Anyone ever use a blue-tooth cell phone dyno? I downloaded one the other day but don't have the adapter. I was wondering if they are worth a crap.

 

I didn't think this was possible with our OBDI cars...

 

Phones like the Iphone which have built in inertia sensors have apps like a dyno. There's nothing to plug into the car. You just mount the phone on the dash. You need to enter basic information such as total weight etc. You then make a 1/4 mile run and it can calculate how much HP it took to run a 1/4 mile. Since it detects your exact position, it will know exactly how far a 1/4 mile is and exactly how fast you were going at the 1/4 mile.

On a dragstrip, the mph will usually be lower because it's a calculated number. 66 feet before the finish line is a MPH light. The time it takes to break that light then the finish line light tells the timing system how many feet per second you were going and gives a MPH.

I've never seen or have no idea how an app loaded with bluetooth has any application to being used as a dyno unless the phone has inertia sensors. There was a program a few years ago that ran off a palm pilot and used a timing light inductive clamp as a pickup sensor. It was accurate enough for most people.

 

Don't want to thread jack but if there are any app geeks out there looking to make a little $$$, I would definately pay for an iphone datalogger for ODBI.

 

My app. is for OBDII cars, hence it won't work on my '88 but thinking about trying it on my '99.

 

what is the name of the app?

My old Kenwood headunit had an accelerometer in it and would do G's, 1/4mile, and 0-60mph times.

 

Torque dyno.