Quote:
Originally posted by bluetwo
i'm not sure about genIII engines, but the genII (91-95 us, and 90-93? japan) has a stock boost between about 7-11.5psi. it's not set at a given value, but a range (this is what is considered "normal" in the BGB). the genII with a steel turbine ct26 can be safely boosted to about 14-15psi (about 1bar, give or take) before heat/thermal efficiency becomes a limiting factor. the ceramic ct26 may be able to boost higher, and the ct20b found in later genIII's (i believe 98+) also higher than 15psi.
and yes, each psi (assuming you're in the thermally efficient range of the turbo and the car is tuned properly) is good for roughly 10psi. dyno proven. ymmv
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Thats a pretty wide range when it comes to boost, why does it fluctuate like that? I've never heard of a stock car's boost changling like that. Well, accept for the RX-7's 10-8-10 boost pattern.
So whats the accepted amount of boost the stock injectors and fuel pump can handle?