PCV Delete...

Wicked · 01-20-2005, 05:52 PM

Well,
I picked up a air/water seperator from work. Its bigger then the little ones that everyone else uses but I figured that'd be better to prevent a possible overflow condition. Anyway, I installed it tonight.

I plugged the pass. side head and connected the seperator to the driver side.

I'll watch it over the next few days/weeks to see if I get any accumulation.

Since the blower install I didn't have a complete PCV system. I had been running an open breather on one side and the PCV connection on the other. Well of course thats a huge vacuum leak.

I also tried just two breathers but they get oil soaked and start to drip everywhere. So i think this will solve my problem.

Pic...

Sendero · 01-20-2005, 06:55 PM

Is this just an experiment or are you going to re-attach your PCV system at some point?

Wicked · 01-20-2005, 07:08 PM

Quote:

Originally Posted by Sendero

Is this just an experiment or are you going to re-attach your PCV system at some point?

No, I had run without the PCV system(open breathers) for quite some time, so this will be no different. It will also eliminate pressurization of the crankcase under boost.

If you're going to bring up the tuning issue, what's the difference between closed PCV and no PCV? I'll let the long term fuel trim take care of it for now.

Sendero · 01-20-2005, 07:21 PM

Quote:

Originally Posted by Wicked

If you're going to bring up the tuning issue, what's the difference between closed PCV and no PCV? I'll let the long term fuel trim take care of it for now.

Thats another crossdrilled vs. slotted vs. blank rotors issue.

Just wondering because I am of the belief that vacumn that the PCV system creates encourages better ring sealing.

TheJeanyus · 01-20-2005, 07:23 PM

Quote:

Originally Posted by Sendero

Thats another crossdrilled vs. slotted vs. blank rotors issue.

Just wondering because I am of the belief that vacumn that the PCV system creates encourages better ring sealing.

But would the same thing be true on a boosted motor? IIRC, Wall is running twin breathers and no PCV system right now, too.

Wicked · 01-20-2005, 07:28 PM

Quote:

Originally Posted by Sendero

Thats another crossdrilled vs. slotted vs. blank rotors issue.

Just wondering because I am of the belief that vacumn that the PCV system creates encourages better ring sealing.

PCV does not use vacuum, it uses "ventilation".

But yes, racers use vacuum pumps to evacuate the crankcase to increase ring seal but they don't make that much vacuum, only a couple of inches of mercury according to my buddy.

I tried plugging one of the heads and just left the PCV connection to the intake vacuum connection and the engine starting making noise as though it was sucking air past a seal in the front of the motor. Engine vacuum is too high(or low) for evacuating the crankcase.

Sendero · 01-20-2005, 07:28 PM

Quote:

Originally Posted by TheJeanyus

But would the same thing be true on a boosted motor? IIRC, Wall is running twin breathers and no PCV system right now, too.

You're not in boost all the time...

Wicked · 01-20-2005, 07:29 PM

Quote:

Originally Posted by Sendero

You're not in boost all the time...

But isn't that when you would want the better ring seal, at maximum cylinder pressure?

Sendero · 01-20-2005, 07:31 PM

Quote:

Originally Posted by Wicked

But isn't that when you would want the better ring seal, at maximum cylinder pressure?

But isn't boost taking care of that?

Wicked · 01-20-2005, 07:35 PM

Quote:

Originally Posted by Sendero

But isn't boost taking care of that?

No I don't think so, if vacuum seals the rings and normal driving combustion(1000psi) doesn't, then how could boosted combustion(2500psi) seal them?

We should look it up.

01-20-2005, 06:55 PM	#2
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