Hi, guys:

evo is my first turbo car. plz, don't laugh my stupid question.
if i just want to install hks evc first and boost up to about 1.2~1.3bar without up grade any after market fuel computer, is this safe for the engine??

now have HKS racing suction kit and all INVIDIA exaust system on my evo.

Thanks

 

Yes, safe. You could max at 1.4 and still be safe. For instance, the 05's run higher boost from the factory than 03-04's.

 

I am running 1.5 all day long and it is fine, you will be more than ok at 1.4 very safe.

 

Thanks!! how about computer?? you guys don't wanna add the fuel computer??
i'm thinking to get hks f-con sz or greddy e-manage, i don't really need the huge power, just about 320~350hp is fine for me.

 

when i installed the EVC 5, i did a dyno(set 20 psi) . it showing 3~5k rpm, i'm was running 14~12 AFR at WOT. it is safe for long term? i dunno. Every car is different.

i have Apexi intake, JIC ex-manifold, 02 Housing, TXS DP, Ultimate Racing HF cat, Megan Catback.

 

You could add a fuel computer to fine tune the mix with the added boost, but I am just saving for a full standalone.

BUY A FUEL PUMP!!! You have made no mention of that upgrade and that is a MUST. Plus, it's just cheap insurance. You don't want that stock pump to fail on you during a spirited run, do you???