Pump is on frame apx. even with bottom of tank.fuel gauge is connected inline right in front of pump.voltage is 14 or above and wiring is factory wire from donor vehicle Pump is for a ford big block and it starts dropping off around 3000rpm.
Pump is on frame apx. even with bottom of tank.fuel gauge is connected inline right in front of pump.voltage is 14 or above and wiring is factory wire from donor vehicle Pump is for a ford big block and it starts dropping off around 3000rpm.
If the wire is small gauge... it may not be able to keep up with voltage demands of pump under high load. Example there are Hot Wire kits for the LT1 vehicles with this issue.
But dropping to 5 PSI is pretty bad and probably more likely a combination of not enough wire gauge and pump just can't keep up.
You may also be experiencing the fuel line and/or filter between pump and tank collapsing? Or if plumbed to an old stock tank the inlet is usually 5/16 and the fuel pump feed requires a 3/8th line. I've gotten away with this if sock is removed from the tank in small low HP engines!
Your basing the pumps ability on the fact it's for a Ford V8 and BB too, but specs are Minimum Free Flow Rate (gph) 30 but that is at 70-95 PSI... and only 5/16th hose.
http://www.autozone.com/autozone/par...ntifier=386516
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
Looking into a in tank install for the fuel cell. Any suggestions on a good pump that is a reasonable price,Plan on fabricating some type of hanger in tank for pump.Apx, 400 horse in engine. Will be increasing pressure to about 18lb. when I get pump problems figured out.(81lb, injectors not 90 lb).this is in a crawler 5500rpm max
Carter p5000 is from TPI and handles all the TBI high pressure needs. But it does whine so lots of guys don't like it, should not be an issue on a crawler.
This is the best route:
http://www.gearhead-efi.com/gm-ecm-p...onversion.html
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
94 Blazer, Turbo'd 350 TBI - DD
1991 2500 Suburban Adventure truck - 4wd conversion, 4-link F/R, 582ci CNP Big Block with Terminator X EFI backed by a 6L90 and twin stick'd NP205 t-case
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1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
94 Blazer, Turbo'd 350 TBI - DD
1991 2500 Suburban Adventure truck - 4wd conversion, 4-link F/R, 582ci CNP Big Block with Terminator X EFI backed by a 6L90 and twin stick'd NP205 t-case
2012 Porsche Panamera Turbo - Date night car :)
1979 16' Action Marine/"Johnny Cash" Merc Bridgeport Champ Motor - Metalflake Maniac
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