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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.

Acura recalling 19.5K cars over automatic braking problem

Acura is recalling 19,502 vehicles to fix a software issue with their Collision Mitigation Braking System on the 2014-2015 MDX and RLX, plus the 2014 RLX Sport Hybrid. According to the National Highway Traffic Safety Administration the technology can falsely interpret things like metal fences and guardrails along the side of the road as obstacles and unexpectedly apply "emergency braking force." Obviously, that would be rather disconcerting while driving. Number of Auto Recalls by Model Year | AxleGeeks According to the detailed documents from NHTSA, the first account of this happening came from Japan in November 2013, and that vehicle was rear-ended when the system suddenly braked. Another incident was identified there in June 2014. However, there have been no reports of this happening in the US. The fix is quite simple, though and just requires a software update for the system. Affected owners will be notified by mail, and the repair will be done at no charge. Related Video: RECALL Subject : Activation of Collision Mitigation Braking System Report Receipt Date: MAY 20, 2015 NHTSA Campaign Number: 15V301000 Component(s): FORWARD COLLISION AVOIDANCE Potential Number of Units Affected: 19,502 All Products Associated with this Recall Vehicle Make Model Model Year(s) ACURA MDX 2014-2015 ACURA RLX 2014-2015 ACURA RLX HYBRID 2014 Details Manufacturer: Honda (American Honda Motor Co.) SUMMARY: Honda (American Honda Motor Co.) is recalling certain model year 2014-2015 Acura MDX 2WD and AWD, RLX and 2014 Acura RLX Hybrid vehicles. In certain driving conditions, the Collision Mitigation Braking System (CMBS) may incorrectly interpret certain roadside objects such as metal fences or metal guardrails as obstacles and unexpectedly apply the brakes. CONSEQUENCE: If the CMBS unexpectedly applies emergency braking force while driving, there is an increased risk of a crash. REMEDY: Honda will notify owners, and dealers will update the CMBS software, free of charge. The manufacturer has not yet provided a notification schedule. Owners may contact Acura customer service at 1-800-382-2238. Honda's numbers for this recall is JQ4, JQ5 and JQ6. NOTES: Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

Cody Loveland's Corvette-powered NSX claimed by Pikes Peak

Let there be no doubt - racing automobiles can be very dangerous. This unfortunate fact of life has been proven once again today by Cody Loveland, owner of LoveFab, who crashed his Corvette-powered tube-frame Acura NSX on the second turn of the Pikes Peak hill climb course, apparently after a rear upper control arm failed. Cody hit a wall of boulders at high speed, after which the racecar caught fire.
Cody was able to escape the blaze unhurt - minus some missing hair that was singed off in the fire - but the car appears to be a complete mess, as you can see from the image above. The LoveFab Motorsports team has vowed to do its very best to rebuilt the car in time for the competition, but we'd be awfully surprised (and impressed) if that burnt-up hulk were ready for racing with just a few days to rebuild.
We're happy to hear that Cody got away safely, and here's hoping the rest of the competitors get up the hill without incident, or, like Cody, are at least able to walk away uninjured if they don't.