Hey guys, i have searched all around and i have an idea but not completely sure. Im trying to find out how wide is the evo 8 feed and return hoses under the hood. Im trying to convert everything to black nylon braided hose with an fittings but first i need to know the sizes. My friend gave me a fuel lab fpr with a bunch of -6 fittings and new injectors for christmas. As far as i understand, the oem hoses going to the rail is -6 feed and -4 return. Maybe theyre both -4 but people upgrade feed to -6? Some clarity on this would be awesome.

Also, what black braided nylon hose would be e85 compatible? I looked up -6 an black nylon braided flex hose and this seems to be what map and stm uses on their kits?

 

stock piping is very small... i would think -4.. .but i dont know for sure

you have to buy AN hose that is made to take E85 and any alcohol fuel.

 

 

 

Most common is -6 feed and -4 return. You will need the adapter fitting to convert the stock feed hard line to AN. Most people go hardline - -6AN to fuel rail- -6 from fuel rail to AFPR and return with -4 from the regulator back to the stock return hardline. I wasn't able to use a AN adapter on the return line I ended up using a AN hose clamp.
Most AN line will be rated for E85/ alcohol. I have found summit brand AN line and fittings to be the cheapest. Although I did damage one summit -12 hose fitting trying to assemble a hose. Vibrant/ Fragola also makes good stuff but it does cost a bit more. STM uses Vibrant hose & fittings FYI.

 

 

Ya you could use the factory feed line to the rail - -6AN line from the rail to the FPR, and I bet you could also use the factory return line as well, like you mentioned.
** Your fuel lines should last a while but I would plan on upgrading them to something that is meant to handle E85 in the future. Especially the ones in the engine bay. Just my opinion though.

 

 

I am just trying to figure out what everyone does to connect the Feed line to the return barb on the pump housing. I wanted to do a quick disconnect to just a line and clamp on the housing but the line i got it way to big so now I'm trying to rethink all this.

 

Don't try to do that barb crap do yourself a favor and just run new braided lines to and from. We'll make your life so much easier. The stock lines are just shy of a -6 and as mentioned is good for around 6 to 700 wheel. If you're going to make new lines I would suggest going - 8 feed and dash -6 or keep a stock line as a return.

 

I will have a feed running -8 to the rail. I wanted to use the stock feed as the return line. I am just trying to figure out what to use from the quick connect under the car to the return barb on the hanger its self. What i was gonna use is to big. So didnt know what people have used. I know other people have done it.

 

i just ran a -8 return line to the tank and i think it goes to the top of my bulletproof racing sending unit. Makes it nice and simple

 

Yea, I have a stock hanger with two pumps. I got the 5/16 quick connect fitting from Radium to run from hard line up to the housing. But relished that is for there Hanger and the return on the stock is much smaller. So trying to figure out the best way to connect it before i just run the stock return.

I guess i could cut the of quick connect from the stock line and get new 1/4 line.

 

Ok here is what i would do. I know your going to say but its going to cost me money and yes your right it will but i would get rid of the stock hanger. Put in something that has all the fittings you need and just connect to them. Radium has a nice hanger and so does bullet proof racing. I will tell you this it made my life so much easier switching from the stock garbage to something that is way easier to work on. Fittings are already there and all you do is put fittings on which ever hose you wanna use and connect them and your done. Not going to pressure you into doing something you don't wanna do (pressure, pressure, pressure lol).

 

Thinking right now if something like this would work .