Engine/Transmission (1998.5 - 2002) What Box does what ?

[EBozard]

Is there a chart or something to say what box does what, like:



Van Aaken > Fuel and Timing

Edge > Fuel Only

etc

etc

etc

 

[AFarmer]

Edge Comp and Juice w/Attitude is fuel and timing

VA is just timing

EZ is just timing

TST is fuel

Many combinations of boxes out there that do many different things.

 

[EBozard]

i got a van aaken, and wow if it's only timing, then that means these ctd are really are de-powered from the factory because the VA box really wakes up the ctd, thanks

 

[EBozard]

how bout superchips and hypertech ?

 

[JR2]

To say that the EZ or VanAken are just timing is a bit misleading. They do add some fuel but not that much. They add as much fuel as the VP44 software will let the truck add. That is why all the boxes that do not tap the pump wire add about the same HP, same thing goes for all the downloaders. They all are limited by the VP44.

 

[NoSeeUm]

Being no expert, this is what I pretty much know about performance boxes.



A box that taps the pump wire --> Fueling

A box that connects to the Can Bus --> Timing

A box that taps the pump wire and connects to the MAP sensor --> Fueling and / or De-Fueling

A box that connects to the Can Bus and the MAP sensor --> Timing and Fueling and / or De-Fueling



Keep in mind that the last one fuels indirectly as opposed to a box that taps the pump wire. These boxes will intercept the MAP signal and send the ECM a higher signal. This is the "fueling by fooling" method, because it fools the ECM into thinking that the boost is higher that it actually is, so the ECM fuels harder.



Also keep in mind that if the box connects into the MAP sensor, it might do so to accomplish just the opposite that I described above. The box still intercepts the MAP signal but in some cases will fool the ECM into thinking that boost is actually lower than it is. This way the ECM will not defuel at higher than OEM boost pressure.



It is my guess that most likely the latest boxes, that connect to the Can Bus and the MAP, will do both. There can be many combinations of features.



Another example would be the fueling box that also connects to the MAP sensor. For example, the TST3. This box has the ability to lower power below stock. Say on a condition of high EGT. It does this by intercepting the MAP signal and lowering or even raising it above the OEM design pressure. Once again the signal that the ECM sees has been modified and the ECM gets fooled. Thereby forcing the ECM to defuel and lower the EGT. In this case "de-fueling by fooling" method would be more correct.



I would suspect that this type of box would also do some "fueling by fooling" as well as fueling directly via the tapped pump wire.



BTW, I believe that the TST tries to force defueling by fooling the ECM into an overboost condition. That is why that feature is effectively disabled when using a Smarty.



Jim

 

[EBozard]

Boys that was a good post, thanks Jim