FMU + Stock Fuel Pump?
04-26-2008, 12:37 PM
#21
1.0 BAR
Join Date: May 2005
Posts: 423
Re: FMU + Stock Fuel Pump?
if cornfuzed could actually get someone to reflash the stock ECU, you'd be better off dumping in some other stupid big GM injectors (3800SC maybe
)i'm sure they're SOME standard size...
Walbro+bigmofoinjectors+ECU tune=win
but cornfuzed's gay *** wont do it, or will royally ---- it up, please please please please please, if you ---- it up, post up some pics
)i'm sure they're SOME standard size...Walbro+bigmofoinjectors+ECU tune=win
but cornfuzed's gay *** wont do it, or will royally ---- it up, please please please please please, if you ---- it up, post up some pics
04-27-2008, 01:54 PM
#22
0.0 BAR
Join Date: Aug 2007
Location: Okotoks, AB
Posts: 0
Re: FMU + Stock Fuel Pump?
Go look in the black hornet gets old skool durrty boost thread, we ran 7psi out of a t3, it gets a little lean after 5psi. But the 10:1 obx FMU wasn't enough, we ended up just using vice grips on the fuel return.
IMHO FMU's are not worth the money, just grab some vice grips, runs a little rich in vacuum, but way better in boost.
IMHO FMU's are not worth the money, just grab some vice grips, runs a little rich in vacuum, but way better in boost.
04-27-2008, 05:40 PM
#23
1.0 BAR
Join Date: Oct 2003
Posts: 501
Re: FMU + Stock Fuel Pump?
my friends running chrome on a ls motor with 550's
pushing 14psi now on a stock fuel pump
we've went to 16psi...and never went lean
hes been daily driving it for 7months now on 14psi
and not one problem.cept for a lil blowby
tuning is awesome
pushing 14psi now on a stock fuel pump
we've went to 16psi...and never went lean
hes been daily driving it for 7months now on 14psi
and not one problem.cept for a lil blowby
tuning is awesome
09-21-2008, 12:18 AM
#25
3.0 BAR
Thread Starter
Join Date: Jan 2007
Posts: 1,563
Re: FMU + Stock Fuel Pump?
Originally Posted by dankoneon81
have you thought about using a megasquirt? you dont have to use the full ability of the ms for standalone. it cam be used for fuel only with great sucess!!.
You're dumb. Kill yourself.
09-22-2008, 06:51 PM
#28
1.0 BAR
Join Date: Apr 2008
Posts: 429
Re: FMU + Stock Fuel Pump?
Originally Posted by cornfuzed
so a wlbro 255, then a decent quality fmu and all i have left to do it the physical work and find someone that can either reflash the ecu or a piggyback that can be retrofitted
and im good?
yes i know there is that thing called a turbo but already know in general what turbo i am running and im thinking about 2inch piping
i know it's small but the tb is so small that i don't believe that 2inch throught would be any worse than 3inch but still having to go throught a tb of about 1.75-2inches
(plus there is not allot of room under the hood so smaller piping means more room)
and i think i am going to run an ebay 32x6x2 intercooler with 2.25inch inlet and outlet
would it be ignorant to think that a decent dyno shoppe could tune the car to run like a chipped turbo civic (not power wise more like reliability wise but i don't want to add the turbo and do all the work and only gain 10-15hp if i was going to do that i would throw on a cold air intake and put in an exhaust cutout before the cat
one thing what ratio fmu would be needed?
and would stock injectors with the walbro 255 be good or should i also see if dsm 450's will work? (i see them on here for like $50 so their cheap but i don't know if they would need modified or not)
and im good?
yes i know there is that thing called a turbo but already know in general what turbo i am running and im thinking about 2inch piping
i know it's small but the tb is so small that i don't believe that 2inch throught would be any worse than 3inch but still having to go throught a tb of about 1.75-2inches
(plus there is not allot of room under the hood so smaller piping means more room)
and i think i am going to run an ebay 32x6x2 intercooler with 2.25inch inlet and outlet
would it be ignorant to think that a decent dyno shoppe could tune the car to run like a chipped turbo civic (not power wise more like reliability wise but i don't want to add the turbo and do all the work and only gain 10-15hp if i was going to do that i would throw on a cold air intake and put in an exhaust cutout before the cat
one thing what ratio fmu would be needed?
and would stock injectors with the walbro 255 be good or should i also see if dsm 450's will work? (i see them on here for like $50 so their cheap but i don't know if they would need modified or not)
Enjuku avatar? No 240?
Change your avatar to read "i'm gay, i'm boosting an aveo"
Superstreet did it but they used a cobalt motor and added a supercharger. It was still gay with a tripple naws energy drink cup holder and ugly *** konig rims.....
