your shift points use a lot of data and one data point is speed so you want your speedo to be correct. If you are running 35's there will be a very noticeable difference. Also you can adjust your psi threshold to keep your lights off when running lower psi, daytime running lights can be set up in various configs one thing make sure your buddy unlocks from his vehicle because if it has not been unmarried from his vehicle it will not work for you.

this is what it can do and see how to program it and restore it so it can be used by you.https://www.aev-conversions.com/product/procal-module/

 

I don't think Procal is worth the 170 they sell it for. You can get a better bang for the buck with other options. But it is worth 60 bucks and you will notice a big difference with a corrected speed.


I would check out obd jscan first though. Works on ios and android, is cheaper, and you can do more.


https://play.google.com/store/apps/details?id=net.clever.obd4u

 

Make sure he resets his jeep back to stock with the pro cal or it will not work on you jeep.

 

I'd almost suggest buying a generic OBDII bluetooth adapter for 15-20 bucks and OBD JSCAN



Bit cheaper and potentially a few additional options.

 

A buddy of mine is selling a AEV procal for 60 bucks, given what they go for this is a sweet deal it seems. My question is what will this truly do. I ask that for one important reason. I have seen other threads on this topic that say if you have an automatic trans and go to bigger tires like i have (35s) that the procal will adjust the shift points. This would be worth it for me alone, as I dont really care about the speedo adjustment aspect of the procal (I would not buy one just to correct my speedo)



Other posts I have seen state that if you want to change shift points you need to get a true tuner, not a AEV procal. What is the truth? I'm not expecting the change in shift points (if that actually happens) to be some dramatic change, so my expectations are low. There just seems to be alot of misinformation floating around regarding what these procals can and cant do and it has me confused. If anyone can help me out and give me a better idea of what I would truly be getting out of the Procal, I would appreciate it. My Jeep is lifted 2 inches on 35s with the stock 3.73 gears just FYI.

I have a ProCal with 35’s and wouldn’t hesitate to pay full price for it if I knew what it did. Same thing goes for my Pedal Commander.

 

That's exactly what i have. Much better performance. A re gear to 4.56 would complete it.

 

Procal is outdated and Im not sure why AEV has not come up with a better solution. AN App would be ideal. Dip switches went out in the 80's.

Jcan and the iCar ODB II Dongle is a $5 investment aht will give actually give you info instead of just sending information. It reads a ton of sensors and displays them in real time plus:

RPM, Calculated Load Value, Coolant Temperature, Fuel System Status, Vehicle Speed, Short/ Long Term Fuel Trim, Intake Manifold Pressure, Timing Advance, Intake Air Temperature, Air Flow Rate, Absolute Throttle Position, Oxygen sensor voltages/associated short term fuel trims, Fuel System status, Fuel Pressure and many ECU data.

https://www.amazon.com/Vgate-Diagnostics-Scanner-Interface-Adapter/dp/B01CG0XWDI

All of it is visual on your phone screen. Buy your license on a computer and then type the info into the Jscan phone app. Some people have had issues getting their license to connect and I think it is operating software based. I had the issue with iPhone but recently switched to LG and had no issues. Jscan is available free to review what its capable of.

 

Are you saying the OBD dongle and Jscan app can change settings in the vehicle like a ProCal or does it simply read and provide information? I have a Kiwi 3 Bluetooth OBD reader using it with the OBD Fusion app but I can only read info and clear trouble codes with it. I’ve looked at Torque Pro and now Jscan apps but don’t know if it’s worth changing apps.

 

I have a BlueDriver, ProCal, and DiagFCA. The last one is extremely powerful and I used it when I swapped axles to diagnose wheel speed sensor issues. It allowed me to log wheel speed sensor output (as well as many other things) as I was driving. I like the Procal as it is very simple to use and I keep it with me in the Jeep.

I am curious however if the Jscan will output and log wheel speed sensors.

 

I have a BlueDriver, ProCal, and DiagFCA. The last one is extremely powerful and I used it when I swapped axles to diagnose wheel speed sensor issues. It allowed me to log wheel speed sensor output (as well as many other things) as I was driving. I like the Procal as it is very simple to use and I keep it with me in the Jeep.

I am curious however if the Jscan will output and log wheel speed sensors.

I haven't looked to see if it works, but yes, wheel speed sensors are listed.


I've got a screen capture for you (in demo mode). I haven't actually tried it yet:

 

Yes, Jscan can change all the vehicle settings that ProCal can in addition to being used as an OBD diagnostics reader, and a fairly high tech one at that, as it can read abs and wheel sensor faults.



I was given an AEV procal years ago and while at the time thought the retail price was high it was worth it considering what it did, and the technology was not available to get it done cheaper. With the JScan program and a decent dongle however, the proscan is now obsolete. At $60 is the procal a good deal? sure, but the Jscan will get it done and more and is a little cheaper.

 

Another vote for jscan
Procal is not being up dated for any new features
Torque is cool but more of a fancy looks nice toy
jscan is a real deal troubleshooting tool, see the data logging options

 

Thanks for all the input! I think you all have talked me out of buying my buddy's Procal and into going the Jscan route.

Now I just need to figure out which OBD adapater to get, there is about a million different ones on amazon.

 

One of the best is OBDLink MX+

 

Use one of the adaptors he recommends.

 

^^^^^this. go with his recommendations.

 

I use this with the Jscan. It was one for the recommended adapters.

 

Just received that bad boy in the mail today. Fired up the Jscan, which worked flawlessly and had my tire size corrected in less than 5 min. I even turned off the seat belt chime and set the auto door locks while I was at it. Jscan is awesome!

 

The only thing I wish the JSCAN would d is allow me to use the lockers in 4 hi-- I think the procal will allow that

 

Jscan does.
Procal does not. I believe you may be thinking of Flashcal from superchips.... yet another outdated controller.

 

When do you need the lockers locked in 4 Hi ?

 

When wheelspeed is a factor.

 

So you wan to lock the rear in 2WD Hi.

 

Nope, 4 Hi would be the practical use. Deep snow or mud or even sometimes sand.

But 2 hi with rear locker would be cool too, I could probably pull some 3 wheel motion just for fun on the street. Like same as in a TJ with a rear Detroit. Pick the front inside tire up 2' in the air when leaving a stop sign and making a 90* left turn. That's just for fun though.

 

With the Traildash 2 the lockers stay engaged until 30 mph. I can lock the front or the rear in 2wd, 4hi and of course 4lo. I will lock the fronts in 4hi when the snow starts getting deep.

 

That's great that you can, but I really can't think of a time where I can go 25 + mph and need the front locked. The rear perhaps.

 

Climbing a snow covered pass. I will use the front lockers before I use the rear.