I am going to run one of the earls/jegs/edelbrock style inline fuel filters right off of the fuel rail with a 90 degree elbow. The only question is, -6an or -8an? This will be on a B18C1, with Benen fuel rail. I am going to have to buy a few fittings and line to match but want to do this right the first time, instead of buying something too small, or overkill. I also need the fitting which connects the stock hardline to an AN fitting to run the braided line too. I assume it flares on after you cut it, not sure what size I need on this either.
I did search, here and on HT with no good results. I rarely ask questions as for the most part I generally just know what to do but playing with the fuel line diameters I am curious about. (I could just be over analyzing as well but better be safe than sorry)

Also, I planned on buying the setup I need from either Jegs or Summit, but if you have any suggestions please post.

Thank you very much in advance for any help

 

6 AN hose will flow approx. 1100 lb/hr before it presents a significant restriction so unless you're delivering more than 1100 lb/hr, 6 AN is more than adequate.

Also, please do yourself a favor and buy a decent 10 micron filter. Buying a cheap Earls window-screen filter or anything larger than 20 micron = complete waste of money.
Why?
Your in-tank pump already has a 25 micron filter on the inlet. So if you ran nothing at all, your injectors would only pick up particles between 25 microns and 7-8 microns in size. OEM's (used to) install 10 micron filters before the rail so the injectors could only pick up particles between 7-8 micron and 10 microns in size (anything larger than 10 microns get trapped in the filter, anything smaller than 7 microns flow right through everything). Feel free to get in touch if you need help.

 

theres a thread by chase of chasebays floating around which show you how to do it. ive done it on two cars with swagelok fittings now with no issue.

i run -6 lines.

 

^^ can some one help me find the thread by chase on this. i am also trying to do the same thing but want to duble make sure of it. thanks.

 

I used a -6AN line and fittings but my filter is a -8AN. Rather than run the 90 degree bend off of the rail I would recomend mounting the filter on the firewall. I have the 90 degree then filter right now and I don't like the setup. It is very close between the throttle body and heater core lines where it is almost touching. I plan on re-doing the setup sometime this summer. Another thing, do they make a 10 micron filter for alcohol? I think most are like 100 micron...

 

https://honda-tech.com/forums/tech-misc-15/how-convert-oem-fuel-feed-hard-line-braided-flex-line-fittings-1452210/

I got my hardline compression to -6 fitting from fast-turbo.com.

 

what kind of fuel filer with 10 micron would you recommend. i have a walbro in tank fuel pump and i am going for around 450whp daily driven. thanks.

 

Fuelabs makes a -6 10 Micron filter. Every other on I have seen is -8 so you would need reducers. I had this same issue on whether to run a 10 or 40 Micron filter. Heard either would be fine but I wanted close to stock. I ordered the fuel tuck kit from downstarinc.com and it came with a 40 Micron that I switched out for a new oem filter and got the correct an fittings for and mounted lower down in the center of the firewall. Figure can't go wrong with a oem filter.