will it be safe to use a pfc from one fd in another fd.

The only difference between both fd's, is the fd the pfc was tuned in is auto, and has a bigger intercooler,

the new fd the pfc is going in has a stock intercooler, and a manual, everything else is the same.

 

It may work ok for you, stock boost levels? you should get a wideband if you don't have one to monitor the afr's and tune the afrs if needed

 

rather risky, don't you think?

 

yes stock boost levels, both cars have the same modifications, only difference is transmission and intercooler.

 

If that is true, and the auto ran correctly and safe on boost; then the only difference should be the idle setup rpms.

 

very cool, what do you mean by a different idle setup

 

The tuner may have tuned the idle cells in the fuel and timing maps p4-6 and n2-3, you may want to or need to adjust these for a smoother idle, and the idle air adjustment screw. and some of the ign settings may have been changed using the commander or datalogit.

 

Auto trans engine have different idle adjustment due to idleing in gear while a standard idles in neutral. Got it.