997 Turbo / GT2 2006–2012 Turbo discussion on the 997 model Porsche 911 Twin Turbo.

New Project II - EVT900 Clubsport 3.8L Build

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Old 10-31-2009 | 10:03 AM
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New Project II - EVT900 Clubsport 3.8L Build

This seems to be the month of Tiptronics. We have some major projects taking place with Tiptronic cars and we will without a doubt be pushing the limits of this transmission with this engine. This project is being built for a very good customer of ours in Bahrain who has many EVOMS prepared Porsche cars. Back in 2002, we built this client a 996TT engine with strengthened internals. This was our first 996TT engine that we built and 7 years later, it is still going strong. We have also built this customer a 700 HP 996TT GT2 and a 700 HP 997TT GT2.



Engine Details:
  • EVOMS built 3.8L conversion
  • EVOMS spec Carrillo connecting rods
  • EVOMS 12mm head stud conversion
  • EVOMS CNC ported cylinder heads w/ titanium big valves and associated titanium valve train components
  • GT3 RS oil pump
  • EVOMS Clubsport GT35 turbo system w/ external wastegates
  • EVOMS Clubsport intercoolers
I will post the component photos, engine assembly process and more details here shortly. Here are a few to start.

















 
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Home of the Worlds Fastest 997TT Porsche(s)
997TT Standing Mile = 234.6 MPH
997TT Standing 1/2 Mile = 217.09 MPH
Fastest 1/4 Mile = 9.29 @ 172.7 MPH
60-130 MPH Time = 3.28 Seconds
  #2  
Old 10-31-2009 | 10:33 AM
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You guys do some incredible work!! Thumbs way up! I had a question, though. I'm no machinist, but those ports look a little rough. I know it's CNC'd, but is that just an illusion, or are they smoothed out?
 
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Old 10-31-2009 | 01:00 PM
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Originally Posted by jpvarghese
You guys do some incredible work!! Thumbs way up! I had a question, though. I'm no machinist, but those ports look a little rough. I know it's CNC'd, but is that just an illusion, or are they smoothed out?
There are a bunch of different theories about this. Some say that polishing is better. We actually combine this "rifling" machined surface with a polish finish at the valve seat. The rough cut on the main chambers acts to help a swirling affect and improves air velocity. We then polish the port before the valve seat which helps to smooth the air before the valve. With the shape and size of the ports, this is what produced the best results. <!-- google_ad_section_end --> <!-- / message --><!-- sig -->
 
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P: 480.317.9911
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Home of the Worlds Fastest 997TT Porsche(s)
997TT Standing Mile = 234.6 MPH
997TT Standing 1/2 Mile = 217.09 MPH
Fastest 1/4 Mile = 9.29 @ 172.7 MPH
60-130 MPH Time = 3.28 Seconds
  #4  
Old 10-31-2009 | 02:38 PM
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Wow - you guys have a lot of cool projects in the works.
 
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Old 10-31-2009 | 03:36 PM
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nice project .. keep the good work
 
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Old 10-31-2009 | 05:40 PM
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the owner got one of the best 911 in GCC area. good luck with new built.
 
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Old 10-31-2009 | 06:26 PM
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Wow, this car gives me the gooooose-bumps thinking of how hard the pull must be from that kind of power....
 
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Old 11-01-2009 | 02:07 PM
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Looks good, what will you be doing to the tiptronic transmission for it to handle all that power?
 
  #9  
Old 11-26-2009 | 12:49 PM
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Originally Posted by sayegh87
Looks good, what will you be doing to the tiptronic transmission for it to handle all that power?
Update Time

We have already upgraded the TQ converter. We have found a company that upgrades the valve body, clutches, and pump to hold the power and high rev's. The customer is deciding on which route we will go. I will update the progress with some photos later.
 
