How much naturally aspirated HP can it support at 6-8 PSI?
Thanks,
Craig

Wette Vette: I use to run those Mallory
but had many failures. Now run Weldon and NEVER have had any problems with them. The Mallory use to eat upthe burshes and just quit. No warning... Hope this helps you.

Mike Miller

The boat I just bought has two tanks and on each tank is a Mallory 140 fuel pump, and the installation is very nice. I really just don't know what kind of HP these can support. It had a blown 502 that had a 741 hydraulic roller, Brodix heads, and a 10-71 Littlefield and is estimated to be 800 HP. Only 1 pump runs at a time depending on which tank is selected, that is what pump is running.

I had one in my old boat with 575hp. I used it as a "helper" pump for my stock fuel pump. The stock pump would not keep a steady pressure at WOT, and would drop to 5 - 6 lbs. I added the holley and it kept a steady 7 - 8 lbs.

Maybe the guy used it as a helper like i did. ??

I pulled the blower motor and he definately was running the electric pump only. I was planning on possibly using a mechanical pump and then use the electric as you described as a helper pump. I still would really like to know how much HP people are running with the 140 stand alone.
Craig

600hp here on one pump and absolutly no pressure problems.

maybe i'm out of order here, but i've had nothing but problems with mallory products. want a kick ass fuel pump? aeromotive all the way.

If I were starting from ground zero I would likely buy the aeromotive, but since I already have the Mallory pumps I will give them a shot. I just don't know if I should try to run it as a stand alone or tee them together with a mechanical. The motor is a naturally aspirated 598 with Dart 355 CNC heads, 10:1 compression and a solid roller. It has a single 1400+ CFM Nickerson Dominator and CMI sweeper headers. I have been told the 140 by itself will feed this motor, and I have also been told the 140 will need help with this this of set up. Keep the opinions and experiences coming!!!
Thanks,
Craig

Call Dean and tell him you have one of his carbs and give him your setup. He will know the answer. If you don't feel like calling, shoot him an email....he usually checks them in the evening and will get back to you.

I have mine set up so they run one at a time. The pump flowes more than enough fuel and I don't like making two labor when the fuel is only being returned to the tank. It's also nice to have a redundant fuel pump. I lost a pump once in some rough water due to a bad connection. I wasn't off plane for more than a couple of seconds when I had the motor running on the spare pump. It's my opinion that a true return line is required to make these pumps live. The audible difference of the pump laboring dead head is eye opening.