There's restrictor pills in the stock boost control hoses. That's how they set the amount that was bled off and hence the "high" boost setting. The usual mod in the day was to remove it and send the "high" boost setting up to about 14 psi.
Thanks Duncan, that's the best info I've read. Furthermore after learning about the PCM programming side controlling the factory boost solenoid, the purpose of the solenoid is to "bleed" boost when pin 25 is earthed, thus allowing spring pressure in the wastegate actuator to overcome diaphragm boost pressure, thus closing or reducing the position of the wastegate flap creating more boost as the turbo is able to spin faster.
It's pretty cool to see a designated Pill to do exactly this, would have liked to have seen it with a tiny filter over the end for those moments in vacuum.
The constant bleed pill has now been removed completely from the system and solenoid boost control has been restored once again.
Case closed 😂
The wideband reading is meaningless if it's not running.
Why are you using shitty old sidefeeds on any engine, let alone a Neo? What manifold and fuel rail are you using to achieve that?
Beyond that, can't help you with AEM stuff as I've never been their ECU/CAS combo.
Manual boost controllers (where a little of the boost was bled off) were quite common back in the day, because they were cheap and easy. Generally they had a manual adjustment screw rather than being fixed like yours.
Down side is they always bleed boost, not just when you want them to so an electronic boost controller that uses a solenoid will have less lag.
Hello , im new here and i have A31 home build
RB25det neo stock eng / turbo
aem ems 2 blue connector
aem 3.5 map
aem cas disk
aem wideband connected to ecu
355 lph pump
550 nismo yellow injectors side feed
aftermarket regulator
and won’t start with base aem tuner basic tune
eventually flipped cas 180 degree so it triggers on correct stroke not in exhaust cycle
Now it won’t start
Wideband reads 10 and 11 at lowest fuel setting
and will share calibrations soon for aem tuner i think something is wrong in aem tuner
please if you have any information, am very grateful
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