I have a fuel question

buckethead151 · January 9th, 2011, 10:21 PM

I searched and I couldn't find what i was looking for. I want a to supercharge my stang but i only want to run like 8 psi maybe. I am wanting to do this cheap. (I know cheap is bad but i don't care lol) So here is my question. With only running 8 psi could I skip the injector upgrade and get an FMU to compensate? That is what the Vortech kit does. Is this a bad idea if i am money limited?

ryanw · January 9th, 2011, 10:31 PM

Upgrade your fuel pump to a 255 .... I think even if you were running only 5-6psi your going to need 24 pound injectors. Im thinking 30 pounders to be safe

buckethead151 · January 9th, 2011, 10:39 PM

Why did that kit not require fuel injectors then? I just thought it was odd. What FMU ratio will i need for 8 psi?

s351r13 · January 10th, 2011, 01:01 AM

The kits don't come with everything needed. You can go with a FMU but, for a few extra dollars you can get larger injectors. You will need a bigger fuel pum and I would install and fuel pressure regulator to be safe.

buckethead151 · January 10th, 2011, 08:25 AM

I know i need a larger fuel pump. The kit said the a Fuel Control Unit tricks the stock 19lb injectors into thinking they are bigger so you don't have to change the injectors. The Paxton Novi 2000 says the same thing. I am pretty sure this can be done but i wanted to know if it was safe. I know the right way to do it. I just am looking for an alternative.

AdderMk2 · January 10th, 2011, 09:55 AM

it doesnt trick the injectors, it loads a massive amount of pressure up behind them, which can (and has) caused failures in the injectors.

Including but not limited to... O-ring leakage, internal injector failure, eruption of the injector body, engine fires.

Some things that can happen to your car.
Fires, hydro-locked cylinders, melted pistons due to lack of fuel (failure dependent).

In short, just buy the right injectors and get the car tuned.

buckethead151 · January 10th, 2011, 03:09 PM

Originally Posted by AdderMk2

it doesnt trick the injectors, it loads a massive amount of pressure up behind them, which can (and has) caused failures in the injectors.

Including but not limited to... O-ring leakage, internal injector failure, eruption of the injector body, engine fires.

Some things that can happen to your car.
Fires, hydro-locked cylinders, melted pistons due to lack of fuel (failure dependent).

In short, just buy the right injectors and get the car tuned.

Thank you very much! This is exactly what I wanted to know. I really do appreciate you understanding what I was trying to ask. Now do you know anything about the FMU ratio i should get?

AdderMk2 · January 10th, 2011, 04:04 PM

um yea... none...

get injectors and a fucking tune

buckethead151 · January 10th, 2011, 05:39 PM

I know I need injectors. I was told that along with the injectors you need a FMU to add fuel to them. If i buy a tweecer will I be able to tell my car how much fuel i need without an FMU?

95opal · January 10th, 2011, 07:21 PM

Originally Posted by buckethead151

I know I need injectors. I was told that along with the injectors you need a FMU to add fuel to them. If i buy a tweecer will I be able to tell my car how much fuel i need without an FMU?

Your still not getting it. Upgrade your fuel pump, injectors, MAF, ditch the FMU and have it tuned. If you would like to try your hand at tuning get a moates quaterhourse. From the sound of your mustang experience I would leave the tuning to a pro. good luck

ryanw · January 10th, 2011, 08:39 PM

Originally Posted by buckethead151

I know I need injectors. I was told that along with the injectors you need a FMU to add fuel to them. If i buy a tweecer will I be able to tell my car how much fuel i need without an FMU?

For example...... Lets say you have 30 lb injectors but what you really need is 36 lb injectors, some times people will use the FMU that comes with the kit so they dont have to upgrade there injectors ( its the cheap way of doing it) but if you have 19lb injectors and if what your kit needs is 36lb then a FMU will not cut it. just buy 36lb-42lb injectors and get it tuned. you dont want the FMU. So with the correct size injectors a FMU is not needed. FMU are used when you dont have big enough injectors. do you understand now

03_StangGuy · January 10th, 2011, 08:59 PM

Adding extra fuel buy increasing the pressure beyond what its suppose to be is just asking for trouble. It will work but it wont last!!