I'd be damned if i boosted an n/a car on a stock pump. If you can't afford $90, buy a xeno pump or check craigslist. Hell, even try going to the junkyard for a pump. You'd be surprized what you can find.
09-27-2008, 09:48 PM
#29
1.5 BAR
Join Date: Oct 2005
Posts: 1,490
Re: FMU + Stock Fuel Pump?
yes oem pumps from turbo 4 cylinder cars work great just picked one up today for a husteled price of 27 
at pick and pull still worth it though other jy only charge like 13$ thats how much my first one was
at pick and pull still worth it though other jy only charge like 13$ thats how much my first one was
09-28-2008, 02:29 AM
#30
3.0 BAR
Join Date: May 2005
Posts: 1,811
Re: FMU + Stock Fuel Pump?
psi is meaningless. how some people can answer its too much or too little without knowing the turbo in question is just as meaningless.
If you're talking anything less than a t4 class turbo, yeah >/= 5 should be fine.
10, 12, 14:1 are BIG pressure ratios. That's why most people running t3 equiv or smaller turbos on FMU's run so ------- rich that they add alot of boost too it thinking they're ok. Then they blow up.
FMU, colder plugs take a couple of * of timing out of it. its aight. did a kid's afew streets down on a 42/48. 8:1 fmu, took 3* of base timing, put in 1 step colder NGK copper plugs, internal wastegate at 8psi. its run like top for a year and a half. hair rich, but not annoyingly so.
Now you wanna say is it okay on like a t3/t4+ class turbo. No probably not without somewhat larger injectors ontop of that.
what are D16Z6 injectors? correct me if im wrong 255cc?
If they're all mint condition (probably NOT).
Call your stock fuel pressure 40psi cause its all old. The stock FPR will rise at a 1:1 manifold ratio until it bottoms out. 12:1ratio x 5psi = 60psi.
255cc injectors @ 40psi run at 100psi = 400cc injectors.
That's about 300-320hp worth of fuel depending on how lean you want it.
Now... First off you're not going to see 100psi of fuel pressure, and if you do you're not going to see a good amount of flow at 100psi of fuel pressure LoL! econdly you're HEAVILY trusting old injectors to supply their rated flow. Maybe one will, two will be kinda close and one wont be remotely close. Just wont matter in a stock N/A engine enough to realize it.
So yeah... WAY TOO MUCH ------- fuel for 5psi on a t3 turbo. For that matter with a manly high pressure pump and MINT injectors 10psi on a t3 class.
FMU's are not an unviable, ---- thing alot of people make them out to be. What MUST be understood is that to really do something you need reliably working injectors and a pump that can supply the pressure possible. You also need to run whatever boost gives you the right ratios. Not too much (blow up) and not too little (runs like ***).
If you're talking anything less than a t4 class turbo, yeah >/= 5 should be fine.
10, 12, 14:1 are BIG pressure ratios. That's why most people running t3 equiv or smaller turbos on FMU's run so ------- rich that they add alot of boost too it thinking they're ok. Then they blow up.
FMU, colder plugs take a couple of * of timing out of it. its aight. did a kid's afew streets down on a 42/48. 8:1 fmu, took 3* of base timing, put in 1 step colder NGK copper plugs, internal wastegate at 8psi. its run like top for a year and a half. hair rich, but not annoyingly so.
Now you wanna say is it okay on like a t3/t4+ class turbo. No probably not without somewhat larger injectors ontop of that.
what are D16Z6 injectors? correct me if im wrong 255cc?
If they're all mint condition (probably NOT).
Call your stock fuel pressure 40psi cause its all old. The stock FPR will rise at a 1:1 manifold ratio until it bottoms out. 12:1ratio x 5psi = 60psi.
255cc injectors @ 40psi run at 100psi = 400cc injectors.
That's about 300-320hp worth of fuel depending on how lean you want it.
Now... First off you're not going to see 100psi of fuel pressure, and if you do you're not going to see a good amount of flow at 100psi of fuel pressure LoL! econdly you're HEAVILY trusting old injectors to supply their rated flow. Maybe one will, two will be kinda close and one wont be remotely close. Just wont matter in a stock N/A engine enough to realize it.
So yeah... WAY TOO MUCH ------- fuel for 5psi on a t3 turbo. For that matter with a manly high pressure pump and MINT injectors 10psi on a t3 class.
FMU's are not an unviable, ---- thing alot of people make them out to be. What MUST be understood is that to really do something you need reliably working injectors and a pump that can supply the pressure possible. You also need to run whatever boost gives you the right ratios. Not too much (blow up) and not too little (runs like ***).
