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Maxwell RHEV Prototype First Drive Review | More than meets the eye

The Maxwell RHEV looks just like any small business' panel van, sporting large vinyl graphics and unassuming steel wheels. You'd have no idea that the co-founders of the startup based out of Seattle had grafted a salvaged Voltec powertrain from a junkyard Chevy Volt into this Ram ProMaster. Somewhere, a battery pack lurks. Maxwell's co-founders, CEO Max Pfeiffer and engineer Trey Camp, open the cargo area to reveal a completely unaltered space. Both are ex-Tesla employees with a long fascination for the #vanlife movement – that their interests intersected in a hybrid cargo van isn't surprising once you start talking to them. This is their first vehicle, a salvaged ProMaster sidelined with a blown 3.6-liter Pentastar, and it's both their prototype and the only Maxwell in existence right now. That said, the company is building a low-roof version for a customer, which will be lighter, have less aero drag and therefore be more efficient. The company is just emerging from a stealth startup mode, and while their backstory is fascinating, I'm still wondering where the Volt's 18.4 kWh battery pack is. "There's nothing in the back ... we're able to get the battery underneath the floor, in the center," Pfeiffer says. Ducking my head under the side reveals, sure enough, a little underside blister that contains the battery, tucked up neatly. The other changes to the RHEV – short for Range-extended Hybrid Electric Vehicle – are minimal. He pops the hood. There are some rough edges, but the 1.5-liter, 101-horsepower engine and 48-kW motor fit comfortably on custom engine mounts and with re-routed exhaust, behind a fascia that improves aero and houses the charge port. Custom axles send power to unaltered Ram hubs and brakes. "This version, it's a little bit prototype-y," Pfeiffer says. "We've had more time to work with the CAD [computer-aided design, engineering drawings] we were able to get from GM and Chrysler, and we've done a better job packaging for production." GM already spent billions on the Voltec and its controlling software, and Maxwell can happily ride those coattails. Despite the help GM has lent Maxwell, there are no official ties. An emulator sends spoofed signals to the Ram instruments, which have a new custom-printed face. The Ram's body control module is left alone. For powertrain faults, Maxwell says the vehicle can theoretically be serviced by any Chevy dealer, and any issue with the rest of the vehicle can be handled by a Ram service shop.

Submit your questions for Autoblog Podcast #321 LIVE!

We're set to record Autoblog Podcast #321 tonight, and you can drop us your questions and comments regarding the rest of the week's news via our Q&A module below. Subscribe to the Autoblog Podcast in iTunes if you haven't already done so, and if you want to take it all in live, tune in to our UStream (audio only) channel at 10:00 PM Eastern tonight.
Discussion Topics for Autoblog Podcast Episode #321
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2013 Ram 1500 tows away Motor Trend Truck of the Year laurels

Motor Trend has named their 2013 Truck of the Year, and this time, the coveted honor goes to Chrysler's 2013 Ram 1500. The Ram unseats the Ford F-150 pickup from Truck of the Year with a package that the magazine argues fulfills owners' needs for everyday usability as much as worksite utility.
MT points out that the 1500's available air suspension is a quantum leap in the light-duty pickup segment. This system can raise for more ground clearance or lower for highway driving. Chrysler has been pushing for friendly daily-driver manners for some time now - you'll recall it debuted coils in place of rear leaf springs in the 2009 Ram 1500, back when it the truck was sold under the Dodge nameplate. The new optional air setup is another step towards more comfortable everyday driving.
The Ram 1500 can also be paired with the company's 3.6-liter Pentastar V6 in place of the loveless 3.7-liter unit, in the process getting some pretty surprising fuel economy figures. MT also notes that the interior update - complete with available Uconnect 8.3-inch screen and new rotary shifter - is a welcome upgrade. These attributes have conspired to yield a deserving award for Team Ram, which MT says has nailed the motivations of light-duty truck buyers - comfort and capability in one package.