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2018 E63S w/ EuroCharged Tune: 0-60mph and 1/8th mile
These results come from a GPS timing device known as a Dragy which is steadily gaining a reputation for its accuracy (and unbelievable ease of use). Ambient temp was 49f and I was running 92 octane pump gas. The car has a lot better times in it than these since I experienced wheel-spin from launch and on the shift to 2nd. The only mods that affect performance are the EuroCharged tune (the PedalBox has no role here and isn't about enhancing ultimate performance anyway).
For those that are interested, I can't achieve these times by fully using the car's launch control because I find I pick shift points more optimally than it does. So, to launch, I use soft suspension (I'm lowered already so soft is relative), no traction control (I don't know if this makes any difference during a launch anyway), engine/tranny in "Stupid" mode, tranny in manual shift (doubtful this does anything during launch), mash both pedals as always, race start activates, release the brake, as soon as the car moves off of the line, I pull the left/downshift paddle which has no effect on the gear but cancels "launch control" leaving me free to decide when to shift which I try to do just above 6K RPMs... same for the remaining shifts.
49f; 92 octane pump gas
49f; 92 octane pump gas
I've yet to dragrace the car at the track but I will soon. I also haven't found anywhere suitably flat to try the 1/4 mile with the Dragy alone but I'm still looking.
6.95 1/8 mile is about 10.9-10.8 in the quarter... hauling ***.
Agreed... and nice work indeed by Jerry.
The 0-60 is the best she's got in her given the conditions (wheel spin in 1st and slight hop from the shift to 2nd) but the 1/8th mile should be faster than it is but that's my fault, I almost forgot to shift and left it too late which results in a slower shift and a loss of power since the power tails off just above 6K RPMs.
Agreed. Great numbers...and nice work by Jerry. Saw the insta post as well. Very strong
Absolutely... great stuff indeed.
This is on $h!tty 92 octane WA pump gas and having felt the difference between that and race gas (104 octane unleaded) in my RS7, I can only hope the tune knows how to 1) detect it and 2) take advantage of it. Jerry tells me it does but I'm skeptical until I try...
This is on $h!tty 92 octane WA pump gas and having felt the difference between that and race gas (104 octane unleaded) in my RS7, I can only hope the tune knows how to 1) detect it and 2) take advantage of it. Jerry tells me it does but I'm skeptical until I try...
If this is like his old W212 tunes it really does!! Expect 30plus HP to the wheels with race gas and no changes to the tune
If this is like his old W212 tunes it really does!! Expect 30plus HP to the wheels with race gas and no changes to the tune
That's great to hear. Any idea as to how long it takes to recognize the change; perhaps it's mileage related? I ask because I'd need to ensure that happens before lining her up...
Nice work; does that 0-60 allow for a 1 foot roll out?
Great question! It includes the traditional 1' rollout for distance testing, not for acceleration/speed tests... so, no, not for the 0-60 but yes for the 1/8th.
That's great to hear. Any idea as to how long it takes to recognize the change; perhaps it's mileage related? I ask because I'd need to ensure that happens before lining her up...
I do not know about mileage being a factor in recognition. However, I am sure # of WOT runs speeds up the process tremendously. By the 3rd or so WOT run, the car should be responding to the gas quite a bit.
On another tune (Renntech), I put 5 gallons of 104 Octane in just under half tank of gas while the car was still strapped to the dyno. Drove for 3-4 minutes(on the dyno), did a few pulls. First pull, the car lost power compared to the pull right before race gas. By the 3rd pull, there was about 20RWHP gain overall.
I know the Eurocharged tunes are way more aggressive than the Renntech tune on the W212s. And the time I put a little race gas in the car resulting in harder pulls and no knocks (Chevron 93 in particular knocks on my car) by the 3rd pull
The GPS capabilities of phones and phone-apps are designed for general location and navigation purposes and they tend to fall well-short of the geo-positioning accuracy needed to time acceleration and distance... or no if you prefer the short answer.
The GPS capabilities of phones and phone-apps are designed for general location and navigation purposes and they tend to fall well-short of the geo-positioning accuracy needed to time acceleration and distance... or no if you prefer the short answer.
You should know more about this device(Dragy), then do the evaluation, this equipment does not have one foot. it's more accurate than vbox
You should know more about this device(Dragy), then do the evaluation, this equipment does not have one foot. it's more accurate than vbox
Try passing a comment or cite an opposing opinion backed by reasoning instead of an empty accusation--polite conversation and answers often ensue. My gut response to your wording choice isn't polite.
That said: show your cards. I got this data straight from the horse's mouth. Sure, anyone can be wrong--even the apparent product developer. For clarity, I'm under the impression--from what I thought/think was the most credible of sources--that the Dragy does NOT employ rollout on speed trials but it does on distance. Now, what's your source or is it just an empty opinion?
