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Will not having a needle valve and just the Daws valve have any effect over the boost control? Reason I'm asking is that on the freeway, 100KPH, tonight I noticed the boost would sit on 12psi and the EGT's were about 300 then the boost would drop down to 5psi and the EGT's would start to rise to 450, all this would happen without even changing RPM. If I then back off the boost would climb and EGT's would fall. Will a needle valve help control the boost and create a more linear boost curve?
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