After installing tthe simplistic Hallman MBC,,, Ist run I could only get about 5# out of it,, the guy I bought it from told me he had it set at 13#,, so I figure, well maybe it somehow got turned down a bit when I was admiring it for 2 months before installing.... sooo I do a couple turns on it,,, maybe 6/7 lbs.... well this evening ,, its much cooler,, I cranked it up a bit on long stretch of rd. here in no. va... well after cranking it till it wont turn any more,,, 10#, with a spike to maybe 12,,,, Car has a S/T 17# chip, full down pipe and exhaust ,, before I installed the mbc,,,, 17lbs easy,,,, I caped the vacum, nipple on the inlet tube and from the directions I've read here on line,,wasnt really necessary to cap the 3 ports on the Electronic boost controller, fairly new vacum lines,,,, Am I missing something ???? Any ideas ????