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Modyfying a Walbro.....

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Old Sep 25, 2011, 10:51 PM
  #16  
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Good info
Old Apr 12, 2012, 05:58 AM
  #17  
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Good info indeed. What does the pressure go to with this bypass modification?
Old Apr 15, 2012, 05:17 PM
  #18  
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you can hold over 75psi

base pressure is 43ish psi and i ran 33psi on it so 76psi total
Old Apr 15, 2012, 06:46 PM
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Nice, I think I have a faulty one that open at 20psi.
Old Oct 11, 2012, 05:04 PM
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the mods 100% safe to do when you do it correctly.. the idea is to make the spring tension tighter on the ball so it still is able to lift, just not at the same psi anymore.

if you punch the cap in to far you will fully disable the safety valve which is not what you want to do.

the way to tell if you got it right is sit up and use a punch and hammer and tap it but feel the cap go down.. once it goes down some then check how far it went down.. you'll see where it was originally seated by walbro.. you wanna go down about the thickness of a penny.

this mod is far from dangerous when done right.. the valve still operates if you somehow manage to clog your fuel lines when the mods done right.

just thought id try to supply more info.

most people wont need past 100psi of fuel pressure anyways.. our base is what 43? so lets say you wanna run 50psi.. thats still only 93psi. 99% of community will never run 50psi.. even this day and age.

the same way i described is the same way Buschur does it.. its 100% safe & has absolutely no way of hurting the fuel pump under normal operation.

below pic is with the cap pushed in to far, but illustrates how the mechanism works. the original post shows this also, but these pics are more clear of the actual part:


Last edited by tscompusa; Oct 11, 2012 at 05:14 PM.
Old Dec 27, 2012, 01:56 PM
  #21  
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Ok so i know this thread is old but im missing something. From the top view the cap u push down of the three is the top one correct? I havent seen my wally since i put it in so idk. Im geusing its the one in the pic above with the yellowish tape over it correct? I mite be way off here and thats why im asking.
Old Dec 28, 2012, 09:49 AM
  #22  
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Bump^^^
Old Dec 28, 2012, 01:19 PM
  #23  
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Originally Posted by zenoise
Ok so i know this thread is old but im missing something. From the top view the cap u push down of the three is the top one correct? I havent seen my wally since i put it in so idk. Im geusing its the one in the pic above with the yellowish tape over it correct? I mite be way off here and thats why im asking.
these pictures don't get much clearer, its the top plug farthest from the harness.

and that's not yellow tape, the image is highlighted

Last edited by jvlazzar; Dec 28, 2012 at 01:22 PM.
Old Dec 28, 2012, 06:49 PM
  #24  
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yes zenoise, what jvlazzar said. that's just a photoshop box over the relief valve cap that you want to push in to stop it from relieving pressure. don't hammer on it, just lightly tap it in with a punch or a small drill bit.
Old Dec 30, 2012, 10:00 AM
  #25  
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Originally Posted by jvlazzar
these pictures don't get much clearer, its the top plug farthest from the harness.

and that's not yellow tape, the image is highlighted
Just double checkin. It looked like tape to me. I dont care about how clear it was to u. I just wanted some clarification. Of course though to get that you have to get this.
Here come the critics and wise guys. Lol.
Old Oct 20, 2017, 09:22 PM
  #26  
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Meh, looks like the pictures in this thread need to either be reposted or updated
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