supra tt fuel + hacked mass ok to run?

[97gsssst]

I am running stock injectors intake b16g at about 18psi, supra tt fuel pump . The fuel pump is making me run way rich I know but would it be safe to just hack the second gen mass (the 3 screens and screw) to lean it out a bit our would I still be rich/lean. thanks.

 

[97gsssst]

ok let me try.....how richer does a supratt pump flow over stock? because I know that roughly the mas hacked is about 20% leaner. Pump not hot wired. please help I don't want to destroy my pistons because I ran too lean.

 

[scotthidley]

How are you monitoring your fuel delivery? I'm running an evo iii, rc550's, supra fp, and fpr set at 39 psi, hacked 2nd gen mas with no screens, screw backed out. I'm still adding ~ 20% from 5k on. I did port my head, still have the stock valves and cams.