The 986whp 991TT build you've never head of, until now!! - Rennlist - Porsche Discussion Forums

Go Back  Rennlist - Porsche Discussion Forums > Turbo Technical Discussion Areas > 991 Turbo
Reload this Page >

The 986whp 991TT build you've never head of, until now!!

Notices
991 Turbo Turbo and Turbo S

The 986whp 991TT build you've never head of, until now!!

 
Old 12-30-2018, 03:58 PM
  #1  
CSF Cooling
Basic Sponsor
Rennlist
Site Sponsor

Thread Starter
 
CSF Cooling's Avatar
 
Join Date: Dec 2013
Location: Newport Beach, CA - USA
Posts: 228
Default The 986whp 991TT build you've never head of, until now!!

Hi Guys,

Hope all is well and that everyone is enjoying the holidays and wrapping up 2018 in style!

Would like to share the public release of our new company demo race car. Will be using this to try and crack 200mph in the 1/2 mile.

POWER
  • Three maps, selectable through cruise control stalk
    • 91oct Pump Gas - 647whp / 18psi
    • 100oct Race Gas - 807whp / 27psi
    • E85 Kill Mode - 986whp / 30psi

THE CAR
2015 911 Turbo S
~26,360 miles
- about 600 miles on the new engine build. This car will be used as the demo race car for my company CSF Cooling. Showcasing our world-record holding intercoolers + upgraded radiator cooling systems.

Three maps, selectable through cruise control stalk
91oct Pump Gas - 647whp / 18psi
100oct Race Gas - 807whp / 27psi
E85 Kill Mode - 986whp / 30psi

The car was built by Evolution MotorSports of Arizona of Arizona along with engine build by John Bray at EvoSpec, and will be getting some help from some other partners GMG Racing / Sheepey Race

EXTERIOR / INTERIOR
Agate Grey Exterior, Black Leather Interior
Yellow Instrument Cluster and Floor Mats

WHEELS / BREAKS
Centerlock Wheels w/ Fresh Toyo R888R Tires, 265/315 widths
PCCB Brakes

EXTRAS
K40 Radar/Laser Detector Built In

ENGINE BUILD
Evospec/CP Forged Piston Set
Evospec/Carrillo H-Beam Connecting Rods w/ Carr Bolts
Evospec Head Stud Kit
Evospec Press-In Iron Liners - Replaces easily-damaged factory aluminum bores with extremely tough and durable liners
Evospec Head Gaskets, w/ O-rings
Evospec Rod Bearings
OEM Main/Thrust Bearings, OEM Gaskets/seals
Two new OEM fuel injectors after corrosion was found on original parts
New OEM Oil Separator

EVOMS EVT1100 TURBO SYSTEM
Borg Warner EFR7163 Ball Bearing Turbochargers
Turbosmart IWG Actuators and Custom Brackets/Wastegate Rods
321 Stainless Steel Headers
Firesleeved/heat protected Turbo Lines/Hardware
Custom Valved Exhaust, 2.5" Muffler for light load or 2.5" Straight Dump for under boost. Practical for cruising on long freeway drives while supporting basically 1000whp
3" Aluminum Turbo Inlet Plumbing
Custom High Flow Intakes/Air Filters, uses stock cold air ducting from decklid to airbox
Custom High Flow Y-Pipe
CSF Cooling - 4.5 inch high performance intercoolers
CSF Cooling - 3-piece all-aluminum radiator kit

Custom Secondary Port Injection Fuel System
Twin Brushless In-Tank Fuel Pumps, OE Pump Controllers w/ Relayed Power Supply, High Flow Filters, and Custom Feed/Return Lines for Secondary Fuel System
DFI System is completely intact and functions with stock ECU plugged in
SRM Intake Manifold Spacers, Center Intake Plenum, and Fuel Rails
ID1050x Secondary Injectors

ENGINE MANAGEMENT
Syvecs 991 Turbo Plug'n'Play Standalone ECU
Tuned by Wayne Potts of ISC Tuning
Full flex fuel support with automatic map blending, 'Map 3 Safe Mode' to prevent car from running full power with weak ethanol blends, etc.
Custom tuned launch/traction control. Launches soft at 3500rpm to preserve the gearbox and consistently lays down 2.4x 0-60 passes in 100F Phoenix heat.

