Mikelly Posted June 16, 2000 Share Posted June 16, 2000 I drove my car over to Chris' house tonight and the car left my driveway with great fuel pressure. It got over to Chris' (6miles away) and itr was reading Zero. The carb has sight plugs on the bowls, so I checked the carb and it was fine, plenty of gas in the bowls. However, on the way to Chris' house I noticed the fuel level gauge rising and falling... I also noticed when I got to Chris' house that the fuel cell was not super Hot, but very warm to the touch. One of my mufflers is about 6 inches away from the cell, but the other is much closer, less than two inches apart... I opened the fuel cell and looked down and could see bubbles in the gas in the cell. Don't know if it is coming from the return line or what, but it has me a bit concerned. Can I put header wrap on the exhaust pipe back at the cell to help cut back on heat? Maybe that aluminum cell is to thin aluminum to help with the heat issue???? Come on guys, give me ideas... Jim Biondo's Cell is way close to his exhaust in the pics, but his cell is custom and I don't know how thin the matterial used to create the cell was made of... Car ran great though....Real strong even with the bit of smoke coming out the exhaust. That thing ever seals up and it will be a monster again!!!!!! Mike ------------------ "I will not be a spectator in the sport of life!" mjk Quote Link to comment Share on other sites More sharing options...
Drax240z Posted June 16, 2000 Share Posted June 16, 2000 Header wrap would work... You could also make a thin heat shield between the cell and exhaust. Gold foil would work the best but... ah... a little pricy maybe. Also, you should be able to find some aluminum backed fibreglass insulation easily, put the foil side towards the heat source... I would think 2" is more than enough room there with the proper insulation. Didn't you have a bunch of insulation for doing your fuel lines while you were looking forthis problem before? Wouldn't that work? ------------------ Drax240z 1973 240z - L28TURBO transplant on the way! http://members.xoom.com/r_lewis/datsun.html Quote Link to comment Share on other sites More sharing options...
DennisK Posted June 16, 2000 Share Posted June 16, 2000 Mike, I don't think 2 inches from a muffler would cause fuel to boil. Maybe if it was a cat converter it would. Try a shield as suggested or header wrap for peace of mind, but I would check all lines and fittings in the area of the bubbles. Quote Link to comment Share on other sites More sharing options...
BLKMGK Posted June 21, 2000 Share Posted June 21, 2000 Air gap is the best insulator. If you can fit a insulation pad between the cell and the muffler without allowing it to touch the muffler that would help. Whatever you do try to keep as much air gap as possible though... Quote Link to comment Share on other sites More sharing options...
MYRON Posted June 22, 2000 Share Posted June 22, 2000 Mike, I think that you should give up on the "return line" system. Maybe your regulator is bad and causing your fuel pump to just squirt fuel in circles.. I have never seen any one with the problems that you are having that is using a single line system.. I hang out with 4 guys that race all the time... In ever case it is holly blue,1/2 line to the regulator, then # 6 lines to the carb. the 57 chevy has a cell and a lingenfelter 489ci.. the 71 camaro has a 604hp 383,fuel cel and the 1/2 line and the #6 to the carb...the 70 cuda has a 468 ci and the same config... all the cars pull the wheels off the ground and I dont remember any of them having fuel delivery problems the are all #8 and 1/2 inch to the regulator then #6 to the carb all have holly blue with the supplied regulator... Myron Quote Link to comment Share on other sites More sharing options...
Mikelly Posted June 22, 2000 Author Share Posted June 22, 2000 Myron, I'd agree with you but I replaced the return style regulator with a regular dead head style Holley blyue pump and reg, and even replaced that regulator with one from BG which was not return style. The regulator isn't the issue, nor is the pump since I swapped it out for the Holley pump as well. However, AM Engineering has pointed me to the roll over vlave, and I've removed it and plan to test the car tonight and see if a regular vent line -8 in size will help vent the system properly. Mike ------------------ "I will not be a spectator in the sport of life!" mjk Quote Link to comment Share on other sites More sharing options...
BLKMGK Posted June 23, 2000 Share Posted June 23, 2000 Who's rollover valve did you use? Is it very tall? If you'd liek I can bring mine on Saturday for you to try if you think this valve is the culprit. Just seems kind of dangerous not to have one of those (sigh). Quote Link to comment Share on other sites More sharing options...
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