can some with knowledge of turbos help me?

[waynos 0]

managed to get my engine in the car, see the gallery.

 

All is going smoothly but i need to know what to connect to the turbo

 

see pics

 

 

now i have 3 pipr outlets, onne on the bottom of the turbo, the one with the blue hose attached and one on the wastagate (seen just below the blue hose)

 

what connects to these?

 

i have this boost solenoid that came with the engine that i need to connect somewhere, im sure this connects to the turbo in some way but i dont know how.does anyone know?

 

[VEEDUBBED 0]

Need a bit more info. mate,what turbo?(looks like a Garret T25 or possibly T3?),the brass outlet from the compressor housing could be used for a turbo press. gauge.Your wastegate looks like 1 of my older conversions i did using a Garret T3/4 off a L.delta evo.1,1 nipple was connected the inlet side while the other nipple was used to operate the Pierburg overboost valve,like an Amal valve fitted to turboed cosworths.

Do you need that solonoid?,give me a bit more information and i'll try and help.

[waynos 0]

its a garret t25 turbo. the solenoid ,im led to believe is to control boost? in the turbo technics leaflet i got i states that i can have a high and low boost controlled by a solenoid and a toggle switch on the dash.

 

just pooped out to have a look and the wastgate has one outlet on it.

 

which outlets would i connect the solenoid to?also which one would the boost gauge go to?

[VEEDUBBED 0]

Normally the boost gauge can be fitted to any vacume source off the inlet manifold,that way you will see both positive boost and also vacume on overrun etc.If you fit the wastegate's rubber pipe onto the turbine housing you'll see possibly only positve boost on the car's gauge.

That solonoid is just a variation of the old Pierburg overboost bypass valve used on turboed deltas,cosworths,escort rs turbos etc,i noticed that you solonoid has a connection,were was it connected to?,do you have a seperate ecu supplied with the Turbotechnics original kit?.I don't see how your going to make it work without.

I remember that the T3/4 Ford escort cosworths and Evo-1 Lancia delta integrales

both had Weber/Iaw injection and the Pierburg valves were activated for 3-5 seconds by the car's ECU.

[waynos 0]

i do have a seperate ecu to control the fuelling and ignition etc.the solenoid is to be connected to a toggle switch and is liteerally either on or off...off being low boost and on being high.would this solenoid go between the wastgate and the turbo? and then would i have to block one of those outlets off?

 

as for the boost guage. i have a vacume feed ont the top right of the inlet manifold (think all 16vs do) can i use a tpiece to add the guage piping into that?

[VEEDUBBED 0]

That's right mate,connect the solonoid as you described,at most if you connect the solonoid

wrong it won't work,but be very carefull when testing the car that the turbo doesn't overboost.

The inlet manifold is ideal for the boost gauge's input.

By the way,what's that red dust inside the turbo's inlet?,don't let any muck or dust inside the turbine housing,blow it out using a compressor?.

[waynos 0]

all that crap has been cleaned out now. how will i know idf its overboosting? will the gauge give me some kind of indication?

 

which outlet on the turbo can i use to connect to the solenoid?

[VEEDUBBED 0]

It depends on how much the wastegate in the picture was set to.Normally the 'gate should open at around .7Bar(6-7 PSI?),once you've connected up the boost gauge and fitted back the solonoid(connect the solonoid inline with the wastgate,1 pipe to wastegate's barb and the other pipe to compressor housing's barb)don't connect the Pierburg's connector up yet,take the car for a test run on a bit of open quiet road and in third accelerate and see what boost is being produced,if more than the above mentioned boost is produced try loosening the actuator arm on the wastegate to decrease boost,if the boost is too low do the opposite to the arm.

You will know if the car is overboosting if you get a big surge in power,watch the gauge carefully(and the road..),initial boost would be set to around that figure then try again with the Pierburg valve connected.

If you keep overboosting the small Garret T25 you'll shag the shaft bearings in no time and,depending on fuel availability/press./flow,CR,piston strength,headgasket type etc you could either break the piston's ring lands or hole them,when your out testing the car be very carefull to listen for knock,pinging,pinking-all lethal to the pistons.

Let me know how you get on.