Will airtex E8012s or E8016s work on a carbureted 350 with a 600 cfm edelbrock carbur

[edwardgonzalez]

My 81 c10 always smells rich and I could never find the cause. I now know that edelbrock carbs can only handle about 5.5 psi fuel pressure. My stock pump is doing about 7 or 8. I am planning on using airtex part number E8012s which is an electric pump psi range of 5-9. Or part number E8016s which has a range of 2.5-4.5. I know everyone says to stick with mechanical pumps but I've had nothing but problems with mine so I'm switching to one of these. I also know that there are better electric pumps but these have a lifetime warranty at autozone so if they mess up I can just swap it out for free. I plan on using a fuel pressure regulator with either. Will the 2.5-4.5 pump be too low for my 350? Would the 5-9 pump be too much pressure? What pressure is ideal?

[gmachinz]

Stock pressure is anywhere from 3.5 to 5.5 so you'll need a regulator for any pump over 6 psi. If you run too high of a fuel pressure, the fuel bowl or well will be too pressurized which won't let the needle/seat assembly stay seated at idle or low speed when the carb doesn't require more fuel. The result will be a stinky rich fuel mixture and you'll be fouling plugs left and right while having a stumbling idle.

I'd say use a regulator at set it at 5 psi to start with for a stock-ish 350...better cam/intake/heads go to 6-6.5