996 Turbo Actuator pressures, what should they be?

[rgracin]

Hi

I'm currently refreshing all my turbo hardware (long story of which I'll go into more detail when it's finally done).

I need to set the turbo waste gate actuators, but can't seem to find what the pressures need to be set to for a standard turbo set up. I have the choice of standard or Forge ones and I believe they need to be set to different pressures?

I have access to a a Mtyvac so can do it properly whilst they are off the car.

Can anyone point me in the right direction where I can find the required pressures?

Thanks

R

[Rockster]

All I have is this:

Checking and adjusting the bypass flap control boxes on the turbocharger

Check and adjust ( cylinder bank 1-3 )

Test
1) Raise vehicle at the prescribed jacking points.
2) fasten special tool dial gauge holder VW 387 onto the underneath of the camshaft housing (cylinder bank 1-3). Flanges with the thread M8 have been provided for this procedure.
3) Align tracer pin with push rod, set the dial gauge with pre-tension to 0.
4) Connect special tool pressure gauge 9103/2. Connect hand pump and pressure gauge together with branch pieces. Hang pressure gauge on stabilizer.
5) remove vacuum hoses from control box.
-Push a small screw driver between the connection nipple and vacuum hose.
-Widen vacuum hose a little and spray in e. g. silicon spray at the same time.
-Pull off vacuum hose.

6) Connect connecting piece (shop made) and Tecalan line (shop made) onto the control box and connect with the pressure gauge3.
7) Produce overpressure of 0.5 bar with special tool tester 9160/1. Read off pressure on special tool pressure gauge 9103/2. Have second person read off the stroke of the push rod on the dial gauge at the same time.
-Prescribed stroke: 4 +/- 0.5mm

Adjusting
1) Remove safety bracket.
2) Twist adjusting nut accordingly.
-Turning clockwise -- stroke smaller.
-Turning counter-clockwise -- stroke larger.
3) Fit safety bracket again.

Check and adjust ( cylinder bank 4-6 )

1) Fasten special dial gauge holder VW 387 onto the underneath of the right camshaft housing.
2) Make tracer pin (shop-made). The tracer pin must be bent accordingly in the area of the deflector plate.
3) Carry out checking and adjusting using the same method used on cylinder bank 1 - 3.

[Nineexcellence]

6.5psi - you can go to 7psi if you are not hitting your boost targets. Note - some aftermarket actuators require different pressures depending on make.

[Rockster]

Looked through my references again and I can't find anything on setting the actuator pressures.

[rgracin]

Nineexcellence said:

6.5psi - you can go to 7psi if you are not hitting your boost targets. Note - some aftermarket actuators require different pressures depending on make.

Excellent, thank you.

What would you reccomend I fit? The standard ones or the Forge?

[Nineexcellence]

rgracin said:

Excellent, thank you.

What would you reccomend I fit? The standard ones or the Forge?

we like some forged products especially the dvs. On standard car we prefer the standard actuators, they don't require as much cracking pressure as the forged ones. If you drop me a PM we can supply standard ones direct from the manufacturer at considerably less than Porsche charge.

[Crimp a Length!]

Nineexcellence said:

rgracin said:

Excellent, thank you.

What would you reccomend I fit? The standard ones or the Forge?

we like some forged products especially the dvs. On standard car we prefer the standard actuators, they don't require as much cracking pressure as the forged ones. If you drop me a PM we can supply standard ones direct from the manufacturer at considerably less than Porsche charge.

Ken i have the Forge actuators on mine and DV's (i think)with a map and an exhaust & 997 GT2 intercoolers circa 500+ ponies.
It was boosting around 1.3bar but have seen a big drop to 0.8, booked in at RPM in Knaresborough next week for a service and to check it out, any ideas what it could be??

[Nineexcellence]

Crimp a Length! said:

Nineexcellence said:

rgracin said:

Excellent, thank you.

What would you reccomend I fit? The standard ones or the Forge?

we like some forged products especially the dvs. On standard car we prefer the standard actuators, they don't require as much cracking pressure as the forged ones. If you drop me a PM we can supply standard ones direct from the manufacturer at considerably less than Porsche charge.

Ken i have the Forge actuators on mine and DV's (i think)with a map and an exhaust & 997 GT2 intercoolers circa 500+ ponies.
It was boosting around 1.3bar but have seen a big drop to 0.8, booked in at RPM in Knaresborough next week for a service and to check it out, any ideas what it could be??

if you are hearing rushing noise from either side then probably turbo to intercooler - this is the most common problem . Without knowing what springs are in the actuators, it could be that you are only running wastegate e.g. 1 bar actuators are normally in the industry 0.8 - depends on whether the cracking pressures have been set to 1 bar or 0.8 bar. One of the dv not working can give the same result.
Boost test should reveal all Ed.

Ken

[Crimp a Length!]

Nineexcellence said:

Crimp a Length! said:

Nineexcellence said:

rgracin said:

Excellent, thank you.

What would you reccomend I fit? The standard ones or the Forge?

we like some forged products especially the dvs. On standard car we prefer the standard actuators, they don't require as much cracking pressure as the forged ones. If you drop me a PM we can supply standard ones direct from the manufacturer at considerably less than Porsche charge.

Ken i have the Forge actuators on mine and DV's (i think)with a map and an exhaust & 997 GT2 intercoolers circa 500+ ponies.
It was boosting around 1.3bar but have seen a big drop to 0.8, booked in at RPM in Knaresborough next week for a service and to check it out, any ideas what it could be??

if you are hearing rushing noise from either side then probably turbo to intercooler - this is the most common problem . Without knowing what springs are in the actuators, it could be that you are only running wastegate e.g. 1 bar actuators are normally in the industry 0.8 - depends on whether the cracking pressures have been set to 1 bar or 0.8 bar. One of the dv not working can give the same result.
Boost test should reveal all Ed.

Ken

Cheers Ken they are uprated springs that i know its in the history. See what they come up with mate.