The Porsche 911 Vonnen Hybrid Conversion Channels the 911's Future

With the learning that Porsche has prepared a half and half variation into the item plan of the latest 992-generation Porsche 911, the electrical whimper and extra forward push delivered by this changed 991-period 911 Carrera gives a tempting look into what's to come. This is the impact of the Vonnen Shadow Drive (VSD), a secondary selling half breed transformation planned by Vonnen Performance that, if you can legitimize the not-unimportant expense, coordinates a battery and an electric engine into Zuffenhausen's games vehicle years before the manufacturing plant gets around to it.

Insert Power Unit Here

The Shadow Drive is a cunning setup that means 150 pull and 150 lb-ft of torque to the crankshaft of a 911's inward burning motor, yet without altogether messing with Porsche's motor PC nor too much adding to the vehicle's check weight. The framework itself weighs 210 pounds and incorporates an electric engine generator sandwiched between the motor and transaxle; a power inverter mounted over the motor; and a control unit and a little 1.0-kWh lithium-based battery pack in the front trunk. Be that as it may, the net increase is nearer to just 170 pounds, on account of the evacuation of the motor's flywheel and starter engine, just as the utilization of a littler helper 12-volt battery to control frill. Given the situation of the engine generator unit, the framework can collect vitality and energize the battery both from the gas motor and amid braking.


Vonnen president Chuck Moreland says the framework's relative straightforwardness is essential to keeping up the respectability of the vehicle and its driving knowledge—a key selling point for Porsche proprietors. In contrast to most half breed frameworks, initiating the Shadow Drive's electric lift is exclusively up to the driver's attentiveness. Getting to the framework occurs through a Bluetooth-connected cell phone application, which on our test vehicle included selectable Street, Track, and Overboost drive modes, just as a change to close the framework down completely, restoring the vehicle to close stock structure. Likewise included are constant framework observing, information logging, and the capacity to impart that data to the cloud. In a telling sign that the Santa Clara, California-based Vonnen works with the fast moving attitude of a startup, we're informed that the application's Track mode will before long be renamed Sport, and that the setup of this early interface likely will be redone in a couple of months. Indeed, even now, last tuning of the drive framework itself and how its electrons are conveyed are as yet being changed.

Tuning the Thrust

Whenever new, the 2013 911 Carrera that we're driving utilized 350 steeds and 287 lb-ft of torque from its 3.4-liter level six, which in our testing was sufficient to get a comparative 2014 model to 60 mph in 4.2 seconds with the standard seven-speed manual. Trim a couple of tenths from that figure with the discretionary seven-speed double grip PDK programmed in our cross breed test vehicle, the electronic cerebrum of which Vonnen updates to apply more grounded grasp strain to all the more likely deal with the expanded dimension of torque. Manual-outfitted vehicles manage with just a mechanical acclimation to the grasp. The Porsche's guiding and undercarriage balance are radiant as we pull off of Pacific Coast Highway and head into the mountains above Malibu, yet it's the VSD's improved increasing speed we truly need to check. We begin off in Street mode, which Bill Davis—Vonnen's VP of designing and our co-pilot for the drive—says screens motor speed and driver contributions to easily nourish in the electric lift at part throttle. "It feels like you're essentially driving a greater engined vehicle."


Game mode is more forceful in its capacity conveyance, yet, as in the Street setting, it releases just 60 to 70 percent of the VSD's potential juice. Propelling this mixture 911 at first feels and sounds equivalent to when it left the plant, yet soon an articulated electrical whimper overwhelms the lodge as the electric engine kicks in, joined by the vibe of additional push as though a couple of turbos have in a flash spooled up. It's here that we hit the framework's warm point of confinement out of the blue. Among the cell phone application's presentations are a battery charge pointer and temperature readouts for the battery, e-engine, and inverter. The framework has a warm breaking point of 302 degrees Fahrenheit, past which it briefly closes down to cool. Contingent upon how hard you're driving, this can happen every now and again, yet the cooling likewise happens immediately, frequently in under a moment or something like that. "We're altering the cooling too," Davis says, "so a creation variant of this in only two or three months will most likely be pushed further and recoup considerably more rapidly." 

Changing to Overboost mode uncorks the majority of the VSD's capacity and "turns the dial up to 11," as per Davis. What's more, for sure, questions in our mirrors vanish definitely more quickly than before as we're pushed into the 911's seats with perceptibly more prominent power. While we can't completely evaluate how much speedier the half and half vehicle is over stock until we get one to the test track, our mini-computers state this precedent likely can obscure 60 mph in about 3.6 seconds. We wrap up our drive by killing the framework, which serves to recalibrate our faculties. Whenever dynamic, the VSD always produces a low-recurrence electrical whimper, which gets more intense and progressively forceful as speeding up escalates. With it killed, the 911 loses quite a bit of its newly discovered dramatization, the lodge is perceptibly calmer, and its speeding up nearly appears laggy without the close quick flood of electric torque.


The Catch

 The most significant number in the Vonnen Shadow Drive's specifications is its price—$75,000, including installation at Vonnen's shop—which, depending on what corner of the Porsche universe you're coming from, can make a big difference in the conversion's worth. VSD is compatible with both manual and automatic transmissions, as well as naturally aspirated and forced-induction engines, both stock and modified. Initial applications are limited to the 991-series 911 (2012 to 2019 model years), with fitments for the 981-generation Cayman and Boxster available in a couple of months. Compatibility with older 997- and 996-era 911s will follow shortly thereafter, with applications for other Boxster and Cayman models and classic air-cooled 911s coming a few months after that. It’s here where the VSD’s sticker price can perhaps be most justified.

While the Shadow Drive can be viewed as a curiosity add-on for well-obeyed Porschephiles, it is a real execution overhaul in front of the processing plant's very own improvement bend. For more current 911 proprietors only needing a lift in power, exchanging up to a Turbo model would carry out the responsibility in a fundamentally more straightforward and more affordable way. In any case, while considering the less-incredible Boxster and Cayman models, and particularly the more seasoned 911 ages, the case ends up more grounded. "At the point when these vehicles initially turned out, they were quick for their time and had adequate power," says Vonnen's Moreland. "Be that as it may, those figures look out and out moderate and frail by the present principles." For a contributed devotee looking for current dimensions of intensity from a great 911 without definitely changing the vehicle's straightforward, air-cooled character—and who is happy to grasp current innovation—the expense of the VSD update may really bode well.


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