If you really wanna do it cheap search, you can find used injectors cheap. People are always upgrading them. I sold my 42s cheap when I went to 60s.

buckethead151 · January 10th, 2011, 11:34 PM

Guys! I KNOW YOU HAVE TO UPGRADE THE INJECTORS, FUEL PUMP, AND MAF!!!! I thought a fmu was used regardless of whether you upgraded the injectors or not. I am done with that now I understand. Thanks to ryanw. I do have a question about the tuners though. Can i buy a used quarterhorse or tweecer? Or are they married to the car they were first put on like other chips are?

ryanw · January 10th, 2011, 11:58 PM

you can go to a dyno shop and have them imput a tune into your computer. Or you can buy your own tuner like what you were talking about ^^ i have no clue if there married to the first car there used on. I dont think so

buckethead151 · January 11th, 2011, 12:04 AM

Well i figure if people are selling them used they probably aren't married but you never know. I think if I play with a tuner enough i will be able to tune it myself. I learn pretty fast. I just have to deal with all the people who think I can't do it first. I am still in High School if it makes more since about me not knowing much

AdderMk2 · January 11th, 2011, 12:04 AM

let a shop tune your car. its going to be WAY over your head

buckethead151 · January 11th, 2011, 12:06 AM

Originally Posted by AdderMk2

let a shop tune your car. its going to be WAY over your head

Are you calling me stupid or something? I know I will probably have trouble with the thing at first but you shouldn't make assumptions about what people can do. I think if I mess around and do my research I will be able to tune it myself. How hard can it be? (Famous last words huh?)

s351r13 · January 11th, 2011, 12:40 AM

Tuners for the 94-95 are not married to the cars. 99-up are only capable of that. He's not calling you stupid. He's simply saying you don't have the experience to do it correctly without damaging something. You need someone with experience period. Its not something you can just "try" and hope you get it right. You'll do more harm than good. Learning curve on something like that will cost more than its worth.

ryanw · January 11th, 2011, 12:53 AM

Have the tune perfect could gain you alot of hp. Or if its wrong could lose you hp and even damage some thing, a shop that tunes your car does more then just program it, they test the tune on a dyno and keep making tweeks to it until its damb near perfect. Just pay atention to what Addermk2 has to say he knows his shit

buckethead151 · January 11th, 2011, 07:56 AM

Thanks for all the help guys. I'll be back with more questions when I start my tuning

January 9th, 2011, 10:21 PM	#1
buckethead151 Regular 1995 Mustang GT Join Date: Jul 2010 Location: Texas Posts: 119 iTrader: 0 reviews	I have a fuel question I searched and I couldn't find what i was looking for. I want a to supercharge my stang but i only want to run like 8 psi maybe. I am wanting to do this cheap. (I know cheap is bad but i don't care lol) So here is my question. With only running 8 psi could I skip the injector upgrade and get an FMU to compensate? That is what the Vortech kit does. Is this a bad idea if i am money limited?

January 9th, 2011, 10:31 PM	#2
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	Upgrade your fuel pump to a 255 .... I think even if you were running only 5-6psi your going to need 24 pound injectors. Im thinking 30 pounders to be safe __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

January 10th, 2011, 01:01 AM	#4
s351r13 Regular 1996 Saleen S351 Join Date: Jan 2008 Location: Manhattan,KS / Newnan,GA Posts: 173 iTrader: 0 reviews	The kits don't come with everything needed. You can go with a FMU but, for a few extra dollars you can get larger injectors. You will need a bigger fuel pum and I would install and fuel pressure regulator to be safe. __________________ 96 S351 #13 99 S351 #14 99 S351 #46 94 S351 #35 95 S351 #43 00 S281 #417 02 S281SC #117

January 10th, 2011, 09:55 AM	#6
AdderMk2 Banned Join Date: Aug 2007 Location: al-Ahhmadi, Kuwait Posts: 991 iTrader: 0 reviews	it doesnt trick the injectors, it loads a massive amount of pressure up behind them, which can (and has) caused failures in the injectors. Including but not limited to... O-ring leakage, internal injector failure, eruption of the injector body, engine fires. Some things that can happen to your car. Fires, hydro-locked cylinders, melted pistons due to lack of fuel (failure dependent). In short, just buy the right injectors and get the car tuned. __________________ [URL="http://providence.craigslist.org/cto/2148862880.html"]1994 Cobra For Sale[/URL] [SIGPIC][/SIGPIC] [QUOTE=Timm10221]Its only a 10 inch Tach that sits right in the center of the dash with LED lights and a Spinner bezel that has dimonds and gold plating.. And when you hit 4500 plus is sounds off (AAHHH SHITT) :cool:[/QUOTE]

