Crank case moisture

[Super73]

I recently tore my 418 LS motor down and made some changes. One big change is I am on E85.

Pistons are set with .0045 clearance and rings are gapped 28/32 as I am intending on spraying it down with 300-400hp on n20.

I have also installed a vacuum pump with catch can.

The tune was fairly rich up until now, I have aprox 50-75miles on it getting part throttle leaned out and working in to WOT. When first driving I was collecting a lot of moisture in the catch can, as much as 3oz with in 6-8 miles. That has now been reduced to roughly 1oz in roughly 15 miles.

I pulled the oil filler cap off tonight and there is a good amount of foam collected in the cap and filler neck.

My vacuum pump pulls from a modified LS3 valley cover using a -12 line to the pump but there is nothing tieng to to the valve covers which are technically the highest point. I think the moisture is collecting there for that very reason.

Thinking about hooking the valve covers up the the pump as well but I am curious as to what others are doing.

Everything is sealed and I can only attribute the moisture to the fuel and blowby.

Thought, ideas and suggestions are definately wanted.
Posted via Mobile Device