does anyone know what the stock FPDM outputs as far as amps? The final driver is a 5125FE MOSFET, but there is 0 information or a datasheet to be found on these chips, let alone new replacements available for purchase. it was apparently designed as a RF/VHF amplifier.
Indirectly someone mentioned, without any supporting evidence, that the stock FPDM maxes out around 18 amps.
I didn't research too hard on what the stock pumps draw - however, my Walbro F10000302 ('improved' GT supercar) pumps have a maximum draw of barely 15A per pump. Realistically will probably only draw about 10A at 100% duty at factory fuel pressures (PDF attached).
The common replacement MOSFET that is put in modified FPDMs has a 100A output on it. I can sorta understand this, but it's still over 300% more output current than a pair of pumps might draw.
I know a dual, unmodified/stock FPDM setup is fairly tried and true, but I really like to over engineer things
I'm thinking about upgrading the MOSFET of the FPDMs to allow for a little more headroom as far as amperage goes, depending on what the stock driver actually puts out. I plan on running a dual FPDM setup, one each controlling an individual pump. 100A per driver on the modified units sounds pretty overkill for a single 15A pump . . .
Considering it's going to be about $12 to modify/upgrade and a half hour of my labor, why not? There are several currently available and produced MOSFETS that have similar specifications, I just need to decide on an output current.
Indirectly someone mentioned, without any supporting evidence, that the stock FPDM maxes out around 18 amps.
I didn't research too hard on what the stock pumps draw - however, my Walbro F10000302 ('improved' GT supercar) pumps have a maximum draw of barely 15A per pump. Realistically will probably only draw about 10A at 100% duty at factory fuel pressures (PDF attached).
The common replacement MOSFET that is put in modified FPDMs has a 100A output on it. I can sorta understand this, but it's still over 300% more output current than a pair of pumps might draw.
I know a dual, unmodified/stock FPDM setup is fairly tried and true, but I really like to over engineer things
I'm thinking about upgrading the MOSFET of the FPDMs to allow for a little more headroom as far as amperage goes, depending on what the stock driver actually puts out. I plan on running a dual FPDM setup, one each controlling an individual pump. 100A per driver on the modified units sounds pretty overkill for a single 15A pump . . .
Considering it's going to be about $12 to modify/upgrade and a half hour of my labor, why not? There are several currently available and produced MOSFETS that have similar specifications, I just need to decide on an output current.