January 10th, 2011, 04:04 PM	#8
AdderMk2 Banned Join Date: Aug 2007 Location: al-Ahhmadi, Kuwait Posts: 991 iTrader: 0 reviews	um yea... none... get injectors and a fucking tune __________________ [URL="http://providence.craigslist.org/cto/2148862880.html"]1994 Cobra For Sale[/URL] [SIGPIC][/SIGPIC] [QUOTE=Timm10221]Its only a 10 inch Tach that sits right in the center of the dash with LED lights and a Spinner bezel that has dimonds and gold plating.. And when you hit 4500 plus is sounds off (AAHHH SHITT) :cool:[/QUOTE]

January 9th, 2011, 10:39 PM	#3
buckethead151 Regular 1995 Mustang GT Join Date: Jul 2010 Location: Texas Posts: 119 iTrader: 0 reviews	Why did that kit not require fuel injectors then? I just thought it was odd. What FMU ratio will i need for 8 psi?

January 10th, 2011, 08:25 AM	#5
buckethead151 Regular 1995 Mustang GT Join Date: Jul 2010 Location: Texas Posts: 119 iTrader: 0 reviews	I know i need a larger fuel pump. The kit said the a Fuel Control Unit tricks the stock 19lb injectors into thinking they are bigger so you don't have to change the injectors. The Paxton Novi 2000 says the same thing. I am pretty sure this can be done but i wanted to know if it was safe. I know the right way to do it. I just am looking for an alternative.

January 10th, 2011, 05:39 PM	#9
buckethead151 Regular 1995 Mustang GT Join Date: Jul 2010 Location: Texas Posts: 119 iTrader: 0 reviews	I know I need injectors. I was told that along with the injectors you need a FMU to add fuel to them. If i buy a tweecer will I be able to tell my car how much fuel i need without an FMU?

January 10th, 2011, 08:59 PM	#12
03_StangGuy I Poop Entirely Way Too Much Blown 03 GT Join Date: Jun 2007 Location: Long Island NY Posts: 6,917 iTrader: 0 reviews	Adding extra fuel buy increasing the pressure beyond what its suppose to be is just asking for trouble. It will work but it wont last!! If you really wanna do it cheap search, you can find used injectors cheap. People are always upgrading them. I sold my 42s cheap when I went to 60s. __________________

January 10th, 2011, 11:34 PM	#13
buckethead151 Regular 1995 Mustang GT Join Date: Jul 2010 Location: Texas Posts: 119 iTrader: 0 reviews	Guys! I KNOW YOU HAVE TO UPGRADE THE INJECTORS, FUEL PUMP, AND MAF!!!! I thought a fmu was used regardless of whether you upgraded the injectors or not. I am done with that now I understand. Thanks to ryanw. I do have a question about the tuners though. Can i buy a used quarterhorse or tweecer? Or are they married to the car they were first put on like other chips are?

January 10th, 2011, 11:58 PM	#14
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	you can go to a dyno shop and have them imput a tune into your computer. Or you can buy your own tuner like what you were talking about ^^ i have no clue if there married to the first car there used on. I dont think so __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

January 11th, 2011, 12:04 AM	#15
buckethead151 Regular 1995 Mustang GT Join Date: Jul 2010 Location: Texas Posts: 119 iTrader: 0 reviews	Well i figure if people are selling them used they probably aren't married but you never know. I think if I play with a tuner enough i will be able to tune it myself. I learn pretty fast. I just have to deal with all the people who think I can't do it first. I am still in High School if it makes more since about me not knowing much

January 11th, 2011, 12:40 AM	#18
s351r13 Regular 1996 Saleen S351 Join Date: Jan 2008 Location: Manhattan,KS / Newnan,GA Posts: 173 iTrader: 0 reviews	Tuners for the 94-95 are not married to the cars. 99-up are only capable of that. He's not calling you stupid. He's simply saying you don't have the experience to do it correctly without damaging something. You need someone with experience period. Its not something you can just "try" and hope you get it right. You'll do more harm than good. Learning curve on something like that will cost more than its worth. __________________ 96 S351 #13 99 S351 #14 99 S351 #46 94 S351 #35 95 S351 #43 00 S281 #417 02 S281SC #117

January 11th, 2011, 12:53 AM	#19
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	Have the tune perfect could gain you alot of hp. Or if its wrong could lose you hp and even damage some thing, a shop that tunes your car does more then just program it, they test the tune on a dyno and keep making tweeks to it until its damb near perfect. Just pay atention to what Addermk2 has to say he knows his shit __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

January 11th, 2011, 07:56 AM	#20
buckethead151 Regular 1995 Mustang GT Join Date: Jul 2010 Location: Texas Posts: 119 iTrader: 0 reviews	Thanks for all the help guys. I'll be back with more questions when I start my tuning

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