onequikson

I have a 94 fd with BPU's and was looking to get a little more power. I found a RP upgraded fuel system kit which includes; pump, regulator, secondary fuel rail and 1600cc injectors. I was wondering if 1600's were to much of an overkill for my set up. P.S. Steve is gonna be in my town around the beginning of April. So I am looking to do any fuel system upgrades I can accomplish in that timeframe. Any positive feedback would be extremely helpful.

alberto_mg

what the hell is a BPU?

onequikson

Basic Performance Upgrades

BlueRex

Some say it's Bolt-on Performance Upgrades. Whatever your preference...

onequikson

Thanks but what about the fuel system. I am realy pumped to have Steve tune my car and I kinda need to figure out which way to go. Even if someone could point me in a different direction.

G's 3rd Gen

iTrader: (11)

what mods do you have?? That would require adding fuel? need to know all power affecting mods here.......

ijneb

what are "basic performace upgrades"?
a downpipe, intake, catback? no fuel
add a midpipe and intercooler? not without ECU
mix in a standalone? upgraded fuel will be good.

The only time you need to upgrade your injectors is when you are hitting 85% duty cycles.

bigger injectors need a standalone to be run.
you can upgrade your fuel pump, but i think without upgrading your injectors, it is infact overkill because the injectors are whats slowing the system down at this point.

TwinTriangles

As stated above what mods exactly are you running currently and what are your plans for the car later. Upgrading the fuel system early is obviously a good way to do it if your going to do allot of mods in the future perhaps go single... If your going to stay pretty much stock then 1600's would be a bit much, But if the cost of the fuel system kit you feel is reasonable then do it.

onequikson

I am runnig; dp,mp, cat back, intercooler w/upgraded piping, greddy intake elbow, ngk plugs, ngk 10mm wires, pfc, all on stock twin turbos. My plans for the future are to either get upgraded twins or a mid sized single turbo. Reliability is important. The kit for all of the above is $995. I am infact hitting 85% duty cycle. The reason I am considering this upgrade on bpu's is that I was under the inpresion that if I added more fuel, then I could add more boost = more power. right?

onequikson

Is this a bad idea for my set up

jeremyb

Depending on how high you want to boost, your octance comes into matter also. Throwing in extra fuel of 91 octane will not suffice 20 boost for example. The injectors just allow you to throw more fuel in, they don't let you run high boost with normal street gas.

Jeremy

ijneb

How much PSI are you running now?

Is the engine ported?

If you know how to change the settings on the PFC, then you could go ahead and get the fuel kit and instal it. Installing bigger injectors IS NOT plug&play. I would suggest not changing anything, and having the fuel stuff installed and whatever else you install done at the same time.

TwinTriangles

Go ahead and get the kit if you want, Steve can setup your PFC to be perfect with your setup... Upgrading the fuel system will allow you to run more boost, You probably wont be able to run more than 13-14psi on your twins

onequikson

right now I am running 10-11lbs of boost. This is the stock engine and it has not had any work done to it. So if I get 1600cc secondary injectors do I need to upgrade my primary injectors also. How much power do you think I will actually get from this kit.

alberto_mg

you need to spend some time clicking the search button. search for maxcooper and go to his web site for some good info on when you need to upgrade the fuel system. 85% isn't too bad at all for duty cycle.

ijneb

you wont gain any power from the kit. All this kit does is provide more fuel for running more boost.

onequikson

I was under the impresion that 85% duty cycle was pretty much the limit, then you needed to upgrade the fuel system. thanks for the info.

TwinTriangles

If your paranoid then 85% is the limit. It personally wouldnt bother me to see my injector duty at 95% all day but thats my limit... Since steve is coming here and you have the money you might as well get the kit, install it and have him up your boost a bit, that way you wont have to worry about it later. Do you have some kind of boost controller ?

onequikson

As I stated b4, I have a pfc to control the boost. So let me get this strait, more fuel and more boost does not equal more power? not triing to argue I'm just confused.

ijneb

Yes, more fuel and more boost does equal more power, but you said- And by simply installing this kit, you will see no gains over the stock set up.

fastcarfreak

You probably would be better off with 1300 cc injectors to replace your secondary injectors. From my understanding they are direct bolt on. Then you can get an upgraded fuel pump and a fuel pressure regulator and you will be all set for steve to tune your car for a little more boost.

I will add to the convo that a lot of people feel that the power fc is a very poor boost controller. If i were you, i wouldnt take that chance of blowing a motor and i would upgrade to a profec b spec II or something.

Adam

TwinTriangles

You will probably need some kind of boost controller, I used to used my PFC for boost control and it would only control it up to 11-12psi but if it was too cold outside I would get some creep. I think the PFC works great for keeping boost at stock levels but not too much more than that.

onequikson

so ijnb, why wont I see any gains from this kit. Is it just because I need a better boost controller. Once again, thanks for the good info. keep it coming!

jpandes

Don't the 1600cc secondaries require some sort of resistor do-hicky insatlle dinorder to allow you to run them?

I run the PFC and a Manual Ball & Spring boost controller @ 14 PSI NS

WolfpackFD3S

You will see gains if you up the boost thanks to the extra fuel. He was saying that if you install the kit and don't do anything else you won't be seeing any more power than before, your duty cycles will just be lower. You need a seperate boost controller like everyone is saying other than the PFC, I am putting a Profec B Spec II in, they seem like a nice unit to do the job.

-Rob