JN111112

Hey guys,

I do follow a few build threads on facebook's s2k dedicated pages, and I came across someone who recommended someone going e85 with a k-pro installed, if they have a walbro 255 fuel pump.

Now although I'm rather new, doing some searches I've noticed that most s2k owners here only go e85 w/ fuel pump on a supercharged set up- is it possible to do it on a NA build? and if anyone does have this exact set up, what gains am i expecting?

I honestly wouldn't mind implementing that setup as it gives me more of a variety to touch up on mods in terms of a NA build.

Any advise would be great! thanks!

MB

I've gone back to OEM fuel pump for now,as I found fuel surge worse with the 255. It will have a higher flow demand than the OEM one.

I'm 210 whp (or about 300 on a US dyno )

Greenlight

I have the Bosch 044 inline pump on my car (NA 390 HP) and run it at 55 psi. I have a 3/4" I.D. fuel rail and a return line located at the end of the fuel rail with a 0.060" restriction in the return line back to the tank. The large fuel rail and restricted return line eliminate all surging.

Check out this link for additional information that may help you make an informed decision.

http://realstreetperformance.com/sto...on-test-5.html

s2k-jn

Thanks guys! Sprry, had to change accounts around, but I'm still JN111112

yamahaSHO

I am running the stock pump with E85 on my NA and factory return-style setup. I don't think the return-less does quite as well. I believe Robert Thorne had to convert to a return-style (pre-2006) setup as he was losing fuel up top.

I do get fuel starve at anything under 3/4 tank on long left-hand turns. My plan is to work out something without having to add any external tank or pumps (maybe some type of baffling).

Breaking Point

I've been running a walbro 255 ony stock motor and ecu for a few years now.ally research pointed it to being an OE equivalent