[DeTomaso] Crankcase Evacuation System

[Nolan Scheid]

Hello Larry
Here is a good description of what to expect:
http://nutterracingengines.com/racing_oil_pumps/crankcase_vacuum_facts.html

http://arcracing.blogspot.com/2008/04/crankcase-vacuum-system-cvs.html

There are several informative links when you Google:  Crankcase Vacuum Power . 

The Nutter racing link cites 15 HP. That is probably an honest number from my memory. 

Take care,
Nolan


----- Original Message ----- 
From: "Larry - Ohio Time Corp" <larry at ohiotimecorp.com>
To: <JDeRyke at aol.com>; <chendric at bellsouth.net>; <detomaso at realbig.com>
Sent: Thursday, September 24, 2009 2:17 PM
Subject: Re: [DeTomaso] Crankcase Evacuation System


> 
> I think we need to look at this a bit closer.
> 
> The motor does not need air circulation. It needs to release any pressure
> from, blow by, gasses from the cylinders. If not it will blow a seal to
> relieve it self (much as I do from time to time). In a motor that has
> pollution equipment on it, the gases are burned with the PCV (positive crank
> ventilation) system. I think the PCV systems helped the motors of the '60s
> keep there insides cleaner then the motors of the '50s, that had vent tubes.
> 
> If you have a standard carb, run a PVC system. If you race your car and keep
> the R's up you will have more blow by and maybe need to run both. I know
> some of the racers have oil leaks at high Rs from the pressure. It has also
> been proven that you do gain some HP by having a vacuum in the crank case.
> 
> Now when you have a motor like me, Webers and 180's. I plan on running a
> crank case vacuum pump and the vent tubes back to the 180s.
> 
> Time will tell.
> 
> 
> Larry - Cleveland