Does anyone have flow data for the stock TII fuel pump and/or a walbro? I'm trying to compare the flow rates at various pressures, but I could only find solid data on the FD pump and some aftermarket pumps the 3rd gen guys like to run. I know the walbros are 255lph, but what pressure/voltage is that valve given for? 43.5 psi/12V?

Here's what I have so far in case anyone's interested:

FD Pump @ 12V

PSI GPH LPH
40 52 197
45 50 188
50 47 178
55 45 171
60 43 161
65 40 151
70 35 132
75 30 115

 

FC fuel pump specs are listed in the FSM respectively.


-Ted

 

here is a cut and paste of figures i have gathered from around the place

- please note differences in total open flow and head pressure rated flow
and how different voltages affect the flow ratings
and also how some producers like to fudge for you the useless but better looking test !

60 GPH gallon per hour ( US gallons ) = 3.8 LPM litre per minute
= 227 LPH litre per hour

( roughly multiply GPH by 3.8 to achieve LPH )
-------------------

BOSCH
PN 10208
PN 10209
PN 10210
at 13.2v

Pressure PSI- GPH -Amps
0- 66 -5.5
20- 62 -6.9
50- 54 -8.7
70- 50 -10.0
100- 43 -11.7
120- 33 -13.0

WALBRO
PN GSS-341 ( and GSS-342 )
at 13.5v

Pressure PSI- GPH -Amps
0- 86 -5.0
20-79 -6.1
50- 65 -8.5
70- 57 -10.2
100- 34 -13.2
120- 12 -15.5

WALBRO
GSS-315 ( lower at pressure rated )
at 13.5 V
pressure PSI- GPH
0- 83
20- 77
50- 64
70- 48
100- 0
120- NA


OEM FD pump
pressure PSI- GPH
at 13.5 V
0- 72
20- 64
50- 48
70- 34
100- 0
120- NA

-----------------------

044 -- bosch




-------------

some more quoted numbers from unverified source
and must be considered rough guide only
and not as accurate as previous listings with current and pressure co- relation

note pressures at test rating are not consistent across all tests
volumes quoted at lower pressures than others must be taken in context

volume numbers with NO cross reference to output pressure or volts
must be regarded with extreme suspicion
- liberties are likely being taken to promote best figures that are not representative of running conditions

HP ratings are vague at best, with salt pinch

Holley In Tank Fuel Pump 190lph @12v -425hp
-225lph@ 14v -575hp

Walbro 255 213 lph(40psi) @ 12v
-255 lph(40psi) @ 14v

RRE DENSO Upgrade (eclipse) 150lph(43psi) @ 12v
-210lph(43psi) @ 14v

Supra Twin Turbo 260lph(43psi) @ 12v -650hp
-290lph(43psi) @ 14v -775 hp

3000gt VR4 / Celica Gt4 180lph(43psi) @ 12v
-225lph(43psi) @ 14v (estimated)

RX7 Twin Turbo 210lph(43psi) @ 12v
-260lph(43psi) @ 14v (estimated)

HKS ( Bosch 0 580 254 984 ) 250lph(43psi) @ 12v






PS

 

Bumpstart, thanks for all the data. That'll be very helpful.

Ted, the FSM does list some information about the stock FC fuel pumps in the technical data section, but it is very general:

NA pump

Output pressure: 64.0 - 85.3 PSI
Feeding capacity: at least 78 lph

TII pump

Output pressure: 71.1 - 92.4
Feeding capacity: 132 - 198 lph

 

i don't understand the difference of voltages though? i thought all cars ran 14volt and all semi's ran 24volt?

 

Good link for MANY fuel pumps.
http://www.stealth316.com/2-fuelpumpguide.htm#j5

 

Bumping my old thread, huh? I found the answer I was looking for this thread later on: https://www.rx7club.com/showthread.php?p=9154530.

Pump flow depends on voltage, which can be whatever the person testing wants it to be. 14V at the pump is ideal with perfect wiring, but many stock vehicles can barely maintain 12V.