jakethesnake110

anyone who is using a fmu with their turbo setup plz tell me how its working for you and how long youve had the setup? and what kinda setup?

busa4

do not use an fmu. its not a tune. it just exponentially dumps fuel into the engine. this creates dangerously high fuel pressure, injector damage, cylinder wash out and a loss of power.
using an fmu is the cheapest way to boost your vehicle but it is not the correct way. spend the extra money on larger injectors and a custom tune.

turbos10

lol


i had one on my old crx with a 14b on 11 psi ran perfect for 2 years then i sold it. people who hate on them have never used them. i remember 15 years ago thats all anyone had. are they out dated ? yes. is there better options ? yes. but do they work ? yes so if thats all you can afford with the money you got than use it

busa4

this is true. they work but as i stated above they are not a tune. a tune requires more than just adding fuel. each rpm range of an engine requires a specific amount of fuel and timing when boosting. an fmu can not do this. it is not precise fuel metering and it doesnt control timing therefore you are sacrificing power. save the money and tune it. in the end you will be much happier.

jakethesnake110

thats exactly wat i wanted to use was the 14b, ahha and you ran it 2 years? holy ----, you just destroyed these fmu hater's ego's haha wat was your setup?

busa4

once again. yes they work but they are not a tune. you put an fmu on anything and it will be reliable. they been using them since the early 90's when there was no electronic options available. there cheap and they richen up the mixture under boost but they do not tune the vehicle. you will not gain the power per pound of boost like a custom tune will give you. fmu's are affordable if your boosting less than 6 psi. any more than that and your fuel pressure will reach a component damaging high pressure. the problem with this site is its name "home made". when the average user on here decides to build a turbo system that doesnt have a lot of money or knowledge of fuel systems, engine dynamics and turbo systems they look to experienced people for knowledge. ive built many turbo cars and motorcycles. i am well trained in auto mechanics and turbo systems. turbo systems are money pits to build and maintain so dont let money issues hinder your ability to make good decisions. spend the money on your build wisely and put some aside for a proper tune. you will thank me later.

if you decide to use and fmu which im sure you will because of one person who stated they used one for 2 years, make sure you keep the boost below 6 psi. if you decide to listen to me. find a tuner that is reputable. you will make much more power with the same boost rating out of a custom tune then you will ever get out of an fmu. that is all i have to say so good luck on your build and post some pics.

turbos10

89 crx hf
jdm zc motor
stock injectors
stock fuel pump
14b turbo with open down pipe
dsm side mount intercooler
vortec 12;1 fmu
11psi
timing retarded at the dizzy a lil bit
i put my friends ngk wide band in the car for a bit. the second it started to make boost it went strait to 11.8 and stayed there in every gear. a little on the rich side but where i wana be

i beat the hell out of it and it lasted ran really good. the guy i sold it to put a front mount on it and still drives it. ; )

i have done it everyway there is is fmu, vafc, chipped ecu, they all work and do what there supposed to. if i were you a would run it and have fun !

jakethesnake110

sounds good man, wat did you use to moniter your AFR's? im boostin my d15b2 here in the next couple months and theres absolutely noone around here that can tune? theres not any dynos around either haha. i live in the middle of no where, out in the country.. i wanna run about 8-10 psi, so i figured since i was on a budget maybe the fmu would be my route, an adjustable fmu and Aem FPR and fuel rail and then run stock bottom end.

Dx 101

man this is why i stoped coming here. noobs just dont listen. please post pics of blown motor after going lean
edit: shouldnt this b moved to engine management?

jakethesnake110

man what the ---- dont you understand about noone tunes around here? damn, everyones always downing people on here. wat the ---- does it matter? it aint your motor? so stop hating on other peoples ---- man. this is the only option that i have? no i dont wanna go this route, but its my only choice it seems?