SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: dopeyest1 on July 01, 2010, 11:05:32 PM

Title: PVC or Breather With A Tunnel Ram
Post by: dopeyest1 on July 01, 2010, 11:05:32 PM
OK - let's hear how you guys are doing it. I just put a TR on my 460 Ford and am wondering if I should go with PVC or breather. The old setup up on it used a PVC.
Title: Re: PVC or Breather With A Tunnel Ram
Post by: GT Jets on July 01, 2010, 11:10:09 PM
OK - let's hear how you guys are doing it. I just put a TR on my 460 Ford and am wondering if I should go with PVC or breather. The old setup up on it used a PVC.


It is My humble opinion that a PCV will not have near the volume required for a high revving marine engine, the load is too great at WOT and the crankcase pressure can build causing all sorts of issues....

A PCV valve is actually an emissions device and work killer on tight engines with higher vacuum levels than what we typically see.

I would breather both heads and if you wanted to, use MOPAR type breathers and run a hose to the scoop, or even a puke tank.

But then again, that's just me. :-\

GT
Title: Re: PVC or Breather With A Tunnel Ram
Post by: IRRebel on July 01, 2010, 11:27:12 PM
X2. Unless you're having excessive crankcase pressure issues, breathers are fine.  otherwise, a puke tank is a good idea. Putting one of those on the Charger I just picked up. WAY to high crankcase pressure.

Ray
Title: Re: PVC or Breather With A Tunnel Ram
Post by: 88CARRERA on July 06, 2010, 09:58:02 PM
i ran the boat with the new tunnel ram and pcv set up and there was 3 quarts of oil in the bilge and have no clue where it came from???????????????????????????????? the dip stick tube is the coprit i think
Title: Re: PVC or Breather With A Tunnel Ram
Post by: GT Jets on July 06, 2010, 10:04:32 PM
i ran the boat with the new tunnel ram and pcv set up and there was 3 quarts of oil in the bilge and have no clue where it came from???????????????????????????????? the dip stick tube is the coprit i think

A lot of crankcase pressure will push oil right out of the stick tube.

Excessive windage will do that too...

GT
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