Fuel vaporizing issue

[cudabob496]

This little puppy handles my 850DP Holley and 600+ hp just fine. Pressure is a steady 6.5 psi,
with no regulator.

http://www.summitracing.com/parts/crt-m4862/overview/make/plymouth

if need regulator, this works good:

http://www.summitracing.com/parts/hly-12-803/media/images

[BS CUDA]

This little puppy handles my 850DP Holley and 600+ hp just fine. Pressure is a steady 6.5 psi,
with no regulator.

http://www.summitracing.com/parts/crt-m4862/overview/make/plymouth

Yup - for now!! I ran that way just fine for awhile and then one day................ I now run with a bypass reg - 1/2" feed and 3/8" return.

[cudabob496]

Yup - for now!! I ran that way just fine for awhile and then one day................ I now run with a bypass reg - 1/2" feed and 3/8" return.

ya, I don't go to the track, just run on the street

[ff6849]

update, installed the holley blue pump with return regulator, upgraded to a 3/8 supply line in-place of the 1/4 vapor return line using the old 5/16 supply line as my return. Pump is noticeably loud at idle but not at cursing speed. Car runs much better no more vaporization issues and it seems to have much better throttle response.   

[brads70]

   Glad to hear you got it sorted out!
 I'm betting you will get sick of the noise of the Holley pump soon though. FYI the Mallory pump is MUCH quieter.

[MEK-Dangerfield]

 I'm betting you will get sick of the noise of the Holley pump soon though. FYI the Mallory pump is MUCH quieter.

You won't even hear the Mallory fuel pump with the engine off.   

[msbaugh]

How do some of y'all run return lines with mechanical fuel pumps? Can you even run A bypass style regulator with the mechanical fp? I've just got the charcoal canister with my mechanical Holley pump. 3/8 feed- 1/4 return

[drewcrane]

How do some of y'all run return lines with mechanical fuel pumps? Can you even run A bypass style regulator with the mechanical fp? I've just got the charcoal canister with my mechanical Holley pump. 3/8 feed- 1/4 return

I have the same question , can and how can I run a return line with a factory mech. pump? in the past I have run a fuel iflter with two outlets and run one back to the tank m\but there has to be a more sanitary way if possible?

[cudabob496]

I have the same question , can and how can I run a return line with a factory mech. pump? in the past I have run a fuel iflter with two outlets and run one back to the tank m\but there has to be a more sanitary way if possible?

don't think you need it. You can buy the appropriate size mechanical pump to give you the 6.0 to 7.5 psi you need at your carb. And if you're
getting more than 7.5, you can add a cheapy Holley regulator for about $30.

[drewcrane]

don't think you need it. You can buy the appropriate size mechanical pump to give you the 6.0 to 7.5 psi you need at your carb. And if you're
getting more than 7.5, you can add a cheapy Holley regulator for about $30.

Ok so run the factory set up ,with out a return line,see how it runs,and if I have issues hook up the return line,

or run the return line with the factory set up with a fuel filter with two outlets and see what my fuel pressure is .
 

My biggest concern is vapor lock with the fuel here has 10% alcohol

[cudabob496]

Ok so run the factory set up ,with out a return line,see how it runs,and if I have issues hook up the return line,

or run the return line with the factory set up with a fuel filter with two outlets and see what my fuel pressure is .
 

My biggest concern is vapor lock with the fuel here has 10% alcohol

I think if you run the line away from heat sources, you will be ok.
you can also insulate part of the line if necessary. I insulate the part
of mine that gets blasted with hotter air from the radiator. I have a gauge
inside my car similar to this:

http://www.summitracing.com/parts/atm-3361/overview/

[drewcrane]

ok I will take your advice and do more of a factory set up and see how it does I can always add an electric pump later ,thanks for the help