Re: 450 GPH mechanical fuel pump
[Re: Hemi_Joel]
#1418540
04/12/13 01:28 AM
04/12/13 01:28 AM
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Joined: Oct 2007
Posts: 4,209
New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,209
New York
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Read Vizard's remarks on calculating fuel pump capacity.
Boffin Emeritus
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Re: 450 GPH mechanical fuel pump
[Re: Hemi_Joel]
#1418542
04/12/13 10:08 AM
04/12/13 10:08 AM
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Joined: Jul 2005
Posts: 1,954
Blairsden, CA
Triggerfish
top fuel
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top fuel
Joined: Jul 2005
Posts: 1,954
Blairsden, CA
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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.
Last edited by Triggerfish; 04/12/13 10:10 AM.
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Re: 450 GPH mechanical fuel pump
[Re: Triggerfish]
#1418544
04/12/13 10:24 AM
04/12/13 10:24 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
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.
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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Re: 450 GPH mechanical fuel pump
[Re: Triggerfish]
#1418546
04/14/13 12:50 PM
04/14/13 12:50 PM
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Joined: Jan 2011
Posts: 4,785
Utah and Alaska
astjp2
master
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master
Joined: Jan 2011
Posts: 4,785
Utah and Alaska
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I put this pump on my 572 Hemi, there are lots of reports of the pump losing prime if the fuel system is not absolutely perfect and leak free. They produced a priming kit that runs an electric pump and has a check valve because it won't prime it self. I put a comp cams brass tiped pushrod in and it has a small tick. With the correct regulator, I think these are great. Tim
1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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Re: 450 GPH mechanical fuel pump
[Re: Darryls-Demon]
#1418548
04/15/13 01:28 AM
04/15/13 01:28 AM
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Joined: Jul 2005
Posts: 1,954
Blairsden, CA
Triggerfish
top fuel
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top fuel
Joined: Jul 2005
Posts: 1,954
Blairsden, CA
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Quote:
Everything I have read about the race pumps say that they will vapor lock unless you run a return line.
'
We have a 1/2" fuel line & a 1/4" return line & 2 Eddy 650's on the Hemi. The small 35 gph electric works great for priming when starting & puts out just enough pressure to prevent vapor lock on hot days, but I don't know if I'd trust it in heavy traffic on a 105 degree day.
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