Why not USE an FMU.

ZORT · #1 06-09-2002, 10:46 PM

Why not use a fuel management unit by Cartech or Vortech that is exactly what i will be using on my home made project. I still found the afc a little too much for 5-8 psi.

kris · #2 06-10-2002, 07:13 PM

Quote:

Originally posted by ZORT
Why not use a fuel management unit by Cartech or Vortech that is exactly what i will be using on my home made project. I still found the afc a little too much for 5-8 psi.

How much do those run? I am not looking at spending alot on my forst go here. So if it cost more than the safc, I will pass on that.

ZORT · #3 06-10-2002, 08:39 PM

From what I understand they run at about $80 to $150 still less than a AFC. That is partly the reason why i have decided on it. You can still add the AFC after when you have the change to fine tune it a step further. Still both of them don't run you into $1000 (ecu from Zydne etc)

FBP Si 2000 · #4 06-11-2002, 01:10 AM

You would need an FMU since you would need some sort of fuel management. Unless you went with the AFC hack. In order to tune the car with an FMU setup, that's where the S-AFC or V-AFC comes in. Unless you went the standalone route.

kris · #5 06-12-2002, 03:04 PM

Quote:

Originally posted by FBP Si 2000
You would need an FMU since you would need some sort of fuel management. Unless you went with the AFC hack. In order to tune the car with an FMU setup, that's where the S-AFC or V-AFC comes in. Unless you went the standalone route.

So, are you saying I would need a AFC, and the FMU? Or just one or the other?

pvang31019 · #6 06-12-2002, 10:58 PM

It's up to you...go ahead and get the FMu is you want fuel pressures in the hundreds....

FBP Si 2000 · #7 06-13-2002, 05:38 AM

You would be fine with a FMU.

kris · #8 06-13-2002, 10:52 AM

Quote:

Originally posted by pvang31019
It's up to you...go ahead and get the FMu is you want fuel pressures in the hundreds....

How about you explain please. Since this is a forum where we go to ask questions to learn.

pvang31019 · #9 06-13-2002, 06:53 PM

all the FMU does is increase fuel pressure....accompanied with an inline fuel pump....

you do not want to put this much strain on your stock injectors for a long time.

If anything, I would get some DSM 450 injectors and an AFC to control them

ZORT · #10 06-14-2002, 07:46 AM

Now if we put everything together we get the following. Running boost will take a lot of fine tunning. To fine tune cost effectively you need the alter the air to fuel ratios accordingly at different rpm ranges and boost levels. Of Course you don't need to do all this at the begining stage. So we can start with an FMU on stock injectors.
Then an AFC to tune the a/f mixtures.
Then bigger injectors so you will now have a little more fuel to run more boost.
The reason i didn't put the bigger injectors before the AFC is because we don't want to run to rich on idle.
Also from what i am reading you can use the AFC and bigger injectors with an upgraded fuel pump (if you like) and have the same result I am not sure if you will need a FPR with that. The only thing is that the AFC is $300+ so I am thinking that we will start small and go with an FMU for about $100 to start and you fuel pressure will always be important in the long run because like anything else you will always want more.

So people tell me what you think about this write up.

kris · #11 06-15-2002, 08:10 AM

Quote:

Originally posted by pvang31019
all the FMU does is increase fuel pressure....accompanied with an inline fuel pump....

you do not want to put this much strain on your stock injectors for a long time.

If anything, I would get some DSM 450 injectors and an AFC to control them

Okay, I picked up the DSM injectors. So I'm good on those. Now I need to look into a bigger fuel pump. I was looking at the 255lph Walbro High Flow and High pressure intank fuel pump, which was what this guy uses. So I should be good with that, right?

But the fuel pump, and te AFC will be the most expensive parts. So for now, just starting off. I should be good to go with the FMU, and stock injectors.

Rgacke · #12 06-16-2002, 03:10 PM

heres a good place to get pumps
http://www.autoperformanceengineering.com/

ZORT · #13 06-17-2002, 07:37 AM

Guys I went up drags this sunday and i meet up with a guy running a nissan turbo from an RB25 on a B18B engine with 310cc injectors and an FMU on 9psi.
And guess what STILL RUNNING LEAN ... LEAN ... DAMMIT.. MY PLAN. So maybe the FMU cannot work?? help.. So maybe I will have to get the following to be safe:

Fuel pump $$$
FMU $$$
S-fac $$$
310cc or 450cc injectors $$$

So any of you guy running 5-6psi on an FMU and Stock 240cc injectors and stock fuel pump alone?

kris · #14 06-17-2002, 07:49 AM

Quote:

Originally posted by ZORT
Guys I went up drags this sunday and i meet up with a guy running a nissan turbo from an RB25 on a B18B engine with 310cc injectors and an FMU on 9psi.
And guess what STILL RUNNING LEAN ... LEAN ... DAMMIT.. MY PLAN. So maybe the FMU cannot work?? help.. So maybe I will have to get the following to be safe:

Fuel pump $$$
FMU $$$
S-fac $$$
310cc or 450cc injectors $$$

So any of you guy running 5-6psi on an FMU and Stock 240cc injectors and stock fuel pump alone?

Not sure if you have these sites:

http://thenew.gamesbbs.com/~turbosi/
http://www.homemadeturbo.com/
http://www.turbocrx.net/

Just thought I would put them up for info...

ZORT · #15 06-25-2002, 05:30 PM

kbslacker and any one else notice that when you adapt the turbo to the hf or std manifold that the compressor housing is on the opposite side to the greddy kits. So for a 92-95 or up civic there would be no space if you wanted to run your air filter to pull in cooler air. Assuming of course you have a/c and power steering. Does anyone know why it could not go the other way is it because it wouldn't line up with the exhaust port from the header with out the turbine touching the engine?

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