NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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-   3rd Generation Specific (https://www.nopistons.com/3rd-generation-specific-18/)
-   -   Can Some Tell Me How Tune My Profec B Type 2? (https://www.nopistons.com/3rd-generation-specific-18/can-some-tell-me-how-tune-my-profec-b-type-2-a-36052/)

Rx7aholic 03-22-2004 09:05 PM

Anyway I when to test drive it to adjust the setting and I can't get it right, in 3rd gear at wot the boost gauge pin at 15 and I suddenly back from the thorttle. I have the gain set at 0.06, And the low setting is at 7, the HI at 8 and I am still hitting 15 lbs of boost ? Am I adjusting the profec b spec 2 the right way? BTw my setup is like this from the turbos nipples both conntect to a T-fitting then it goes into the in port of the stepper motor, And then from the "com" port of the stepper motor with a T-fitting goes into the wastegate & pca. Also my ideal boost that I want to make is 12-10-12. thanks alot, khris

9BASE3 03-22-2004 09:56 PM

Turn the high setting all the way down. Use the low setting. The high one is for 18+psi I believe (Apologize if I'm wrong). There are also little dipswitches in the back that need to be set.. Unfortunately I don't know what they are. Hopefully someone here does.. https://www.nopistons.com/forums/pub...IR#>/smile.png

Rx7aholic 03-23-2004 08:25 AM

That is the problem I don't see any dip switchs in the back. So if i use the lo setting I should be ok? but how do I adjust the knob or what number setting I set it for?

mazdadrifter 03-23-2004 08:47 AM

i believe the spec 2 has to be calculated for everycar (wastegate) because without a boost controller if you boost let's say 10psi, then you add a boost controller and set it to 5 psi, then you will get a total of 15psi. because the stock wastegate doesn't even see pressure until the 5psi has been surpassed, then from 5psi on the wastegate opens normal (another 10 psi later)



try ignoring the number values, and starting with like 1 psi on the low setting and see what you boost, then move up in increments.



i believe there is a setting that you can set for the spec 2 to compensate for your stock wastegate and "do the math" to give you your actual boost, but in "out of the box" form it can't figure that out for it'self.


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