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Walbro 400LPH and E85

Discussion in 'Engine Building' started by Magana559, Jan 20, 2014.

  1. Magana559

    Magana559 The Warden

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    Tell me about them? Anybody have them installed? Maybe a better pump for the price?

    Im planning on making about 300whp to max of 350 with a high comp (13:1) with a 100 wet shot of nitrous. I had a 255 but it died while my car has been sitting for the last year and maybe down the line looking into a turbo setup.

    Let me know what you know! thanks in advance!
     
  2. Briansol

    Briansol Admins Admin VIP

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    255 hp supports into the 500+range. no need to go bigger
     
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  3. Matts96HB

    Matts96HB . Moderator VIP

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    What B said. My old car is well into the 400 range now and still running on the Walbro 255. Granted, you'll need volume of E85 to get there, but I can't imagine you'd run into any problems with the Walbro.
     
  4. Taco15

    Taco15 I wear stretchy pants VIP

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    if you've got to replace it then see how much the next step up would be. I'd be more worried about injector duty cycle than pump. I'm sure you've got that covered based on your build....I glanced at it. E85 that bishhh and let her ride!
     
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  5. Magana559

    Magana559 The Warden

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    I'm just worried the 255 wont push enough fuel once the nitrous comes on.
    I'm going to hit 100 shot and push 1000cc injectors.
    I need to replace the 255 anyway and they are only $40 more.....sounds like I already knew my answer anyway.
     
  6. Magana559

    Magana559 The Warden

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    Also my god pistons are expensive! I used to buy a set of arias for $400 to my door. Now I can't find my pistons less than $600.
    When did this happen?? :eek:
     
  7. Taco15

    Taco15 I wear stretchy pants VIP

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    yeah for 40 bucks you might as well do it. Also don't forget about fuel pressure regulator.
     
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  8. Magana559

    Magana559 The Warden

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    Yup, I'm looking for one as we speak. Can anybody recommend one?
     
  9. CAFROG

    CAFROG Honda Minion VIP

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    I have a K-Tuned FPR/Gauge. Works great.


    Hybrid Racing has a really cool/stealth looking FPR.

    But I would think JEGS or Summit would be cheaper.
     
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  10. newb

    newb phresh VIP

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    Its been said, but here are the numbers..

    If Im not mistaken it takes 20% more E85 to make the same power as gas. You want 300 wheel horse. Twenty percent would be another 60 horse. So that gives you room.

    It wont make a diff if your spraying or not. Fuel demands are the same for a given power level no matter how you get there.

    Doin the math, Id say your safe with a 255, up to 400 horse. Thatll put you at an equivelant of 480 on gas.
     
  11. Taco15

    Taco15 I wear stretchy pants VIP

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    sort of. from my understanding it burns 20-30% faster. not so much needed to make the actual power. seach around here for more info on E85 it's been covered many times. Also, you'll want to keep those rails and pressure pretty full of juice since that figure will come into play with fuel delivery. Either way, pump, regulator and rails. make sure those are stout and you should be fine.
     
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  12. newb

    newb phresh VIP

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    Doesnt it burn slower?
     
  13. Briansol

    Briansol Admins Admin VIP

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    I wonder if e85 is GMO or not :X
     
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  14. Magana559

    Magana559 The Warden

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    What I want is consistency. When the nitrous goes on fuel pressure drops because of the demand of the injectors/fuel solenoid.
    Plus it never hurts to have more room in case I go turbo.
     
  15. Taco15

    Taco15 I wear stretchy pants VIP

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    it burns faster. it's higher octane so the combustion is mo betta. On my Sti I've got 2200cc and actually need to 'prime' it before starting it. let the pumps fill the rails or else it stutters for a bit.
     
  16. Taco15

    Taco15 I wear stretchy pants VIP

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    with that pump you should have plenty of flow. I saw later you got the 1000cc so that's plenty big enough to keep you flowing. keep us posted!
     
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  17. newb

    newb phresh VIP

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    Nvm, just did some research lol.
     
    Last edited: Jan 28, 2014
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