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No, the lowest boost you can run is the WG spring pressure setting. You could get lower boost pressures by feeding the WG signal directly off of the turbo housing, maybe 1-1.5psi less.... I have a .45bar spring in my WG. If you want to trade, let me know.........
For your fuel, I may be able to help you out..... If FMU, use the 10:1 disc and lean out with the VAFC with a good wideband hooked up. If you had an H22A4, I could tell you exactly how much to lean out, using my car as an example.
If you're interested, I have a few gauges for sale, cartech FMU and 400cc injectors.....
I almost forgot, I think 9-10psi is fine if timing is retarded, you have a J&S, and tuned to run rich. I've done 10psi daily without incident, but found my car runs so well at 8psi with lots of fine-tuning.....
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