FMU's
 

I just recently heard about these things, the concept seems pretty neat.

I am aware that they are no replacement for a fuel map though.

Running pretty conservative boost pressures on my tercel, which has 155cc injectors (say 10 psi max on a T25), are these things reliable enough and will they provide enough fuel to not ---- ---- up?

I would like to hear some user feedback :)

FMU = Lame. There is no control. all it does is ups the fuel pressure under boost. They do work and it is the old school way to run fuel. You will need to upgrade your fuel pump because it won't be able to keep up and it will run way rich. Save your money and do real tuning.

fmu is junk

i think the fmu would ---- up the tercel injectors .. those are such low flow

people run fmus on turdcels all the time but i would recomend a better fp

fmu's are junk unless you spend big bucks... get it chipped, a lot more reliable and less room for error

no one makes a tuning program for a tercel so unless you want him to run a megasquirt fmu is his best option. remember it is just a tercel not a bmw

F
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my bad... got ahead of myself. what you could do if you are looking to do it on the cheap side (still not very cheap) is get a fmu like apexi sells and have it tuned by a professional. i had an apexi neo in my prelude before i knew any better it did okay for what i had but was definitely not a megasquirt or anything like that. could go that route and retard your timing by cam gears/msd setup but if you go any of these routes your talking a lil money. but hey it beats spending big bucks fixing your blown engine.

try posting this in the engine management section. you might get better replies in there.

Oh yeah that's a good point cleve.

I was planning on doing megasquirt (neat project for me and my dad to learn more about building maps, he's pretty good with his EFi and such; licensed toyota hybrid tech..) or AEM Fuel Ignition Controller.. The cheap (and "better")way to do it is with bigger injectors, an SAFC an a wideband..

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lol tercel

everyone cuts up fmu's but i ran one for months and had no issues, although i used a aem adjustable one with wideband which obviously helped

well good for you it does not change the fact that they are complete ----, but some times you have to use them i would never put one on a lamborghini though but i would not think twice about putting one on a terdcel

i have run an fmu with no mechanical problems... ran a 14.33 1st time at the track... now i'm tuned and it feels much faster but haven't gone back to update times yet

While FMU is not the best thing out there it's way better than not running some sort of fuel management at all. If Piggyback like SAFC/Emanage, Rom Tuned ECU, and Standalone ECM is not an option whatever reason that may be. Then your option is look up the best FMU unit out there that is reliable and fully adjustable. There are 2 good FMU's in my opinion and its the new Synapse FMU and BEGI FMU. Both of which has full adjustability on the ratio which 1:1 to 12:1. Best thing is that it will also replace your current FPR. This will be an all in one unit. Main thing with this FMU is to be able to adjust on the fly rather having to swap a disc for the ratio your looking for. Note that running too Lean or Rich has the same damaging effect to the motor which is the drawback of most of standard FMUs for it cannot dial in exactly to the proper ratio you need for your setup. PS you will need a reliable/high volume fuel pump and fuel hose with higher burst rating. GL with the project!!