Year: 2007
Make: Porsche
Model: 911
Price: $124900
Mileage: 41162
Color: Carrara White
Private or Dealer Listing: Private Listing
Location (State): FL
Transmission: Manual
Drivetrain: 4WD & AWD

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2007 (997.1) Porsche 911 Twin Turbo 4.3 Liter Custom GT35RHTA– 6 Speed – 1350 whp

Car SOLD on 10/6/2021 - Best of luck to the new owner.

Here is my 2007 911 (997) Turbo with 41,162 original miles. Its been an amazing journey but its come time to let her go. This garage kept 6 speed 997 Turbo in Carrara White is well maintained and features a rare and unique Black with Terracotta 2-Tone combination leather interior that is in impeccable showroom condition which can only be appreciated in person. This 997.1 Turbo is a one-of-a-kind configuration with a heavily modified “over the top” build that produces insane power levels. The feeling you get under acceleration at full tilt is beyond what most can comprehend. The power is downright ludicrous. The car has a fully race built 4.3 Liter stroker motor that runs on e85 and produces power levels in the 1350 whp range at 2.0-2.2 bar and even more impressive is 800-1000 whp at just 1 bar of boost (14.7 psi). Its absurd with such a LOW boost setting how fast this car is. I pulled a 3.9 60-130 at 1.6 bar of boost on complete flat ground. The car has been fitted with a Techart body kit and has less than 6,000 miles on the 4.3L engine. Included in this post are all of the factory options along with an EXTENSIVE list of modifications done to the vehicle.

If you review my posts and builds over the years under my username “keithta” you can see I have worked with Prototech and Protomotive. Most of the previous videos are of my smaller builds. In my current 4.3 Stroker Build, the car was dyno’d by Prototech and I was told it made in the 1400 whp range on a street drive hub dyno. I did not get a copy of the pull. I hate to make horsepower claims without an actual dyno to back up the numbers so I am posting comparable builds done by Todd Knighton at Protomotive. If anyone has worked with Todd in the past, you will know him as a very respected and knowledgeable tuner in the Porsche community. He had involvement in most every aspect of my 997 build. Since I do not have a dyno sheet on my vehicle, I am posting dynos from Todd on 2 very similar 997.1 turbo builds to give you a clear idea on the performance this vehicle.

NOTE: The 997.1 Turbo in general comes with very short gearing from the factory. On a 6 speed vehicle, when the car is modified with larger turbo setups, you just cannot stay under load long enough to build boost and create load (due to the short gears). OEM transmission 997.1 Turbos spend way too much time shifting through gears under acceleration which in turn slows the car down. In the instance with the 4.3 huge bore, enormous GT3 intake manifold, 35rHTA turbo setup, the reinforced transmission with the taller gear ratio is an substantial benefit and a key component to get the most out of this build. Under hard acceleration you stay in gear longer without the need for constant up-shifts. The increased torque from the 4.3 Liter allows you to keep in lower gears for longer and produce boost way earlier than smaller liter variants (ie: 3.6, 3.8, 4.0, 4.1) and at the same time reduce the number of shifts per pull. Car will reach 130 mph in 3rd gear and 160+ in 4th. Less shifts = a quicker car. The transmission to power curve set up is dialed in just right. Here is a diagram of the transmission configuration:

4.3 Liter Build Component Review Here - VIDEO

Here are 2 dynos sheets that were provided by Protomotive to put things into perspective.

Here is a dyno pull below on Protomotive's Dynapak dyno of a very similar 4.2L build, a little smaller than the 4.3L my 997 is running. The boost level was about 2.3 on Garret GT3794 turbos. Results: 1564 whp / 1145 wtq




Here is another point of reference below. GT3586HTA turbos (same turbos as my build), but this is a dyno from a 4.1L setup running 2.2 - 2.3 bar of boost at the highest settings. Similar build otherwise - Results: 1334 whp / 1112 wtq.





From Todd at Protomotive:

"Keith, I’ve not run your exact combo here in my shop, so I can only get about this close on either side. We’ve also always stuck to the 103.6 bore here vs. the 105.4 like you have. The machine work is silly to get the 105.4’s in there. The 103.6 is almost drop in. The 4.1 has become our cookie cutter build, lol…

The more interesting part vs. peak power about your 4.3L build is the fact that it probably makes 800+whp at 1 bar of boost!!! Most 996/997.1TT with bolt on’s take 2 bar to hit that number. I know your car is stupid fast, but it doesn’t take so much boost to get there. The lower boost numbers produce a super reliable 800-1000whp package vs. a 1350/1400whp running 2.2-2.3 bar stuff.. Sure you can talk about the peak numbers, but there’s Honda’s out there making that kind of power. They just pop all the time. Running 800-1000whp daily drivers is a whole other thing and very few people can place claim to that"



Total MSRP of my car when purchased new: $144,360.00
Total Value Invested for all Upgrades: $130,000.00
Total Value Invested: $277,360.00

* LISTED FOR SALE AT: $124,900 *

Carfax can be Viewed here

Questions? Please send a PM (Private Message). If you would like to speak by phone, provide your contact information and I will give you a call to discuss.

