Hi All,

Progression on the EFI install. New larger fuel line required (out). Running a return line set-up regulating the return side. 

Question: can the or has anyone used the crank PCV valve vent line running on the driver side to the vent tank (rear) as fuel line? 73 240z. Believe this hard line is 5/16?

Planning on running a crank vent can so the vent line will be terminated and removed. 

Thank you. 

What is a crank vent?  And a crank PCV valve vent line?  Not sure what you're talking about.

See pic, steel line at bottom of the pic runs from the driver side to the rear vent tank (rear pillar) . two vacuum line connectors (top of pic) one for the crank vent tube the other to the air cleaner. 

Question: can the or has anyone used the crank PCV valve vent line running on the driver side to the vent tank (rear) as fuel line? 73 240z. Believe this hard line is 5/16?

73 240z.

Edited September 28, 20213 yr by Zed Head

Hi All,

Searched brake lines fittings, could not find the answer. Brake line fitting tread size and pitch? Ton data on the hex size (11mm or 10mm) but not the actual thread size and pitch for the fitting. Need to build a single brake line.  

Thank you, 

73 240Z 

47 minutes ago, Blitzed said:

Hi All,

Searched brake lines fittings, could not find the answer. Brake line fitting tread size and pitch? Ton data on the hex size (11mm or 10mm) but not the actual thread size and pitch for the fitting. Need to build a single brake line.  

Thank you, 

73 240Z 

https://www.zcar.com/threads/brake-line-size.58963/

Hi Steve,

Thank you. 

6 hours ago, Blitzed said:

Hi All,

Searched brake lines fittings, could not find the answer. Brake line fitting tread size and pitch? Ton data on the hex size (11mm or 10mm) but not the actual thread size and pitch for the fitting. Need to build a single brake line.  

Thank you, 

73 240Z 

Most auto parts stores have a selection of pre-fitted brake lines of various lengths.  You can take your old parts in and compare and test fit.  Use a piece of wire or string to run down your old line to get the length.

Hi Zed,

Thank you. 

Hi All,

Hope all is well. Question on proper crankcase venting on a L28 NA . In the home stretch (positive thoughts) on the EFI /ITB conversion. Final issue to address is crankcase venting with the stock pcv valve removed from the manifold position.

Is the stock config a open or close system? Would the stock hose and PCV valve to the manifold be considered a close system? as the PCV valve will open and close only under pressure changes.

If pressure escapes to the valve cover and the vent hose is connected to the back of the air filter housing, wouldn't this be considered an open system?

So is a duel catch can set-up required or will a single vented can work? 

Maybe over thinking this issue, this is a lower HP engine (NA) non boosted. 

Thanks for your help. 

Run the valve cover vent and PCV to a catch can with a breather.

22 minutes ago, SteveJ said:

Run the valve cover vent and PCV to a catch can with a breather.

Like this:

Center bottom of picture.