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Crotchety Old Bastard
 
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GT3 Exhaust - Teaser Pics

LOTS of R&D stuff going on right now. Thought I would share a couple of picture from this evening's entertainment. This project has been on the books for over a year and a half, looks like I may have it ready for production in a couple of weeks.
Huge props to Ben and M&K for their welding skills. Always consistent and never any slag.

The concept is simple: replace the center outlet tailpipe with a dual outlet tip. My exhaust systems are modular which means you can mix and match everything without purchasing an entire new muffler. There are currently 5 tailpipe and 3 waste gate configurations.









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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 01-26-2009, 06:57 PM
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Looks great!
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1986 930 Slant nose Black/black RUF
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Old 01-26-2009, 11:12 PM
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Damnit Brian....you pipes are bigger than mine and look cooler...... Kudos on making them - sweet product.
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Old 01-27-2009, 01:31 AM
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BTW what size outlet is that? 3"?
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Old 01-27-2009, 01:46 AM
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Crotchety Old Bastard
 
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But yours are dual turbos ...

Yes, dual 3".
I need to trim back the 90 and add length to the tips for aesthetics. Will be done then.
Should have that done this week so rear pix by weekend.
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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 01-27-2009, 04:04 AM
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great looking exhaust!! very nice!! maybe i can persuede you to fab me up something like that for a zork type setup i want to use on the track!
Old 01-27-2009, 06:03 AM
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Crotchety Old Bastard
 
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Should be do-able, will have to look at the angles.
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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 01-27-2009, 07:13 AM
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Wo ist die Rennstrecke?
 
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Brian - is that an O2 bung I see on the pressure side of the turbo flange?
Old 01-27-2009, 04:35 PM
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Sweet!
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Dave

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Old 01-27-2009, 05:57 PM
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Crotchety Old Bastard
 
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Good eye Don.
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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 01-27-2009, 06:20 PM
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Quote:
Originally Posted by RarlyL8 View Post
But yours are dual turbos ...

Yes, dual 3".
I need to trim back the 90 and add length to the tips for aesthetics. Will be done then.
Should have that done this week so rear pix by weekend.
Yeah and the fact that you make me envy those tips speaks volumes as to your work
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Old 01-27-2009, 09:24 PM
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Wo ist die Rennstrecke?
 
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NGK recommends not to put their O2 sensor upstream to the turbo (they don't like the positive pressure). This is why I mounted mine about 6in from the turbine. What O2 are you recommending with this setup?

Also, do you know of any good twin turbo header builders? Marco Manzie is impossible to contact.
Old 01-28-2009, 03:54 PM
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Quote:
Originally Posted by DonE View Post
NGK recommends not to put their O2 sensor upstream to the turbo (they don't like the positive pressure). This is why I mounted mine about 6in from the turbine. What O2 are you recommending with this setup?

Also, do you know of any good twin turbo header builders? Marco Manzie is impossible to contact.

most factory turbos have the o2 before the turbo

as to headers you may look at adapting 993 turbo headers
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Old 01-28-2009, 05:06 PM
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Nice looking work there guys!!!

Cheers
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Old 01-28-2009, 05:45 PM
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Crotchety Old Bastard
 
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Don if I were going twins I would take a serious look at the factory 993tt exchangers.






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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 01-28-2009, 07:05 PM
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Kinda of off topic, but maybe not when you think about.

Are the 996TT exh ports center-to-center dimensions the same as the 993TT? I know they used the same case, well almost anyway. I was wondering if it would another case of "flange flipping" to get these to work on earlier exhaust ports.
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Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, Fikse FM-5's 8&10x17, 8:41 R&P
Old 01-29-2009, 05:50 AM
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Wo ist die Rennstrecke?
 
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Quote:
Originally Posted by RarlyL8 View Post
Don if I were going twins I would take a serious look at the factory 993tt exchangers.
Are they a direct bolt-on for a 930? If so, what size are the primaries?
Old 01-29-2009, 03:23 PM
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Crotchety Old Bastard
 
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Don, you have to flip the flanges just like the 993 N/A exchangers.
The only drawback that I could see was that the passenger's side turbo interfered with the 930 oil tank. You would need to modify the oil tank or relocate it a-la 965.
I don't recall the size of the primaries but those exchangers will support big power. You gotta love the packaging combined with real heat and OEM quality.
Worthy consideration.
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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 01-29-2009, 04:52 PM
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