450 GPH mechanical fuel pump

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Read Vizard's remarks on calculating fuel pump capacity.

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My bro has one on his 517 Hemi. Built for pump gas & with the
cr*p, ethanol laced gas around the Reno area, it still vapor locked
on its maiden voyage. Installed a small 35gph electric helper pump
& it cures vapor lock on hot days in Vegas. The Race pump is pretty
trick, lightweight & seems to put out enought to get the heavy Charger to 114 mph at MATS. I think its arm pressure on the cam is really low, something like 35lbs, vs the 100lbs + that the Carters or Eddy mechanical pumps require? He still intends to switch to a 150 gph
Holley gerator pump to prevent vapor lock issues. [/quo

Sounds like a nice ride. But I have always been told never put 2 pumps on one line. They acually work against each other.

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My bro has one on his 517 Hemi. Built for pump gas & with the
cr*p, ethanol laced gas around the Reno area, it still vapor locked
on its maiden voyage. Installed a small 35gph electric helper pump
& it cures vapor lock on hot days in Vegas. The Race pump is pretty
trick, lightweight & seems to put out enought to get the heavy Charger to 114 mph at MATS. I think its arm pressure on the cam is really low, something like 35lbs, vs the 100lbs + that the Carters or Eddy mechanical pumps require? He still intends to switch to a 150 gph
Holley gerator pump to prevent vapor lock issues.

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Any pump that has a suction side thats mounted up
on the engine(in the heated area) will/can vapor
lock... thats why a pump mounted at the rear and
pressurizes the fuel going to the front doesnt have
the vapor lock issue(higher the pressure the less
it has the chance to vapor lock)

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Everything I have read about the race pumps say that they will vapor lock unless you run a return line.

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