I installed a Holley 12-801-1 on my 54 Nash Ambassador with a crate 350. After 2 years of dinking around with other cheap electrics. I got tired of pumps that lost their prime anytime when it ingested an air bubble. (like a sweeping turn with less than a quarter tank) With the Holley 12-801-1 I decided to test whether it's self-priming or not. Holley tech service didn't actually know this. (they could only quote their own website) I took the new pump and connected a fuel hose, shoved it down the filler tube, put power on the pump. Within one second it shot gas halfway across the driveway. So, YES, it's self-priming!
Okay folks. This is an old video. But anyone that comes to it and looks at comments....well here ya go. I bought one of these. Using it on an engine that was TBI to carb swapped. The same as this video mentions. Mine is a 87 305 (formerly TBI) now carbed engine. This pump apparently is factory set. I haven't seen any way to adjust it. I put a pressure gauge on it. BARELY 4 psi. I bought this along with a Holley intake because of the special bolt pattern on the TBI engines for the center bolts. I bought a Holley 600cfm Street Warrior Carb. All new from Summit. This pump once again is barely putting out 4 psi. Holley says that sweet spot for the carb is 6 psi. All new lines in the fuel system and new filters. It is only a few weeks old since the swap. I am having a vacuum issue between the holley carb and the holley intake. New everything so not sure why if the bolts are torqued correctly but it is.... I think I learned a lesson to ONLY BUY an adjustible pump. OH did I mention I intended on keeping my return lines but was sent the wrong regulator. I plugged one side of the out on it with a plug and used the other in and out ports. Again a holley regulator. LEAKS LIKE A levee in New orleans. Gas all over the engine bay. Now I just have fittings inline with the pressure gauge and the regulator came out. Still only barely 4 psi after the truck has run a few minutes. I have a stalling issue. Is it vacuum or is it also fuel pump not getting enough fuel. IT idles fine at first but the longer it runs the less it will idle and dies. You make the call. Will look for another and maybe not a Holley Product. I did that thing known as putting all ones eggs in one basket. Not Holley bashing as they are still in my state near Corvette factory. BUT a range is only good if it can be adjusted otherwise you are saying its a crap shoot. For the person below...I suppose you know already this can't be used for injection
I had the mighty mite my setup makes a little over 400hp it worked as long as we didn't spin the engine past 5k,ended up going to a blue pump,its loud but does the job...
I installed a Holley 12-801-1 on my 54 Nash Ambassador with a crate 350. After 2 years of dinking around with other cheap electrics. I got tired of pumps that lost their prime anytime when it ingested an air bubble. (like a sweeping turn with less than a quarter tank)
With the Holley 12-801-1 I decided to test whether it's self-priming or not. Holley tech service didn't actually know this. (they could only quote their own website)
I took the new pump and connected a fuel hose, shoved it down the filler tube, put power on the pump. Within one second it shot gas halfway across the driveway. So, YES, it's self-priming!
Okay folks. This is an old video. But anyone that comes to it and looks at comments....well here ya go. I bought one of these. Using it on an engine that was TBI to carb swapped. The same as this video mentions. Mine is a 87 305 (formerly TBI) now carbed engine. This pump apparently is factory set. I haven't seen any way to adjust it. I put a pressure gauge on it. BARELY 4 psi. I bought this along with a Holley intake because of the special bolt pattern on the TBI engines for the center bolts. I bought a Holley 600cfm Street Warrior Carb. All new from Summit. This pump once again is barely putting out 4 psi. Holley says that sweet spot for the carb is 6 psi. All new lines in the fuel system and new filters. It is only a few weeks old since the swap. I am having a vacuum issue between the holley carb and the holley intake. New everything so not sure why if the bolts are torqued correctly but it is....
I think I learned a lesson to ONLY BUY an adjustible pump. OH did I mention I intended on keeping my return lines but was sent the wrong regulator. I plugged one side of the out on it with a plug and used the other in and out ports. Again a holley regulator. LEAKS LIKE A levee in New orleans. Gas all over the engine bay. Now I just have fittings inline with the pressure gauge and the regulator came out. Still only barely 4 psi after the truck has run a few minutes. I have a stalling issue. Is it vacuum or is it also fuel pump not getting enough fuel. IT idles fine at first but the longer it runs the less it will idle and dies. You make the call.
Will look for another and maybe not a Holley Product. I did that thing known as putting all ones eggs in one basket. Not Holley bashing as they are still in my state near Corvette factory. BUT a range is only good if it can be adjusted otherwise you are saying its a crap shoot.
For the person below...I suppose you know already this can't be used for injection
I had the mighty mite my setup makes a little over 400hp it worked as long as we didn't spin the engine past 5k,ended up going to a blue pump,its loud but does the job...
So are they pumps any good? Looking at one for my stock 302w
Tbone Malone did the job!
Does the mighty pump work for turbo engines
depends on expected horsepower. this model is only for carb (non efi) engines