Aux Fuel pump idea

[forcefed86]

So looking briefly at the specs of a walbro 255HP @60 psi. I see a .85 GPM rating.

Looking at a Shurflo (alky injection pump) I see a 1.8gpm rating at 60psi. @12v

So a $79 alky pump (that I happen to have already on my car) will flow roughly twice what a walbro 255 intank will.

So now I'm wondering if I can use a standard spin on type fuel filter with 2 inlets and one outlet. Then use the shurflow alky pump as a sort of 2nd walbro. Only without the hassle of running new lines. A simple -6 line out of the spin on filter to the rail will provide more than enough flow. The 100% methanol would also provide a nice octane boost without the hassles associated with 100% methanol fueled cars. Could even be taken a step farther and completely shut off your standard fuel pump and run totally on 100% meth at higher boost levels. IE run standard 87 octane in the cars tank. Have a separate 2-3 gallon 100% methanol tank. At 10psi have a solenoid shut off the standard fuel supply and pump, and open up the methanol side. You could have a seamless transfer of 100% methanol with a little work. And then cruise around on 87 octane back to the pits.

Problems:

1.) The small percentage of standard fuel in E85 will destroy the diaphragm in the alky pump. Need a way to prevent any e85 from back flowing into the alky pump. A boost activated solenoid should work. Would just have to ensure the alky pump kicked out more pressure than the 255.

2.) Running out of methanol would be bad... I have a low level light on my alky kit, don't see that being an issue.

3.) Any methanol that bypasses the injectors will end up in the fuel tank. May have to run 100% ethanol (e98) to avoid issues with this. Depending on how much fuel is bypassed you may end up with high percentages of ethanol in the cars fuel tank which may cause issues. I'm currently running e85 anyway and doubt it would be a problem.

255walbro 12v @ 60psi .85 gpm.

1.8GPM 12v @ 60psi shurflow pump.
Amazon.com: SHURflo On-Demand Diaphragm Pump - 1.8 GPM, 60 PSI, 12 Volt, Model# 8009-543-236: Patio, Lawn & Garden

 

[pneumo]

I hope I'm not splitting hairs, but I the way I read the specs of the Shurflow pump is 1.8GPM max flow. This site seems to say it reaches 1.8 GPM at zero psi.
Equipment & Supplies :: Shurflo 8009-543-236 12v pump only - Deck Stain | Wood Stain | Outdoor Wood & Fence Stain | Ready Seal

It's rated at a max pressure of 60psi, it doesn't say how much it flows at that pressure.

 

[forcefed86]

Good call. I had thought I had read at 60psi it flowed 1.8gpm. Probably a misprint on whatever site I had pulled up. (Or I had my head up my a**.) Although I think it will still flow more than enough to match very closely to a 255 walbro. There are several models.... this link shows flow rates at different pressures.

Looks like 294 LPH at 50psi for the 8000 series. These are commonly used in the alky inj kits. The high pressure cutoffs are easily bypassed. As long as your not running them continuously they hold up great at high pressures. I've had 3 kits now. Newest pump on the talon puts out 250psi! (devils own kit) The pump is much larger than the older 8000 series. Not sure which model it is.

SHURflo 12Volt 8000 60psi Electric Pressure Pump [H-PMP-8000] : Solar power : - Energy Matters Australia

This one flows a bit more....

SHURflo 12V 2088 Premium Continuous use DC Electric Pump [H-PMP-12PP] : Solar power : - Energy Matters Australia

I've heard you can get something locals are calling E100? It's the standard 98% ethanol and instead of fuel for the other 2% they use isopropyl alcohol. This would be compatible in the pump and for mixing in the fuel tank.