With the need for 1000 cc/min injectors and a Walbro fuel pump, it seems that E85 requires very high fuel flow volume. Is there any need to upgrade to a larger volume fuel rail to deal with the pressure drop across the fuel rail when 1000 cc/min injectors are operating at 100% duty cycle?

 

I changed the fuel rail to reduce lean conditions cased by the small bore of the stock rail. Also the fuel pressure regulator so I have the proper pressure for my injectors because it's a math calculation on fuel pressure. I replaced the full fuel line to 3/8 methanol braided fuel line.

 

Did you replace both the high pressure and the return line? And for whichever/both, you replaced the entire line between the fuel rail and the gas tank?

 

All the lines.

 

I"m using the 100PSI fuel hose. I thing stock lines are 50PSI but I cant remember right now.

 

How much hassle was that? Where did you buy the lines?

 

You also need to bump up the fuel pressure about 10% for E85 due to the fuel density difference. I use 45PSI at the FPR at idle with a 1:1 rising rate on 93 and almost 50PSI with E85. 1000 cc injectors.

 

It's no hassle to me better safe than sorry. I purchased the lines from a Race shop near where I work. They are Aeroquip lines.

 

I don't think the Evo metal fuel line are nickle plated which means they will corrode over time. I open my tank up every year to check for corrosion.

 

all of that so far had been proven unnecessary.

 

The hole in stock fuel rail is not very large diameter. I'd be interested in seeing any documentation showing a minimal fuel pressure drop across the fuel rail at high IDCs with 1000 cc/min injectors.

 

Proven to you maybe but not me. I don't like to take chance especially when fuel component failure can result in fire.

 

stock rail bore is .192 and I have the Perrin .632

 

You make a good point. Better fuel flow= more consistent power, better spark, just to name a few.

While you are at it, upgrade to a 65mm tb.

 

it is not needed