I can see that the stock Evo 8 `s injectors at high rpm have a nearly 100% Duty Cycle on stock boost.

How much can I safetly increase boost ? I have a 3 port.

Everything is stock


thank you

 

so..bump Are 28psi safe for example ?

 

You can typically reach up to ~110 or so IDC on evoscan without having to worry too much.

A 28psi peak might be doable, but I wouldn't try to hold it that high throughout the whole powerband.

 

thank you , I reach more than 110% and I get leaner (more than 12AFR at redline) I think I will upgrade the Fuel pump.

I get 289 load (calculated Load no Tephra mod yet) around 3900 RPM , I thinnk it is about 28 psi then it drops of course but It gets leaner from 5500 rpm and above and I have knocks

 

289 almost certainly isn't 28 psi.

If you're leaning out above 12 then you're running too much boost, reduce it until you upgrade the fuel system.

 

28 PSI at near redline is too risky for stock pump.

 

I am glad , I am just worried about my rods ,it spikes early ,but if it is less than 28psi I think its ok .

No I am running a lot lot less at Redline , about 220 load

thank you both !