I left it for stock .....BOV also didnt install....i wanna collect opinion 1st then consider wat to do ....but in my mind ....my aim is to boost for 1bar safely....any guide or what should i start modd wif ?
In that case, u might need the following...
1) Bigger injectors to prevent insufficient fuel in combustion chamber and prevent lean combustion.
2) BOV are optional. but I'm afraid stock/oem BIV(plastic type) may not be stroong enough to hold the stress and might fail.
3) Adjustable Fuel pressure regulator to increase the pressure in the fuel rail in order to supply sufficient pressure for a bigger capacity injectors.
4) A fuel pump that supplies suffficient flow rate for the bigger fuel injection.
5) The stock intercooler may not be efficient in cooling the bigger mass of air/ Or u can try relocate it to front mount instead.
6)A bigger turbo that have a more effective compressor map when boosting 1 bar.
7) A decent boost controller rather than tulang ikan. More stable boosting.
8) A thicker metal gasket compare to stock 1mm/0.8mm metal gasket to reduce the compression ratio of pre-boosting.
9)A piggy back to adjust the AFR so that your engine is safe from detonation... Or an SAFC will also do...
For no 5, 6 is not a confirmed answer as I do not know the compressor mapping of a L2 turbo.
Just bare in mind, most of the engine that detonate is caused by bad tunning instead of hardware...