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2G Out of fuel pump. Need suggestions

Posted by Jacolu3, Aug 26, 2018

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  1. Jacolu3

    Jacolu3 Proven Member

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    I waiting to find out myself. If I were to guess, some modifications would need to be done to fit.
     

    Drag Race Build 5K  25

    1997 Mitsubishi Eclipse GSX
    11.039 @ 132.35 · 2G DSM
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  2. Vegas smith

    Vegas smith Proven Member

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    Somebody on the s2000 forums said they are identical when holding them together.
     
    Last edited: Aug 30, 2018

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    1993 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  3. Jacolu3

    Jacolu3 Proven Member

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    That's good to know. That would be a quick temporary fix for me until I get a fuel cell
     

    Drag Race Build 5K  25

    1997 Mitsubishi Eclipse GSX
    11.039 @ 132.35 · 2G DSM
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  4. Jacolu3

    Jacolu3 Proven Member

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    Well I was wrong. I don't have the high pressure 450. Not sure how big a difference that makes but I'm sure it makes a difference.
    But my pump is definitely wired with 10 guage wire.
     

    Drag Race Build 5K  25

    1997 Mitsubishi Eclipse GSX
    11.039 @ 132.35 · 2G DSM
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  5. Vegas smith

    Vegas smith Proven Member

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    Don't quote me on this but I searched around for some comparisons and found it could be up to a 13% difference at your boost levels. I would check for yourself though as I searched around pretty quickly.
     

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    1993 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  6. donniekak

    donniekak DSM Wiseman

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    The high pressure version, or modded regular version has put numerous cars into the 700’s.
     

    Street Build 4K  0

    1991 Eagle Talon TSi AWD
    manual · 1G DSM
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  7. Jacolu3

    Jacolu3 Proven Member

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    Is that on E85?
     

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    1997 Mitsubishi Eclipse GSX
    11.039 @ 132.35 · 2G DSM
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  8. donniekak

    donniekak DSM Wiseman

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    manual · 1G DSM
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  9. Jacolu3

    Jacolu3 Proven Member

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    Drag Race Build 5K  25

    1997 Mitsubishi Eclipse GSX
    11.039 @ 132.35 · 2G DSM
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  10. Jacolu3

    Jacolu3 Proven Member

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    So I decided to order the new wally 525 to see how it does. Should probably be able to install it next weekend and test it out.
     

    Drag Race Build 5K  25

    1997 Mitsubishi Eclipse GSX
    11.039 @ 132.35 · 2G DSM
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  11. spyve4

    spyve4 Probationary Member

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    Good decision. Make sure to update the thread so we can all see how the install goes.
     

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  12. punk3rz

    punk3rz Proven Member

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    OP: Check out my thread on installing a 450.
    If you’re having a lean condition at WOT, it’s more than likely due to the seals not holding.
    The fix is putting a bulkhead fitting on the pump housing eliminating the issue.
    I would also recommend installing a fuel pressure sensor to verify your fuel pressure.
    Look over this thread if you have any questions:
    http://www.dsmtuners.com/threads/walbro-450-install-w-bulkhead-fitting.519232/
     

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    1998 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
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  13. Jacolu3

    Jacolu3 Proven Member

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    This is exactly what I'm planning on doing this weekend!!
    Great writeup!!
     

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    1997 Mitsubishi Eclipse GSX
    11.039 @ 132.35 · 2G DSM
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  14. Jacolu3

    Jacolu3 Proven Member

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    5BB4ABFC-8FBA-4875-BD32-59081E301A9F.jpeg 4909EB68-EB45-4230-94F3-43C5AFD05CDC.jpeg So I went ahead and put the new wally 525 in with a -6 bulkhead. Some people are telling me that I should go with a -8 line but I'm going to test it out with the -6 for now because I already had it installed.
    The 525 and the 450 seem to be identical or pretty close inside so the install is the same for a 450 or a 525. I just did one quick 2nd gear pull so I really don't know how much better it will perform. I plan on hitting the track next weekend for some testing so that's when I'll know for sure.
     

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    1997 Mitsubishi Eclipse GSX
    11.039 @ 132.35 · 2G DSM
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  15. Talon96fwd

    Talon96fwd Proven Member

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    6265CBA6-C053-434B-8730-EEEE823E84CF.jpeg That’s weird because I made 630hp to the wheels on a single walbro 450 and that was being conservative
     

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    1996 Eagle Talon TSi
    14.184 @ 104.365 · 2G DSM
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  16. Talon96fwd

    Talon96fwd Proven Member

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    This was on E85 and the newer version of the Walbro 450.
     

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    1996 Eagle Talon TSi
    14.184 @ 104.365 · 2G DSM
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  17. Jacolu3

    Jacolu3 Proven Member

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    What was your fuel line setup?
    Stock?
    -6?
    -8?
     

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    1997 Mitsubishi Eclipse GSX
    11.039 @ 132.35 · 2G DSM
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  18. Talon96fwd

    Talon96fwd Proven Member

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    6626281B-E917-44C2-8BCC-0D88A3BF47A2.jpeg So originally with the stock line I made 550hp. Then I upgraded the feed line to a 6an. But still on the stock return line.

    This Dyno graph is with the stock fuel feed line
     
    Last edited: Sep 8, 2018

    991  0

    1996 Eagle Talon TSi
    14.184 @ 104.365 · 2G DSM
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  19. Talon96fwd

    Talon96fwd Proven Member

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    F2A7843B-16E3-49CE-80CD-C1527D10F183.jpeg With the older model Walbro 450 I max that out at exactly 500hp. As you can tell I been threw some fuel pumps LOL.
     

    991  0

    1996 Eagle Talon TSi
    14.184 @ 104.365 · 2G DSM
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  20. Vegas smith

    Vegas smith Proven Member

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    Are you saying that the stock feed line limited you?
     

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    Talon96fwd likes this.
  21. OH91awd

    OH91awd Proven Member

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    6an should be good to around 6-750hp range. i only ran 8an on mine because we had a sale on the 8an e85 vibrant line at work.
     

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    10.89 @ 125.67 · 1G DSM
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  22. spyve4

    spyve4 Probationary Member

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    Are you over running the stock return with the 525?
     

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    06’BMW 325I
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  23. Talon96fwd

    Talon96fwd Proven Member

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    Correct i was stuck at 550hp but just a swap of the feed line made that that difference.
     

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    1996 Eagle Talon TSi
    14.184 @ 104.365 · 2G DSM
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  24. Jacolu3

    Jacolu3 Proven Member

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    I'm actually using the stock feed line as my return line because it's a little bigger
     

    Drag Race Build 5K  25

    1997 Mitsubishi Eclipse GSX
    11.039 @ 132.35 · 2G DSM
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  25. Strm Trpr

    Strm Trpr Proven Member

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    Any updates on your fuel system?
     

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    1997 Mitsubishi Eclipse GSX
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