Recent content by vprtech

I agree about it taking money and time, but you forgot about expertise. I believe that is a record for a pump gas Viper motor, car or truck.Greg Good , EED, and everyone else who had their hands this build did an amazing job. Of course special thanks to Trainman for stepping up to go forward...

So the Viper truck ecu (aka JTEC) has special adaptive values that change to help ecu control the idle, and return to idle nicely. The ecu can adapt to a certain point, if it cannot adapt properly, the side affects can be idle hang or idle dip when releasing the throttle. For the ecu to learn...

The Dynapack, in my opinion, is the best dyno to do engine mapping, of course I am biased, as it was me running Jerrys truck on the dyno. Does it read higher than a Dynojet? It can, but as power measuring tool, it is very consistent, just as consistent as a Dynojet, which much better data...

"cough"

I've seen this code from time to time on forced induction tunes. Basically the ecu will do a rationality check, it knows that between a certain range of tps voltage and rpm, it should see a certain map value. If you are outside that window it will throw a code. Of course it could also be a...

That is a catalyst efficiency code, the JTEC runs a some active tests while you are driving down the road at a constant speed / load to make sure the catalyst is doing it's job. Basically it looks at the switch ratio pre-cat to post-cat.

Believe it or not, Chrysler has one of the fastest potential logging capabilities I have seen. The factory ecu is capable of logging at five hundred times per second in SCI mode. All aftermarket scan tools that I have seen only poll for data every 120-150 milliseconds, which works out to be...

We can reflash you pcm also, we've fixed our flash price for the SRT10 truck people to $450 . The SCT is nice if you want to be able to switch your tunes, but the actual calibration is the same wheter it is loaded through the SCT hand held or flashed on my bench. When SCT released the Dodge...

I need to get ten or more people together, to get Drew Tech to commit to the code development to support the Chrysler specific coms protocol that the Viper trucks and other Chrysler vehicles use (non-CAN). If you are interested please contact me for details, and you can find a lot of the...

Guys, I'm trying to put together enough people to get Drew Technologies to add support for their DashDaq display device for the Viper trucks. I posted info about it on the DC Performance sub forum here : http://www.vtcoa.com/forums/showthread.php?t=35553 Please take a look, this would be a...

I'm trying to get ten or more people together with Chrysler SCI vehicles , to get Drew Technologies to add non-CAN, Chrysler specific support for enhanced PID's on their DashDaq . What this means is that you will get high speed data rates, 100 samples per second or more, as opposed to generic...

We make a lot of changes besides adjusting the main fuel and timing lookup tables. Enrichment strategy, decel fuel cut, rev limit, cooling fan adjustment, and other changes that help maintain consistent performance, not just dyno power numbers, can be changed according to the application. -...

For the most part, the factory JTEC engine control module does a very good job of compensating for altitude and temperature. Dodge had to make sure that your vehicle would run within a very narrow operating range whether you were at sea level, or eight thousand feet in the mountains. The only...

It's actually cheaper to get your pcm reflashed. - Chris www.dcperformance.com

There are several advantages to the SCT tuner : -It can store three tunes -It will save your stock program before flashing your computer, in case you need to go back to a stock tune. -You can read and clear trouble codes. -If you need additional tunes, or changes to your tune, I...