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Performance, Tuning, and (LEGAL) RacingPost discussions about increasing performance, capabilities, and racing.
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How does it compare to phone/tablet apps such as torque?
I'm also about 2 hrs away from a nearest drag strips so would be nice to go off something reliably accurate.
Phones or tablets are horrible the GPS only updates at 1 Hz nowhere close to get accurate reading, you need 10Hz minimum. The VBox I have does 20Hz. Not sure about he Dragy...I'll have to look up the specs.
Edit: It does 10...Same as the standalone VBox....Very good.
With these kinds of tools too you can actually see where the shifts occur when during acceleration. The 10R80 shifts pretty quick, just way too soon with the Whipple tune. I need to sometime run my 6-speed Corvette, I'll bet the shifts will be much more obvious. Especially with me at the wheel.
BadCon...What tune are you running and what RPM is your transmission shifting at?
I'm pretty sure Torque Pro app reads both GPS and the trucks own computer speed readout. It does display separate MPH and GPS MPH. And can read GPS speed without the adapter connection. The 0-60 times I have from TPro are very close to the datalogs I have. But yes most GPS units lag too much to be useful for acceleration times. KM
I'm pretty sure Torque Pro app reads both GPS and the trucks own computer speed readout. It does display separate MPH and GPS MPH. And can read GPS speed without the adapter connection. The 0-60 times I have from TPro are very close to the datalogs I have. But yes most GPS units lag too much to be useful for acceleration times. KM
The problem with reading vehicle speed from the truck is it can be thrown off if your speedo calibration is not correct and or if there are traction issues.
With these kinds of tools too you can actually see where the shifts occur when during acceleration. The 10R80 shifts pretty quick, just way too soon with the Whipple tune. I need to sometime run my 6-speed Corvette, I'll bet the shifts will be much more obvious. Especially with me at the wheel.
BadCon...What tune are you running and what RPM is your transmission shifting at?
Mike
The shifts on my 6r80 are not nearly as smooth as your 10r80 lol, you can much more easily see the shift points on my gforce graph. My truck was tuned by Matt at ID Motorsports, just a stock Roush stage 2 with his tune. On paper the shift points are 1st-7500, 2nd-7500 (2nd actually shifts near 7700rpm), 3 and higher 7000, with Matt's reasoning being "heat." The truck hits the 1/4th finish right at the 3-4 shift, and If I ever go back to Matt for a retune I'm gonna have him raise the 3rd gear shift RPM to 7250rpm, as that will carry me past the finish before the shift. Maybe that'll be an extra 1 mph on trap speed...I dunno, but I'd really like to trap 120mph, but I don't think I have the power for that. I still haven't taken this thing to a drag strip, and I'd like to try my luck on a prepped surface.
I'm pretty sure Torque Pro app reads both GPS and the trucks own computer speed readout. It does display separate MPH and GPS MPH. And can read GPS speed without the adapter connection. The 0-60 times I have from TPro are very close to the datalogs I have. But yes most GPS units lag too much to be useful for acceleration times. KM
I have Torque Pro and its not consistently as accurate as a high quality GPS performance meter, and it simply doesn't have the GPS resolution to make it comparable to a time slip. I've watched Vbox and Dragy runs that occurred on drag strips and the GPS devices were comparable to the drag slip time slip to the 100th of a second, with the biggest variables occurring in the 60ft due to the short distance this is calculated over.
I don't think I mentioned it earlier in the thread, but one of the coolest features of the Dragy is their leaderboards, where you can upload your validated runs and directly compare them to other Dragy users. This has been fun, especially when looking for cars that I have on my hit list like SRT Jeep Cherokee's and even Hellcats. About the only thing the Dragy doesn't tell you is anything about the weather such as air density.
The shifts on my 6r80 are not nearly as smooth as your 10r80 lol, you can much more easily see the shift points on my gforce graph. My truck was tuned by Matt at ID Motorsports, just a stock Roush stage 2 with his tune. On paper the shift points are 1st-7500, 2nd-7500 (2nd actually shifts near 7700rpm), 3 and higher 7000, with Matt's reasoning being "heat." The truck hits the 1/4th finish right at the 3-4 shift, and If I ever go back to Matt for a retune I'm gonna have him raise the 3rd gear shift RPM to 7250rpm, as that will carry me past the finish before the shift. Maybe that'll be an extra 1 mph on trap speed...I dunno, but I'd really like to trap 120mph, but I don't think I have the power for that. I still haven't taken this thing to a drag strip, and I'd like to try my luck on a prepped surface.
Thanks! The Whipple's tune has the shift points CRAZY WAY LOW, 6250 RPM, It's has to go, I just don't see a point when there is snow on the ground.
I have Torque Pro and its not consistently as accurate as a high quality GPS performance meter, and it simply doesn't have the GPS resolution to make it comparable to a time slip. I've watched Vbox and Dragy runs that occurred on drag strips and the GPS devices were comparable to the drag slip time slip to the 100th of a second, with the biggest variables occurring in the 60ft due to the short distance this is calculated over.
I don't think I mentioned it earlier in the thread, but one of the coolest features of the Dragy is their leaderboards, where you can upload your validated runs and directly compare them to other Dragy users. This has been fun, especially when looking for cars that I have on my hit list like SRT Jeep Cherokee's and even Hellcats. About the only thing the Dragy doesn't tell you is anything about the weather such as air density.
That is cool feature as long as it doesn't record actual GPS location in the cloud, I'm not a privacy freak. That's just a little more then I think I would want shared or accessible. Perhaps is has a Mexico mode?
That is cool feature as long as it doesn't record actual GPS location in the cloud, I'm not a privacy freak. That's just a little more then I think I would want shared or accessible. Perhaps is has a Mexico mode?
Mike
locations are not recorded, but you can put a location in your profile or add one to the comments on the individual run. Obviously a person should not be too specific for fear of running into the law, but my run was in Mexico...
As for the stock Whipple tune, the stock Roush shift points are 6000rpm for stage 1, and 6500rpm for stage 2, with the factory speed limiter in place.
Put it in perspective, a stock Roush stage 2 truck will be lucky to run a 13 flat. I’ve shaved almost 1.5 seconds off the 1/4th with nothing but a tune. I know you Whipple guys are in the same boat with the stock tune, and it amazes me how much performance they leave on the table. I guess that warranty coverage is a big fear, but a 2nd or 3rd gen coyote will spin 7500rpm all day long.
01-10-2019, 09:44 AM
