IMO, extrapolation does more harm than good.

An electronically controlled throttle may not ever reach 100% on an autocross course in a high powered car. If pedal position is used instead, the extrapolation algorithm creates lots of spikes, making the graph difficult to interpret. The OBD gives you the VIN, so calibrations cannot be mixed if...

Has anyone used LapTimer in Rent4Ring's BRZ? If so where did you mount your iPhone? I had planned to mount it along the left edge of the windshield next to the A pillar but photos show a roll bar tube occupies that space. Suggestions?

Hi Harry,

I really like your app but ran into some serious problems first time using the app at the Nürburgring. Basically all I did was driving 5 laps in a row on the Grand Prix track to find out that no video was stored, only the data files?

The exact procedure was:
1. Starting the App
2....

Anyone know if its obd and ahlt compatible

Hi!
I am a new user of Laptimer Petrolhead on Android.
I made my first recorded laps in a Porsche Club Track day the other week driving my 997 Turbo gen 1.
Lap timer Petrol head is definitely better than other lap timers I tried on Android, but I hope to get it tuned even better:
1) How is the...

Please comment, if your audio works with internal mics. ver 4.2.2 android, mine does not.

Thanks

It works just very low sound.

:)

In the current version of HLT data can be exported to .vob files for analysis in Circuit Tools for very powerful data analysis. It would be helpful for further analysis if additional data could be exported to the .vbo file when it is available in HLT such as RPM, MAF, Wheel Speed, Throttle, Gear,...

We were at a track event this weekend. One of the drivers had purchased an accessory that provide audible lateral G readings to the driver continuously (unless the G was 0). Here is a link to the actual device:

This might be a useful feature for the lap timer program. Obviously some would like it...

Request Celsius value to also be listed in Fahrenheit. It looks like RaceRender has a function to create a new value based of another but it doesn't support a formula to multiply it by 9 then divide by 5 and finally add 32 to it so if the CSV export could also have Fahrenheit value that would be...

Its probably a little early to adopt for HLT - but if the prices come down I like where the future is headed:

This is a general FAQ I will link to in case I need a trace file from a user.

Opposed to crash logs - which always document a hard crash including program termination - tracing allows to document processes going on in the software. A typical tracing process is made up from enabling tracing,...

Does anybody here have experience of using Harry's Lap Timer and a multimedia double-din stereo which is fitted in the car's dash. I am thinking about Kenwoods' DDX4023BT, which sits nice and high in the Lotus Evora dash and has a 6 inch display. So it should be easy to glance at and not obvious I...

I've used both of these to good effect in the past. But needed to purchase new items having sold old items.

Headrest mount:

iPhone mount:

I got the iPhone 5/5S model of the phone mount. I prefer this interior view offered from the headrest position, and as my car (M135i) doesn't have bucket...

Dear LapTimer users,

Not only in light of the infamous activities of NSA, GCHQ, and other Intelligence Agencies we see the enormous privacy challenges we face this decade. I took this as trigger to rework LapTimer's Privacy Policy. I hope it is not as boring as other statements, I've tried to...

This is more accurate than calculating revolutions/mile from the nominal tire section width, profile and diameter. On my car, an on line calculator gives 759 rev/mile while the measured rev/mile is 768 for 275/35/19 Dunlop ZII tires.

So, I've read the various posts re ext. mic w/ iPhone 4s but has anyone done it w/ a 5S yet? If anyone has had good results w/ an ext. mic please list exactly everything you used and how it was connected. Me want exhaust sound! Thanks.

Hi,

Just posted some early snapshots on LapTimer v18's reworked Online View (part of LapTimer Petrolhead and Grand Prix).

- Harry

Hi Harry,

I use your laptimer for motorbike. As you know, while racing, it is better to concentrate on the track rather than look at the speedmeter.
Do you think it is possible to add a speech to tell the current speed?
P.S.
I use a BT headset in my helmet

thanks again

Salvo

Hi,

I just posted our new Harry's LapTimer Screen Flow - a complete overview on the major dialogs available in all LapTimer editions.

Hope you like it!

Here is the Facebook announcement .

- Harry

Hi does anybody using this above combination with HLT?

Thanks for answers ...

I recently upgraded my iphone os and harrys software. the app began to crash. i realized it crashed at start stop point. i also saw it crash if i initiated video.

solution. uninstall app. change setting>general>reset>reset location and privacy

load up app and give permission to phone,...