PS: it is more accurate than the Vbox in most respects; on that we agree (60ft not being one of its strong points).
Last edited by limeypride; 04-20-2018 at 12:21 AM.
Try passing a comment or cite an opposing opinion backed by reasoning instead of an empty accusation--polite conversation and answers often ensue. My gut response to your wording choice isn't polite.
That said: show your cards. I got this data straight from the horse's mouth. Sure, anyone can be wrong--even the apparent product developer. For clarity, I'm under the impression--from what I thought/think was the most credible of sources--that the Dragy does NOT employ rollout on speed trials but it does on distance. Now, what's your source or is it just an empty opinion?
PS: it is more accurate than the Vbox in most respects; on that we agree (60ft not being one of its strong points).
Never knew about the Dragy. Cool tool! Bought one and had it delivered today.
Never knew about the Dragy. Cool tool! Bought one and had it delivered today.
I love it. It's a tiny little black box that mounts magnetically so it happens to stick automatically to the top grille on the E63 dash without any assistance. I leave mine there permanently.
It has no buttons; no on/off switch--you simply pair with it from your phone and load the app. I've used it once or twice a day for about 30 mins each time and it's still at 40% power after 7+ days.
The leaderboard is also good fun.
Accuracy-wise: we compared it to the track timing and speed equipment at PBIR and to the two popular Vbox models and it was within 0.01 of the time and performed similarly for trap speed. Only its 60-ft measurement is questionably accurate.
I'm really surprised that they can get that kind of (claimed) accuracy out of GPS given the small time sample size.
You're basically measuring the time difference of arrival of signals from multiple satellites orbiting at an altitude of about 20,200 km and solving a complex set of 3-dimensional trig problems multiple times per second. My various GPS nav devices I use for off roading and what not do much better now that selective availability is turned off, but less than one foot accuracy is not common. Typically takes multiple average over a period of time much longer than 0 to 60 MPH in the E63S
I'm really surprised that they can get that kind of (claimed) accuracy out of GPS given the small time sample size.
You're basically measuring the time difference of arrival of signals from multiple satellites orbiting at an altitude of about 20,200 km and solving a complex set of 3-dimensional trig problems multiple times per second. My various GPS nav devices I use for off roading and what not do much better now that selective availability is turned off, but less than one foot accuracy is not common. Typically takes multiple average over a period of time much longer than 0 to 60 MPH in the E63S
Yup, understood. This isn't really an area I'm interested in or technically-savvy in beyond my hobbyist use cases so take this with a pinch of salt: based on what I've read, the challenges you cite seem to be considered as "solved"--that's a good chunk of inference on my part, though. RaceLogic pioneered (or eventually took over) this fairly niche market and their devices have been considered "accurate enough" for speed and distance performance testing for quite some time. Base on what I've read, it seems to boil down to the frequency (wider bandwidth) and sampling rate of these devices, as well as the number of sats they use, all of which are far higher than traditional navigation GPS. The Dragy is no different except that it's bringing 10-year old devices kicking and screaming into the realm of social media and hand-held smartphones--good on 'em I say!
There are factors that affect positional accuracy and results can vary widely depending on circumstances. Speed accuracy however is much better at <= 0.006 m/s over any 3 second period. So, if the unit reports you're doing 60 MPH (26.8224 m/s) you might actually be doing 59.9866 MPH or 60.0134 MPH. Most of us could live with that level of uncertainty
For timing 60 ft times the positional uncertainty could result some significant error in ET, but not so much for 1/4 mile times. Let's say you're doing 124 MPH at the end of the 1/4 mile. That's 55.433 m/s. If the determination of the finish line is off by 7.8 m, then it's going to report an ET off by roughly 0.14 s. Again, for hobby use, probably not a problem.
There are factors that affect positional accuracy and results can vary widely depending on circumstances. Speed accuracy however is much better at <= 0.006 m/s over any 3 second period. So, if the unit reports you're doing 60 MPH (26.8224 m/s) you might actually be doing 59.9866 MPH or 60.0134 MPH. Most of us could live with that level of uncertainty
For timing 60 ft times the positional uncertainty could result some significant error in ET, but not so much for 1/4 mile times. Let's say you're doing 124 MPH at the end of the 1/4 mile. That's 55.433 m/s. If the determination of the finish line is off by 7.8 m, then it's going to report an ET off by roughly 0.14 s. Again, for hobby use, probably not a problem.
That's cool to understand... thanks! I think it's fair to say you might know a bit more about this than me
Most of us use the Dragy as a ballpark indicator but, mostly, for measuring relative improvements as changes are made (and the fun-factor of being on the leaderboard). That said, it nailed the times at the track so its credibility has shot up with me.
04-17-2018, 05:23 PM
