RB25 & Greddy Profec B Spec II

[PANGES]

Hey, I just installed one on friday and have been playing with one since.... I've come across a problem today though.... my settings for 10 PSI are:

Gain: 21%Set: 70 SetGain: 49%

These settings gave me a very nice 10 PSI pull last night. It was boosting perfect last night. Holding very smooth and pulling hard. However, today when I drove around wtih the same settings, It spiked to 11.3 PSI and then it would bounce around between 9 psi and 11psi...also, when i shift and get on the gas again, the boost would drop to 5psi then work it's way back up... any thoughts?????

Thanks

[dekand]

id have to check but as far as i know all i did on mine was set the gain and didn't mess with the other settings cuz thats when i got spiking and falling off problems

[krayton]

i noticed with my profecII it wasnt the settings, it was the turbo.

i had a full 3inch DP to exhaust, IC and i couldnt keep that turbo going. i could get it to 12 psi and it would fall off to 7 by redline.

the turbo is just to small. id also get spikes like crazy too. tiny lil wastegate

[dekand]

weird cuz mine holds at 10psi pretty steady... i have a 3" dp back and fmic too

[PANGES]

what's your settings?

[dekand]

set: 30%gain: 10%setgain: 0%

[PANGES]

maybe i'll try that tonight... thanks dekand... how do the n1 duals sound on the rb? I was considering getting it since i just scraped a hole in my apexi gt spec. lol. I like the gt spec because it's so quiet tho.

[dekand]

i can't say for sure cuz ive always had an exhaust leak at the dump pipe which annoys the **** out of me lol, im sure without that it would sound good though...