e85 setup

[Cranked]

Hey guys.

I am currently or somewhat slowly moving towards setting up for e85. I currently have as follows-

-Bosch Ev14 2000cc injectors
-255lph walbro lift Into 1.8litre surge tank with an 044
-Standard fuel rail with -6 fittings on fuel filter and rail
-Saard fpr.

I was going Rob's route of modifying the fuel cradle to accept-6 then run to surge tank and setup to utilize the factory lines. Which is looking to be reasonably expensive by the time u factor in hose and speedflow fittings. Then considered running a 1/2" feed to front of car and use the factory 3/8" line as the return, but seems it could be a little over kill atm.

So then I've had someone suggest that I just run the intank 400lph walbro and forget the surge tank, and just stick with the factory lines. Is surge tank not really a necessity? It's a street car that will eventually see the track and strip again on occasion.

What's peoples thoughts? Or alternative ideas/setups?

Or the other option is sell up what I've got and get the car running first as it has been 2 years since it was last in road.

Cheers.
Sean

 

[khubner1]

surge tank realy only needed on car that see the track with LOOONG sweeping fast turns these cause the fuel to run away from the pickup can be mildly addressed with an intank swirl pot.

the walbro 400l has the same ID outlet as the stock fuel system so tbh i don't really see any benefit in upgrading to larger lines.

tbh i'd first get the car running and enjoy some of you hard work. long projects tend to loose peoples interest if they don't get to drive them.

 

[DOUGMO]

If I recall correctly your making over 300kw now on pump?

If so one 044 will be boarder line if you really lean on it.

A big return is as important as a big feed when you have high volume pumps on a street car.
I run twin -6 feeds with a -8 return
I would run a surge if you can practically

 

[Cranked]

Yeah I was making 300kw before an injector died at WOT and boom! Half a block. So ripped the head, had it checked out, lucky it was ok as it has had an extensive upgrade treatment and have now put it onto a stock 6 bolt bottom end for now, as brisvr4 has inspired me to do so with his e85 performance. The plan is to put a ps1000 in it and run the eflex tune. Then consider my options as to build another bottom end again.

Alternatively just sell up the bits for e85, pump tune it, and see where we're at and go from there.

 

[brisvr4]

the walbro 400l has the same ID outlet as the stock fuel system so tbh i don't really see any benefit in upgrading to larger lines.

Really Kyle? If you don't know please don't comment.
You might want to ask Mick if he is running stock lines in the Evo lol
When running E85 you want as much fuel to the rail as you can. I use -8 with a combination of Walbro 400 and 044 in line.
I used stock lines with my smaller turbo but would not use them at all when trying to make any decent power.

 

[khubner1]

oh but i do know

and i quote mikey

Well... went to install the Walbro 416 E85 version today and am a bit surprised with how its been marketed as I suspect many people would have upgraded their fuel line diameter to 3/8" or 6AN to suit its barb size.
Fair enough it flows what it does which is the most important thing, but the actual 3/8" barb fitting on it is actually just the barb OD, not the ID of the fuel outlet.

walbro 255 compared to walbro 400
http://evocoupe.net/forum/download/file.php?id=985

 

[4piknup]

Be like trying to run a marathon but only breathing through a straw

 

[brisvr4]

^^ exactly. It doesn't matter that the outlet isn't huge. What matters is the flow capability of the pump.
Saying that someone should stay with stock lines on this pump would be a very foolish piece of advice.
And simply repeating something that you read on the internet doesn't mean that you "know" lol

That said, I realise that you are just trying to be helpful but as you can see the wrong advice could possibly cost someone an engine. Everyone should be sure that they have real world first hand experience with something before they post!

 

[EVOCPE]

I didnt quote that, thats what Rob wrote in his thread lol

 

[evo-gsr]

Lol...so well informed!!

 

[khubner1]

I'm forever getting mikey and rob mixed up.

The flow of the line should be enough all a larger line is going to do is introduce larger line volume and decrease flow velocity

To me getting the fuel to the rail quickly is just as important going to large with the line size could result in loss of rail pressure

Provided the line is not a restriction the flow will be the same but the velocity will change

 

[DOUGMO]

if your pressure drops at the rail due to a larger line you have a bigger issue.

more volume of fuel in the rail and lines at the same pressure is very beneficial

 

[caged]

Iv run stock lines on e85 to 400kws and logged fuel pressure and it was fine. Iv seen more than that on other non 4g platforms too. I would upgrade the return before I would touch the feed. I run a 450lph walbro now at around 350kws with no surge tank and the only huge drama was the oring/seal on the outlet split and bled off pressure.