I'm going to be putting a Weiand 142 on my 305. I picked up a Proform 750 carburetor for a good price to put on top. Right now I've got a mechanical 110gph fuel pump. Will this pump provide enough fuel, or will I have to switch to a 130gph pump and a regulator?

I know that I could use an electric helper pump back by the tank, but I don't feel like having gas pour in my face while I'm working upside down underneath the car

 

Well, it's a good question and something I'm trying to find out myself. I doubt there's a accurate way to determine if it's too much, not enough or whatever. I plan to run a 130 GPH mechanical on mine with a regulator (already bought it) - I'm just hoping I don't end up returning too much fuel and overwhelming the puny 5/16" stock return line. If I do, then I'll end up dropping the tank and sumping it - trying to avoid it if I can...

 

yah I'm trying to avoid the sumping situation too. I was planning on using a non-return style regulator, probably an Aeromotive. Hopefully Damon will step in here and help out

 

110gph is about 660lb/hr and as long as you're only asking 5-8psi of fuel pressure from this pump it can fuel 1100fwhp/880rwhp. Carb. only motors are easy to fuel since they only need single digit pressures, not like me trying to run 80psi.

 

Maybe you're thinking of electric fuel pumps? The 130 GPH rating on my mechanical pump is at 10 PSI....says it will support up to 800 HP. I believe the 110 GPH model is rated for 600 HP at 8 PSI....

phillip_helmet - Just for info purposes the instructions on my blower says the following: "The higher power output will require an aftermarket high-volume fuel pump such as Edelbrock #1711 (130 gal/hr), 1721 (110 gal/hr), 17000 (175 gal/hr), 1791 (120 gal/hr, electric), or 1792 (160 gal/hr, electric)".

- So I think your 110 GPH pump will feed your 305 just fine.

- Not trying to hijack your post (well not intentionally), I was mainly wondering if my 5/16" stock return line will handle the 130 GPH pump.