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Don't waste your time with the double dawes setup. Theres not much difference between 10 and 15psi, or there abouts. I did it but found I just kept it on the higher boost setting so I ripped it out. The was no difference in fuel eco between the two settings and power difference I could notice it, albeit small, so it stayed on the higher setting.
Your best off installing a needle valve along with the dawes to control the spool up rate of the turbo, getting a better zorst and chip.
Mark.
Edit : keep the block in nisshead. Your doing your engine good with it in.
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