I'm getting some serious fumes inside the car. I think I know where they are coming from but wanted some opinions.

I switched from a 305 TBI to a 350 with a 650 Edelbrock and many other mods. I got rid of the pcv and have two open element breathers on the valve covers. I also put on a “lift off” Harwood cowl induction hood.

I think the fumes are coming from the valve covers, going out the hood cowl, down into the heater vents. It is the worst when I am sitting in traffic with the defrost on. It seems to be ok going down the road when fresh air is forced into the vents.

I’m trying to decide on sealing off the hood cowl to make it fully functional (a lot of work) or put evacuation tubes on the car. What do you guys think?

 

why not just put a pcv valve on it?

 

Your right about the smoke coming from the valve cover. I take it you are running an open air element. How does your breather cap look on the valve cover? Are they oily as well? I have the same problem with mine, a bad valve seal.

 

Fumes are ionic and molecular metal particles, usually liberated from the surface of metal by heating. Vapors and gasses are more likely what you are smelling.

You really should install an operating PCV system, unless you change your oil very frequently. It will probably at least help if not eliminate the odors, and will certainly help keep you oil and engine cleaner.

Lacking a cowl seal at the rear edge of the hood, your ventillation system will draw all kind of hot, smelly, nasty air into the ducts and pump it into your car. Rain will also have lots of fun with the distributor and coil.

 

Problem solved! I put evacuation tubes on it this weekend. Everything went well and no more fumes...excuse me...vapors and gasses....no offense vader.