The June 2011 issue of Motor Trend (or some other major car magazine) has a list of cars that launch at over 1g.
They also corner at over 1g.
aqn wrote:If this document is to be believed, the LEAF's motor makes ts max torque of 206 ft-lbs from 0-2730 rpm and max power of 107 bhp from 2730-9800 rpm.
Nissan is a killjoy.ttweed wrote:IMHO, that document shows the raw specs of the motor before Nissan applies their ECU, BMS, and "drive by wire" throttle controls to the motor's output. There is no way that they would allow the engine to apply full power instantly to the wheels from a standing start[...]
aqn wrote:I still say that the LEAF feels quick off the line because it is quick off the line. I went looking for dyno graphs, but could not find any that show readings below 2000 or 2500 rpm, but many "performance cars" shows around the same torque at 2000+ rpm:
Of course; no argument from me on that.ttweed wrote:[snipped examples]
Yes, it is true that ICE engines do not develop max torque at low RPMs. This does NOT mean that they cannot launch quickly off the line. The clutch and gearing and driver skill can be combined to make sure that the car is never out of the meaty part of the powerband,[...]
It's lacking something, but so far I don't think it's grip that's lacking, at least not where launching hard is concerned. If grip was that lacking, I'd have lit up the tires a whole lot more frequently. I think I've done that only once.ttweed wrote:The most important aspect in accelerating a vehicle is grip, and the Leaf is sorely lacking in this part of the equation, [...]
You think?ttweed wrote:[...] regardless of how much torque it may have available. The tires are the single most important factor in acceleration performance (and braking and cornering as well). If the coefficient of friction of the tire contact patch is not sufficient to transfer the power to the ground, it doesn't matter how much power is applied. With the wider, softer compound tires that are standard equipment on a modern sports car, and a skilled driver (or modern launch control software), any of the performance vehicles you cite will absolutely smoke a Leaf off the line,
How about in the first 10 feet? Maybe even the first twenty five feet? Afterall, if I ever really need to get in front of somebody, all I would need is about two car lengths, maybe forty feet max. Ditto if I ever feel like annoying the pilot of a "performance car"!ttweed wrote:no matter how "quick" it may feel. The stopwatch doesn't lie. Despite the anemic 175 ft-lbs @ 2250rpm, a new GT3 RS (there is no 911 GT4 yet, BTW) will do 0-60mph in 3.5 seconds (without launch control). There is no way the Leaf could stay with it, even to 20-30 mph.
TT
That's what I eventually want to see, some videos, or at least reports of short range acceleration of the LEAF vs a few of the commonly seen, decent performing (i.e. 0-60 in7 seconds or so) consumer cars. After reading the responses here, the take home message for me is that the LEAF easily and effortlessly gets itself going quickly in the hands of an average driver, while a commonplace ICE demands more from a driver to match that same low speed acceleration.aqn wrote:
I was next to a late-model Range Rover that appeared like it wanted to "race" (don't ask me why anybody would want to race a LEAF!).
Unless, of course, the Nissan engineers intentionally moderated the torque application from the engine to ramp up in full throttle application at exactly the rate that the stock tires can put power to the ground without slipping too much in dry conditions, which is what I believe they did.aqn wrote:It's lacking something, but so far I don't think it's grip that's lacking, at least not where launching hard is concerned. If grip was that lacking, I'd have lit up the tires a whole lot more frequently.
The hole shot is mostly a matter of reaction time. You've got a good chance with anyone who isn't expecting it.aqn wrote: How about in the first 10 feet? Maybe even the first twenty five feet?
+1ttweed wrote:...It can be a stealthy little beast from stoplight to stoplight in the city, even for an unskilled driver, but beyond the first block, it's just another econobox, albeit a very quiet one...
When wife was shopping for her smart ED replacement last year we took out a 2019 SV plus. Quite a bit faster than my 2016 SV and her smart ED. I’m not sure I would say twice as fast but a marked difference.DougWantsALeaf wrote: ↑Tue May 05, 2020 5:44 amFrom a rolling start, my 19 SV Plus feels very fast.
I had a similar experience with our SL Plus with a late model X5. Wasn't really paying attention, hopped on it a bit just for fun, and then heard this engine roaring to my right... I hit the brakes to let him in, since he was running out of room. No contest. It's quite fast.