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Old 05-28-2012, 08:30 AM   #1 (permalink)
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Default E-85 Conversion Input

I have been going back and forth between WMI and E-85. Here in IA E-85 is all over. I like the idea of having the octane "built in". I understand about 90% of what needs to be done; ~30% larger injectors, pump, more corrosion resistant hardware, etc...
Here are a few questions I hope to get input on:

1) Are the stock fuel rails ok in terms of the interior surface finish? Not 100%, but I don't think they're anodized (on the inside).

2) Are any size changed required to the fuel line sizes? In other words, would it make sense to up size those all ~ 30%? Any hard fast rules on sizing lines?

3) How does the stock ECU deal with this change in terms of calculating open/closed loop and trims? Assuming the stock NB's stay in as usual....

Thanks!
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Old 05-28-2012, 11:20 AM   #2 (permalink)
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Default Re: E-85 Conversion Input

I switched to e85 on my flashed ecu about 2 months ago and I'm loving it. Still stock turbos but even with a hack job tune it pulls a lot stronger. Anyway on to the important stuff....
My fuel system is; aeromotive 340lph pump>new 6-AN braided lines>fuel lab filter with stainless element>pampena rails with ohnoo stainless/anodized loop>fuel lab afpr>then finally back to my stock feed for the return.

As far as line sizes go, I prolly should have gone with -8 an lines since -6 is just a little bigger diameter than stock. I will just get 10 feet of -8 and then use my -6 for the return when I need to go past ~550awhp.

How will you be controlling fuel and timing? Piggy back? ECU wont have any problems with maintaining stoich and switching from open to closed loop. I'm also running a 3.5" gm maf in blow through, drivability is as good as stock maf using gas.
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Old 05-28-2012, 12:21 PM   #3 (permalink)
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What are your horsepower goals? That will determine if you need to upgrade lines or not. Most switch to stainless fuel filter element, but I've heard it is possible to use stock filters. Just change them OFTEN in the beginning.

A good fuel pump that will cover most horsepower needs is the new walbro 400. I have dual aero 340's because the one walbro was on the edge of my hp goals. I think the one 400 has already done 600+ on E85.
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Old 05-28-2012, 12:23 PM   #4 (permalink)
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Default Re: E-85 Conversion Input

Thanks
I have the MAFT Gen 2 in blow thru, with a S-ITC for timing...
I was thinking -8 as well, and 340 aeromotive as well...720cc PTEs.
I now have the AEM AFPR installed with Rob Beck adapter...shouldn't have any issues w/that correct?
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Old 05-28-2012, 12:24 PM   #5 (permalink)
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Default Re: E-85 Conversion Input

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Originally Posted by eengler2 View Post
What are your horsepower goals? That will determine if you need to upgrade lines or not. Most switch to stainless fuel filter element, but I've heard it is possible to use stock filters. Just change them OFTEN in the beginning.
I'd like to be in that 500-550 awhp range eventually.
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Old 05-28-2012, 12:25 PM   #6 (permalink)
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Default Re: E-85 Conversion Input

I would get the new walbro 400lph, although the aeromotive should be good for about 550awhp.

Edit: your list above will support 550awhp. looks good to me. it's not as intimidating as it seems.
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Old 05-28-2012, 12:28 PM   #7 (permalink)
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Default Re: E-85 Conversion Input

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I would get the new walbro 400lph, although the aeromotive should be good for about 550awhp.

Edit: your list above will support 550awhp. looks good to me. it's not as intimidating as it seems.
Should be good with the 340lph correct?
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Old 05-28-2012, 12:29 PM   #8 (permalink)
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Default Re: E-85 Conversion Input

Really dumb question -
At the pump, will the E85 nozzle fit?
I was there yesterday and the E85 looked bigger to me...
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Old 05-28-2012, 01:09 PM   #9 (permalink)
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Default Re: E-85 Conversion Input

E85 nozzle is the same as a no-lead nozzle at 13/16". Small diesel and conventional gas nozzle tips are 15/16".
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Old 05-28-2012, 01:20 PM   #10 (permalink)
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Default Re: E-85 Conversion Input

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Should be good with the 340lph correct?
Yes. I'm going to stick with my mine for some 15g action this summer untill I man up and get some dr1000's. I'll be holding my 15gs around the 500awhp mark.
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