I have a problem with my hyundai coupe fx 97, garret T25 makes a pair of weeks installs a turbocharger to him (boost gauge, oil pressure gauge, greddy full to autotimer, blitz super sound blow off, Garret T25, fuel regulator N.O.S, porch 911 intercooler). at first we left it loading 0,7 psi but in high revolutions in 3,4 and 5 march with the almost thorough foot the car stuck pulls, thinking that it was lack of fuel I bought a regulator fuel which we placed in the hose where the fuel is given back to the pool, but the car followed equal, after this we lowered the pressure of turbocharger 0,5 psi and walks better although equal stepping on the thorough accelerator the car sticks the pulls, I have been put in contact with Chris Kambouris by mail that is helping me who I asked to him if needed a new fuel pump we thought that it is not necessary that it can be another one thing. i uses the stock fuel pump and fuel management. That it could be happening? thanks for your help

[ April 15, 2003, 04:37 AM: Message edited by: Demonio ]

 

It sounds like you are reaching the limits of the stock fuel system.

You will most likely need, bigger fuel pump, bigger injectors,
and some sort of fuel and/or ignition management.

dont do the foot to the floor thing too often until you fix it up.

Chris can provide most of the parts for you.

 

Chris has said to me that is not necessary to change the stock fuel pump...and he have 3 times more big turbocharger installed and don´t have problem

[ April 15, 2003, 06:23 AM: Message edited by: Demonio ]

 

The stock pump is only capable of flowing about 200 Wheel HP worth of fuel at the stock 43-44 PSI. A new fuel pump should be about $100 US funds, (plus shipping costs to Chile), and would be a sound investment.

You don't state what size fuel injectors you are using, what fuel pressure you are running at.

You state you are using the "stock fuel management"??? If this means you are using the stock ECU with no other forum of Fuel enrichment, then yes, that would be your problem. You need to add some device that will compensate for the increased demand for fuel the turbocharger places on the engine. Just using larger Fuel injectors will cause you to run very very rich at idle/low rpm/off boost, and run very very lean at high rpm/high boost.

I would strongly urge you to look into at least a Apex-i S-AFC II or some similar device to control larger injectors and the fueling duties.

 

the size of injectors are 260-300 cc don´t have the exact size. The fuel pressure is 55 libras

 

the stock injectors for a 2.0L are 245cc

Are you using stock injectors or aftermarket injectors?

Can you translate that fuel pressure reading into Metric or English units?

 

Holy hell, my "know everything" converter doesn't even offer a Libra measurement. I've got pascals, atmospheres, torrs, dyne/cm^2, kg/cm^2, lb/in^2, etc...

 

Libras is Pound in spanish. smile.gif

 

i´m using stock injectors and 55 lbs of fuel pressure(lb)

 

I guessimate you making between 190-220 CRANK HP at 6600rpms.


To create that much HP. you need.

440cc injecotrs at 43psi fuel pressure.


My suggestion is. Run 440cc and raise fuel pressure. 1 pound to every 1 pound of boost.

giving you a total of 440@50psi.

This will give you enough fuel and some extar to run at 7psi

But MUST get a APexi SAFC or similar device to turn fuel pressure down at IDLE.