muffler shop but no need to. About 90% of drone is gone at cruising speeds. Just curious now is there any performance loss with this? I don't mind sacrificing 2-3whp for quiet cabin.

Here's my progress for reference.

https://www.300zxclub.com/showthread.php?t=202092

Thanks for your help.

'10Anamoly · 12-31-2011, 07:13 AM

Glad it helps! I am surprised that 20" helped but thats definately cool.

12-25-2011, 11:48 PM	#1 (permalink)
ka8 Base Member Join Date: Dec 2011 Location: SOCAL Posts: 2 Drives: Z32TT Rep Power: 15	Hello! Not to hijack a thread but...I searched google to fix drone in my Z32TT and somehow found this thread. My setup is 3'' dp and 3''->2.5'' tp with 2.5'' Greddy SP exhaust. My butt-dyno is saying I gained about 30whp but I do have annoying drone at 2300rpm-2900rpm lol. I have to speed up to 75+ mph to quiet down drone. Since exhaust diameter is different which diameter should I use for my setup? 2.5'' or 3''? Based on what I've read 28-30'' capped pipe sounds about right? Thanks in advance! Jorbes13 likes this.

12-26-2011, 02:18 PM	#2 (permalink)
'10Anamoly Track Member Join Date: May 2010 Location: GA Posts: 882 Drives: 2010 370Z BS M6 Rep Power: 18	29" Capped tubes (one per side) at 2.5" each. The pipes need to mate to the exhaust at a 90 degree angle but the bends afterwards dont matter as long as the length and diameter are right. __________________ 2013 Ford Mustang GT 374rwhp, 360rwtq SAE / GT500 Axle-Backs / Brembo Pack / Track Pack / Recaros / 6spd

12-29-2011, 06:44 PM	#3 (permalink)
'10Anamoly Track Member Join Date: May 2010 Location: GA Posts: 882 Drives: 2010 370Z BS M6 Rep Power: 18	Lemme know if that worked for you bud. __________________ 2013 Ford Mustang GT 374rwhp, 360rwtq SAE / GT500 Axle-Backs / Brembo Pack / Track Pack / Recaros / 6spd

12-31-2011, 07:13 AM	#5 (permalink)
'10Anamoly Track Member Join Date: May 2010 Location: GA Posts: 882 Drives: 2010 370Z BS M6 Rep Power: 18	Glad it helps! I am surprised that 20" helped but thats definately cool. __________________ 2013 Ford Mustang GT 374rwhp, 360rwtq SAE / GT500 Axle-Backs / Brembo Pack / Track Pack / Recaros / 6spd

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