Big Block Distributor Question

[earntaz]

Here is a couple pics of the .040 out 454 going in my 71 Nova -- had to get creative to use a serpentine setup with a 4 core radiator and long fuel pump to prevent vapor lock ... happens here in south Texas. TAZ

[HawkX66]

Wow, you put some time into that. Looks great. I'll bet she'll move too. I like those valve covers.

[L78_Nova]

Nice Work !!
What's the story behind the long fuel pump and vapor lock?? My fresh 427 67 Chevelle rag is giving me some grief. I have a carb heat shield but it still sometimes stalls and hard starts after being parked for a short period when hot out.

[earntaz]

Usually a long pump will have a third fuel return line -- from what I understand the reason is more fuel will move through the pump (some to the carb and some returns to the tank) keeping the fuel cooler. Also, the long pump appears to have more available fuel capacity. I just seems that the long pumps are not as prone to vapor lock as the short pump and I should add that is the pump used on many Chevy truck engines. Of course I had to slightly modify the front crossmember for clearance. Hope this is the answer you are looking for and I am sure others here will chime in if they deem necessary. TAZ

[WILMASBOYL78]

Taz...that inline filter is a good idea. I usually install them before the pump [area near the frame]...then change once a year. We also change the Holley [in-carb] bronze filters annually for insurance.

wilma

[earntaz]

Yep -- GM used these (sometimes three line) filters just before the carb. Also, (this will probably rile some of the troops) one of the &quot;tricks&quot; was to remove the metal filters on Holley carbs. Theory was those filters would restict fuel movement. That is bad JuJu -- Holley carbs work just fine with those filters installed in the bowls ... last defense to getting trash in the needle/seat, etc. TAZ [img]<<GRAEMLIN_URL>>/scholar.gif[/img]