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Anyone with a Hypertune and big cam's please chime in as to what kind of vacuum your pulling. I'm getting like 10 inches. Is this pretty normal for FFIM and big cams?
 

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Yes, cams reduce vacuum at idle. There's rarely such thing as a free lunch. If your cams improve power at high rpm then efficiency at low rpm is going to suffer, hence the low vacuum.
 

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Reverend Hillclimb
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If you look it up alot of muscle guys run hydroboost units instead of normal brake boosters and vacuum pumps for any vacuum sources.
Big cammed setups affect them so much they cant use traditional boosters sometimes
 

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I blame the Midwest Sect.
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1,097 Posts
I am usually around 10-12in/mg with the HKS 280s.
 
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