Ideal Boost Levels

All questions and problems regarding Superchargers, Turbos, NOS, ZEX, intercoolers, water injection, etc.
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Sadden
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Re: Ideal Boost Levels

Post by Sadden »

willwren wrote:The scangauge won't tell you boost pressure. Only BCS duty cycle.

There is no IDEAL. As I stated above, boost PRESSURE means nothing. How well your engine flows means everything (cubic feet per minute). The Boost pressure reading is only useful as an indication that related components are functioning.

You're better off increasing timing (PCM or custom tune) than decreasing pulley size.
So idealy the less heat we have. combined with a super high FLOWING engine with a tiny pulley could run only 1 pound of boost and put out unreal amounts of power?
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Re: Ideal Boost Levels

Post by 00Beast »

Theoretically. But, there's always going to be restrictions causing pressure build-up. With a roots-type charger it's all about flow, with a Turbo or a centrifugal charger pressure is involved as well.
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Re: Ideal Boost Levels

Post by 99ssei »

willwren wrote:I may be mistaken, as both mine (OBD1 for the Zilla and OBD1.5 for the SLEeper) display only BCS (boost control solenoid) duty cycle. 0% for idle, 100% for full throttle (full boost) and anything in between. Not actual pressure value, but my MAP sensor is only for a boost indication, and not used by the PCM like yours.
A little off topic, but recently, I've noticed that my PID "Boost Solenoid Control %" is always 100%. In older scans I had in October, when TPS was 0, BCS was also 0% (TPS > 0 = 100%). I'm wondering if there's an issue there. Anyway to test the electronic BCS?
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Re: Ideal Boost Levels

Post by Derek »

Has anyone verified if the aeroforce scangauge works with the obd 1.5 yet?
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Re: Ideal Boost Levels

Post by 00Beast »

Holy Old Thread!!

I don't believe we have, otherwise it would've been "Breaking News".
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