Sometimes bandaids are all that can be done. The pump will pull fuel and the check valve is a must IMHO lest the pump run dry every time you fire up. I'd try to keep the suction side as short as humanly possible... as in a foot or so. You may also want to increase that short supply side to a -8 so there's more volume of fuel to start with.
Greg in order to avoid the check valve how far does the pump have to be below the top of the fuel cell to avoid using a check valve? Also the feed line will be -8. thanks
You'd have to be taking fuel from the bottom of the tank (or near the bottom). As it is - if you're taking fuel from the top fitting on the tank you're already "lifting" the fuel so as the tank empties - you're lifting it ever higher. That's okay back when everyone was running MANUAL fuel pumps because they were built for suction. Electric fuel pumps are built to PUSH the fuel and this is when the issues start. With the volumes and pressures that are needed for fuel injection and the fact that you don't have a "fuel bowl" for a reserve you can't have hiccups in the fuel delivery system.
I'm no expert in this and was hoping that maybe someone else might chime in here and lend some "expertise". When I switched to EFI cars years ago I added sumps to my fuel tanks and took the fuel from the bottom of the tank - or did an internal pump in tank.
Well after talking with Holley I will find a spot lower than the fuel cell and it should be fine without a check valve. Now the hard part is to recant my statement I can not to I will find a way to mount the pump below the fuel cell. Greg thanks for your inputs!!.
Well after talking with Holley I will find a spot lower than the fuel cell and it should be fine without a check valve. Now the hard part is to recant my statement I can not to I will find a way to mount the pump below the fuel cell. Greg thanks for your inputs!!.
Funny --- glad it worked out -- it's all part of learning - and HOT RODDING... if it was easy - everyone would be doing it.
Vstol I feel your pain! A buddy of mine is going through the same thing with his 67 Barracuda....no room unless it's mounted in the back where everyone would see it. He's actually looking into the PA series pumps from Tanks.
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