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Vapor Lock??????

2218 Views 2 Replies 2 Participants Last post by  NT0LERANCE
I'm lookin for some help. This past winter I replaced my tired old 318 with a built up 360. I have Hooker headers, an Edelbrock performer intake with a Carter competition series 750 cfm carb. It works great. Once the weather started getting warmer and when the motor is warmed up, I have noticed that it seems to starve for gas when accelerating after letting it sit idling for awhile or if I shut it off for a short period of time then get in and go again it will die out several times until I get going down the road so that the air must be cooling it down. I even tried a nonmetallic 1/2" spacer between the intake & carb. I also replaced the fuel line with thick rubber hose and re-routed it further away from the headers and to the outside of the frame rail away from the exhaust pipes. It just seems that it is vapor locking. Any ideas or anyone else experieced this trouble?????? Help!!!
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My dad used to have a 73 Ford F-100 with a high horsepower 428 in it. He had to swap carbs from a Carter AFB to a Holly 750 in the summertime because the truck would vaporlock with the Carter even after installing an electric fuel pump. It always ran fine in the winter with the Carter though. Could be that you're having the same problem.
Trans-dapt used to make a heat/spacer kit for square flange carbs. It had small aluminum spacers alternated with gaskets. The top spacer was very large and nearly went to the valve covers on a 340 I had. This helped the boiling on the 750 carter comp carb I had. Aluminum dissipates heat better than steel although not as well and phenolic or wood. I'm not nitpicking here, but whats the longetivity of a wood spacer? I dont think plywood would work, id be afraid with would fall apart due to the heat and possible gas contamination. Perhaps hardwood? Ive also thought about underhood temps being a problem on any engine no matter the size of compartment. I was thinking of going to a junk yard and removing two of the louvered vents from the hood of one or two mopar fwd turbo cars and installing them in the hood of my truck. they could be positioned over the hottest parts of the engine, being that heat rises, this should theoretically lower underhood temps. A heat gun could tell you the hot spts, but clearly, hedders would be very hot. They were installed on the first generation of turbo cars right above the turbo. Makes sense at any rate.
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