[eyehategod]

Hey all, I've never been able to find a really clear answer about this. Can our cars run the MHD E30 map without modifying the fueling system or anything else? I've got FMIC, Charge Pipe, Catless DP and I'm on MHD Stage 2+ but I'm interested in running E30 for the power gains, and also because during the 2 days I was on the E30 map previously, my car had never idled so smoothly and ran so nicely. It even solved timing correction issues I get when I do logs.

What's safe for E30? I've heard some people say with the map we can run E30 on stock parts, while my mechanic told me without upgrading my fueling system I'd just be on borrowed time. What about something higher, like E50? Fuel-it sells kits for Flex Fuel, Fuel Lines, Fuel Pumps and Fuel Injection, and I really don't understand which kit is necessary or any of them at all?

[biz77]

As long as your low pressure pump and high pressure pump are in good working order, early N55s have no issues running E30 on the stock turbo.

[weehe126]

I used to run E40-45 on the stock turbo and max it out. You will have no issues running E30 and you will not be on borrowed time for your fuel pumps. This assumes you have a 2011.

[eyehategod]

Originally Posted by weehe126

I used to run E40-45 on the stock turbo and max it out. You will have no issues running E30 and you will not be on borrowed time for your fuel pumps. This assumes you have a 2011.

You both mentioned early N55's, did the design of the pump change later on? Mine is a January 2012 build

[ap485]

Originally Posted by eyehategod

You both mentioned early N55's, did the design of the pump change later on? Mine is a January 2012 build

N54's and early 2011 N55's uses a rotary pump. Post 2012 N55's uses plunger pump.

[eyehategod]

Originally Posted by ap485

N54's and early 2011 N55's uses a rotary pump. Post 2012 N55's uses plunger pump.

So with an early 2012 build I shouldn't plan to run E30 without upgrading the pump? Just the LPFP?

[Kevin39]

It's not the LPFP that's the problem

[eyehategod]

Originally Posted by Kevin39

It's not the LPFP that's the problem

What is it then? Just trying to figure out exactly what's needed to safely and reliably run an E30 or higher blend.

[Turbod]

Originally Posted by eyehategod

What is it then? Just trying to figure out exactly what's needed to safely and reliably run an E30 or higher blend.

According to realoem.com they made the change in March of 2012 which would mean you have the older higher flowing HPFP. An easy way to tell is the DME. If you need a bench flash then you have the new HPFP. No changes would need to be made with either HPFP you have. I have not heard much from MHD in regards to the new DME/HPFP and their E30 map. Trying to create a tune that fits all or most applications means they wouldn't push boost to the limit. I would assume they would bump timing up quite a bit to make more power on lower boost.

[E90joee]

Isnt it suggested to upgrade fuel pump?

[Turbod]

Originally Posted by E90joee

Isnt it suggested to upgrade fuel pump?

No reason to unless you're needing more fuel than it can provide.

[E90joee]

Originally Posted by Turbod

No reason to unless you're needing more fuel than it can provide.

Hmm i guess ill try e85 tomorrow

[Turbod]

Originally Posted by E90joee

Hmm i guess ill try e85 tomorrow

E30 is really the sweet spot. If you're running the JB4 without a BEF that will be the limit with that tune. If you're running MHD only they have a E30 flash. There really isn't a need to go past E50 unless you're maxing out a larger turbo and have supplemental fueling.

[E90joee]

Originally Posted by Turbod

E30 is really the sweet spot. If you're running the JB4 without a BEF that will be the limit with that tune. If you're running MHD only they have a E30 flash. There really isn't a need to go past E50 unless you're maxing out a larger turbo and have supplemental fueling.

Oh didnt know, i am running MHD only but i dont know where they have E30 in NY E85 is more accessible

[Turbod]

Originally Posted by E90joee

Oh didnt know, i am running MHD only but i dont know where they have E30 in NY E85 is more accessible

E85 is 85% ethanol blended with pump gas. You would need to estimate how much pump gas to mix with ethanol to get to E30.

http://www.georgebelton.com/E85Calculator.php

[E90joee]

Originally Posted by Turbod

E85 is 85% ethanol blended with pump gas. You would need to estimate how much pump gas to mix with ethanol to get to E30.

http://www.georgebelton.com/E85Calculator.php

Thanks for that

[tyson413]

Originally Posted by E90joee

Oh didnt know, i am running MHD only but i dont know where they have E30 in NY E85 is more accessible

There is one gas station by JFK airport that has E85

[E92only]

Hey guys how do you like the MHD e30 OTS map? I'm getting some timing corrections that I'd like to fix. Plus I just recently installed a new HPFP on my 2010 build N55. How are the power gains compared to 91 ACN?

[Turbod]

Originally Posted by E92only

Hey guys how do you like the MHD e30 OTS map? I'm getting some timing corrections that I'd like to fix. Plus I just recently installed a new HPFP on my 2010 build N55. How are the power gains compared to 91 ACN?

E30 is a noticeable jump over 91 octane. I haven't ran any of the OTS maps so no feedback there. If you have some timing corrections then I would add just a little more E85. How are you verifying your mixture is E30?

[E92only]

Originally Posted by Turbod

E30 is a noticeable jump over 91 octane. I haven't ran any of the OTS maps so no feedback there. If you have some timing corrections then I would add just a little more E85. How are you verifying your mixture is E30?

I'm using an online fuel mix calculator. If I use 4 gallons of e85 and 12 gallons of 91 I come to a blend of e29. Do you recommend a better method for calculations?

[Turbod]

Originally Posted by E92only

I'm using an online fuel mix calculator. If I use 4 gallons of e85 and 12 gallons of 91 I come to a blend of e29. Do you recommend a better method for calculations?

If you're running into timing corrections then I would just mix a little more ethanol than you have been previously. Your fuel trims should be able to make up for the difference and the higher ethanol content should provide more knock suppression. I'd do your calculation based on E35 and see what that looks like.