Proper Fuel Supply FOr Boosting

[Bryson]

I've rea da lot of posts on this, but a lot of people are trying ot do this as cheaply as possible to allow for 7-9 PSI

I was wondering if this is all I need

Hi FLow Fuel Rail /w 50lb. MSD injectors from....http://www.jgycustoms.com/fuelrails.htm

a walbo fuel pump

Then either an S-AFC orE-manage with Laptop enhancements.

Is this setup all I need? is it enough for 10-14 PSI? Will the e-manage work with a KA24DE(T) and will it allow the the use of the MSD injectors?

THanks for the help guys.

[encasemyheart]

I also had a question about this subject, sorry i don't mean to hijack your thread:

To add fuel when in boost, an FMU will work, and so will a JWT ECU upgrade, but will others like the Apex S-AFC or other piggyback computers add fuel when boosting?

[Wolf240SX]

if you want to go with 10-14 psi here are the things that you will need:

1. pistons and rods ( at 10 -14psi you will probably bend the stock rods.)2. 370cc injectors will be enough. 3. F.M.U. Fuel management system with a 7-1 ratio 7lbs fuel for every 1lbs of boost. or a reprogrammed ecu.4. boost controller.5. piggy back system for air/fuel ratio or reprogrammed ecu.

I myself ahave the FMU with piggyback air/fuel ratio computer I have not built the bottom end so I am not taking it above 10 lbs of boost I am currently running 7lbs.

[Wolf240SX]

yes a piggy back system should work because you are bypassing the ecu and running the fuel system with the piggy back system within the ecu limits.

[encasemyheart]

Okay so instead of an FMU or JWT reprogrammed I could just pick up a S-AFC. Thanks for the info.

[Bryson]

Thanks for the reply Wolf, I knew the boost controller and prolly pistons, I should have been more specific and ment need for fuel system only.

Now what exactly do you mean by FMU? That'd be an e-manage or SAFC right?

Also, wanted to throw in there... are the things that I put in my original post all I would need for a complete fuel/injector system? regardless of whether its overdone/struggling... I just want to know if I buy those above things, will my fueling be complete.

And... what PSI would the first setup support granted it is infact a complete fuel system.

[encasemyheart]

The FMU is an inline thing which increases the fuel pressure a certain preset amount per psi of boost. It is only active while boosting so it doesn't affect anything else. If you have a 10:1 FMU it increases fuel pressure 10psi for every 1 psi of boost, 8:1 = 8psi fuel pressure increase per pound of boost.

Your first setup looks complete except you may want to add a fuel pressure regulator.

[d240t2]

Stock rods are good to over 10-14psi.

If you are running larger injectors, don't use an FMU. Save the FMU for low boost, <7psi, on stock injectors. 50lb injectors will support at least 350rwhp.

If you get the rail and larger injectors, you need something to control them...JWT ECU, AFC, or standalone. You don't necessarily need an adjustable fuel pressure regulator for any of these setups...they are a waste of money in my opinion for most applications.

http://www.unstable-hybrids.com , we also have a top feed fuel rail and injectors.

Dennis

[encasemyheart]

for low psi applications (say 5 psi) with stock injectors, an S-AFC and fuel pump should be adequate fuel mods to control everything, correct?

[Bryson]

Thanks Dennis thats what I was lookin for.

Why do you charge 300 for the injectors when the place I mentioned above would = out to 260.

I am not trying to flame you or be a prick... just wondering what difference yours has.

[Jeff240sx]

Wiring harnesses so you don't have to rewire the MSD connections into the KA wiring harness.-Jeff

[Bryson]

Well ****, that sounds good. Guess I'll take the unstable route