[GregDiNuzzo]

What's a safe mix of e85 that won't cause any harm to the engine or pump?

[fmonteiro444]

Need more information. Do you have the Walbro 400lph installed?

[GregDiNuzzo]

Originally Posted by fmonteiro444

Need more information. Do you have the Walbro 400lph installed?

No I havnt ordered yet. I know without the pump e30 is the safest you can go. Do you know what's the max ethanol mix with the pump? I will have jb4 stage 3, dci, dp, and intercooler too

[135Pats]

Originally Posted by GregDiNuzzo

No I havnt ordered yet. I know without the pump e30 is the safest you can go. Do you know what's the max ethanol mix with the pump? I will have jb4 stage 3, dci, dp, and intercooler too

All depends on the health of the stock low pressure side. Think you'll run into problems running more than E40, it certainly won't support that over the long term. @Jstang is running E40 on the stock system IIRC, think his pump is getting pretty tired. Mine was starting to call it a career at E30 so i replaced it and added the FFTEC pump.

[fmonteiro444]

Originally Posted by GregDiNuzzo

No I havnt ordered yet. I know without the pump e30 is the safest you can go. Do you know what's the max ethanol mix with the pump? I will have jb4 stage 3, dci, dp, and intercooler too

I can run up to E45 on my stock pump. Others can run up to E50. It's not recommended to go over 50% ethanol on the stock pump.

[JStang]

Originally Posted by 135Pats

All depends on the health of the stock low pressure side. Think you'll run into problems running more than E40, it certainly won't support that over the long term. @Jstang is running E40 on the stock system IIRC, think his pump is getting pretty tired. Mine was starting to call it a career at E30 so i replaced it and added the FFTEC pump.

You rang? I am running E45 and pressure is dropping into the 30's which is no bueno. Even on 93 octane it's getting down into the 50's. I am going to order a new LPFP and walbro in the VERY near future.

[GregDiNuzzo]

Originally Posted by 135Pats

All depends on the health of the stock low pressure side. Think you'll run into problems running more than E40, it certainly won't support that over the long term. @Jstang is running E40 on the stock system IIRC, think his pump is getting pretty tired. Mine was starting to call it a career at E30 so i replaced it and added the FFTEC pump.

Do even if I got the walbro pump I should go above e40?

[135Pats]

Originally Posted by GregDiNuzzo

Do even if I got the walbro pump I should go above e40?

Not quite understanding what you mean here.

On stock fueling-assuming a healthy pump- I wouldn't go much over E40.

With a healthy stock pump and an inline or in-tank upgrade, you can support full E85 though if doing that you should log diligently and make sure the high pressure side isn't tanking. Mixes like E50-E60 will be easily supported.

[GregDiNuzzo]

If I replace my hpfp with a walbro 400 hpfp I can run e50-60?

[135Pats]

Originally Posted by GregDiNuzzo

If I replace my hpfp with a walbro 400 hpfp I can run e50-60?

There is no upgrade on the high pressure side.

What we are talking about here is an inline booster pump on the low pressure side. If you add an inline or in-tank pump, yes E50-60 is not a problem in the least.

[GregDiNuzzo]

Originally Posted by 135Pats

There is no upgrade on the high pressure side.

What we are talking about here is an inline booster pump on the low pressure side. If you add an inline or in-tank pump, yes E50-60 is not a problem in the least.

Ok so I should run e30-40 if I get the walbro hpfp right?

[135Pats]

Originally Posted by GregDiNuzzo

Ok so I should run e30-40 if I get the walbro hpfp right?

We’re just talking past each other at this point.

There is no upgrade for the HPFP. No such thing exists.

A walbro LPFP upgrade will allow you to run high % concentrations of ethanol. So yes, E40 would be a walk in the park under those circumstances. You could get away with E40 on stock fueling assuming the stock pump is in good shape. But IMO you’d be pushing it, I would upgrade.