TRANSMISSION UPGRADES
Dodson PDK Clutch Upgrade
Cobb PDK Software, Running 'High Torque Aggressive Map'
Fresh OEM Filter and Fluid

Just have to add the Dodson PDK brace + some additional tuning, and it will be making it's way to California - then will be adding some show bits, and it will be ready to rock!!

NEXT UP
Looking to add some functional ascetics to the car.
- 991.2 GT3 Cup front bumper
- Advan GT Racing wheels
- Looking for duckbill spoiler? Anyone got any suggestions?? Other option would be Techart rear wing
- GT2RS intercooler Ducts
- Sparco SPRX seat with GMG roll bar.
- KW V3 coilover kit with lift kit.
Looking for feedback and suggestions on what's going to make this car look as fast as it is!

Let me know if anyone has any questions!

Happy new years!









__________________
http://www.CSFrace.com/
CSF Cooling is offline  
Old 01-01-2019, 12:34 PM
  #2  
abu5
User
 
Join Date: Apr 2013
Posts: 23
Default

sheesh
abu5 is offline  
Old 01-01-2019, 02:45 PM
  #3  
Randyc151
Addict
Rennlist Member
 
Randyc151's Avatar
 
Join Date: Jul 2015
Location: Richmond, VA
Posts: 879
Default

You'll need to lower the car. I like Techart Springs. Also, you will need to add Awe Tuning air foils to reduce the wind turbulence inside the car if the windows are down. Also, Cups2's or Trofeo R's are much better than the Toyo for grip and braking. I also highly recommend the DSC V3 box for PASM control, and you can put a smaller battery or Lithium battery in to save a ton of weight. Very nice job on the performance.
Randyc151 is offline  
Old 01-02-2019, 03:33 AM
  #4  
Jean
Addict
Lifetime Rennlist
Member

 
Jean's Avatar
 
Join Date: Apr 2002
Location: Dubai- Beirut
Posts: 4,997
Default

Nice build CSF! Syvecs non-VTG turbo-based cars seem to be going really fast, the VTG imitations are all gone.

My question is if you are using this car for the half mile, you would want the best aerodynamics possible, why go with a Cup body setup, it increases drag. Definitely lower the car with springs as Randy suggested or if you will be using it on circuit, then I would go with full suspension upgrade in terms of bushings, control arms and shocks.

Since you have gone this far, you could also add a GT2RS water spray system on your coolers.

Would be great if you could post datalogs of your runs showing IAT vs speed and boost to see how the intercoolers perform.
Jean is offline  
Old 01-02-2019, 11:53 AM
  #5  
pr-s
User
 
Join Date: Jul 2010
Posts: 20
Default

Great build, congrats !!

Sorry for my ignorance, but why lowering the car will help with 1/4 and 1/2 mile times and mph? Also, is it posible to find a GT2 RS water spray for our cars?
pr-s is offline  
Old 01-02-2019, 12:14 PM
  #6  
Jean
Addict
Lifetime Rennlist
Member

 
Jean's Avatar
 
Join Date: Apr 2002
Location: Dubai- Beirut
Posts: 4,997
Default

Originally Posted by pr-s View Post
Great build, congrats !!

Sorry for my ignorance, but why lowering the car will help with 1/4 and 1/2 mile times and mph? Also, is it posible to find a GT2 RS water spray for our cars?
To reduce aerodynamic drag and reduce lift.. you need over 400hp at 200mph just to overcome aerodynamic drag.

Yes you can find it but you will need programming of the factory ECU. Or itĺs easier with Syvecs.
Jean is offline  
Old 01-02-2019, 02:02 PM
  #7  
pr-s
User
 
Join Date: Jul 2010
Posts: 20
Default

Thanks, since I come from a C7 Z06 and a Gen V Viper Twin Turbo I had the mentality that suspension lift is good for better traction on rear tires. Now I have a 991.1 TTS with a ByDesign stage 4 with meth. Need to improve traction, so I'll think about adding lowering springs.
pr-s is offline  
Old 01-02-2019, 08:01 PM
  #8  
EVOMS
Basic Sponsor
Rennlist
Site Sponsor

 
EVOMS's Avatar
 
Join Date: Oct 2013
Location: Phoenix, AZ
Posts: 313
Default

Originally Posted by Jean View Post
Nice build CSF! Syvecs non-VTG turbo-based cars seem to be going really fast, the VTG imitations are all gone.

My question is if you are using this car for the half mile, you would want the best aerodynamics possible, why go with a Cup body setup, it increases drag. Definitely lower the car with springs as Randy suggested or if you will be using it on circuit, then I would go with full suspension upgrade in terms of bushings, control arms and shocks.

