the fuel management system is a piggyback or full replacement system of ur existing ecu.
such as safc,sitc,smt,obit,unichip,motec,haltec,microtech.......
for a budget of rm2000,i think it is quite tight to do this td04 project.
a td04 pajero+installation+welding the adaptor and downpipe will already cost u a bomb(around rm1000).dont bother to say want to add the piggyback.a safc secondhand will cost u rm350 (5 button),blue screen around rm600.for boost control,u may use the 'tulang ikan' which is cheap but i personnaly do not think it is reliable,better go at least a proper secondhand manual boost controller which will cost u around rm200.a secondhand fcd which cost around rm200.a fuel regulator maybe a fse secondhand at rm350 not including welding work for l2 fuel rail.metal gasket +others gasket+ labour =?
for question 1:
i also dont know where to get those forge thingy for l2 but i know the cost is very high.
for question 2:
if u change ur head gasket to a more thicker one,u r lowering down ur compression ratio.skimming of head also influence the compression.
my advice for u is play this engine step by step and provide this engine with care first because u just transplant ma.
use some part of the rm2000 on ur car maintenance first.check the engine mounting,waterpump,belting,thermostat,fuel filter,engine oil,radiotor,drive shaft + those stupid rubber which alway worn out,bushing........
just maintain it first and drive it until u quite familiar with it then upgrade where u think not enough,maybe u will think to upgrade the suspension sytem or braking system first and some simple mod such as intake and exhaust upgrade and up boost a bit,let say 0.8-0.9 bar.
