hey guys i finally installed m o2 dump . . . my mods are in my profile, and my greddy profec B specII (the digital one) still shows me getting disgusting boost creep on the freeway . . . in 3rd when i gun it, ill have it set @ 15 PSI and it will climb its way up, and by redline im pusing about 23psi . . . i have a ported evoIII . . . the dump is ported as well, and a ported exhaust manifold . . . can it be that my profect isnt as accurate as it should be, or inaccurate at all ? (i dont have an actual boost gauge) . . . ive pretty much done all i can to control this creeping problem . . . let me know what you guys think ...

Get a mechanical boost gauge and compare the two.....
You never know.... We all know the SpecII wasnt the best thing GReddy ever came out with.....

ALLeyesONmyGSX said:

i have a ported evoIII . . . the dump is ported as well, and a ported exhaust manifold . . . . . . ive pretty much done all i can to control this creeping problem . . . let me know what you guys think ...

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You have 34mm flapper correct?
Is the dump a 2.5 tubular?

Did you prt the wastegate side on turbine housing, before you put the O2 dump on?
I had creep until I did this.

Yes, the digital boost gauge is pretty inaccurate. Get a mech boost gauge and your jaw will drop. You also want to make sure to read the manual for the boost controller and mess with the sensitivity/consistancy (i think its the GAIN one) and start boost settings. Those things are real finnicky.....Good luck and also try checking for boost leaks...

99gst_racer said:

Get a mechanical boost gauge and compare the two.....
You never know.... We all know the SpecII wasnt the best thing GReddy ever came out with.....

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I second that notion

I switched from electronic to mechanical because I was not getting good readings at first. Mechanical is working perfectly now.

evolvingGS-t said:

I switched from electronic to mechanical because I was not getting good readings at first. Mechanical is working perfectly now.

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so im guessin that fixed the problem then

liquordrunk said:

so im guessin that fixed the problem then

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If it's not fixed you may have to do some more porting on the turbine housing. Your mods list says ported but it could still be a restriction. If it's not ported good then your dump isn't going to make any difference.