limp mode mod

[Rumcajs]

I thought boost sensor was disregarded with dawes and needle valve installed?, unfortunately dont have the cash to buy the JDVM unit, so I couldnt just use one fuel cut kit for the MAF?, if the boost controller is still used then I would buy the second fuel cut unit? I purchased 1 unit last night online, when I get some extra coin will buy JDVM unit

Boost (MAP) sensor is used as engine protection only in other words it is not considered for overall AFR calculation, only MAF is used for that.
There is clearly a relationship between those too as boost pressure over 18 psi in any RPM will bring on fuel cut (limp) and MAF voltage over 3.99 bellow 3000 RPM will do the same. There is also this so called "cold" limp (engine temp bellow 70°C) which occurs when MAF voltage is over 3.75 or so and around 2500 RPM.

You could/can adapt the Jaycar fuel cut defeat unit to MAF only but you still have the boost (MAP) sensor to watch/consider if you want to allow Dawes at higher pressure where boost spike can take it past 18 psi at lower RPM (<4000).
One still needs to find out what voltage reading is MAP output at 17-18 psi. Jaycar unit seems to be preset to keep the voltage bellow 3.9 V so lets just assume that ==>

this simple Fuel Cut Defeater (FCD) to eliminate the standard factory fuel cut which typically occurs at boost levels about 16-17psi. The unit is not adjustable, so no external controls are required.

would than be sufficient to keep the boost pressure related limps from occurring.

In any case it has been proven that ZD30 Di with boost pressure over 18 psi is doing nothing beneficial from either performance or engine reliability prospective.

What JDVM unit gives you is ability to control the "holy grail" of performance especially on ZD30 that is low to mid range torque/power thanks to fooling ECU in to thinking that more air is supplied hence the fueling increase thus bypassing the smoke maps limits . The ability to tweak the loading points individually where possibly limp might occur is another bonus.

Once set right it will be another "OMFG why didn't I do this earlier!" moment. If you thought Dawes and needle valve transformed the car wait for the JDVM effect....

Cheers