what is a good OBD2 scanner to get? my first preferance would be for a Palm based one, but if you gain additional funtionality by using a PC version then I guess I'll just have to drag out the laptop. I noticed that some also come with dyno programs to give you performance results, how accurate are these things in determining HP, torque as compared to a chasis dyno. if it get's pretty decent, repeatable acurate results then that alone might be worth the price of admission.

 

The software program that uses speed vs acceleration can be very accurate assuming you input the exact weight and the samples are frequent enough from the speed sensor.
That is usually the problem sample rate too low, but 5% or better accuracy is easily achieved as to rear wheel torque. A chassis dyno is only 3% sometimes much worse.

The chassis dyno will always read higher because of lack of wind resistance [which slow the motors acceleration] and the drum doesn't weigh as much as the car.
Of course you must have a place to drive 130 mph with scanner software.

 

I use Autotap(pc version), however they do have a palm version.
http://www.autotap.com/products.html

http://www.villagephotos.com/pubbrow...elected=551133

 

I was looking at autotap since my friend also has this (pc version for GM, so I can't use it) but it seems to be a little bit dated in that there are different versions for different manufactures where as the newer ones seem to be able to read all vehicles. I was considering either http://www.autoenginuity.com/ or http://www.auterraweb.com/dynokitsnohotsync.html as these are universal units that will work on all vehicles after 1996. These also have CAN and automatic code lookup to give you a description of what the numbers mean and dynos. Seems like a good overall package for the money. The autoenginuity one also offers a PC version for $60 additional so you can have both handheld and laptop versions which would be convenient.

 

Bump. . .

The autoenginuity product looks like a nice package. Is anyone using this that can give some feedback?

Do I need the CAN option for an 05?