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Evolution MotorSports | www.evoms.com
EVOMSit - intelligent tuning |www.evomsit.com
P: 480.317.9911
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Home of the Worlds Fastest 997TT Porsche(s)
997TT Standing Mile = 234.6 MPH
997TT Standing 1/2 Mile = 217.09 MPH
Fastest 1/4 Mile = 9.29 @ 172.7 MPH
60-130 MPH Time = 3.28 Seconds
  #10  
Old 11-26-2009 | 01:43 PM
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Engine Details:
  • EVOMS built 3.8L conversion
  • EVOMS spec Carrillo connecting rods
  • EVOMS 12mm head stud conversion
  • EVOMS CNC ported cylinder heads w/ titanium big valves and associated titanium valve train components
  • GT3 RS oil pump
  • EVOMS Clubsport GT35 turbo system w/ external wastegates
  • EVOMS Clubsport intercoolers






























 
__________________
Evolution MotorSports | www.evoms.com
EVOMSit - intelligent tuning |www.evomsit.com
P: 480.317.9911
F: 480.317.9901
E: info@evoms.com
Home of the Worlds Fastest 997TT Porsche(s)
997TT Standing Mile = 234.6 MPH
997TT Standing 1/2 Mile = 217.09 MPH
Fastest 1/4 Mile = 9.29 @ 172.7 MPH
60-130 MPH Time = 3.28 Seconds
  #11  
Old 11-26-2009 | 05:53 PM
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Originally Posted by evoviiiyou
Im sure it will. Based on these pics, its a beautiful build! Congrats EVOMS. Im looking forward to this builds completion.
Thank you. I would like to finish it as well. We have not had the time to dedicate to it with the other engine builds. After we complete this 900 HP tip, John will get the 4.0L finished
 
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Evolution MotorSports | www.evoms.com
EVOMSit - intelligent tuning |www.evomsit.com
P: 480.317.9911
F: 480.317.9901
E: info@evoms.com
Home of the Worlds Fastest 997TT Porsche(s)
997TT Standing Mile = 234.6 MPH
997TT Standing 1/2 Mile = 217.09 MPH
Fastest 1/4 Mile = 9.29 @ 172.7 MPH
60-130 MPH Time = 3.28 Seconds
  #12  
Old 11-26-2009 | 07:54 PM
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Here are some more pictures of the engine assembly.


John installing the 3.8L steel liners


Installation of the 3.8L steel liners and pistons




Long block going together. Heads on and torqued.






Installation and timing of the EVOMS intake and exhaust camshafts






Long block assembled. Getting ready for the rest of the components
 
__________________
Evolution MotorSports | www.evoms.com
EVOMSit - intelligent tuning |www.evomsit.com
P: 480.317.9911
F: 480.317.9901
E: info@evoms.com
Home of the Worlds Fastest 997TT Porsche(s)
997TT Standing Mile = 234.6 MPH
997TT Standing 1/2 Mile = 217.09 MPH
Fastest 1/4 Mile = 9.29 @ 172.7 MPH
60-130 MPH Time = 3.28 Seconds
  #13  
Old 11-26-2009 | 08:08 PM
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This is where the fun begins.

















 
__________________
Evolution MotorSports | www.evoms.com
EVOMSit - intelligent tuning |www.evomsit.com
P: 480.317.9911
F: 480.317.9901
E: info@evoms.com
Home of the Worlds Fastest 997TT Porsche(s)
997TT Standing Mile = 234.6 MPH
997TT Standing 1/2 Mile = 217.09 MPH
Fastest 1/4 Mile = 9.29 @ 172.7 MPH
60-130 MPH Time = 3.28 Seconds
  #14  
Old 11-27-2009 | 11:14 AM
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Our customer just saw the photos of his engine and here was his email to us:

"Ohh man what can i say, i'm speechless, its amazing!! It is so clean and I can't believe the craftsmanship and details in this build. I have done
many JDM engine builds in the states from really well knows companies from east to the west coast, but this Porsche engine is special. I can't wait to see what it will do on the dyno. Please thank all the guys that worked on this project, i'm so happy and now I can say that the wait was well worth it :-) Let me know when this baby is going to be installed in your car for testing. I am worried that after you install it, you won't want to let it go. LOL - EK"

Here are a few photos of his cars / stable
 
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__________________
Evolution MotorSports | www.evoms.com
EVOMSit - intelligent tuning |www.evomsit.com
P: 480.317.9911
F: 480.317.9901
E: info@evoms.com
Home of the Worlds Fastest 997TT Porsche(s)
997TT Standing Mile = 234.6 MPH
997TT Standing 1/2 Mile = 217.09 MPH
Fastest 1/4 Mile = 9.29 @ 172.7 MPH
60-130 MPH Time = 3.28 Seconds
  #15  
Old 11-27-2009 | 02:48 PM
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Hey Todd

What about tranny? is it reinforcement or what??
 


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