2014 CTS to get TT v6

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Shaun41178(2)
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2014 CTS to get TT v6

Post by Shaun41178(2) »

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The 2014 Cadillac CTS is right around the corner and we're finally getting to see the new design as bits of camo are peeled away.

And the big thing peeled away this time is the hood. Hiding under that hood is a new twin-turbo V6 that gets a handy engine cover with "Twin Turbo" molded in. These engine covers are more than decorative as they're an integral part of controlling the rather unpleasant sounds of direct-injection so it's expected that they need to test with them installed. They took the time to cover up the Wreath and Crest, but left the fun stuff.

Beyond that we've see a new interior for the CTS that includes paddle shifters, stitched dash, and a traditional fixed navigation/control screen (though it does appear to hide a little bin a-la the Malibu) that will offer Caddy's new CUE media interface.


Cadillac is reportedly developing two new twin-turbocharged V6s, a 3.0L and a 3.6L, with the unit spotted in this prototype believed the be the former. The twin-turbo 3.0L will sit atop the naturally aspirated 3.6L V6 in the CTS range, giving buyers the option of a more fuel efficient engine without giving up any performance.

Of course the twin-turbo 3.6L V6 could eventually surface in the CTS, but the mill is thought to be reserved for the high-performance ATS-V.
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In the 2014 Cadillac CTS, the engine produces 420 hp at 5750 rpm and 430 lb-ft of torque at 3500-4500 rpm. On this non-V CTS, Cadillac claims a 0-60 mph time of 4.6 seconds with a top speed of about 170 mph. A version of the engine will also be made available in the 2014 Cadillac XTS.

The 2014 CTS’ twin-turbo V-6 will be mated to an eight-speed automatic with paddle shifters. Though we’ll hold off judgment until we’ve had a chance to test a new CTS, Cadillac claims the new transmission allows for quieter highway driving with quick wide-open-throttle upshifts and 1.5-percent improved fuel economy over a six-speed automatic. GM says 90 percent of the engine’s torque is available from 2500-5500 rpm.

The rest of the 2014 Cadillac CTS lineup is predictable — the ATS’ turbocharged 2.0-liter I-4 is the base engine, with 272 hp and 295 lb-ft of torque. The engine is offered with a six-speed automatic and GM estimates that highway fuel economy may hit 30 mpg in rear-drive form (18-19/28-30 mpg for RWD and AWD). All-wheel drive will be available on the turbo 2.0-liter I-4 and the 3.6-liter V-6, which now makes 321 hp and 275 lb-ft of torque. While premium gas is recommended on the I-4, the 3.6-liter V-6 runs on regular and is expected to get 18-19/27-28 mpg for RWD and AWD. Until a V variant comes along, the Twin Turbo model sits at the top of the CTS lineup, with a GM-estimated 17/25 mpg and required premium gas.

In GM’s release there was no mention of the ATS-V, but if the 420-hp twin-turbo 3.6-liter V-6 can make the 2014 CTS accelerate from 0-60 mph in 4.6 seconds, it may do just fine under the hood of the ATS.
FieroPhrek working on that ls4 swap for 18 years and counting now. 18 years!!!!! LOL

530 whp is greater than 312
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Re: 2014 CTS to get TT v6

Post by Shaun41178(2) »

GM press release
2013-03-18

420 horsepower (313 kW) / 430 lb-ft of torque (583 Nm) – SAE certified
Most power-dense six-cylinder in segment at 118 hp/liter
Cadillac's first twin-turbo engine and eight-speed automatic transmission

DETROIT – Cadillac today announced details of a new Twin-Turbo V-6 engine and eight-speed transmission – firsts for the brand and signature features of the all-new 2014 Cadillac CTS midsize luxury sedan debuting next week at the New York Auto Show.

The Cadillac Twin-Turbo V-6 is the most power-dense six-cylinder engine in the midsize luxury segment – a 3.6L with 118 horsepower per liter (88 kW/liter) – and the eight-speed automatic enhances fuel economy and acceleration over a six-speed automatic.

"The new Cadillac Twin-Turbo brings a new dimension of technologically advanced performance to the all-new 2014 Cadillac CTS sedan," said David Leone, executive chief engineer. "Delivering power and sophistication, it marks another large step forward in the product-driven expansion of Cadillac."

