I am unsure if the following is a contribution to the discussion. But some of the cheapy electric pumps prodcuing erratic pressure or extremly high pressure over and above the 3 to 7 pounds that a carb can take will prematurely ruin something in carb unless it is regulated.īut if the pusher pump is regulated then it's function to overcome the vapour lock may be greatly diminished.īOTTOMLINE: THe pusher pump is only FORCING cooler gasoline into the carb to cool off the carb because the vapour lock is occuring IN THE CARB or lines close to the carb. They are often used in pro racing machines too. Nothing wrong with using an electric fuel pump. The pusher pumps are a bandaid fix or more accurately a SLEDGE HAMMER fix for vapour lock occuring in the carburetor. But thus far noone will ADMIT to why the pusher pumps are used only intermiitently as opposed to full time fuel pumping. There is a REASON that the pussher pump crowd only uses the pusher pump OCCASIONALY. I know of noone using the pusher pump as a FULL TIME fuel pump on any carbureted engines. NOTE that most everyone thus far that is touting the pusher pump to eleminate vapour lock ONLY ACTIVATES the pusher pump on an OCCASIONAL basis. With the use of proper thermal barriers, you’ll reduce the chances of vapor lock fuel injection and provide more consistent and better-performing protection.Now let us get onto the so-called pusher pumps that so many are installing for older carbureted applications. This will keep the fuel in the tank cooler and less susceptible to increased temps that could affect fuel-pump operation. However, our Sticky Shields can be used around fuel tanks to protect it from heat. In these cases, installing a thermal-barrier sleeve might be difficult or impractical. Protecting under your vehicle where the fuel lines run next to frame rails or floor pans is another key area to protect for preventing vapor lock. FR Shields protect fuel rails from ambient heat coming from the top of the engine and the rest of the vapor lock engine compartment, so the fuel isn't heated to performance harming temperatures before entering the injectors. Our Heatshield Products’ FR Shields thermal barriers install around the fuel rails, shielding them from underhood heat and preventing fuel entering the rails from being heated. Solutions for Fuel Injected Vehicles Even if they're aluminum, fuel injector rails can soak in ambient heat and transfer that heat to the fuel running through them, potentially causing a vapor lock problem. Not only do these sleeves prevent vapor lock, but they also protect the engine lines themselves from heat damage. Heatshield Products Thermaflect Sleeve is an effective automotive heat barrier to protect exposed steel and rubber fuel lines in an engine compartment from ambient heat that would cause the fuel inside the lines to reach a high enough temperature to cause vapor lock. And, if you have a show vehicle and need heat protection without compromising the restored look, the Thermaflect Sleeve can be removed! A roll of Thermaflect Sleeve can be cut to various lengths, so different sections of fuel lines can easily be protected. Our engine heat shield sleeves have a built-in, high-temp hook-and-loop fastener system which prevents needing to remove fuel lines and makes installation a breeze. For carb-equipped vehicles, one of the easiest solutions to preventing vapor lock is to use a thermal-barrier sleeve on the lines such as a Thermaflect Sleeve from Heatshield Products. The solution? Protect your fuel lines from getting hot. Vapor lock typically happens during summer months when high ambient temps, combined with the heat of a vehicle’s engine and exhaust, is transferred to the fuel lines. The result is fuel starvation causing the engine to run rough or completely stall. Fuel pumps are designed to pump liquid, not air, and the increased pressure inside the fuel lines keeps the fuel pump from being able to keep the fuel moving. Vapor lock happens when the temperature of fuel gets high enough to transform liquid into a vapor state. But, proper use of thermal barriers is helpful in preventing vapor lock, no matter how hot the day gets. If you’re a racer, it can put the car on the trailer well before you’re ready to leave the track. Whether you have a carburetor or use fuel-injection in your vehicle, vapor lock can bring your vehicle to a standstill causing hours of frustration. If you’re wondering how to prevent vapor lock, try using a thermal barrier like a heat shield, or heat sleeve. How To Prevent Vapor Lock Using Thermal Barriers
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