What kind of pump(s) for higher hp setup? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

nomoremrriceguy · 11-01-2016, 07:09 PM

I'm looking to upgrade my fuel pump since I'll be upping the power in my car significantly pretty soon, as far as fuel pumps go is it better to run dual pumps eg: 2 walboro 255lph's or would it be better / easier to run one single pump such as a walboro 400?

KAT-PWR · 11-01-2016, 10:26 PM

That entirely depends on your fueling needs...
What type of fuel?
What fuel pressure?
What power goal?

nomoremrriceguy · 11-01-2016, 10:44 PM

Quote:

Originally Posted by KAT-PWR

That entirely depends on your fueling needs...
What type of fuel?
What fuel pressure?
What power goal?

I'm not sure about fuel pressure, but it would be on 91 oct, maybe meth down the road but just 91 for now and around 450-500whp

KAT-PWR · 11-01-2016, 11:02 PM

Walbro 255. You're not making enough power(or using ethanol) to warrant dual pumps or even a big boy pump really. You could get a 340 or 400 if you really wanted to.

nomoremrriceguy · 11-01-2016, 11:04 PM

Quote:

Originally Posted by KAT-PWR

Walbro 255. You're not making enough power(or using ethanol) to warrant dual pumps or even a big boy pump really. You could get a 340 or 400 if you really wanted to.

what power range would I want to step it up to one of those 2? Nearing 600?

KAT-PWR · 11-01-2016, 11:08 PM

Pulled from another thread, you can find al, this information by just searching.

"1000cc/ 95.58 lbs Injectors = 650HP
so 95.58 lbs/ 1.58 = 60 liters each (4) injector per hour
x 4 = 240 liters per hour

Walbro 255 flows these numbers at these fuel pressures

60 psi the pump flows 360 lb/hr
70 psi the pump flows 332 lb/hr
80 psi the pump flows 285 lb/hr
100 psi the pump flows 160 lb/hr"

Tyler_240 · 11-02-2016, 06:53 AM

FWIW...I'm running the $100.00 walbro 455lph...555cc injectors, stock fpr, and stock lines...fuel pressure is a non-issue for me...duty cycle at WOT is about 70% at 20psi and 11.8 AFRs

why did i go with the larger pump even though i'm at relatively low power (300ish)...I may decide to run E85 at some point, and that's going to require a lot more fuel

keep your future plans in mind...a 255lph would be fine

soundboy · 11-07-2016, 12:04 PM

Personally iv got good experience with the AEM 320LPH intank pumps. worked on a car that did 450HP with a set of ID1000cc on a rb25det with a gtx35. 97oct with meth

11-01-2016, 07:09 PM	#1
nomoremrriceguy Leaky Injector Join Date: Mar 2016 Location: bay area, ca Posts: 95 Trader Rating: (2) Feedback Score: 2 reviews	What kind of pump(s) for higher hp setup? I'm looking to upgrade my fuel pump since I'll be upping the power in my car significantly pretty soon, as far as fuel pumps go is it better to run dual pumps eg: 2 walboro 255lph's or would it be better / easier to run one single pump such as a walboro 400?

11-01-2016, 10:26 PM	#2
KAT-PWR Nissanaholic! Join Date: Dec 2011 Location: US Posts: 2,040 Trader Rating: (11) Rides Gallery: KAT-PWR Feedback Score: 11 reviews	That entirely depends on your fueling needs... What type of fuel? What fuel pressure? What power goal? __________________ MRP Manufacturing

11-01-2016, 11:02 PM	#4
KAT-PWR Nissanaholic! Join Date: Dec 2011 Location: US Posts: 2,040 Trader Rating: (11) Rides Gallery: KAT-PWR Feedback Score: 11 reviews	Walbro 255. You're not making enough power(or using ethanol) to warrant dual pumps or even a big boy pump really. You could get a 340 or 400 if you really wanted to. __________________ MRP Manufacturing

11-01-2016, 11:08 PM	#6
KAT-PWR Nissanaholic! Join Date: Dec 2011 Location: US Posts: 2,040 Trader Rating: (11) Rides Gallery: KAT-PWR Feedback Score: 11 reviews	Pulled from another thread, you can find al, this information by just searching. "1000cc/ 95.58 lbs Injectors = 650HP so 95.58 lbs/ 1.58 = 60 liters each (4) injector per hour x 4 = 240 liters per hour Walbro 255 flows these numbers at these fuel pressures 60 psi the pump flows 360 lb/hr 70 psi the pump flows 332 lb/hr 80 psi the pump flows 285 lb/hr 100 psi the pump flows 160 lb/hr" __________________ MRP Manufacturing

11-02-2016, 06:53 AM	#7
Tyler_240 Zilvia Member Join Date: Feb 2005 Location: Gainesville, FL Posts: 239 Trader Rating: (9) Feedback Score: 9 reviews	FWIW...I'm running the $100.00 walbro 455lph...555cc injectors, stock fpr, and stock lines...fuel pressure is a non-issue for me...duty cycle at WOT is about 70% at 20psi and 11.8 AFRs why did i go with the larger pump even though i'm at relatively low power (300ish)...I may decide to run E85 at some point, and that's going to require a lot more fuel keep your future plans in mind...a 255lph would be fine __________________ S13 SR20DET 12.9 ET @ 111 MPH

11-07-2016, 12:04 PM	#8
soundboy Zilvia Junkie Join Date: Aug 2013 Location: trinidad Age: 44 Posts: 320 Trader Rating: (0) Feedback Score: 0 reviews	Personally iv got good experience with the AEM 320LPH intank pumps. worked on a car that did 450HP with a set of ID1000cc on a rb25det with a gtx35. 97oct with meth