[GregDiNuzzo]

So the stock pump and hpfp are different correct?

[135Pats]

Originally Posted by GregDiNuzzo

So the stock pump and hpfp are different correct?

The N54 has two critical parts to the fueling system, the low pressure side, and the high pressure side. They are fundamentally distinct, and operate under vastly different pressures. What we are discussing here, and was has been worked on by the community, is a solution to assist the low pressure pump. So all this walbro inline talk is specific to the low pressure fuel pump (LPFP).

There is no solution to the high pressure side. Period.

[iturbo_bmw]

^LOL

hpfp = high pressure fuel pump
lpfp = low pressure fuel pump

your car has both
you can only upgrade the lpfp
no upgrade exist for hpfp

add an inline (second) lpfp to help the stock lpfp so you can run e50-e60 safely

[GregDiNuzzo]

Originally Posted by 135Pats

The N54 has two critical parts to the fueling system, the low pressure side, and the high pressure side. They are fundamentally distinct, and operate under vastly different pressures. What we are discussing here, and was has been worked on by the community, is a solution to assist the low pressure pump. So all this walbro inline talk is specific to the low pressure fuel pump (LPFP).

There is no solution to the high pressure side. Period.

Alright thanks

Peeps keep saying that there is no solution for upgrading HPFP, but what about the Vargas modified ones?
http://www.e90post.com/forums/showthread.php?t=828425

Are they no longer being sold? (Couldn't find anything on their website)

[GregDiNuzzo]

Originally Posted by iturbo_bmw

^LOL

hpfp = high pressure fuel pump
lpfp = low pressure fuel pump

your car has both
you can only upgrade the lpfp
no upgrade exist for hpfp

add an inline (second) lpfp to help the stock lpfp so you can run e50-e60 safely

Yes I'm new haha. Does every walbro 400 fit 335xi or is there a specific one for it? (Another noob question ik)

[Mit_Boost]

I have the Walrbo 450LPH in-bucket LPFP upgrade & run straight E85, no problems, fuel trims always sub-25%. If I had to do it over I would either:

• Do the Walbro Inline LPFP Upgrade
• Wait for CPE to release their N54 Billet Fuel Hat

This is their Coyote Mustang Billet Fuel Hat


Highlight Specs: Billet Aluminum Fuel Hat, Bracket Holds 3 Walrbo 400 or 255s, Integrated merge, -10 AN Fuel Line Feed, 30 AMP Relay

When this is released, if it allows you to run 2 LPFPs without shorting anything, I'll ditch my hacked-up OEM bucket and swap this in.

[GregDiNuzzo]

Originally Posted by Mit_Boost

I have the Walrbo 450LPH in-bucket LPFP upgrade & run straight E85, no problems, fuel trims always sub-25%. If I had to do it over I would either:

• Do the Walbro Inline LPFP Upgrade
• Wait for CPE to release their N54 Billet Fuel Hat

This is their Coyote Mustang Billet Fuel Hat


Highlight Specs: Billet Aluminum Fuel Hat, Bracket Holds 3 Walrbo 400 or 255s, Integrated merge, -10 AN Fuel Line Feed, 30 AMP Relay

When this is released, if it allows you to run 2 LPFPs without shorting anything, I'll ditch my hacked-up OEM bucket and swap this in.

Seems pricey. So you don't have any complaints with your walbro?

[135Pats]

Originally Posted by FCobra94

Peeps keep saying that there is no solution for upgrading HPFP, but what about the Vargas modified ones?
http://www.e90post.com/forums/showthread.php?t=828425

Are they no longer being sold? (Couldn't find anything on their website)

Tony is working on a real solution but keeping it under wraps, understandably so.

[Stucks]

I have the walboro in tank 400 or 450 lph pump or whatever it is...Been running e50-e60 for 25k miles. no issues. You will need to keep a close eye on monitoring parameters and after my recent battle with misfires, I'm pretty sure using e85 results in having to change your spark plugs more often lol.