pcv valve
#2
Senior Member
DYNO OPERATOR
Join Date: Apr 2008
Posts: 504
Street engine or a racing engine?
Race engines do not use PCV valves. Oily air drawn in the intake from the crankcase in a racing engine is a bad thing and does not provide any crankcase vent at WOT when you need it the most for ring seal etc. Use a header evac vent or two large breathers, one on each valve cover would be better than a PCV in a racing engine.
If you are a street engine application then use a PCV with the highest spring pressure and smallest hole or restrict the hose inner diameter to prevent drawing in too much air volume, use a large breather on the opposite valve cover for street applications.
Bruce
If you are a street engine application then use a PCV with the highest spring pressure and smallest hole or restrict the hose inner diameter to prevent drawing in too much air volume, use a large breather on the opposite valve cover for street applications.
Bruce
#3
Senior Member
MASTER BUILDER
Thread Starter
Join Date: Mar 2008
Posts: 173
pcv
thanksa bruce. it is a street engine and i will need to use the pcv setup. any idea how i could locate the pcv you described (heaviest spring and smallest hole).any certian cars that you know of would call for a pcv like this one. just out of curiosity, why the heaviest spring and smallest hole? thanks art
#6
Senior Member
RACING JUNKIE
Join Date: Mar 2006
Location: EUGENE,OR.
Posts: 3,391
Re: pcv or pvc
Originally Posted by chevyart
hey rabbit i always make myself say pos crank vent before i write the initials pcv, or else a will write pvc, which i used to do all the time art
So true!!!!!! It's like I was a plumber in my past life or something... comes out of my mouth pvc every time no matter what.
#7
Re: pcv or pvc
Originally Posted by Rigsby
Originally Posted by chevyart
hey rabbit i always make myself say pos crank vent before i write the initials pcv, or else a will write pvc, which i used to do all the time art
So true!!!!!! It's like I was a plumber in my past life or something... comes out of my mouth pvc every time no matter what.
#9
Junior Member
SHOW GUEST
Join Date: May 2011
Posts: 1
If you got long tube headers and good flowing exhaust setup use a crankcase evacuation kit or turn a smog pump into a crankcase vacuum or just stick some breathers on your valve covers. Contaminating your intake charge with hot blow by is just disgusting. And creating a vacuum in your crankcase lets them rings seal better lowering blow by and reduces the air resistance that the oil slinging off the crank loves to grab ahold of.