Oil dip stick

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Oil dip stick

Post  gmsmkr on June 5th 2016, 7:43 pm

Blows out when i pull 2ND gear right after burnout .... no smoke from headers the plugs are clean and dry

What im working with is a

472" scj heads
10.8 comp
Alky m1 fuel
Header evacuation

Why is the oil dip stick blowing out under load. It will do this with evac unhooked also
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Re: Oil dip stick

Post  6jeff6 on June 5th 2016, 7:55 pm

Need evacuation pump I think. My 521 smokes at 6,000+ and I have the evacuation to the back of header to. You must have more pressure
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Re: Oil dip stick

Post  gmsmkr on June 5th 2016, 8:04 pm

I was thinking the same thing but it doesn't smoke out the headers
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Re: Oil dip stick

Post  6jeff6 on June 5th 2016, 8:19 pm

I don't get any issues until I'm in 3rd at the end of the track so maybe your system is working great up top but is letting the pressure stay down low? Hopefully someone can help that has had this issue but all I have seen is vacuum pump to solve it if vent system fails.
Did you get bung in the collector and have a muffler not to far after?
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Re: Oil dip stick

Post  gmsmkr on June 5th 2016, 8:40 pm

No mufflers on this deal
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Re: Oil dip stick

Post  whitefield on June 5th 2016, 8:54 pm

Check and see if your evacuation tube has vacuum on one of the filter / breather where it goes in the Valve cover at idle.

Piston rings may not be seated. Just a thought!
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Re: Oil dip stick

Post  6jeff6 on June 5th 2016, 8:57 pm

My understanding is no muffler, evacuation doesn't happen. Could be why you're not getting oil out exhaust and I am?
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Re: Oil dip stick

Post  gmsmkr on June 5th 2016, 9:04 pm

whitefield wrote:Check and see if your evacuation tube has vacuum on one of the filter / breather where it goes in the Valve cover at idle.

Piston rings may not be seated. Just a thought!

Both are pulling vac... it didn't do this on AV gas but I did a cam swap and the alky swap all at once
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Re: Oil dip stick

Post  cool40 on June 5th 2016, 10:07 pm

A vacuum pump is a very good idea with alky.
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Re: Oil dip stick

Post  rmcomprandy on June 6th 2016, 8:18 am

Excessive blow-by originating from somewhere. With alky it a lot of times is bad exhaust valve guides or ring seal.

Vacuum in the crankcase will help this situation but, it needs to be fixed.

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Re: Oil dip stick

Post  gmsmkr on June 6th 2016, 12:30 pm

Thanks for all the help I think I'm going to swap back to gas and see what it does beings I need a carb anyway.

It just throwing me a loop cause the motor didn't have many miles on it before the cam and alky swap... most about 150hrs before all the change
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