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Crotchety Old Bastard
 
RarlyL8's Avatar
 
Join Date: Jan 2000
Location: Huntsville, AL
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Worst Drone I Have Ever Heard

Today I was finishing up on a custom 934WG/Center Dump Muffler combo for a client and spied one of my still-born projects on the shelf. All the tools were out, the chop saw was set up and the custom exhaust had to come back off my car, so I thought what the hell toss this thing on and give it a go.
The "thing" was a 4.5"ID 50 state legal OBD II aftermarket CAT.
I've wanted to put something together for those who need or would like the option to use a catalytic converter. My muffler systems are modular so this dude just plugs in where the muffler body would normally go.
Well I got it all cobbled together and fired it up. First impression was that is is very loud. A touch louder than my Hooligan muffler. Not good. Then I took it for a ride. Holymotherofgod this thing is obnoxious! I have never in my life heard such an ear piercing drone! It actually hurt my ears from 1500prm-3000rpm.
The stock muffler on the 930's with cats is heavily chambered and brother now I know why. Taming this beast is going to be a challenge.


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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 08-28-2010, 08:40 PM
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I have never changed out so many exhaust systems on one car than my 930. As soon as I finish one and hear it I want to do another. I love the manners of my current magnaflow but i'm always striving for a more "exotic" sound.
Old 08-29-2010, 11:27 AM
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Crotchety Old Bastard
 
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If you want an exotic sound try my headers. The equal length primaries and secondaries make a tuned sound that is very exotic for a turbo, I just love it. I know you like to build your own stuff so you should build a set of those. The power and sound worth the effort.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 08-29-2010, 04:40 PM
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Brian, trust me i've been back and forth a hundred times about ditching my B&B headers for a set of yours.

You have any audio clips?
Old 08-30-2010, 09:56 AM
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Crotchety Old Bastard
 
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I have not found the time to make a video myself but there are several on YouTube. The turbo charger used will have an affect on the sound but should not mask the tuned tone. Yours is a unique application to be sure, I don't recall which turbo you currently have but my standard flange is the T3.
S. Torres swapped out his Fabspeed headers for a set of mine, I don't think he would mind if you asked his impressions of the sound and performance vs the short tube design.
All my stuff is satisfaction guaranteed so if you aren't completely thrilled you can send them back.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 08-30-2010, 10:43 AM
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I had the chance to sell my B&B's to Frank but I sat on the fence to long. I'll do some you-tubing this evening
Old 08-30-2010, 03:03 PM
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What's interesting is a zork has zero drone and IMO isn't all that loud inside the car.
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ -
"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
Movie: 930 on the dyno
Old 08-30-2010, 07:22 PM
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Quote:
Originally Posted by drmatera View Post
You have any audio clips?
I can get some more if you have any requests, this is with a B&B dual outlet exhaust which has much less drone (almost none) with the new headers.

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Old 08-30-2010, 07:39 PM
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I went from stock to fabspeed headers when I first bought the car and that was night and day difference. When I upgraded to Brain's headers it was quite apparent that mid range was a big improvement and as far as up top, I could not really tell but I would bet they are an improvement in both mid and top end. I installed them myself, perfect fit. As far as sound, my car sounded like a muscle car with Fabs and sounded more like a European sports car with Brians headers. Totally different sound. I am very satisfied!! BTW I have nothing against Fabspeed headers. I have their full exhaust on my 996TT. Love it and it sounds great.
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Old 08-30-2010, 08:27 PM
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Chain fence eating turbo
 
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Quote:
Originally Posted by drmatera View Post
I love the manners of my current magnaflow but i'm always striving for a more "exotic" sound.
I have an oval 12" long, 4" inlet/outlet straight through muffler. It sounds just like a 1000cc sportbike with a mild aftermarket exhaust when normally driving. Under boost, it sounds like hell has opened the doors and gets fairly raspy.

I love it and have never heard another car sound like mine.

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Cory - turbo'd '87 C3.2 Guards/Blk, 3.4, 7.5:1 CR P & C's, soon to be 993SS cams and GSXR 750 ITB's fed by 964 intake, Borg-Warner S366 turbo @ 1.4 bar, Treadstone full bay IC, TiAL F46 WG, HKS 1 1/2" BOV, twin 044 pumps, MegaSquirt 2 (v3.57 board) w/EDIS, Tramont wheels (285's rr, 225's frt), Big Reds frt, 993 rr., tower brace, MOMO wheel
Old 08-30-2010, 10:12 PM
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