Rated at an SAE-certified 420 horsepower (313 kW) and 430 lb.-ft. of torque (583 Nm), it is the most powerful V-6 ever from General Motors. It also has 15 percent greater power density than BMW 535i's turbocharged 3.0L six, which is rated at 300 horsepower (223 kW), for a ratio of 100 horsepower per liter (74 kW/liter) – and even the BMW 550i's TwinPower 4.4L V-8, rated at 400 horsepower (298 kW), or 91 horsepower per liter (68 kW/liter). Power density is a measure of efficiency for an engine's size.

A pair of smaller turbochargers and an efficient charge air cooler help provide more immediate power delivery. Additionally, approximately 90 percent of the 3.6L Twin-Turbo's peak torque is available from 2,500 rpm to 5,500 rpm, giving the engine a broad torque curve that customers will feel as strong, willing power in almost all driving conditions, such as accelerating or overtaking traffic on the highway.

Those features help the new CTS sedan reach 60 mph from a standstill in an estimated 4.6 seconds and achieve an estimated top speed of 170 mph (274 kph).

The new Cadillac Twin-Turbo will expand the performance envelope of the upcoming 2014 CTS midsize luxury sedan, launching this fall in the United States. The engine will also will be offered in the 2014 XTS large luxury sedan this fall.

The new engine is a comprehensive upgrade on the 60-degree, 3.6L DOHC V-6 offered in today's SRX, XTS and ATS. However, almost every component is unique. New features include:

All-new cylinder block casting
All-new cylinder head castings
Strengthened connecting rods
Machined, domed aluminum pistons with top steel ring carrier for greater strength
10.2:1 compression ratio
Patented, integrated charge air cooler system with low-volume air ducts
Two turbochargers produce more than 12 pounds of boost (80 kPa)
Vacuum-actuated wastegates with electronic control valves
All-new direct injection fuel system
Tuned air inlet and outlet resonators, aluminum cam covers and other features that contribute to exceptional quietness and smoothness.
The 2014 CTS sedan will also feature the naturally aspirated 3.6L V-6 rated at 321 horsepower, as well as a 2.0L turbocharged engine rated at an estimated 272 horsepower.

Proven foundation, new features

Because the Cadillac Twin-Turbo is based on the same architecture as the existing naturally aspirated 3.6L V-6, it benefits from many proven technologies including dual-overhead camshafts, variable valve timing and direct injection. Key features also include:

A durable forged steel crankshaft that contributes to greater high-rpm smoothness
A friction-reducing polymer coating on the piston skirts, as well as fully floating wrist pins that help reduce friction
Pressure-actuated oil squirters drench the underside of each piston and the surrounding cylinder wall with an extra layer of cooling, friction-reducing oil
A cast aluminum oil pan is stiffer to improve powertrain rigidity and reduce vehicle vibration. It bolts to the transmission bell housing as well as the engine block, eliminating points of vibration.
The cylinder block casting is unique to the turbocharged engine with cast-in provisions for turbocharger coolant and oil connections, as well as positive crankcase ventilation passages. It uses nodular iron main bearing caps for greater strength to manage the higher cylinder pressures that come with turbocharging.

The cylinder heads are also unique to the Cadillac Twin-Turbo. They feature a high-tumble intake port design that enhances the motion of the air charge for a more-efficient burn when it is mixed with the direct-injected fuel and ignited in the combustion chamber. The topology of the pistons, which feature centrally located dishes to direct the fuel spray from the injectors, is an integral design element of the chamber design, as the piston heads become part of the combustion chamber with direct injection.

"The high-tumble heads were developed with advanced modeling programs that helped us determine the optimal design in less time and with less trial and error," said Richard Bartlett, assistant chief engineer for the 3.6L engine. "Literally hundreds of simulations were performed to optimize the port flow, injector spray angle and pattern, and piston topology to produce a highly efficient yet powerful combustion chamber."

Large, 38.3-mm intake valves and 30.6-mm sodium-filled exhaust valves enable the engine to process tremendous airflow. In some conditions, the continuously variable valve timing system enables overlap conditions – when the intake and exhaust valves in a combustion chamber are briefly open at the same time – to promote airflow scavenging that helps spool the turbochargers quicker for faster boost production.

Hardened AR20 valve seat material on the exhaust side is used for its temperature robustness, while the heads are sealed to the block with multilayer-steel gaskets designed for the pressure of the turbocharging system.