Since you have gone this far, you could also add a GT2RS water spray system on your coolers.

Would be great if you could post datalogs of your runs showing IAT vs speed and boost to see how the intercoolers perform.
Getting rid of the VTGs and 'fixing' the other marginal/weak items (fuel delivery, cast iron sleeves, etc.) really opens up the floodgates on this platform in terms of performance and reliability. VTGs are a pretty cool technology, but we feel they're being pushed beyond their useful range by a lot of folks. The useful range of the turbos seems matched by the capabilities of the stock fuel system, gearbox, and engine internals, with various band-aids being used to push the boundaries a bit (with results that reflect the reliability of a band aid fix). There's a steep cost to a customer to upgrade all of those items beyond stock, and there are some very complicated and sophisticated hurdles to overcome for the tuning shop--but once all of those are past, it's a (relatively straight-forward) just a turbo kit that is needed to make way more power than VTGs could dream of.

The CSF intercoolers do a great job at this power level. At 1000whp and 30psi on the EFR7163 turbos there is a smaller rise in intake temps over a 60-130 run than a 650hp Stage 2 991TT has on stock intercoolers. I'll see if we have an data we can put together into a cool chart--if we don't, we have a racing program lined up for this year and that kind of data will be published from those results.

Sam
__________________
Evolution MotorSports | www.evoms.com
EVOMSit - intelligent tuning |www.evomsit.com
P: 480.317.9911
F: 480.317.9901
E: [email protected]
Home of the Worlds Fastest Watercooled Porsche(s)
Standing Mile = 234.6 MPH
1/4 Mile Time = 9.29 Seconds
1/4 Mile Speed = 172.7 MPH
60-130 MPH Time = 3.28 Seconds
EVOMS is offline  
Old 01-04-2019, 08:53 AM
  #9  
IMI A
User
 
IMI A's Avatar
 
Join Date: Mar 2017
Posts: 129
Default

Originally Posted by EVOMS View Post
Getting rid of the VTGs and 'fixing' the other marginal/weak items (fuel delivery, cast iron sleeves, etc.) really opens up the floodgates on this platform in terms of performance and reliability. VTGs are a pretty cool technology, but we feel they're being pushed beyond their useful range by a lot of folks. The useful range of the turbos seems matched by the capabilities of the stock fuel system, gearbox, and engine internals, with various band-aids being used to push the boundaries a bit (with results that reflect the reliability of a band aid fix). There's a steep cost to a customer to upgrade all of those items beyond stock, and there are some very complicated and sophisticated hurdles to overcome for the tuning shop--but once all of those are past, it's a (relatively straight-forward) just a turbo kit that is needed to make way more power than VTGs could dream of.

The CSF intercoolers do a great job at this power level. At 1000whp and 30psi on the EFR7163 turbos there is a smaller rise in intake temps over a 60-130 run than a 650hp Stage 2 991TT has on stock intercoolers. I'll see if we have an data we can put together into a cool chart--if we don't, we have a racing program lined up for this year and that kind of data will be published from those results.

Sam
Good post. I'm a bit surprised Porsche didn't drop VTGs for their new GT2 RS and go for something similar to a conventional turbo like your choice of EFR7163 instead.
IMI A is offline  
Old 01-04-2019, 11:12 AM
  #10  
Jean
Addict
Lifetime Rennlist
Member

 
Jean's Avatar
 
Join Date: Apr 2002
Location: Dubai- Beirut
Posts: 4,997
Default

Originally Posted by IMI A View Post
Good post. I'm a bit surprised Porsche didn't drop VTGs for their new GT2 RS and go for something similar to a conventional turbo like your choice of EFR7163 instead.
They have no reason to drop it, amazing turbos, a manufacturer has much more to look for than outright performance, daily use response, emissions, regulations on noise, longevity etc.. The VTGs do an outstanding job, peak torque from 2200 RPMs in certain applications, but do have compressor and turbine size limitations like all other turbos, which are not suitable to a build like this one..
Jean is offline  
Old 01-04-2019, 02:45 PM
  #11  
EVOMS
Basic Sponsor
Rennlist
Site Sponsor

