Harry's Lap Timer Pro

Zxces50 · 05-04-2012, 08:17 PM

Great IPhone App - fully automatic video- hands off

Watkins Glens

370Z Watkins Glen Fast Lap.mp4 - YouTube

sixpax · 05-04-2012, 08:22 PM

wow that's pretty cool. great video.

Mike · 05-04-2012, 08:29 PM

thats neat, I have to check into it!

cossie1600 · 05-05-2012, 02:09 AM

How does it pick up RPM and throttle position, is it by speed and g-force only?

Zxces50 · 05-05-2012, 06:21 AM

I bought two accesories to go with Harry's IPhone App
1.emprum UltiMate GPS 5kz- for improved positioning accuracy at speed ~$90
2. PLX Devices OBDII Wi-Fi-~$150 plugs into OBDII port- exports tons of data to IPhone- speed, throttle, MAF, RPM.....you can print out an enitre spreadsheet of data
Great track feedback. Had been looking at other more expensive stuff but i always wanted to spend that type of cash on track day first- for the handful of times I go this is a great low cost option that is feature rich. All HANDS FREE- set in paddock and it automatically starts video when you cross start stop at speed

Zxces50 · 05-05-2012, 06:25 AM

Another session on track

370Z Watkins Glen Roush Mustang.mpg - YouTube

sixpax · 05-05-2012, 06:29 AM

Quote:

Originally Posted by Zxces50

I bought two accesories to go with Harry's IPhone App
1.emprum UltiMate GPS 5kz- for improved positioning accuracy at speed ~$90
2. PLX Devices OBDII Wi-Fi-~$150 plugs into OBDII port- exports tons of data to IPhone- speed, throttle, MAF, RPM.....you can print out an enitre spreadsheet of data
Great track feedback. Had been looking at other more expensive stuff but i always wanted to spend that type of cash on track day first- for the handful of times I go this is a great low cost option that is feature rich. All HANDS FREE- set in paddock and it automatically starts video when you cross start stop at speed

very cool stuff...

I used my IPhone and a cheapie app (price wise) called Track Addict HD I downloaded for 5 bucks recently. It has PLX and ODBII functionality as well but I didn't use it. I made the mount for like 10 bucks.

While mine is functional and serves it's purpose, it pales in comparison to your set up and output. Very nice !

sixpax · 05-05-2012, 06:39 AM

...also would love to see your mounting solution for the IPhone.

Zxces50 · 05-05-2012, 07:53 AM

Simple suction cup/ aligator clip mount on windsheild- I modified slightly by wrapping pipe insulation and some electrical tape to stiffen up mount and take out shake- it is pretty stable

cossie1600 · 05-05-2012, 12:35 PM

The OBDII output seems a little bit off, is it a phone problem or software issue or the obdII issue?

Zxces50 · 05-05-2012, 02:14 PM

The software has a adjustable delay setting on OBDII data- it is presently set at 1 second (default) This is my first use so left alone- I assume to do some buffering of data- in advanced settings you can go to 0 - I will probably set at 0.5 when I go to NJMP at the end of May

wstar · 05-05-2012, 05:46 PM

Yeah that, IMHO, is the main problem with any iPhone-based solution: your data has to come over wifi, and so the latency and sync on that has to be fixed somehow. The equivalent Android-based setups use Bluetooth to talk to the OBD-II (and GPS), and the data's pretty decently synced already just because there's not much latency to begin with.

Harry's should be able to export vid+obd+gps data to RaceRender 2 Video Processor as well, and then you can render with a nice custom layout, and RR2 makes it easy to fix sync issues as well.

Another random thing you may have noticed: Harry's is probably using the standard "Throttle Position" OBD-II code, which is actually unrelated to gas pedal position on our car (it reflects butterflies + VVEL info). There actually is a non-proprietary code for Accel Pedal Pos which would be more-useful on our cars. I can see it in any OBD-II app for the Android, except for my Harry's-equivalent (aLapRecorder) which uses the bad "Throttle" like Harry's does.

cossie1600 · 05-05-2012, 06:23 PM

All the phone based solutions have a 5hz limit too. The more expensive true dataloggers have 10hz

wstar · 05-05-2012, 06:47 PM

I've been comparing some of the more expensive solutions for a while now off and on. IMHO, for road race type stuff with decent video and data, I now lean towards RaceKeeper. It's just that for the cash I'd spend on the core unit + accessories and the time to install... there's a lot of other items on the backlog for the car that take precedence

sixpax · 05-05-2012, 06:55 PM

It might seem simple to a lot of you professional drivers with tons of track time ... But for a noob like me just starting out I think I can still learn a lot from an inexpensive, slow, slightly out of sync application. Still provides valuable feedback.