As with the naturally aspirated 3.6L, the heads feature integral exhaust manifolds, although upper and lower water jackets were added to the heads to provide uniform temperature distribution and optimal heat rejection. On top of the heads, new aluminum cam covers enhance quietness and are designed with greater positive crankcase ventilation volume to support the turbo system.

Integrated charge air cooling

Another unique feature of the Cadillac Twin-Turbo is its efficient manner of processing the pressurized air charge through the cylinder heads and into the combustion chambers. A single, centrally located throttle body atop the engine controls the air charge from both turbochargers after the temperature is reduced in the intercooler. This efficient design fosters more immediate torque response, for a greater feeling of power on demand, and reduces complexity by eliminating the need for a pair of throttle bodies.

Using a pair of smaller turbochargers rather than a single, larger turbo also helps ensure immediate performance, because smaller turbochargers spool up – achieve boost-producing turbine speed – quicker to generate horsepower-building air pressure that is fed into the engine. The Cadillac Twin-Turbo's integrated charge air cooling system also contributes to its immediate response, because the compressors blow through very short pipes up to the intercooler.

With no circuitous heat-exchanger tubing, there is essentially no lag with the response of the turbochargers. In fact, airflow routing volume is reduced by 60 percent when compared with a conventional design that features a remotely mounted heat exchanger.

"It is a very short path from the turbos to the throttle body," said Bartlett. "The compressors draw their air directly from the inlet box and send their pressurized air through the intercooler basically immediately, giving the new CTS a tremendous feeling of power on demand."

The charge-cooling heat exchangers lower the air charge temperature by more than 130 degrees F (74 C), packing the combustion chambers with cooler, denser air for greater power. The twin-brick configuration of the heat exchangers is similar in design and function to the 6.2L supercharged "LSA" engine used on the current CTS-V Series.

"The LSA engine showed us the efficiencies of mounting the intercooler on top of the engine, especially when it came to packaging and maintaining a short, unobstructed path for the air charge," said Bartlett. "It's efficient and effective – and we wanted to build on that experience."

The air cooler system achieves more than 80 percent cooling efficiency with only about 1 psi (7 kPa) flow restriction at peak power, for fast torque production.

Vacuum-activated wastegates


Unique vacuum-actuated wastegates – one per turbocharger – and electronic vacuum-actuated recirculation valves are used with the 3.6L Twin-Turbo for better management of the engine's boost pressure and subsequent torque response for smoother, more consistent performance across the rpm band.

A wastegate is used to regulate the boost pressure of the engine. It provides a method to bypass the exhaust flow from the turbo's turbine wheel, which can be reintroduced into the exhaust stream – via a bypass tube – to maintain optimal turbine speed across the rpm band. Conventional wastegates are pressure-activated, allowing control of the actuator.

The Cadillac Twin-Turbo's vacuum-activated wastegate valves provide more consistent boost control, particularly at lower rpm, to enhance low-rpm torque, for a greater feeling of power at low speeds. They are independently controlled on each engine bank to balance the compressors' output to achieve more precise boost pressure response.

The wastegates also work in concert with the recirculation valves to eliminate co-surge from the turbos – a condition that can result in dynamic flow reversal, such as the moment immediately after the throttle closes. This overall system integration contributes to the engine's smoother, more consistent feeling of performance.

In addition to the vacuum-actuated wastegates and recirculation valves, the engine employs dual mass air flow sensors and an integral inlet air temperature/humidity sensor, a dual-compressor inlet pressure sensor and dual manifold pressure sensors.
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Re: 2014 CTS to get TT v6

Post by The Dark Side of Will »

Sweeeet setup.

DI + Turbo = Awesomesauce

I've been planning to drop an LLT + F40 into the Storm Trooper (Formula) for a while now... by the time I'm actually ready to do that, these monsters should be in junk yards.
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Re: 2014 CTS to get TT v6

Post by Shaun41178(2) »

I'll edit this later but wanted to give myself a little reminder. These cars are dynoing between 370-380 whp bone stock. Livernois tune only did about 440 whp and I think over 500 tq. I have dyno sheets I can add later.
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Re: 2014 CTS to get TT v6

Post by Shaun41178(2) »

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stock vs nothing but a canned tune that will be offered by Trifecta.
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Re: 2014 CTS to get TT v6

Post by Shaun41178(2) »

looks like a ats v on the ring. doesn't sound throaty like a v8 so curious if it is the tt v6. Looks good and even catches some air.

http://www.youtube.com/watch?v=901zz7T8p4s
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