Keith
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Here are the Build Details:


• 4.3 Liter Engine Conversion with Mahle 105.4 Pistons/Liners, Forged Rods, 7/16” High Tension Head Studs with SS TimeSerts. Custom 82mm Crank Shaft.
• Modified Cams, Custom Ported & O-Ringed Heads, Custom Head Gasket & Seals, High-Tension Valve Springs
• Custom Protomotive/Prototech GT3 Intake Manifolds & Bases (Left and Right Bank) w/Distribution Plenum
• Oversize Throttle Body & Custom Crank Pulley
• Custom Protomotive/Prototech Turbochargers (Garrett GT3586HTA Based), Custom Billet Compressor Wheels, Anti Surge Housings, Lightweight Stainless Turbine Housings w/V-band Inlet and Outlet, Modified Oil Sumps
• Twin Tial MV-R 44mm V-band Wastegates
• Greddy Profec
• Protomotive Custom Air Intakes and Filter System
• Custom 321 Stainless Steel Headers
• Custom Exhaust
• Custom 5" Protomotive Intercoolers
• Custom aluminum intercooler plumbing, turbo inlet piping, silicone hoses, high pressure clamps, etc.
• Protomotive Custom Y-Pipe & Center Plane
• Twin Tial Blow Off Valves and Hardware
• NGK Racing Spark Plugs
• Custom E85 Fuel System with Triple Fuel Pumps w/In-tank Fuel System, Preserves OEM functionality preventing fuel starvation under hard cornering and acceleration
• Additional Fuel System Electrical Components
• Custom Fuel Lines, Fuel Pressure Gauge in Glove Box, Modified Gauge Sending Unit
• 2150cc Saturated / High Impedance Bosch Injectors
• Custom Fuel Rails
• Protomotive Engine Management System Utilizing OEM Bosch ECU with Protomotive Tuning, M&W CDI Ignition System, OEM System Reprogramming to preserve OEM stability management and traction control strategies, ABS, etc.
• High grade system sensors and associated wiring
• Custom ECU calibration by Protomotive


Transmission/Clutch:


• Tilton Triple Carbon clutch pack, custom aluminum flywheel, clutch master cylinder, release bearing, lines and conversion hardware.
• Full Custom 6 Speed Transmission with Billet Components, Shift Forks & Taller Gearing Optimized to Power Level – Estimated Top Speed per Gearing Diagram 255.319 mph (Invested $20,000+/- just in the transmission alone)
• Stronger Reinforced Axles to Handle the Increased Torque
• In Cockpit switch to change from All Wheel Drive to Rear Wheel Drive on the Fly.


Exterior:

Techart Body Kit w/ GT3 Front Vent & Dectane LED Tail Lights & Front Daytime Running Lights


Suspension/Handling:

Upgraded Suspension/Struts, Techart Lowering Springs, TPC Racing Front & Rear Sway Bars.
Toyo Proxes R888 235-35-19 / 295-30-19
Porsche OEM Carbon Ceramic Brakes (PCCB)


Custom Additions:

Built-in Laser Jammer with Switch and Dashboard Indicator
Satellite Radio Plugin Converts OEM Stereo Screen to Include Sirius XM Radio Option (see photos). Works seamlessly like it comes from the Factory. (Satellite Radio was not available in 997 variants)
Lo-Jack Pre-Installed







































Here is the original build from Porsche with complete factory options list:

 

Why the dealer photos and no plate? If those are nor current photos you need to disclose.

 

Hi GT3 Chuck. How are you? Been a long time. The photos are all current. I know a local dealer who let me use their studio for photos. They were all taken a couple of weeks ago.

 

Glws...I’m hangin in like everyone else.

 

A very serious machine! lucky future new owner

 

Wow. Crazy build. Have you tried any standing starts with it? 1/4 mile, etc

 

The last time Ive been to the track with the 997 was 10 years ago and at that time my car was putting down about 820 whp running the 3.6 liter from what I recall. I got there late and didnt have time to run but one pass and I stalled the car at the line (go figure). I havent been back to the track since with the 997 with the big 4.3 build and the modded transmission. Its hands down way faster now with the 4.3 and all the other work, just cannot tell you what it will do in its current form.

here is the last video I have on my channel of the 997 with the smaller build

 

Yeah these cars are tricky to launch, especially once you're beyond the Sachs2.5 clutch

Wish I was in a position to offer you trade + cash no my white 755whp car. Would save me a lot of future money, haha

 

Hello OP, so how many miles have you driven this car since build? and why selling after completion? want more power?

 

No its not about looking for more power ....its actually about downsizing. You can see per my posts on 6speed and my youtube channel (https://www.youtube.com/keithta) all my race and drag strip activity was from about 10 years ago (before I had kids). Priorities changed over the years and don't have the time to enjoy the cars like I used to. I wrestled with letting her go for years before I finally decided on doing so.

Don't have an exact number on the mileage - I mentioned approximately 6000 miles on the 4.3L built motor in my write up above. (I know there is a lot of information above and it probably got lost in the shuffle). The 4.3L build was finished some time in 2015 so I have been running the car with its current build for quite some time now.

 

HI Keith, I tried reaching you via message but that must not be allowed. Can you shoot me a message on my phone? 651-285-9824. Thanks much! Todd

 

Incredible car. GLWS

 

Hey Keith I remember your builds from back in the day. They were truly amazing and it's crazy that your cars still blow my mind. Glws!

 

Car SOLD earlier this week.

 

Nice quick sale. Congrats!