 
EVOMS's Avatar
 
Join Date: Oct 2013
Location: Phoenix, AZ
Posts: 313
Default

Originally Posted by Jean View Post
They have no reason to drop it, amazing turbos, a manufacturer has much more to look for than outright performance, daily use response, emissions, regulations on noise, longevity etc.. The VTGs do an outstanding job, peak torque from 2200 RPMs in certain applications, but do have compressor and turbine size limitations like all other turbos, which are not suitable to a build like this one..
Yeah, within the scope of all the small aftermarket companies there are limited changes/modifications that can be made to improve flow through the proprietary VTG hotside, so the turbos end up a bit imbalanced with the turbine side being a restriction to the capabilities of the upgraded compressors and you have big backpressure issues. Porsche have the ability to produce a larger VTG hotside to match the larger compressor size needed to make their ~700hp which alleviates a lot of the extremes that occur with when putting upgraded 65/68/71mm compressor wheels on a 'standard' line VTG turbo and the pushing them towards the max capabilities of the compressor. They've done this before with the 997 GT2 turbos, which had substantially larger turbine housings than regular 997TT turbos. These larger hotsides show a marked improvement in performance and octane sensitivity when you do the same 65/68/71mm compressor wheel upgrade and use them on a modified car. The GT2 turbos are almost impossible to find used, and are something like $8k per set to buy new (plus the cost of modifying them on top of that), so it's never really been pursued by the aftermarket as it's extremely expensive. I haven't looked but I imagine the 991 GT2RS turbos are going to be at least, if not more expensive.

All that being said, we were going go a Syvecs standalone anyways on this car to control the secondary fuel system so moving away from VTG turbos was not a problem (although the Syvecs can run VTGs itself), and the next best option to VTGs in terms of responsiveness on a street driven car are the Borg Warner EFRs. The EFR uses a titanium ceramic turbine wheel that is extremely lightweight, along with modern aero on the compressor and turbine wheels. This means that they are very responsive turbos for their size, both in terms of what RPM they make boost as well as how long it takes them to go from no boost to full boost. The midrange on this car is currently VERY conservative to keep the stock gearbox (with clutches) alive on the street. This is being reworked ahead of this race season and should give a very impressive powerband for the size of the turbos once that is all in place.

Sam
__________________
Evolution MotorSports | www.evoms.com
EVOMSit - intelligent tuning |www.evomsit.com
P: 480.317.9911
F: 480.317.9901
E: [email protected]
Home of the Worlds Fastest Watercooled Porsche(s)
Standing Mile = 234.6 MPH
1/4 Mile Time = 9.29 Seconds
1/4 Mile Speed = 172.7 MPH
60-130 MPH Time = 3.28 Seconds
EVOMS is offline  
Old 01-04-2019, 06:36 PM
  #12  
Jean
Addict
Lifetime Rennlist
Member

 
Jean's Avatar
 
Join Date: Apr 2002
Location: Dubai- Beirut
Posts: 4,997
Default

Well explained
Originally Posted by EVOMS View Post
I haven't looked but I imagine the 991 GT2RS turbos are going to be at least, if not more expensive.
Sam
Around $4,700 ea. today.
Jean is offline  
Old 01-04-2019, 08:10 PM
  #13  
BOOSTED TTS
Addict
Rennlist Member
 
BOOSTED TTS's Avatar
 
Join Date: Jul 2015
Location: Miami, FL.
Posts: 456
Default

Nice build, subscribed!

Sam (EVOMS), nice to hear from...it's been awhile!

Manuel

PS: H&R's all the way!
BOOSTED TTS is offline  
Old 01-05-2019, 02:53 AM
  #14  
Payam_BMS
User
 
Join Date: Nov 2018
Posts: 20
Default

Really awesome!!
Payam_BMS is offline  
Old 02-05-2019, 01:48 AM
  #15  
CSF Cooling
Basic Sponsor
Rennlist
Site Sponsor

Thread Starter
 
CSF Cooling's Avatar
 
Join Date: Dec 2013
Location: Newport Beach, CA - USA
Posts: 228
Default

Update on the car - new parts that just came in from the UK.

Here is the 1st set in the USA (prototype set) from my friends at Eventuri Intakes.

Beautiful piece of engineering which will look good, and will hopefully perform well as well! (I have no doubt, my friends make some awesome intakes!)

The way these intakes look, I might just have to run with no rear bumper!



New Carbon Fiber Intake for 991 Turbo / TurboS - fits both 991.1 & 991.2 systems






__________________
http://www.CSFrace.com/
CSF Cooling is offline  

Thread Tools
Search this Thread

Contact Us About Us Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: