You are only running about 10inHg on vaccum, should be more like 20-22. I would definitely say you have a boost leak.
- you arent going to make any boost sitting idle, gotta drive it to do that.
- Is your MAF setup draw through or blowthrough?
- are you familiar with how to do a boost leak test?
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5.3 V8 Swap w/ Nitrous
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