The Truspeed has to be wired in to work, that's why I went with the Superchips TirePaq, because it plugs into the computer port. Switching tire sizes does require you the plug it in and flip the key a half dozen times, but at least it's not hard wired into the computer and a permanent fixture in the cab, plus how often do you really change tire sizes. The Tirepaq has worked fine for me, I'd recommend it. From what I remember during all my research before I got the Tirepaq, the Truspeed doesn't have a good digital readout, meaning you twist a screw until the reading on the speedo matches the speed you work out in a tire calculator. I personally prefer scrolling through a menu, picking a tire size, flipping the key a few times, and unplugging the whole mess and not worrying about it.

Superchips 1846 Superchips TIREPAQ.


Edit: I think the Tirepaq will end up being cheaper too, based on a quick google search

 

right now i am using a predator diablo sport programmer and still wanna use it. how does it work if i am stil using it.

 

What size tires does it go up to?

 

The Tirepaq works through the ABS module somehow, and as a device it isn't capable of affecting engine tuning at all, so I assume they'd be compatible.

I can't be sure of exactly how the Truspeed works since I've never touched one, but here's the install intrustions, it tells you which wire to cut, so you can probably read into which signals will be altered. The truspeed alters input data, the Tirepaq changes how to comp reads the signals.

http://www.superlift.com/instructions/33001.pdf

 

Tirepaq goes to somewhere around 42" max, Truspeed maxes out somewhere around 44" in their install guide.

 

Cool thanks for the info....I will be looking into this.

 

I installed a truspeed about two? years back with some help from FTE.

I find it to be a great little unit and I do recommend it since it has performed as advertised with no problems at all for me. It has two settings that can be stored for different tire sizes which has proven useful for me a couple of times since I installed it. A flick of the switch and it's set for my winter tires.

The only bits of help I can offer is take your time with the install and make sure the wire splices you perform are solid and sealed.

You can place/install the unit (as I did) semi permanently beside the fuse box,,, zap strapped to the horizontal steel brace running under the steering column. Of course you can place it anywhere you like. I just found that spot easy to access with the fuse box access cover off to adjust the speed settings while driving using my GPS as the speed reference.

Note for Calibrating Speedometer:
Don't let the instruction manual confuse you when you get to the calibration section. All you need to do is use a GPS as a reference for setting the truspeed.

BTW:
If you do go with a truspeed unit,,, be patient and shop around for a good deal. I ended up paying around $130.00 or $150.00 CAD (memory is fading on me) after a couple of weeks of shopping around.


Rick...

 

I have an SCT X3 tuner from 5 Star Tuning and run the TruSpeed to correct the speedometer as the tuner will not correct it. I set the TruSpeed with a GPS to be spot on at 75 mph. It corrects the shift points, and the readings on the overhead console. I installed the TruSpeed in late 2001.

Superlift TruSpeed ratio converter

The Merlin Speed Wizard is like the Truespeed.

Truck Enthusiast Products

http://www.fmdkinc.com/Speed%20Wiz/s...04-install.pdf


I don't know of you can stack another Tuner if you run the Superchips 1846 Superchips TIREPAQ. You can have performance tunes added to it, but they are not "custom tunes".

 

Ok so sticking with the truspeed I can still run my diablo right?

 

Everything I've read points to yes. The Truspeed seems a to be a lot more friendly with engine tuners since it doesn't actually flash anything into the computer

 

Alright thank you for all your help. Superlift truspeed it is!