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Discussion Starter #1
I have a summit 110gph electric fuel pump. It works great except it sounds like a vaccuum cleaner is in my trunk. I heard the Mallory gerator style pumps are much more quiet. Would a 70gph be enough fuel for a
350+hp 302? They have a 110gph pump but it's alot more money.

Regards,
BillGear

1966 Mustang Coupe, 302 custom roller cam, holley 650dp,http://www.289mustang.com
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If you're driving 60 mi/hr and getting 20 mpg then thats 3 gph (gallons per hour). So if your getting 5mpg (1/4th the above) then thats 4 times the rate or 12 gph.

I think this gives you some idea that if you driving at 60 mph and getting 1mpg then you need 60 gph.

What you need is fuel pressure! The ability to DELIVER the fuel at a rate greater than your maximum need. So if that cheaper pump can deliver maybe 60 gph at let's say 15 psi you're probably just fine.

(We need Camachinist here!,..maybe he'll show up...)

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I agree with roadracer. The more important number is the PSI. On most street driven cars, you need around 8psi ... for a really radical motor that will guzzle, you'll need something in the 12 psi area, but will require a regulator. If it makes you feel any better, my Holley pump is not exactly the quietest thing I've ever heard /forums/images/icons/cool.gif

BTW, 70gph is plenty ... figuring you have a 16-20 gallon tank (depending on year), it could empty your tank in less than 15 minutes if there was no restriction (like a float needle) at the other end. If you can use up 4 tanks in a hour, you'd better have a real nice paying job *LOL*.

If you always do what you've always done,
You'll always get what you've always got

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Discussion Starter #4
I found the 110gph pump a little cheaper, so I bought it. I already have a regulator so I can use the higher
pressure of the bigger pump. The car get about 8 miles per gallon, doesn't see the freeway much.

Regards,
BillGear

1966 Mustang Coupe, 302 custom roller cam, holley 650dp,http://www.289mustang.com
http://www.289mustang.com/images/vmfcar.jpg
 
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