The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - finally got to race! need tuning seggestions

wild one · 04-15-2008, 08:20 AM

O.K. - first thing to do is move the metal filter from before the fuel pump to after the fuel pump. By putting the filter before the pump, it can create turbulence in the fuel stream effectively aerating it. This causes the pump to lose its ability to "pull" fuel from the tank which will lead to an empty carb float bowl.

The factory style pumps i.e. mechanical pumps are meant to pull fuel from the fuel tank unrestricted (only the fuel pick-up sock should be before the pump). Once the fuel has gone through the pump it is pressurized and will flow without any turbulence through the fuel filter. After you have moved the fuel filter, re-run your truck - this by itself should do the trick. If the truck still falls on its face in third then check the fuel pressure and if possible the amount of volume the pump is suppling. You might also consider extending the 1/2" fuel line to the fuel pump to help the pump "pull" more fuel from your tank as well.

Good Luck, keep us informed with your progress.

Pete

04-15-2008, 08:20 AM	#8
wild one Registered......... Join Date: May 2006 Location: Livermore,CA Posts: 288	Re: finally got to race! need tuning seggestions O.K. - first thing to do is move the metal filter from before the fuel pump to after the fuel pump. By putting the filter before the pump, it can create turbulence in the fuel stream effectively aerating it. This causes the pump to lose its ability to "pull" fuel from the tank which will lead to an empty carb float bowl. The factory style pumps i.e. mechanical pumps are meant to pull fuel from the fuel tank unrestricted (only the fuel pick-up sock should be before the pump). Once the fuel has gone through the pump it is pressurized and will flow without any turbulence through the fuel filter. After you have moved the fuel filter, re-run your truck - this by itself should do the trick. If the truck still falls on its face in third then check the fuel pressure and if possible the amount of volume the pump is suppling. You might also consider extending the 1/2" fuel line to the fuel pump to help the pump "pull" more fuel from your tank as well. Good Luck, keep us informed with your progress. Pete __________________ 1966 C10 panel-400 small block/TH 350 combo Nothing is fool proof to a talented fool! Popcorn: Pops at exactly 444 degreese Expands to 44 times it's original size Has a 4 year shelf life Last edited by wild one; 04-15-2008 at 08:21 AM.