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2020 Acura NSX Suspension Deep Dive

The Acura NSX has been a special car as long as I’ve been in the business. The first one came out in 1990, the same year I started my career in automotive engineering. I vividly remember driving one briefly back then when we brought one in for benchmarking. I'd drive it again 22 years later when my previous employer bought a used 1991 example for a long-term test. Reader interest was sky-high and the car was still gorgeous, but the march of time and automotive engineering had clearly left it behind. Then, in 2016, a second-generation NSX emerged, and it was packed with bleeding-edge thinking. It has a 3.5-liter twin-turbo V6, but this new NSX is a hybrid with an electric motor-generator sandwiched between the engine and its nine-speed DCT transmission. Two more electric motors – one for each wheel – power the front axle. There they can add traction, regenerate electricity under braking and dole out hyper-accurate levels of torque vectoring. The carÂ’s tire package was changed from Continental SportContact 5 to SportContact 6 tires in 2019, and numerous suspension re-tuning tweaks came along with them. The result is a lively and well-balanced car that is relentless when driven hard and a pussycat around town. LetÂ’s see what theyÂ’ve got going on under there.   At first glance the 2020 Acura NSX appears to have dual wishbone front suspension. But we canÂ’t tell for sure because that big two-piece brake rotor is in the way. The coil-over shock looks obvious, but a few odd details are apparent even from here.   This view also seems to indicate double wishbone suspension. But the pivot axis (green arrow) between the upper and lower ball joints looks wrong – itÂ’s far too vertical. WeÂ’re missing something. But I would be remiss if I failed to point out a few other things before we moved on. For one, the front drive axle confirms this to be an all-wheel-drive machine. Second, the forged aluminum damper mounting fork (yellow) that envelops the axle is mounted to the lower arm about 75% out from the armÂ’s inner pivot. The spring and damper motion ratio would be 0.75-to-1 relative to wheel movement, with a tiny reduction due to its lean angle. Lastly, just look at the huge cast aluminum upright (white). Beautiful. Normally these are called hub carriers or steering knuckles, and I use the terms interchangeably. But the motorsports-derived term upright is normally applied when the piece is tall and, well, upright like this one.   This explains everything.

Hondata's 2019 Acura RDX tune brings the mid-range torque

One of the big advantages to the era of turbo Hondas is that there's plenty of horsepower and torque left on the table for tuners to take advantage of. One of those companies is Hondata, and following its upgrades for the Civic and Accord, it's now tuning the Acura RDX luxury crossover. The RDX uses a turbocharged 2.0-liter engine similar to those in the Accord and the Civic Type R. In stock form, it makes 272 horsepower and 280 pound-feet of torque. With Hondata's Stage 1 tune, the company says that horsepower increases by about 10 across the rev band. Looking at the dyno graph, it also appears that peak horsepower increases by about 5 horsepower, and peak torque is up by about 15 pound-feet. Peak torque also appears to arrive sooner, and most of the torque curve seems to be up by 10 to 15 pound-feet. The increases in power and torque are available in all four of the RDX's drive modes. The Stage 2 tune increases power torque even more in Sport and Sport+ modes, and keeps Snow and Comfort modes at Stage 1 settings. Peak horsepower looks to be up about 10 over stock, but the mid-range sees as much as a 28-hp increase. Peak torque sees a huge jump of about 45 lb-ft over stock based on the dyno chart, and it's available even lower than the Stage 1's peak torque. If this all sounds good to you, you can order up a Hondata FlashPro computer for your RDX right now. It costs $695 and comes with the handheld computer for uploading or removing tunes. RDX owners in California should note that neither tune is currently CARB legal. Related Video:

UPDATE: 2021 Acura RDX PMC Edition price set

The 2021 RDX is the latest in Acura's lineup to get the PMC Edition treatment. This limited-run, hand-built model follows the TLX and MDX PMC Editions and be finished in the same Thermal Orange Pearl that was pioneered on the NSX.  Blessedly, the "PMC in PMC Edition doesn't stand for pumpkin-anything. Rather, it's shorthand for the facility where just 360 examples of this crossover will be hand-assembled: Acura's Performance Manufacturing Center — the home of the Acura NSX — on Honda's Marysville, Ohio, campus. Each PMC Edition arrives in Marysville as a "body in white," ready to assemble and receive the paint process normally reserved for the NSX. The PMC Edition will be equipped similarly to an RDX with the A-Spec and Advance packages, with one exception: Acura's Super-Handling All-Wheel Drive system will be standard.  Otherwise, the PMC Edition is mechanically identical to the RDX, whose A-Spec already boasts a sporty exterior treatment to boot. The PMC Edition jazzes that up even further with gloss black wheels, a body-color grille surround, black chrome exhaust finishers, a gloss-black roof, gloss-black side mirrors and gloss-back door handles.  Inside, the theme is essentially inverted, with the black leather upholstery, steering wheel and floor mats all getting orange contrast elements. Apart from the serial number placard on the center console, the rest of the PMC Edition's interior is identical to that of a standard RDX equipped with the aforementioned packages.  Acura says the RDX PMC Edition will be priced at $51,000, with customer deliveries starting in October — just in time for jack-o-lantern season. Made you work for that one, didn't we?