getting ready to run e85

[m3boost]

I have a ms3pro and ID1050x on their way.. My current setup is a built s52 87mm engine...11mm arp, o-ring block, cp pistons, arrow rods, p&p head , GT4094r TS. I'll be running the flex fuel setup for 91 octane and e85. What single fuel pump do I need for 700rwhp? or if I need two, I suppose I can run single one and at around 15psi have the other one turn on for the extra fuel needed for the higher boost.. But if I can get away with using just one, that would be my choice..

[someguy2800]

You’ll need two pumps unless you get a big magnafuel or fuel lab pump. Better off with something like two 340 lph in tank pumps. You’ll be close to out of injector too but it should make it.

[NOTORIOUS VR]

The new Walbro 520LPH pump might be able to squeeze out 700whp on E85 on a single pump. Depending on your fuel system build/pressure loss, etc.

22 psi on ethanol should easily net you 700whp on that setup... that will put you around 90% IDC at 0.82 lambda and 7500 RPM with a requirement of 348 L/H fuel flow.

So really, everything almost right to it's limit.

[someguy2800]

The new Walbro 520LPH pump might be able to squeeze out 700whp on E85 on a single pump. Depending on your fuel system build/pressure loss, etc.

22 psi on ethanol should easily net you 700whp on that setup... that will put you around 90% IDC at 0.82 lambda and 7500 RPM with a requirement of 348 L/H fuel flow.

So really, everything almost right to it's limit.

Thats the first I've heard of that pump. It should be pretty close. The lines and wiring would have to be perfect or it will drop pressure.

http://walbrofuelpumps.com/walbro-f9...ve-tcd470.html

Could also use a boost a pump with a walbro 450, but I guess I would just go two pumps if it were mine.

[Kingtal0n]

Some info from aeromotive that I thought was interesting about E85 apps

A crucial consideration regarding whether or not to run E85 is its tendency to rapidly and frequently contaminate and clog/block fuel filters, resulting in significant flow restrictions, which in turn may damage the engine and/or cause premature fuel pump failure. The reasons for filter contamination problems with E85 include:

• E85 is an alcohol based fuel, and alcohols are hygroscopic (attract and absorb water from the atmosphere), which can accumulate in and clog fine filter elements.
• E85 is an agriculturally produced fuel and, being a byproduct of plant material, there have been indications some of this “bio-mass” can accumulate in, and clog fuel filters.
• E85 has very strong solvent properties, like many alcohol based liquids, which will act to strip accumulated debris and residues from transport and storage containers, and the inside of fuel tanks and fuel lines, which in turn accumulate in, and clog fuel filters.

...

In testing, it was found a filter service interval that gave good fuel pump service life required a new, down-stream filter be installed every 10 run-hours. It is vital to understand that a blocked filter creates severe flow restriction of pump output, building excessively high operating pressure between the pump and the contaminated element. If the Stealth 340 is allowed to run in this environment, operating pressures between pump and filter can exceed 90 PSI, creating extreme current draw and reduced cooling flow, resulting in rapid failure of the fuel pump motor assembly. WARNING: If you plan to run E85 fuel you must be prepared to install proper filtration, and maintain it as frequently as every 10 run-hours. If not, Aeromotive does NOT recommend you the use of E85...

https://www.aeromotiveinc.com/tech-h...th-fuel-pumps/

[NOTORIOUS VR]

Could also use a boost a pump with a walbro 450, but I guess I would just go two pumps if it were mine.

I agree, since we all know how easy it is to say "let's turn it up a few more PSI" lol

More pump overhead is always a good idea. What's a bad idea is no safeguards with a twin pump setup IMO. Some sort of FP or Lambda fail safe should be used at all times.

[rajicase]

I trapped 137mph with a single 450 and 80lb injectors with a 280lb passenger. Don't know exactly how much HP, but should be close to 700.