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The Terminator
Engine/Tuning
changing up fuel system ditching the A1000 could use some input!
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<blockquote data-quote="keith89" data-source="post: 14320520" data-attributes="member: 53797"><p>Instead of switching fuel pumps, change how your lines are routed. I had the same issues with fuel being overheated. When i first when return style with dual external walbro pumps. I battled burned out pumps for a year. after replacing 3 pumps and being stranded due to overheated fuel causing fuel pressure issues, I decided to find the source of the fuel heat. It turns out the fore innovations fuel rails were sucking up engine heat and transferring it to the fuel. Like most people with return fuel systems, I had a flow through setup where the fuel flows through the back of the rails and exits the front to the regulator and returning to the tank. The problem with this, is the fuel is constantly circulated through the hot rails and getting hotter and hotter until you have fuel boiling and pump cavitation issues(does not affect return systems with fuel pumps in the tank as much). External fuel pumps may have to suck fuel at times causing a low pressure area in the fuel line just before the pump. Gasoline has a low boiling point, so hot gas + vacuum = vapor lock.</p><p></p><p>I fixed this by going with a dead head return system. I capped the front of each fuel rail and have the rears fed by the pressure side of the circuit before the regulator. Therefore, the fuel does not constantly circulate through the rails to soak up heat. My fuel pressure is actually more stable and my pumps(now a single magnafuel) stay cooler. This setup is also cheaper as it requires less hose and fittings. It is also a neater setup as you do not have the crossover hose around the supercharger or hoses hanging off the front of the fuel rails. Many people warned me this setup would not work as they believed the injectors would not be supplied the correct fuel pressure since fuel is not constantly flowing through the rails. Their explanations did not make sense. As fuel is released through the inejctors, it is backfilled with more fuel since it is under constant fluid pressure.</p></blockquote><p></p>
[QUOTE="keith89, post: 14320520, member: 53797"] Instead of switching fuel pumps, change how your lines are routed. I had the same issues with fuel being overheated. When i first when return style with dual external walbro pumps. I battled burned out pumps for a year. after replacing 3 pumps and being stranded due to overheated fuel causing fuel pressure issues, I decided to find the source of the fuel heat. It turns out the fore innovations fuel rails were sucking up engine heat and transferring it to the fuel. Like most people with return fuel systems, I had a flow through setup where the fuel flows through the back of the rails and exits the front to the regulator and returning to the tank. The problem with this, is the fuel is constantly circulated through the hot rails and getting hotter and hotter until you have fuel boiling and pump cavitation issues(does not affect return systems with fuel pumps in the tank as much). External fuel pumps may have to suck fuel at times causing a low pressure area in the fuel line just before the pump. Gasoline has a low boiling point, so hot gas + vacuum = vapor lock. I fixed this by going with a dead head return system. I capped the front of each fuel rail and have the rears fed by the pressure side of the circuit before the regulator. Therefore, the fuel does not constantly circulate through the rails to soak up heat. My fuel pressure is actually more stable and my pumps(now a single magnafuel) stay cooler. This setup is also cheaper as it requires less hose and fittings. It is also a neater setup as you do not have the crossover hose around the supercharger or hoses hanging off the front of the fuel rails. Many people warned me this setup would not work as they believed the injectors would not be supplied the correct fuel pressure since fuel is not constantly flowing through the rails. Their explanations did not make sense. As fuel is released through the inejctors, it is backfilled with more fuel since it is under constant fluid pressure. [/QUOTE]
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Engine/Tuning
changing up fuel system ditching the A1000 could use some input!
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