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Crotchety Old Bastard
 
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No More Crooked Zorks!

Finally got around to implementing a change in my zork tubes that should make them fully universal. We've noticed with the myriad of different turbos and headers folks use that the zork placement is all over the map. I used the 3LDZ with stock heat exchangers as the baseline. Throw on a K27 and you are 1/2" off to the passenger's side. Throw on a set of cheap headers and lord knows where the thing is gonna point. TiAL with a V-band? Maybe an inch off.
So to remedy this we added one more point of adjustment. They now telescope or retract and move side to side. Perfect fit no-matter what setup you have.





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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 06-15-2013, 07:38 PM
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Glad I didn't buy one yet! I'll be picking up one of these in a couple of months. How much more will this be than your standard one you offer? Oh, and it looks awesome. good work.
Old 06-15-2013, 08:01 PM
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Nice job Brian!
Thanks for making some cool exhaust systems for our 930's.
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Old 06-15-2013, 08:20 PM
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Wide body, molester.
 
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Nice!
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Old 06-15-2013, 09:35 PM
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Crotchety Old Bastard
 
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My pleasure!
Cost will be the same, this unit replaces the former Gen II version. We eleminate one welded joint for a slip joint so that cost is a wash. The extra T-band clamp is $5 or so which is absorbed. I've got a few of these in the field now and they are working well. One racer removes the "tailpipe" so the noise points towards the ground at the track.
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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 06-15-2013, 09:37 PM
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Nice Brian
Old 06-16-2013, 05:11 AM
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Looks better than my crooked one.
Old 06-16-2013, 05:25 AM
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Crotchety Old Bastard
 
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Shoot me an email if you have an earlier model and would like to have it modified to be adjustable. We'll do the mod at cost plus shipping.
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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 06-16-2013, 08:57 AM
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Looks like a nice design and I'm sure everyone will like them.

I've seen 3" slip on Supertrap glass pack mufflers for motorcycles that use T-bolt clamps to secure them and the T-bolt and nylock or all steel locknut are made of stainless steel too.
The ones on yours look like gold cad plated plain steel and they will eventually corrode or rust from possibly getting red hot at times and being down close to the ground where they will probably get wet occasionally.

Anyway, I like what you've done.
Old 06-16-2013, 09:52 AM
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Just thinking when maybe I shouldn't but bottom piece a tee so you can run a dual out Zork system.
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'87, Modified WUR, Billet valve, 965 downpipe, Kokeln intercooler, GHL headers, Garrett T04B K27 hybrid, Tial w/.8 bar, WEGO IV, RarlyL8 dual out, LSD
Old 06-16-2013, 09:53 AM
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Crotchety Old Bastard
 
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Yes the clamps may only last a few years on a track car. By that time the slip joints will have siezed up and be difficult to take apart. The joints are made as a set and fairly tight to begin with.

I made a custom GT3 Zork once; very difficult due to space limitations and very expensive as well. It doubled the price if memory serves. Many spacial challenges to get it right. The GT3 tailpipes on my mufflers have a slip joint at the dual split so you can level the 2 pipes perfectly. There is not enough room for that with a zork.
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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 06-16-2013, 10:55 AM
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Quote:
Originally Posted by RarlyL8 View Post

I made a custom GT3 Zork once; very difficult due to space limitations and very expensive as well. It doubled the price if memory serves. Many spacial challenges to get it right. The GT3 tailpipes on my mufflers have a slip joint at the dual split so you can level the 2 pipes perfectly. There is not enough room for that with a zork.
I was thinking not dual out like the GT3 version but instead dual out on each side. A different way to go dual out than on your existng dual out system that I presently have and like alot.
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Last edited by oilonly; 06-16-2013 at 12:28 PM..
Old 06-16-2013, 11:42 AM
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100% stainless steel T-bolt clamps... $5
100% Stainless Steel T-Bolt Clamps - PartsSystems

These will last longer than a few years. Aircraft, race cars, fleet trucks, and motorcycles use them. They don't corrode or rust and the things last.

Quote:
Originally Posted by RarlyL8 View Post
Yes the clamps may only last a few years on a track car. By that time the slip joints will have siezed up and be difficult to take apart. The joints are made as a set and fairly tight to begin with.

I made a custom GT3 Zork once; very difficult due to space limitations and very expensive as well. It doubled the price if memory serves. Many spacial challenges to get it right. The GT3 tailpipes on my mufflers have a slip joint at the dual split so you can level the 2 pipes perfectly. There is not enough room for that with a zork.
Old 06-16-2013, 12:08 PM
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Awesome work as usual Brian!
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Old 06-16-2013, 06:52 PM
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I just installed one of these on my car and the fitment is great. I thought it would be louder just listening to the youtube clips. I was running one of Brian's outlaw straight pipes(one of the first I believe ) and I seem to think that it was louder than the zork at least at idle from inside the car.It may be due to the exhaust was exiting on the passenger side so I could hear it a little more than the sound going straight out the back.Driving impression is all smiles though,The spooling sounds are more pronounced and the butt dyno thinks there's more power there but who really knows. I have noticed I get 1bar with only part throttle in first with a lot more wheel spin much,much easier than before.
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Old 06-18-2013, 07:37 AM
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Nice. One more year of emissions testing and....
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Old 07-01-2013, 06:16 PM
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Warning! Friday wanderings....

Brian,

Just a random thought. If you wanted a single exit to the driver's side, you could pivot the lower 90 degree bend back, add a straight extension and you'd have a Zork passing itself off as a stock exhaust.

Question: would a standard, shorter, center exit Zork be appropriate for an O2 bung to my Innovate A/F system? I'm wondering if the lack of back pressure might make any O2 measurements invalid except under throttle.
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1989 911 Turbo Cabriolet
Mods include: Kokeln IC, GHL Headers, Hooligan muffler, Modified K27 7200, BL WUR, LC-1 & XD-16, Bilstein Sports (4), TRG sway bars, Oversize torsion bars, Strut brace
Old 08-16-2013, 11:08 AM
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Brian, do you sell just the first piece if that zork. From the K27 flange and the next 2.5"?
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Old 08-16-2013, 07:04 PM
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ditto. I am interested in just the flange. I want to test different mufflers out and I can't think of a better way.
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Old 08-16-2013, 07:37 PM
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Quote:
Originally Posted by BlkBird View Post
Warning! Friday wanderings....

Brian,

Just a random thought. If you wanted a single exit to the driver's side, you could pivot the lower 90 degree bend back, add a straight extension and you'd have a Zork passing itself off as a stock exhaust.

Question: would a standard, shorter, center exit Zork be appropriate for an O2 bung to my Innovate A/F system? I'm wondering if the lack of back pressure might make any O2 measurements invalid except under throttle.
Kind of what I was thinking BlkBird, but what i was thinking was making that bottom elbow a Tee so you can have a dual zork exhaust. Out the driver plus pasanger side. JMHO
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'87, Modified WUR, Billet valve, 965 downpipe, Kokeln intercooler, GHL headers, Garrett T04B K27 hybrid, Tial w/.8 bar, WEGO IV, RarlyL8 dual out, LSD
Old 08-17-2013, 04:02 PM
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