05-04-2012, 08:17 PM	#1 (permalink)
Zxces50 Base Member Join Date: Jan 2009 Location: Boston, MA Posts: 208 Drives: 15 C7 Stingray Z51 Rep Power: 16	Harry's Lap Timer Pro Great IPhone App - fully automatic video- hands off Watkins Glens 370Z Watkins Glen Fast Lap.mp4 - YouTube

05-04-2012, 08:29 PM	#3 (permalink)
Mike The370Z.com Sponsor Join Date: Jun 2009 Location: Loganville, GA Posts: 5,944 Drives: 370z Rep Power: 2186	thats neat, I have to check into it! __________________ NISSAN: 75 280Z / 86 300ZX GLL /87 Sentra SE / 03 350Z / 23 Z Porsche: 93 968 / 23 Macan GTS / 93 968

05-05-2012, 05:46 PM	#12 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3594	Yeah that, IMHO, is the main problem with any iPhone-based solution: your data has to come over wifi, and so the latency and sync on that has to be fixed somehow. The equivalent Android-based setups use Bluetooth to talk to the OBD-II (and GPS), and the data's pretty decently synced already just because there's not much latency to begin with. Harry's should be able to export vid+obd+gps data to RaceRender 2 Video Processor as well, and then you can render with a nice custom layout, and RR2 makes it easy to fix sync issues as well. Another random thing you may have noticed: Harry's is probably using the standard "Throttle Position" OBD-II code, which is actually unrelated to gas pedal position on our car (it reflects butterflies + VVEL info). There actually is a non-proprietary code for Accel Pedal Pos which would be more-useful on our cars. I can see it in any OBD-II app for the Android, except for my Harry's-equivalent (aLapRecorder) which uses the bad "Throttle" like Harry's does. __________________ 7AT Track Car! Journal thread / Car setup details

05-05-2012, 06:47 PM	#14 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3594	I've been comparing some of the more expensive solutions for a while now off and on. IMHO, for road race type stuff with decent video and data, I now lean towards RaceKeeper. It's just that for the cash I'd spend on the core unit + accessories and the time to install... there's a lot of other items on the backlog for the car that take precedence __________________ 7AT Track Car! Journal thread / Car setup details

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05-05-2012, 02:09 AM	#4 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	How does it pick up RPM and throttle position, is it by speed and g-force only?

05-05-2012, 06:21 AM	#5 (permalink)
Zxces50 Base Member Join Date: Jan 2009 Location: Boston, MA Posts: 208 Drives: 15 C7 Stingray Z51 Rep Power: 16	I bought two accesories to go with Harry's IPhone App 1.emprum UltiMate GPS 5kz- for improved positioning accuracy at speed ~$90 2. PLX Devices OBDII Wi-Fi-~$150 plugs into OBDII port- exports tons of data to IPhone- speed, throttle, MAF, RPM.....you can print out an enitre spreadsheet of data Great track feedback. Had been looking at other more expensive stuff but i always wanted to spend that type of cash on track day first- for the handful of times I go this is a great low cost option that is feature rich. All HANDS FREE- set in paddock and it automatically starts video when you cross start stop at speed

05-05-2012, 06:25 AM	#6 (permalink)
Zxces50 Base Member Join Date: Jan 2009 Location: Boston, MA Posts: 208 Drives: 15 C7 Stingray Z51 Rep Power: 16	Another session on track 370Z Watkins Glen Roush Mustang.mpg - YouTube

05-05-2012, 12:35 PM	#10 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	The OBDII output seems a little bit off, is it a phone problem or software issue or the obdII issue?

05-05-2012, 02:14 PM	#11 (permalink)
Zxces50 Base Member Join Date: Jan 2009 Location: Boston, MA Posts: 208 Drives: 15 C7 Stingray Z51 Rep Power: 16	The software has a adjustable delay setting on OBDII data- it is presently set at 1 second (default) This is my first use so left alone- I assume to do some buffering of data- in advanced settings you can go to 0 - I will probably set at 0.5 when I go to NJMP at the end of May

05-05-2012, 06:23 PM	#13 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	All the phone based solutions have a 5hz limit too. The more expensive true dataloggers have 10hz