<VV> Vapor Lock

[Norman C. Witte]

> >But if it is vapor lock, what can I do to avoid this, short of getting an
> >electric fuel pump somewhere forward of the engine compartment?  It's not
> a
> >tolerable condition.
> 
> Cars with a/c received a return fuel line to limit pressure build up and
> to
> keep the gas circulating in the system. The factory did not add cost like
> that without a reason. That said where I have seen VL in the past was from
> a fuel line too close to the block. That should not be an issue with a
> Corvair.
> 
> Electric pump should be an option since one mounted near the tank is
> getting cool liquid and pushing (easier than trying to pull on a gas).
>

Not my first choice if I can avoid it.
 
> That said do you have the phenolic block spacer under the carbs ? Even at
> 425 the carb/line temp should not be an issue since above the shroud (does
> leaving the hood open when stopped make a difference ?)
> 
 
I just have the gaskets Clarks sold me for the turbo.


> Might want to put a fuel pressure gauge in the line (another reason to
> have
> a four way block) and see what is going on, could have a generally weak
> pump that is OK until experiences a hot soak.

That is a possibility.  As I said, the pump is new but that doesn't
necessarily mean anything.

> 
> If you want to avoid the quick fix (an electric pump) then knowing what is
> really happening is essential.
> 
> ps just as a shot in the dark, might disconnect both ends of the fuel line
> to the tank and blow it out, could be partly clogged.

I did blow it out at one time, and the same with the return line.  This did
not seem to make a difference.

Norm