Rb20 Losing Power Under Full Load

[TAKUSHI]

hi all

k now the problem im getting is, lets say im at 2500rpm, put foot flat to the floor, get to 10psi boost, car doesnt want to accelerate to its full potenial, feels like its pulling a caravan up until 5500rpm, after that it takes off an accelerates fine.

During its moment between 2500-5500rpm, if you gradually come off the throttle, till boost backs off to say 5-8psi, itll pull harder than if you mashed the pedal full throttle, when its really cold outside the car may pop an cough a little while said load issue is occuring, its not a miss, maybe a break down in the ignitor

Ive replaced afm, ecu, coilpacks and turbo(1st one shat itself), theres no boost leaks, wastegate is working fine, no boost controller connected, replaced fuel filter, replaced plugs.

mods are fmic, bosch 040, 3" turbo back(no cat), bov which is working fine and a pod, also the ecu i swapped has a small tune on it, i noticed slightly better performance once swapped over but still not getting full power

been scratchin my head for aaages over this, almost thinking about going thru and replacing cas, ignitor, knock sensors and tps

any help would be great guys

cheers

nathan

[Moodles2]

Sounds like R&R past 10psi, aftermarket ECU or Nistune is the solution I think

[Dose Pipe Sutututu]

Sounds like R&R past 10psi, aftermarket ECU or Nistune is the solution I think

RB20s run 10PSI from factory, clearly not R&R