Flex Fuel for MSM - Miata Turbo Forum -Boost cars, acquire cats.

Welcome to Miataturbo.net   Members

Engine Performance This section is for discussion on all engine building related questions. KMiata

LinkBack Thread Tools Search this Thread
Old 04-18-2016, 11:38 PM   #1
Senior Member
Thread Starter
Join Date: Feb 2009
Location: Philadelphia
Posts: 769
Total Cats: 40
Default Flex Fuel for MSM

Hey all, built MSM with an EFR6258 @20psi on it, makes 330 on 93, looking to add some extra, and hear E85 is a bit safer as well. I see FM sells the Continental Flex Fuel sensor, and my MS2e has the ability to run flex fuel as Rev told me, but I know there are a few possible limitations.

Walbro 255lph HP, will it be enough?
FIC 775cc Injectors, probably should step up to 1100cc
Fuel Lines, this is a biggie, do I need to replace them

I also see FM makes a Big Flex Fuel kit which I think has a bunch of things that I could do without like the big fuel rail, FPR.

So Miata friends, what is a basic (yet not ghetto), and relatively reliable way to do this for my situation?
Mazdaspeeder is offline   Reply With Quote
Old 04-19-2016, 09:21 AM   #2
Elite Member
iTrader: (17)
Join Date: Aug 2007
Location: Fort Myers, FL
Posts: 2,599
Total Cats: 98

My NA was around 370whp and the Walbro 255 wasn't enough, at least with stock lines. It just couldn't hold fuel pressure up top. I upgraded to a DW300 and it worked great for me. You'll definitely need more fuel than 775's can flow as well.

I picked up an NB and have similar power goals to you. I just converted the NB to a return system. I pulled the fuel return hardline off my NA when I parted it out. The line popped right in place on my NB. Some people have done a return with the NB evap line but I wasn't comfortable with the tiny line. Once the hardline was in place it's just a matter of swapping a couple hoses at the tank and engine bay. That will give you the ability to raise fuel pressure if needed and use boost referenced fuel pressure.
pdexta is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Miata Turbo Shuts Off faviles5566 DIY Turbo Discussion 37 04-11-2016 06:11 PM
Injector fitment hockey930 Engine Performance 4 04-02-2016 11:31 AM
V8R frame rails, trans crossmember RyanRaduechel Miata parts for sale/trade 4 03-30-2016 12:56 PM
Msm, which style of bov do you prefer? Troy Jordan DIY Turbo Discussion 17 03-22-2016 10:01 PM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 05:48 AM.