what is the normal boost for the g charger?

[task 0]

can someone please tell me what is the normal boost pressure for the g60 , and where do you exactly measure it from, I had it measured yesterday but I suspect the guy did something wrong , he took the hose from the intake mani to the fuel pressure regulator and connected the boost pressure meter to the intake and it was giving less than 2 bar on 6000 rpm, :shock:.

thanks.

[Supercharged 2]

Yep, it will be less than 2bar (thats 28PSI!!) - you won't get 1 bar from a standard charger with standard pully - around 11 PSI is about right I think...

 

You can also take a reading from the MFA in diagnostic mode but not sure what the unit of measurements are...

[task 0]

so the way he measured it is right? I would use the MFA but the thing doesnt read anything except trip miles right. :cry:

[Polo Classic 0]

What did the gauge read? Absolute pressure or boost? 2 bar absolute is 1 bar boost

 

A standard charger should give 0,65 bar boost on the standard 78 mm pulley

 

at the bottom of the page here is a guide on how to use the MFA to read boost http://www.snstuning.com/DIY/Tips/tips.htm

[stevemac 0]

How to test your boost levels - UK spec cars

 

1. Start Engine

 

2. Move the MFA selector to "2"

 

3. Press and hold the MFA end button (keep holding)

 

4. Stop engine

 

5. Start engine

 

6. Release the MFA end button.

 

7. Press the MFA End button one time.

 

 

You should now see 450-800 readings fluctuating with idle. Anything higher than 800 is not right (vacuum leak). Much less than 450 is probably too much timing advance.

 

Go run your car!!! 3rd and 4th gear to REDLINE. Carefully note the highest #'s you've got.

 

A pullied charger should not make less than 11.6psi, and even so, thats weak. A Stock charger should make ~~11psi in perfect shape!

 

EURO Hg(#'s of boost/vacuum) Comments

200 -23.7

400 -17.8

600 -11.9

800 -5.9

1000 0 (Atmosphere- ala no boost, charger is bypassed)

1200 2.9 psi (Your charger is dead or big boost leak)

1400 5.8 psi (Your charger is about dead or big boost leak)

1600 8.7 psi (Your charger needs new apex strips or big boost leak)

1800 11.6 psi (Great for stock pulley, Probably needs new apex strips if 68mm pulley)

2000 14.5 psi (Great for 68mm pulley on stock charger)

2200 17.4 psi (Great for 68mm pulley on heavily ported charger, hold on to your ass fast!!) :rambo:

 

2000 and up folks need to be careful with fueling, as the programming maps end at about 2000 on the ecu :) Dynotuning, and air/fuel/egt gauge, and custom chip recommended

[stevemac 0]

For G60 Corrado’s the extra MFA functions are:

 

MFA switch, position 1:

1: Engine map code.

2: Country code.

3: Speedo drive ratio.

4: Upper RPM limiter.

5: Lower RPM limiter.

6: Deceleration fuel shutof pressure.

7: Segment test.

 

MFA switch, position2:

1: Test sum of programmed bytes

2: Intake manifold vacuum/pressure. (Boost as per conversion table)

3: Engine RPM.

4: Momentary fuel consumption.

5: Signal from speed sensor.

6: Oil temp.

7: Ambient temp.

[Dennis.be 0]

Don't use the MFA, this wil not give you the correct boostpressure, use a Turboboost gauge.

A normal charger should give you a pressure of 0.7bar with the standard pully.

 

I've got a 68mm pully (& custom RS chip) and this brings the pressure on 1.1bar at 5800rpm.

This give's you an idea that is imposible to get 2 bar out of an standard charger, even with a tuned charger.