what do you think about the FMU+pump setup?
 

Just wondering what you guys think about this as far
as reliability goes.

I mean, I know the afc hack, or a computer system would be better, but thats all out of my pricerange.

I just dont want to finally get my kit together and then kill my engine an hour having boosting.

I've got a d15b7, and plan on 7psi(but 5-6 to start off with, to make sure everythings running right).

I duno.. any thoughts are very welcome

Re:what do you think about the FMU+pump setup?
 

fmu/ pump works fine on mine...5 psi for now on a d16y7

Re:what do you think about the FMU+pump setup?
 

FMU's good, cheap, and reliable. The main setback is that you can't tune it.

Re:what do you think about the FMU+pump setup?
 

you can tune it by limiting the amount of boost it sees(leans it out)

Re:what do you think about the FMU+pump setup?
 

I have a d16 running 8 psi with the vortech fmu and under boost it runs rich. Was going to install a 255 lph but decided not to and the car runs great 3 weeks of boost now.

Re:what do you think about the FMU+pump setup?
 

hmm, sounds good!

Re:what do you think about the FMU+pump setup?
 

wow so you haven't even needed the upgraded fuel pump? That is nice.

Re:what do you think about the FMU+pump setup?
 

dang is that a good idea? i was told that with a turbo setup you HAVE to upgrade the oil pump to a 255 at least...

you've only been running it for 3 weeks so lemme know if anything happens...

is there anyone else who has ran a turbo setup without upgrading the fuel pump?

Re:what do you think about the FMU+pump setup?
 

i just added an inline, no problems yet...boostin about a month now

Re:what do you think about the FMU+pump setup?
 

yeah im running at tdo5h at 8psi on a d15b7 with fmu, its been great for 2 and a half weeks now

Re:what do you think about the FMU+pump setup?
 

so wait you did add an inline pump or no?

Re:what do you think about the FMU+pump setup?
 

Hmmm, anyone else have any commonts on this setup?
positive or negative?

i'm still not sure

Re:what do you think about the FMU+pump setup?
 

I started off with your setup as my main option being that i have limited funds at the time. I now thikn that SMC+ and 450's and an intank pump is a better route. This way you get some of the tunning campabilities without the high cost and you dont have to worry about a FMU putting too much pressure on your fuel system and being hard to tune. A SMC plus cost like 115 new which is about the cost of an FMU and DSM's are under 100.
http://userwww.sfsu.edu/~ecg/smc.htm
oh and read the "SMC help"post under engine management.

Re:what do you think about the FMU+pump setup?
 

woah,
I havent considered this smc+ before,
I thought the safc was the only option for cheap tuneability. and even that is too much cash(2-300 for just the safc)

Hmm, i'm definetely considering this,
thanks!

Re:what do you think about the FMU+pump setup?
 

when I had a turbo teg I really liked the way it ran with the fmu (drag kit /w 12:1 vortech and stock injectors)... to mean it seemed to run very smooth (although rich), when I upgraded my injectors the car never ran as smooth, but I made great power (that was before the smc, or hack... I just used 370 injectors, an 8:1 and an afc)

a high flow fuel pump is a must though.. you will be really mad if yu smoke a motor to save yourself $100

Re:what do you think about the FMU+pump setup?
 

i dont think the fuel pup has to be 255 lph, the vortech supercharger for my car comes with a 155 lph fuel pump, you only need a 255 for like a supercharged mustang gt

Re:what do you think about the FMU+pump setup?
 

the high pressure fuel flow is what is important with a fmu set up, you need a pump that flows good at 100+ psi because the standard ratio is 12:1 which gives you about 120psi of fuel pressure at 7 psi of boost.. the average fuel pump is not up to the task at those pressure levels

Re:what do you think about the FMU+pump setup?
 

Actually I think the 12:1 on the FMU means that it increases fuel pressure by 12 per puind of boost which would be 7* 12 =84 and if stock is 32 then that puts you at 116 ..opps my bad 120 is right i was thinking 84 total not extra.

Re:what do you think about the FMU+pump setup?
 

I am am thinking of a very similar setup on my D15B7 budget setup... any of you guys using intercoolers? should I just go with a SMIC? Is one of those big custom Tyrus IC's a bit too much for 7 psi?

Re:what do you think about the FMU+pump setup?
 

hey, one thing I know,
if you can afford a great ic, get it.
I got a cool rx7 one, from a 3rd gen rx7,
I like it cuz I used to have one of those cars, so its like a keepsake,hehe.

but yeah, better intercooler = colder air = more reliability = good for our little motors :)