What size Fuel Pump???

I am looking to build my fuel system and am not sure on the size of the fuel pump. Here is the background of the engine:
526CI BB , E85 fuel, say at least 12-1 CR, solid roller, indy alum heads (at least 700HP), FItech 1200HP power adder fuel injection system, fuel cell with in-tank pump (probably Holley 12-146).

I've sent a message to FITech to ask them but have not heard back so far. I was looking at the holley 12-146 setup that goes right into the fuel cell and has a 118 GPH @ 87 PSI. Seems like a lot of fuel? Is it too much? The smaller one is 67 GPH @ 80 PSI. I realize using E85 I need more fuel, but I don't want to overdo it (or underdo it either). I want to use the in cell pump setup, not an external pump.

1/2 pound of fuel for each HP FI is what I was told by holley

I think you would want at least the 450 pump, I wouldn't try anything smaller.

Might be close on E85 depending on how far over 700hp you end up making.

What fuel pressure does the Fitech run at? 43psi would get you more out of the pump than 58psi for example.

You should've been paying attention in math class back in high school!

BSFC for E85 is around 0.65 so that means you need 450 lbs/hour of fuel. E85 weighs 6.5 lbs per gallon so you'll need 70 gallons/hour at wide open throttle. 70 gallons/hour is roughly 270 liters per hour so the Holley pump should be fine. Double check with Holley that their pump is happy with E85. You'll need to verify that everything in your fuel system including the foam in the fuel cell is okay with E85. Otherwise you might be pumping goop into your engine.

BSFC of 0.50 is good for NA gas engines but E85 requires more fuel volume.

Is the FiTech compatible with E-85 ?
Not based on anything I have read to date.
FAST is the only one I am aware of that actually markets it's products as E-85 friendly.

FI Tech is compatible with E85, I asked them that prior to purchase. They said deduct 30% of the advertised HP level for that injection unit and that is the power it will run on E85. So that should put me at max 840 HP on the injection system.

Andy - thanks for the math! So the smaller pump should be fine as I believe the injection system doesn't need that high of a PSI. I will double check with everything will be OK with the E85. I did read that I will need to remove the foam from the cell as the E85 will eat it. I am not sure if they have compatible foam now or not.

**Just read that the big pump is compatible with E85, the small is not **

I remember the PSI requirement being around 51PSI, I am trying to find the number....

I'm running an externally mounted Fuelabs in-line pump fed through a pair of Holley Hydra Mats. It's a two speed pump with the higher speed being triggered via a micro switch on the throttle linkage that triggers when the outboard carbs are opened.

They have some really nice pumps and most have a two year warranty. Mine is super quiet on the low speed circuit, and fuel pressure remains constant at both low and high speed. I do run a return style system.

Worth a look if you are shopping for quality fuel pumps.

https://fuelab.com/

Also, these guys were very knowledgeable and helpful in getting my fuel system properly set-up and sorted out. They also have various sizes of fully submersible fuel line.

https://www.harmonracingcells.com/

I had to learn the hard way that it is usually cheaper to buy the better part built for future growth than it is to buy the same type part twice due to adding more HP later, IE fuel pumps, headers, ignitions and so on
Buy the biggest one now, not later
You know power is addicting and who knows if and when you will go to straight methanol and add a blower or turbo later

The smaller pump wouldn't have made it anyway.

Ratings are one thing but there are also system losses (lines/fittings/voltage level).

Having tuned cars on gasoline and e85 with both pumps (fuel injection) a 255lph pump keeps up to around 650 crank hp on gasoline. Would not even be close on E85.

Lol. That looks like the plumbing under my sink in my motorhome. I hope that isn’t your fuel system