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Eman · 01-25-2019, 09:30 AM

I use the header evac system on my car. What I have seen is if you have restrictive mufflers a header evac system doesn't work as good. On the electric smog pump setups they don't pull much vacum. They also don't like the fumes/crud pulled from the crankcase and have a tendency to fail. especially if mounted so the fumes go into the motor. If the electric is your only vent when it fails it will offer no engine breathing. The PCV/electric vacum deal looks interesting for a street driven car. I've run with a 355 at your HP level with only alve cover breathers and no problems.

01-25-2019, 09:30 AM	#5
Eman Member Join Date: May 2014 Location: E TN Posts: 473 Likes: 16 Liked 133 Times in 76 Posts	Re: Crankcase evac question I use the header evac system on my car. What I have seen is if you have restrictive mufflers a header evac system doesn't work as good. On the electric smog pump setups they don't pull much vacum. They also don't like the fumes/crud pulled from the crankcase and have a tendency to fail. especially if mounted so the fumes go into the motor. If the electric is your only vent when it fails it will offer no engine breathing. The PCV/electric vacum deal looks interesting for a street driven car. I've run with a 355 at your HP level with only alve cover breathers and no problems.