Gents

I have a blank canvas 89 F150 rolling chassis and I am planning to run a 350-400hp engine with simplified setup with 1 rear tank and the in tank high pressure pump.

The issue I have is with regards to upgrading the stock pump. I have seen older posts on this forum and was just wondering if there were any updates to a workable solution to upgrading the stock in tank FDM for the 90-96 F150 to a higher flowing fuel pump?

From my research I think I have the following options (just curious if there is a better one as none of these are ideal):

1) 90-96 Quantum / Autobest brand higher flowing FDM - will fit straight in but not keen on going with a Chinese pump given the effort to swap a pump. TRE Performance I think do a pump that fits the OEM housing but once again reliability concerns.

2) Putting higher flowing pump in Stock 90-96 FDM - there seem to be two versions of the aftermarket FDM, OEM design with return line venturi which most pumps don't seem to fit and the Bosch 67003 made in Brazil design but once again most pump designs wont work with the venturi connection coming off the bottom of the fuel pump.

3) Using an 86-89 unit with no FDM - potential fuel starvation issues with no baffles in tank

4) Tanks inc baffled tank setup - pretty pricey with custom sending unit and fuel pump housing plus shipping cost to Australia for me.

5) Holley Hydramat with 86-89 setup with no FDM - expensive but might not be a bad solution.

6) Run dual pump setup like 86-89 with in line high pressure pump - noisy and not great for a simple streamlined setup.

7) Surge tank with built in submersed pump - bit of mucking around for a 400hp odd engine, probably overkill and still have some noise from external pump.

Appreciate any advice

Adam

 

Isn’t this what you already have? Are you looking to start from scratch with all brand new parts and build whatever system?

I don’t know what you mean by noisy. You can’t hear the pumps on my truck. If the pump is that loud it might be on the way out.

 

Yeah I am building all the systems on the truck from scratch. Going for a real clean simple look.

I really want just an in tank high pressure pump but I'm running into the before mentioned issue.

 

I've been skull sessioning this for a bit.

What's the fuel hanger opening in the pre-90 tank? Never had one in front of me.

The general shapes of the various year tanks are basiclly the same, right?

And the pumps go in their tanks in the same respective angles, right?

I've been thinking a baffle tacked in a tank, no module or hydramat.

 

I'm dealing with the Australian version which is slightly different in some respects but the 86 onward EFI motors had the larger 90mm opening. We didnt go to the plastic fuel tank, we have a 19 gallon rear steel tank.

The added issue in Australia is that our fuel senders stuck with the 86 ohms of 73-10 for the gauge through to 92 whereas your USA trucks changed in 89.

I have ordered the autobest 1075A rear tank higher performance FDM just to have a look inside, I ordered an 86 hanger assembly with the correct sending unit for me, I have the newer design FDM like in the Bosch 67003 made in Brazil, I have a denso 255lph pump and I'll probably end up getting a 87+ Mustang Walbro 155 or 190 pump....so I'm going to have a good crack at getting something to work and I'll take some photos of comparisons.

It's frustrating but this is the best way to learn

 

I'm guessing this would involve cutting up the tank?

 

No actually. Depending on ease of mig gun access, use a "coil" of perforated metal with locking tab.

Like a fence around where the sock lands.

I'll try & draw up an image.

My next JY trip is looking for a rear tank with minimum holes poked in it to experiment on.

Looking forward to pics

 

TI Automotive makes Walbro pumps. Find the part number on their site, buy at Jegs or Summit so source is known.

Lift pump like stock to a large inline would be easy and removing that tank switching valve.

 

Some thinking on my part here.
Look at the factory pumps and no baffles you will find a surge tank / filter assy. forward on the supply line.

The other thing to look at is the side of the supply line from pump to motor.
I dont know what side it is not but will it support 350 - 400 HP when needed?
I know just cruising the supply will most likely work but when all 400 horses are calling for fuel can the whole system keep up?

Me with no baffle in the tank I would run a mat even if I had a surge tank up the line as I would not want the pump to suck air ever!
Now after that who said you have to run a stock type pump? Just use the sender to work the gauge and run any after market pump bolted to the top of your tank where it is flat and not hit the sender arm.
Off the top of said pumps they have AN fittings for supply and return and run larger supply to the front.
You see this setup on TV and mags so why not for you?
Dave ----