dude , i was of the impression that petes box altered the injection quantity!! , as is the usual practice to get higher power.. but during petes day out in cbe,
i had a discussion with a PSI executive , he told me that they fiddled only with the TIMING of the injection, i have changed my viewpoint ever since!!. he was particularly interested in knowing why the Rail Pressure Sennsor in EDC17 has got maximum of 2V output though it is rated for 5V.
he told me that the there is a presuure difference required[meaning the pump must deliver more fuel at higher pressure to prolong the timing at lower RPM!!] , meaning definitely the pump is in More stress !!!, but it is under tolerange range, these guys play it safe!!.
and about engines with FGT and VGT, what happens is VGT characteristics are not changed , FGT too, thats why it is always advised to get a filter upgrade too.
i.e. since the injection timing is prolonged, the mixture tends to be richer!! i.e Stochiometric ratio wont be maintained at optimum , this can be made better if more air is available through a CAI filter .
i was under the impression that these guys played with the VGT to make up for the stochiometric ratio that is increase the boost, but this is not done , to keep the turbo chargers safe!!. same applies for FGT too, but this wont be affected much coz there is only a permamnent change. whereas in case of the VGT the unit will be under stress if the charecteristics is changed continously from that of the manufacturer set!!. but anyways these guys arent fiddling woth the turbo unit either!!.
and buddy the ECU never knows how much torque is made , it knows only WHAT TORQUE IS REQUIRED BASED ON driver demand and other parameters , based on this it decides the timing of injections!! . what the Petes box does is alter these timings by giving false signals to the ECU through the RISC processor based BOX. there is a safe mechanism involved, that is the ECU will take over the whole functionalityand BOX route is shuff off , if the BOX detects anything wrong in the injections!!. and its compulsary that all the BOXEs are made to give power output only within the tolerance range of the engine!!.
this was told to me by the PSI executive!!.
so there is no need to worry using the PSI -petes box. but yes this wont be case with all Boxes i meant those from other manufacturers who claim a 35-50% increase in power!!. i thought that PSI was one of them!!.
PSI promises maximum 30% power increase , this is possible only with use of stage 2 with filter upgrade.
peace out
sameel