Fuel pump for stage 2?
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This is a discussion on Fuel pump for stage 2? within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; Looking to get a protune for my wrx now that I've got stage 2 done. Called a shop that a ...

  1. #1
    Registered User azsun's Avatar
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    Fuel pump for stage 2?

    Looking to get a protune for my wrx now that I've got stage 2 done. Called a shop that a few wrx/sti owners at my work have gone to and really had a good experience at (Goodspeed Performance in Scottsdale, AZ). The tuner I talked to said they won't tune stage 2's w/o an upgraded fuel pump as the duty cycles get too harsh on the OEM at higher RPMs.

    Hadn't even considered this upgrade... thoughts? Anyone with Goodspeed protune experience?
    -Corey

    2011 WRB WRX - Stage 2+
    Invidia TBE, AEM CAI, PW TMIC
    295whp/305w torque

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  3. #2
    Registered User Ruh Roh's Avatar
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    Godspeed is a brand many stay away from here. Many members as well as I run a stage 2 setp on stock fuel pump with no problems.
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    Sammich Makin' Pwincess wrxtreme06's Avatar
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    Quote Originally Posted by Ruh Roh View Post
    Godspeed is a brand many stay away from here. Many members as well as I run a stage 2 setp on stock fuel pump with no problems.
    he said GOODspeed, not GODspeed. lol

    i've never heard of anyone requiring an aftermarket fuel pump for stage II. my tuner protuned mine on the OEM one.

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    Registered User azsun's Avatar
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    Quote Originally Posted by wrxtreme06 View Post
    he said GOODspeed, not GODspeed. lol

    i've never heard of anyone requiring an aftermarket fuel pump for stage II. my tuner protuned mine on the OEM one.
    Yeah he said they're the only shop around here that requires it for them to do the tune so I was curious. Had talked with Forced Air Technologies and Dyno-Comp who are also pretty well reviewed from everything I've seen on google reviews and NASIOC and they both don't ask about the pump so bit skeptical. Plus they're looking for $375/hr for a tune and the others are ~$100 less...
    -Corey

    2011 WRB WRX - Stage 2+
    Invidia TBE, AEM CAI, PW TMIC
    295whp/305w torque

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    \_(ツ)_/ Rambo's Avatar
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    Quote Originally Posted by wrxtreme06 View Post
    he said GOODspeed, not GODspeed. lol

    i've never heard of anyone requiring an aftermarket fuel pump for stage II. my tuner protuned mine on the OEM one.
    It's actually quite common. In 3rd gear at WOT, my IDC is 96%. I could certainly benefit from a larger fuel pump, although I could probably get by without it.
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    Registered User Ruh Roh's Avatar
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    Quote Originally Posted by wrxtreme06 View Post
    he said GOODspeed, not GODspeed. lol.
    woops cant read
    Marky Mark
    2002 Stage 2.3 PSM Bugeye tuned by Matty at WTFtuning
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    I would think with an upgraded pump you could squeeze out a little more power/run a little more boost..but I don't see why it would be mandatory..

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    Registered User efmd3's Avatar
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    Go to a different shop, you really don't need a different pump at stage 2. If you must, why not Walbro?

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    OMG WTF MainFrame's Avatar
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    Replacing the pump isn't a bad idea, most can get away without it, but it will give you more overhead in case something goes wrong (you always want to make sure you have plenty of fuel). The Walbro 255lph is cheap enough I don't see any reason not to.

  11. #10
    Registered User Impreza2.0's Avatar
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    I have a modification path you don't want to follow, but I found out the hard way in a sad attempt at a stage 2 tune, and WOT in 3rd at 6500rpms on the stock gear ratio is enough to make the ECU freak out. I assume that is what happened, there was a severe fuel cut and the car stuttered, stalled, restarted due to already-present fuel, and was OK again. Upon asking my mechanic what that was being caused by, he reminded me about our previous conversations about injectors/pump/tune and that all 3 should be done at once, that 550cc injectors are just over the ability of the stock pump once an tuning is up for the doing. You CAN do it, but for headroom as stated, and safety as stated, basically the same thing stated two different ways, it isn't a foolish 45 minutes and under $200 investment in the durability of the fueling system. This is one of those "don't cheap out" things, since it isn't something you can just whip back together on the side of the road without tools. My opinion, your car. Anything that breathes better is going to need to drink more. Especially if you put more fire under it's butt.

  12. #11
    Registered User 11blackwrx's Avatar
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    i never needed one for my stage 2
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    Master Baiter EJ257's Avatar
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    Quote Originally Posted by 116Fanatic
    I would think with an upgraded pump you could squeeze out a little more power/run a little more boost..but I don't see why it would be mandatory..
    Clark has expressed his issues with fuel pumps before, where they start not to provide adequate flow. It's something he wants on the car for your/his safety. If he's going to be tuning the car, listen to his advice.

    I installed a Walbro when I went S2
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  14. #13
    Registered User starkall's Avatar
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    Get the DW 65c pump. It's $150 and take an hour to install at most.

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    OMG WTF MainFrame's Avatar
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    Quote Originally Posted by Impreza2.0 View Post
    I have a modification path you don't want to follow, but I found out the hard way in a sad attempt at a stage 2 tune, and WOT in 3rd at 6500rpms on the stock gear ratio is enough to make the ECU freak out.

    No, the stock ECU is more than capable of handling far beyond simple stage two modifications..



    Quote Originally Posted by starkall View Post
    Get the DW 65c pump. It's $150 and take an hour to install at most.

    I'm not sure of the logic behind this, considering the Walbro 255lph pump is more than adequate for half the price.

  16. #15
    Cheeky Bastage! spirited09wrx's Avatar
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    not exactly a thread jack since it affects the OP...

    I was looking online at the walbro and it said 02-07 and 08+ with modifications...what are those modifications or is the site I was looking at have wrong info?
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