ISx50 intank Fuel Pump - Upgrade Options
12-16-13, 10:27 AM
#1
ISx50 intank Fuel Pump - Upgrade Options
Lets discuss in case someone needs to upgrade soon. 
I removed my intank fuel unit from my IS350 and replaced it with the IS-F unit. I noted some highlevel differences in my "swap" thread. Figured I'd make a new thread to specifically present the information I have on the stock IS350 fuel pump since I removed it from my car. It would seem an aftermarket pump can be fitted to the stock housing with minimal effort...
IS350 oem intank fuel pump:
Unfortunately, there are NO markings on this pump to research the LPH or sizing...
Overall Length (tip to tip): 4.423"
Length of Pump Body Metal Case: 3"
Pump Body Diameter: 1 1/2"
*Note the tips on same side of the body*
Like this-
NOT like this-
If one were to consider replacing their FP the most common next step solution is a single Walbro 255 available in a variety of models.
Walbro 255
Model GSS342
Overall Length (tip to tip): 5"
Length of Pump Body Metal Case: 3 1/8"
Pump Body Diameter: 1 1/2"
Operating Pressure: 15-90 PSI - final fuel pressure set by regulator
Flow: 255-270 Liter Per Hour, at 3.0Bar/13.5V
Should support near 500whp
It appears the Walbro 255 will fit the stock IS350 housing with slight modification. You'll need a way to fasten the pump to the housing. If the wiring harness does not plug and play you'll need to join them (I've done this on several cars). The extra 1/2" length will need to be accounted for on the bottom of the housing; likely by removing the plastic that is beneath the pump filter-
More stock FP pics:
Hopefully this helps someone in the near future
I removed my intank fuel unit from my IS350 and replaced it with the IS-F unit. I noted some highlevel differences in my "swap" thread. Figured I'd make a new thread to specifically present the information I have on the stock IS350 fuel pump since I removed it from my car. It would seem an aftermarket pump can be fitted to the stock housing with minimal effort...
IS350 oem intank fuel pump:
Unfortunately, there are NO markings on this pump to research the LPH or sizing...
Overall Length (tip to tip): 4.423"
Length of Pump Body Metal Case: 3"
Pump Body Diameter: 1 1/2"
*Note the tips on same side of the body*
Like this-
NOT like this-
If one were to consider replacing their FP the most common next step solution is a single Walbro 255 available in a variety of models.
Walbro 255
Model GSS342
Overall Length (tip to tip): 5"
Length of Pump Body Metal Case: 3 1/8"
Pump Body Diameter: 1 1/2"
Operating Pressure: 15-90 PSI - final fuel pressure set by regulator
Flow: 255-270 Liter Per Hour, at 3.0Bar/13.5V
Should support near 500whp
It appears the Walbro 255 will fit the stock IS350 housing with slight modification. You'll need a way to fasten the pump to the housing. If the wiring harness does not plug and play you'll need to join them (I've done this on several cars). The extra 1/2" length will need to be accounted for on the bottom of the housing; likely by removing the plastic that is beneath the pump filter-
More stock FP pics:
Hopefully this helps someone in the near future
Last edited by mikellucci; 12-16-13 at 10:31 AM.
12-16-13, 04:52 PM
#6
They do nothing....Most of the F owners making real power are juiced so they wet shoot; fuel problems solved. lol
If I get extra time toward the end of my build I'll pull the ISF tank again and remove the FP....its huge compared to the ISx50; I'm really curious to know what it is now!
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