Original 66 mustang with 289 2v just added a Edelbrock Performer intake and Edelbrock 600cfm 4 barrel carb. Do I need to do anything with the PCV valve on passenger side valve cover? Can I cap it or does it need to be hooked back up to the carb?

 

You may find some different opinions on this, but it is my opinion that a functional PCV setup is a must. A PCV system keeps a volume of air moving throught the crankcase thereby minimizing the condensation of combustion gasses (blowby) in the crankcase. If these combustion gasses are allowed to condense in the crankcase acids and varnishes are more likely toacumulate and cause crankcase deposits and corrosive effects on gaskets and seals. Additionally, the small amout of vacumne applied to the crankcase reduces the severity of oil leaks.

It has also been said that a functional PCV setup actually slightly improves power output.

 

yes you need one or else you'll get excessive blowby on your drivers side valve cover and it's not fun to clean up. I just made my own out of fuel hose from NAPA. I plan on making one outta brake line once i get new valve covers.

 

use one i took mine off once and then drove 40 miles and then there was a big mess

 

hook up on carb or in take again !!!!

arthur

 

Get a spacer with the PCV hookup on it.

 

Yup, the PCV draws a vacuum on the crankcase, so no PCV=oil leaks, sludging, varnish, rust(possibly), corrosion/pitting etc etc. There's a reason those smart engineers put them there(though "smart" is debatable depending on who you ask)

 

it also helps your rings last longer

 

Yeah, without a PCV if you get a lot of positive crankcase pressure it'll push back up against the bottom of the rings, and could cause flutter, and the rings won't seat properly in the landsand will wear faster

 

The original reason all those 'smart' engineers put them there was under U.S. Gov't orders back in 1963 or there abouts. Everyone hated them until they were proven to free-up about 15 horses in a 383 Plymouth.