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Fuel Pump Install (Walbro 255LPH)

Old 01-16-2009, 01:58 PM
  #21  
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good write up quag! lol
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Old 01-16-2009, 02:39 PM
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lol

and yeah this things loud so if your one who complaints about the EVAP noise ur gona hate the walbro, but my OEM fuel pump aws already messed up so by me putting this is it runs better prob less rich b/c i think my old one was stuck open........................still planning on getting it tuned
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Old 01-16-2009, 03:40 PM
  #23  
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Actually just finished drivig around, it really isn't loud at all
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Old 01-16-2009, 03:44 PM
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nice DIY!
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Old 01-17-2009, 01:23 AM
  #25  
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The fuel pump does pump out more volume too... fuel pumps are rated by volume and pressure. I have seen bad fuel pumps to where they could bump up pressure just fine but when the load/demand went up the car stumbled.

The volume on this one is 255 liters per hour, for those that didn't catch that
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Old 01-17-2009, 03:41 AM
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yes volume too.. though amount of volume is usually dictated by injector opening, the bigger injector you have the more fuel pressure you will need. And more pressure=faster spray speed=more fuel :D
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Old 01-23-2009, 04:25 PM
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Originally Posted by Ace83
yes volume too.. though amount of volume is usually dictated by injector opening, the bigger injector you have the more fuel pressure you will need. And more pressure=faster spray speed=more fuel :D
That statement is correct but missing some info... both injectors and pumps are rated in pressure and volume... If you bump up the voltage on the pump the pressure and volume will increase... With injectors they are rated at 380cc or whatever at whatever the stock fuel pressure is. If you increase pressure and volume to the same 380cc injector it will have a max flow of lets say a 410cc injector or maybe higher.

But too large an injector on a insufficient fuel delivery system and you will starve the rail and have unstable pressure in the rail so you end up with one cylinder running stoich or too rich and one cylinder running lean. Conversely if you have have too much fuel being delivered the car will be more difficult to tune and you will end up with with a crappy idle and horrible gas mileage but WOT should be perfect.
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Old 01-23-2009, 06:19 PM
  #28  
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Originally Posted by purevision01
With injectors they are rated at 380cc or whatever at whatever the stock fuel pressure is. If you increase pressure and volume to the same 380cc injector it will have a max flow of lets say a 410cc injector or maybe higher.

Yep! A 550cc injector rated at 3 BAR or pressure might flow 600ccs at 4 BAR or 5 BAR of fuel pressure. Plus if it's a really good injector design like an EV6 or EV9, the spray pattern gets SUPER DUPER sweet and it atomizes perfectly.
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Old 01-23-2009, 10:30 PM
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paul could you explain more on injector design (EV6,Ev9) id like to understand injectors a little better. btw iv got the dezod (deachwerks...however you spell it...lol) 550cc, i know they are pintle design but are ball type better, what about spray patern on the deachwerks...how would you rate them?

thanks in advance
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Old 02-27-2009, 02:18 AM
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So for 550cc's is a pump needed? I run 550's and have not noticed any lean spikes at WOT from starving.

Also for anyone considering buying,

http://siliconestop.com/index.php?ma...products_id=74

Same part number as dezod, comes with install kit, but about 25 bucks cheaper. (sorry dezod, gotta point out a good deal tho)
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Old 02-27-2009, 02:22 AM
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^^ depends on how much boost and power you're making with those 550s.. good find
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Old 02-27-2009, 02:51 AM
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I've seen tcs run 650 & 750ccs on a stock pump, just depends on how much power u wana make 320whp daily on ur stock pump won't hold long IMO
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Old 02-28-2009, 04:51 PM
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Originally Posted by rozz-tC
So for 550cc's is a pump needed? I run 550's and have not noticed any lean spikes at WOT from starving.

Also for anyone considering buying,

http://siliconestop.com/index.php?ma...products_id=74

Same part number as dezod, comes with install kit, but about 25 bucks cheaper. (sorry dezod, gotta point out a good deal tho)
That site is confusing because it shows two different pump part numbers. The Supra uses pump #GSS341 and The TC uses pump #GSS342 w/ the Supra install kit.

-Jeremy
sstracing.com
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Old 02-28-2009, 08:03 PM
  #34  
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the install kit is universal dude its not tC specific at all.
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Old 02-28-2009, 09:13 PM
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Originally Posted by Crayola_G
the install kit is universal dude its not tC specific at all.
I know the install kit is universal but most people use the Supra install kit because it has a part # and works on the TC.

-Jeremy
sstracing.com
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Old 03-01-2009, 12:13 AM
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what does it have that works better for the tC? im pretty sure they should be the same thing.
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Old 03-01-2009, 03:57 AM
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Originally Posted by Crayola_G
what does it have that works better for the tC? im pretty sure they should be the same thing.
Do you think every install kit is the same?

-Jeremy
sstracing.com
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Old 03-01-2009, 06:40 PM
  #38  
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in a way, the install kit comes w/ instructions to install the pump on many different fuel pump housing setups.
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Old 05-17-2009, 04:08 AM
  #39  
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first i would really wanna thank the person wo wrote this DIY it was really helpfull on my install. i am new to this forum and im just amazed by the lack of motivation on some people to do thigs themselfs. i have no idea how much a walbro fuel pump install would cost but im sure more than 100 easy. its cool to drive a fast car but its cooler to build it urself.

i also had a question too. i noticed that since i did the install it takes a while to start the car and sometimes i even have to pump the gas a few times, is this normal?
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Old 05-17-2009, 11:33 AM
  #40  
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DIY very helpful! thank you!
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