cheapest way of fuel management
 

What would be the cheapest way to provide fuel for 7 psi on d15b7 del sol?
Would it be a walbro pump, and a fmu using the stock 240cc injectors. Or i heard about getting 310 cc injectors for it. How about a FPR, is that necessary when you have a fmu? Should i get safc for 7 psi?

Re:cheapest way of fuel management
 

the cheapest? probably a FMU setup,

Re:cheapest way of fuel management
 

FMU is nice, easy, and hella reliable.

Re:cheapest way of fuel management
 

I heard about some voltage divider thing using a power transistor and pots or something for under 20 bucks, lol...

Re:cheapest way of fuel management
 

Man you might as well fork out a few extra bucks and get it hooked up right bro. Whats an extra 100 compared to blowing your ---- up? I was looking at a new pump and an fmu for like 200 then I got my AFC and 390cc injectors for like 250. Had to wait like a week longer but hey it was worth it. The afc has a much better transition to boost and you wont have to run pressure bleeders. Definetly the best bet to spend an extra few bucks in my opinion.

Re:cheapest way of fuel management
 

I keep reading that with and AFC, it's like running a stock turbo car.

I experienced that with the FTB hack, too with no noticable bogging or anything at part throttle, but to no avail, I blew my ---- up.

Re:cheapest way of fuel management
 

im a bit confused ,whats the difference between a FMU &FPR. Is a fmu a rising rate fuel pressure reg ??Can i use a MALAPASI RISING RATE FPR??.Or is vortech the only people who make a fmu??

Re:cheapest way of fuel management
 

FMU= Fuel management unit
FPR= Fuel pressure regulator.
FMU is acctually whatever fuel management unit, but here they refer it to an FPR.
the 20 bucks voltage devider thing can work really well it's just like tha AFC hack, but you set it at one setting for the entire rpm band like -40% from 1000-8000 rpm on the AFC. It lets you run boost til 10-11 psi depends on your map sensor just like the AFC hack. If you have a honda With the ECU mod and Ghettodyne you can make the car run a bit richer if it leans out with the FTB.

Re:cheapest way of fuel management
 

George Ricketts has posted some OBD0 code to PGMFI that acts like an AFC boost hack... you can edit the maps in one of the versions of Ghettodyne 1.0x (I can supply if needed) although the pressure headers will then be mislabelled as Ghettodyne assumes it is a stock program.

Uberego, er - I mean Uberteg, on HT (and sometimes here, but rarely) is selling OBD1 boost chips for $100. He recommends using an AFC to tune them... if you have a friend with an AFC, you can tune it with that and once you know the settings Uberteg reprograms the chip for free.

Both would require ~450cc injectors and a little over $100. For the OBD0 route you buy a chip burner and blank chips, for the OBD1 route you buy a chip and pay some shipping. You get real ECU based fuel controls with full control of both fuel and ignition for a stupid cheap price... none of the aforementioned options do that w/ the exception of filetofit's (or my) MAP limiter circuit and chip.

I really really need to get a chip tuned for one of Jeff's cars and send it off for him to review. I think he'd like it a lot.

Re:cheapest way of fuel management
 

smc+ & DSM 450's. 150 max. plus you can run it all the way up to 14psi. and the smc+ serves as a missing link to!

Re:cheapest way of fuel management
 

I've tried forever to find a SMC but I can't!!!!!! I followed the link you gave me before, and the link on the projects page, but they didn't work.

Re:cheapest way of fuel management
 

My OBD1 boost code is $100, $50 for dsm 450's are ur set :p And its not a crappy hack liek the SMC, its real boost code.

Re:cheapest way of fuel management
 

that's nice of you UberTeg

Re:cheapest way of fuel management
 

i'm not nice, i' an assshole, dont forget that :p

Re:cheapest way of fuel management
 

What is SMC?

Re:cheapest way of fuel management
 

Use a pressure switch to turn a cold start injector on when you get boost. Make sure you fine tune the fuel pressure and injector on pressure using an air fuel meter. Worked well on several cars for me! including a D16 running 7 psi.
Pretty nasty but it can work quite well if you get it set right.

Re:cheapest way of fuel management
 

George Ricketts has posted some OBD0 code to PGMFI that acts like an AFC boost hack

I can't find it.

Re:cheapest way of fuel management
 

Steedspeed, that works, but the average cold start injector is good for ~25 hp. Some are higher flow (Merv V8? Others?) but I'm not up to speed on which. I've talked to people who have run some staged setups using those and are pretty happy. I recommend that you tune it nice and rich, as anything else is a bit dangerous ;)

The Bosch cold start injectors are nice for several reasons - they have flanges so you can bolt them all sorts of nifty places and they like to be run at 100% duty cycle - you can just run 12v from the battery to them and it won't hurt them like a regular injector.

One of the Dodge sites had a nifty DIY opamp circuit to cut a cold start injector on/off if you went too lean under boost. You could adjust the MAP voltage (boost) it turned itself on at, as well as the O2 voltage it turned itself on at. Very creative. I can see your engine bay getting pretty messy if you don't think out how to implement all the injectors, though.

Semnos, the file you want is 3/4 the way down this thread, but you need to sign up for a free PGMFI account to access the ROM section the thread is at. http://pgmfi.crx-forum.org/phorum/re...10&i=292&t=292

Re:cheapest way of fuel management
 

oh ok thanx I'm already signed in ;D
I got my injectors today, but the weather is bad (raining).
Going to put it in my other intake manifold and swap it with the one in the car.

Re:cheapest way of fuel management
 

Oh sweet no FTB hehehe have to convert to electronic advance first....Can I put a 2 bar MAP with this??

Re:cheapest way of fuel management
 

Hey Joseph If I put in the 450cc injectors with the George hack, Will it compensate for the 450cc injectors?

Re:cheapest way of fuel management
 

George's MAP sensor cut is a little bit more than the usual -40% AFC cut. You can just toss 450cc injectors in there and drive as long as you aren't forced induction - the fuel maps are way too lean to just boost on IMO. You have to fiddle it a bit.

When you alter the .bin in Ghettodyne, the pressure headings at the top are no longer correct, as the last 5 columns are your boost zone.

You can run a GM 2 bar MAP with it, yeah, but then you're going to have to refigure where everything is in Ghettodyne. It's a jump from a vaccuum-11.8 psi scale to a vacuum-14.5 psi scale, so the difference between a regular AFC hack and an AFC hack with a GM 2 bar isn't very big. The big difference is that the Honda MAP can't see above 9.25-10.65 psi depending on it's era.

Re:cheapest way of fuel management
 

K
Thanx again.
Just my bad luck..the PM6 ECU I got is the same as the PM7 i got >:( They don't have an external EPROM I have to make a board etc...hmmm oh well.

Re:cheapest way of fuel management
 

Try a 2 inch fuel rail with 4 bosch fiel pumps from the old BMWs in place of injectors. Crank the boost to 50 psi and dont blame me if it dosen't work!