Fuel pump options
04-03-2012, 02:10 AM
Post: #11
Fuel pump options
When I was working selling Walbro fuel pumps and someone asked how to size a fuel pump, the Walbro engineers approved the following....

things you need to know....
peak volume of injectors
peak effective duty cycle of injectors
# of injectors




Count all the injectors and the volumes of each. Add up the total CCs of all injectors, then multiply that by whatever your maximum duty cycle is(usually 80%). Ok, now multiply that number you have by .015873, that will give you what your gph for all your fueling sources use(maximum fuel use at WOT). Now, since fuel running through a fuel system can get heated, add 20% to the total number you have. That is the maximum amount of fuel your vehicle will need(with those injectors at that pressure and at the duty cycle and with enough margin for error[or heating]) Any more can add heating to the fuel, or in worst case scenario, can "push" excess fuel past the injectors cause a low rpm rich condition.

Dan -

You can |Sad .... OR you can ask for help!!!

OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991
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04-03-2012, 07:57 PM
Post: #12
Fuel pump options
a bosch 040 fuel pump 180euros...... Huh
a walbro fuel pump 75 euros..... :wink:

daily driver avensis 2.0 d4d and Yaris 1.0
weekend driver 1985 AE86
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04-09-2012, 06:02 PM
Post: #13
Fuel pump options
But the BIG qustion, where can I buy such a small pump? All the external pumps I can find, are upgrade pumps for turbo engines and those are too big.

Project AE86 now begun.

Cars I have owned:
Toyota Starlet EP91 1,3 16v Turbo, 200hp
Toyota Starlet EP71 1,3 12v Sport
Mercedes 207D camper, 1977.
Toyota Starlet EP70 with a 174hp Silvertop 20v See video here:
http://videos.streetfire.net/search/Star...079edc.htm
Toyota Corolla AE101 with a 164hp Silvertop 20v. (Evolution bodykit and candycolor paint).
Volvo 240 2,1 (The only car I have maked money on).
Toyota Corolla EE90 (my first car)
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04-09-2012, 06:31 PM
Post: #14
Fuel pump options
Just an example:
http://www.rhdjapan.com/sard-130l-h-high...pump-11769
130L/H is more than you will ever need.
I already hear guys like Roger say "too expensive" but hey that the price for the quality and the serenity for 15/20 year, so...
(Walbro = XX€ every 2 years or so, doesn't sound a great deal to me...)

You can also go to Toyota and buy an OEM pump or to the junkyard and try to find a small japanese car and rip out the pump. (most of them have denso fuel pump so they are nearly the same size)
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04-09-2012, 07:29 PM
Post: #15
Fuel pump options
Yes, but they are all internal pumps. I can't use it for my fuel cell.

Its true, you can't get a better pump than a original Toyota, but a walbro cost 1/3 of a price.

Project AE86 now begun.

Cars I have owned:
Toyota Starlet EP91 1,3 16v Turbo, 200hp
Toyota Starlet EP71 1,3 12v Sport
Mercedes 207D camper, 1977.
Toyota Starlet EP70 with a 174hp Silvertop 20v See video here:
http://videos.streetfire.net/search/Star...079edc.htm
Toyota Corolla AE101 with a 164hp Silvertop 20v. (Evolution bodykit and candycolor paint).
Volvo 240 2,1 (The only car I have maked money on).
Toyota Corolla EE90 (my first car)
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04-09-2012, 08:02 PM
Post: #16
Fuel pump options
For a fuel cell ? I didn't see you where looking for an external pump !
(You should have mentioned that on your first post ^^)

You can buy one brand new from many cars actually Smile
example:
Bosch 0 580 464 070
130l/h @ 3 Bar, (available on Alpha Romeo, BMW, Citroen, Renault, Peugeot, Opel, VW, ...)
Around 110€...

Bosch 0 580 254 911 (also know as bosch 911)
95l/h @ 4bar
Around 130€...

you can find more references here:
http://www.bosch.co.nz/content/language1...mp_WEB.pdf

Hurray!
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04-10-2012, 07:00 PM
Post: #17
Fuel pump options
Project D Wrote:For a fuel cell ? I didn't see you where looking for an external pump !
(You should have mentioned that on your first post ^^)
:

A propper AE86 should allways run with fuel cell :wink:

But thanks

Project AE86 now begun.

Cars I have owned:
Toyota Starlet EP91 1,3 16v Turbo, 200hp
Toyota Starlet EP71 1,3 12v Sport
Mercedes 207D camper, 1977.
Toyota Starlet EP70 with a 174hp Silvertop 20v See video here:
http://videos.streetfire.net/search/Star...079edc.htm
Toyota Corolla AE101 with a 164hp Silvertop 20v. (Evolution bodykit and candycolor paint).
Volvo 240 2,1 (The only car I have maked money on).
Toyota Corolla EE90 (my first car)
Find all posts by this user


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