TI Automotive 525lph install 11-14 silverado bucket
 

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factory 11-14 2500HD flex fuel bucket in which I plan on installing a walbro/ ti automotive 525 hellcat pump

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first unclip 4 of these from the outer bucket and it will release the factory pump and filter assembly

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And you will get this, larger metal canister is the fuel filter and the fuel pump sits inside, nothing holds it in there but the fuel hose on top, which has to be cut and removed. the white disc on the bottom is the venturi.
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the venturi sits on the left side of the fuel bucket and over these one way valves. As fuel is pumped some of the fuel is routed through this venturi which causes a vacuum and pulls fuel through these valves into the bucket, this prevents the fuel bucket from going dry
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fuel pump removed from inside of the filter

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the venturi, you can see the cone nozzle on right, as fuel is pumped into the bottom nipple it is forced through the nozzle creating a vacuum around the nozzle.

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this is where the new feed -8an fitting will be installed, the factory feed will become the return using PTFE line to route excess fuel back into the bucket

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top view of where new feed line will attach

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-8 an fitting installed, and picture of where I drilled holes through the hex nut in order to attach safety wire so they wont loosen (seen in pictures ahead)

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This is the bulkhead fitting I found from MONKEY FAB GARAGE, it holds to 10 GA wires and seals them nice and tight to prevent fuel leaking. This shows the best area to drill in the top hat of the pump. is drilled correctly you can uses the molded busses to prevent the nuts from backing off as well.

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Bottom view of the bulkhead fitting installed. on the left you can see the evap fitting, this has to be trimmed to allow the bulkhead fitting to fit flush on the hat.

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Here is what I mocked up to fit the new pump, the top disc will clip into the factory housing, and the bottom cylinder holds the fuel pump securely with holes drilled to allow fuel to flow in and around the pump keeping in cool. Made from stainless steel 16 GA

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view of how it uses the factory clips

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I took apart the walbro harness they supply you, I soldered new 10 GA PTFE wire. Those numbers are what I initially used to make the pump housing and retaining plate. The housing ended up being 70 MM tall and inner hole of the retaining plate 50 MM.

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Here is the PTFE hose and oetinker clamps uses to keep the hoses from coming apart. To the right of the tubing you can see the head of a bolt, this travels all the way down to the top of the venturi and holds it down. The factory pump has has the venturi installed directly to the pump housing and its weight/ fitment keep it in place. I ordered a SS T fitting 3/8x3/8x1/4 on ebay for 8$ that allows me to connect the stock corrugated hose to the fitting and other end to the nipple where the venturi attaches to factory pump. This fit perfectly and saves some money.
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the final install done. I recommend doing this when its summer or in a shop that is well heated. I had to warm the parts inside the house in order to get them to fit easier. Set up tested great, the venturi still filled the bucket and no leaks. Its not a direct drop in pump and as you can see I had to fabricate a housing to hold the fuel pump in order to maintain the use of the venturi. If you want other pics while i have this on the bench let me know.

awesome thread and thanks for the detailed write up.

how much are you charging to do this for our fellow PT.net members?

Would you have any interest in fitting one of these into a 2000 fuel bucket? I can pull the bucket assembly and send it your way if interested.

Have any pics of the bucket?

Unfortunately I don't, its still in use. There are a number of threads here with pictures, some in the gmt800 section.

It can be made to work, a different mounting plate for the pumps would have to be made to hold the pumps, maintain the Venturi, and support the top hat of the pump assembly. Plan on running e85?

I have an 07 NNbs 5.3 factory flex fuel setup, I am really interested in having you make one of these setups for me using the hellcat pump also.

I will suggest getting aftermarket fuel rails as well, it will allow for the regulator to be used after the rails eliminating a lean spot at WOT.

price?
 

Which fuel rails do you recommend? is there any modification needed?

Please let me know the cost of the pump installed hellcat pump or walbro 450 whichever is cheaper. Im pretty sure all i need is the 450.

Also. will i need to run new fuel lines or will the factory lines work?

Any -8an fuel rails will work really. Some people like the cheap ones as they get the job done. You will have to run all new lines to get that fuel to the rails though. I moved away from doing fuel bucket mods, for right now too many projects going on. I traded my 6.0 in for a diesel, so that’s getting most of my attention. What truck is the pump going in? You may be able to get away with but gutting the bucket and dropping the pump in with new lines.

Walbro install
 

I appreciate the info on the fuel rails.

I understand about being too busy.

congrats on the new truck!

Pump is going in my 2007.5 Silverado with 5.3
factiry flex fuel, but I won’t be running E85 it’s not an option near me.

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couple pics of the setup that was removed and plan to sell. People have asked questions so here you go.

Help please
 

Is this what I have to do to my 2018 Silverado or is it different

Yes you do

I like how you made the fuel pump holder housing and have it clipped into the factory plastic clips, I wish I would have seen this before I did mine and it would have given me better ideas. I have a 09+ L9H 6.2 flex fuel so the venturi setup is a lot different, and the filter housing is bigger and I couldn't see how you could fit duals in there. I have put a single 525 in mine, but I am paranoid the sharply bent corrugated hose I put in the factory plastic nipple (with no barb/ridge on it) with super glue holding it is going to find its way off eventually and leave me stranded somewhere, although it has lasted well over a year now. My issue now is the stock FPCM doesn't have enough power to push full duty cycle on the 525 and it drops pressure slightly. I really want to try to keep the factory PWM setup although I know the easy route would just be to convert to a mechanical regulator.

The super glue will degrade over time. the PWM will work up to a certain fuel pressure and then it won’t have enough current to make the pump flow sufficiently enough. I always recommend bypassing the PWM for a Manual 1:1 regulator. Yes, it does cost more, but it’s also less of a headache overall. The fuel system I built in this thread I sold to a member on here and he has been running it for years on his supercharged 6.0l with no issues. Except for blowing the trans.