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Fuel pressure regulator plumbing : 850 Demon with a Carter mech. pump

Started by Kern Dog, March 31, 2014, 08:33:25 PM

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Kern Dog

March 31, 2014, 08:33:25 PM
Fuel pressure regulator plumbing : 850 Demon with a Carter mech. pump
I was having some fuel starvation issues so I pulled my Holley mechanical pump and installed a Carter. the Holley did deliver a steady 6-7 lbs of pressure. This Carter is between 10 and 11. The way I see it, I'd need to install a regulator to keep things kosher.
I'm thinking of installing this one:
http://www.summitracing.com/parts/aei-13201/overview/

It is listed as being a "Non return type" but I wonder if that is because it only has 2 ports. My proposed arrangement is to place the regulator behind the feed line to the secondaries. The "inlet" would be near the back of the engine and the "outlet" would be plumbed into the 1/4" vent line that is currently UNused and capped off.
I'm no expert on this stuff but it seems that if the unit is regulated to a number above what the pump is making, the excess pressure would flow out of the "outlet" port and back to the tank.
Let me know what you think.

cdr

#1
March 31, 2014, 09:24:30 PM
you need to use a return type regulator
LINK TO MY STORY http://www.onallcylinders.com/2015/11/16/ride-shares-charlie-keel-battles-cancer-ms-to-build-brilliant-1968-dodge-charger/  
                                                                                           
68 Charger 512 cid,9.7to1,Hilborn EFI,Home ported 440 source heads,small hyd roller cam,COLD A/C ,,a518 trans,Dana 60 ,4.10 gear,10.93 et,4100lbs on street tires full exhaust daily driver
Charger55 by Charlie Keel, on Flickr

cdr

#2
March 31, 2014, 09:30:08 PM
LINK TO MY STORY http://www.onallcylinders.com/2015/11/16/ride-shares-charlie-keel-battles-cancer-ms-to-build-brilliant-1968-dodge-charger/  
                                                                                           
68 Charger 512 cid,9.7to1,Hilborn EFI,Home ported 440 source heads,small hyd roller cam,COLD A/C ,,a518 trans,Dana 60 ,4.10 gear,10.93 et,4100lbs on street tires full exhaust daily driver
Charger55 by Charlie Keel, on Flickr

Windsor

#3
March 31, 2014, 09:34:26 PM
Get the return type if you wish to have a return line. The return type, if I remember right, has the return line BEFORE the outlet. That way any excess pressure gets sent back while still maintaining regulated pressure at the outlet. If you use an outlet as a return, you won't be able to get pressure/flow to the carb. My car doesn't have a return style system, so I use a quick fuel dual outlet non-return. http://m.summitracing.com/parts/qft-30-803/media
I am running a Mighty Demon 750. Don't knock it, traded 250 rounds of .40 for it during the "crisis", so I basically paid $90 for it.
Note: edited due to my inability to type, and my iPods autotype.

Kern Dog

#4
March 31, 2014, 11:03:03 PM
Quote from: cdr on March 31, 2014, 09:30:08 PM
http://www.summitracing.com/parts/maa-4309/overview/

http://www.summitracing.com/parts/hly-12-841/overview/

I looked on the Summit site and neither of these showed up. They have pages of $200 units and more expensive but screw that. I'm not racing this car.
These two are right up my alley. Thanks!
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