speedjunkie
10-15-2017, 10:14 AM
I've been looking for an anti-slosh solution for a while, but nothing so far has met all my wants and needs and I think I've finally figured out what I want to do. I'm currently using dual Walbro 450s and they each feed one of the fuel rails as of right now. I'd like to switch it back to both pumps feeding both fuel rails, but I need to sort out the pulsation issue I had before with that setup, whether it be a larger fuel rail or what. I'm not using flex fuel yet but the car is set up for it. I may not ever use it, I'm not sure yet.
I'm planning on building a little tank from stainless steel that sits in the stock plastic box, and I'll run a hose from each fuel pump to that tank. From both sides of the tank will run a line (probably stainless hard line) to a Holley Hydramat at the far ends of the tank on both sides, using a one way check valve on each line just before the tank. I will run a stainless hard line from the return line back to the tank as well, dipping down to the bottom of the tank so the return fuel can be cooled a little by the rest of the fuel in the tank. I will also put a lid on the top because I'll have to fill it with fuel first since it will be a sealed system, and because of all this I will probably also put a one way check valve going out the top so excess fuel or pressure can be leaked out into the main tank. I've also thought about scraping the protective coating off the bottom of the tank and attaching heat sinks to cool the fuel.
Because it will be a sealed system, it will be pulling the fuel back through the return line instead of just flowing normally. Theoretically, whatever amount of fuel I put into the surge tank to prime it, should be the amount it always has regardless of the load on the engine. Although it might not be a good idea running the return line straight to it, because the return will flow different rates depending on engine load. I imagine it will suck fuel out under heavy throttle, but light throttle or idle I wonder if it will back up in the line. However, whatever the flow in the return line is should mimic whatever the pumps are doing, so maybe that's a non-issue anyway.
Thoughts? What factors am I not considering?
I'm planning on building a little tank from stainless steel that sits in the stock plastic box, and I'll run a hose from each fuel pump to that tank. From both sides of the tank will run a line (probably stainless hard line) to a Holley Hydramat at the far ends of the tank on both sides, using a one way check valve on each line just before the tank. I will run a stainless hard line from the return line back to the tank as well, dipping down to the bottom of the tank so the return fuel can be cooled a little by the rest of the fuel in the tank. I will also put a lid on the top because I'll have to fill it with fuel first since it will be a sealed system, and because of all this I will probably also put a one way check valve going out the top so excess fuel or pressure can be leaked out into the main tank. I've also thought about scraping the protective coating off the bottom of the tank and attaching heat sinks to cool the fuel.
Because it will be a sealed system, it will be pulling the fuel back through the return line instead of just flowing normally. Theoretically, whatever amount of fuel I put into the surge tank to prime it, should be the amount it always has regardless of the load on the engine. Although it might not be a good idea running the return line straight to it, because the return will flow different rates depending on engine load. I imagine it will suck fuel out under heavy throttle, but light throttle or idle I wonder if it will back up in the line. However, whatever the flow in the return line is should mimic whatever the pumps are doing, so maybe that's a non-issue anyway.
Thoughts? What factors am I not considering?