Turbo - fuel controller options

[Zrun]

Just wondering, in a custom turbo setup, what are the fuel controller options...

 

I know about "fuel management unit" which adds a straight line graph fuel pressure based on PSI tapped from turbo, however someone said that this is very bad for the car, as the air/fuel mixture is not mapped out, and might cause piston to burn out in the long run.

 

What are the programmable fuel controller options for a turbo?

 

Is there a fuel controller that can be programmed based on 3 variables, intake air temperature, rpm and boost psi?

[Saaber]

Using a programmable ECU with upgraded MAP sensor will do the trick...

[Zrun]

That is very drastic action leh.... ..

 

I was thinking of some intercepting device near the fuel feed tubes. I realized that most custom turbo makers do not disclose the fuel systems they implemented, unless it is a cheapo FMU(fuel management unit).

 

BTW, what is the MAP sensor (Manifold Absolute Pressure).. Is the MAP sensor the same as Mass Airflow Sensor? Where is it located, if it is not mass airflow sensor(on the intake tube)?

 

Why do I need to upgrade MAP? So that it can sense high pressure more accurately?

 

Also, someone tried to install Apexi PowerFC on my car and failed.. I think this is too much work/money for me..

Edited September 29, 2003 by Zrun

[Saaber]

It is because the stock MAP (Manifold Absolute Pressure) sensor cannot register more than a little slightly more than atmosphere pressure...so you will need an upgraded one to register the higher air pressure...

[Cloverleaf]

are you running extra injectors?

[Zrun]

No. not planning to add extra injectors.

 

Just trying to figure out the best turbo option for my car.

 

I need a simple, safe and efficient fuel management system. Optimally, there should be a tuneable map, so that I can let someone dyno tune it for me.

[Cloverleaf]

the safest and simplest you can get is to use piggyback ECU, no other short cut.

[Slowpoke]

Sports Compact Car magazine turbocharged a Toyota Matrix last year. Perhaps you should go dig up those past issues where they described how they did it (I think Jan '02 and July '02 might be useful) I assume you are turbocharging the 2ZZ-GE engine on the Matrix.

[Zrun]

Just 1ZZ-GE... 2ZZ has very high compression ratio, like 11:1, and they only run around 7psi, and the engine was broken after that..

[Throttleb]

Step 1: Look into the possibility of adding injectors, uprating your fuel

pump as a first step to prevent detonation.

 

Also with high compression engines, LPT with a small turbo

is the safest bet with it spooling in abt 2000/2500 rpm

 

I worked on step 1 in my last car but chickened out of the actual

Turbo install after I found out the guy was NOT running a ECU

to change to air /fuel telling me that for LPT, stock ECU can adjust.

However, just by extra fuel pump and boost valve, i was able to get better throttle response..

[Zrun]

What is LPT?

 

How does it work to add injector? Put it somewhere in throttle body?

 

I think increasing fuel pressure is not the best way because you are just squeezing more fuel thru the same fuel delivery time.

I guess programmable piggy back is the best solution, because you can increase the delivery time.

[E36UDM]

Light Pressure Turbo

[Throttleb]

actually the fuel pressure regulator does the squeezing , the

fuel pump just maintains enough fuel pressure as and when its needed.

U can change to larger injectors too along the current fuel rail.