GMCforum
For enthusiast of the Classic GMC Motorhome built from 1973 to 1978. A web-based mirror of the GMCnet mailing list.

Home » Public Forums » GMCnet » My 1976 Palm Beach Project  () 2 Votes
Re: [GMCnet] My 1976 Palm Beach Project [message #319750 is a reply to message #319748] Thu, 29 June 2017 10:22 Go to previous messageGo to previous message
Justin Brady is currently offline  Justin Brady   United States
Messages: 769
Registered: April 2015
Location: Bell Buckle, TN
Karma:
Senior Member
Next issue is that on the 5hr drive there and back I experienced vapor lock. With the Fitech Fuel command center and all.
The FCC is mounted beside the radiator in full air flow visible from the front of the grill.
Outside temp was ~95 on fresh new hot blacktop. Slowed me to 35 on the interstate with the sputtering and surging. Electric backup pump worked for a while then even that wouldn't work.

I am convinced that the vapor lock was happening IN the FCC and not in the lines. The fuel pump in there was overheating the fuel and causing it to boil.
To remedy this when I got home I gutted the FCC. By that I mean I removed the float valve and gutted the check overflow valve. I then routed a fuel line from the overflow back to the fuel filler.
The way it's setup now the FCC acts as a sump or surge tank instead of a heat reservoir. The fuel pumps in from the mechanical pump and then the overflow goes back into the tank. This constant re-circulation should keep the fuel in the sump nice and cool (we hope!)

I have not driven it far enough to fully test, but a 30 minute idle saw a significant decrease in temperature of the FCC before and after. Before I couldn't hold my hand on the FCC after 30 minutes Idling. After it's still warm but no issue to hold my hand on it indefinitely.


Justin Brady http://www.thegmcrv.com/ 1976 Palm Beach 455
 
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: [GMCnet] GMCMI Fall Convention - Can only come for couple of days?
Next Topic: Re: [GMCnet] EV6010 Stalling
Goto Forum:
  


Current Time: Sun May 12 10:51:40 CDT 2024

Total time taken to generate the page: 0.02025 seconds