Hi,
I have a 1985 245ti and I have been wondering about a few things. The first question is is it normal for oil to be inside the air intake piping before and after the intercooler. The build up seems to be more on the side after the intercooler. Also there seems to be some gas in there too. I was wondering if it was evaporating from the intake manifold and depositing there. I also was wondering if the boost is electronically controlled. Could I use something like a high performance boost controller from TurboXS. Or does someone know how to increase the perfromance safely on a turbo?

I like to think I know a bit about turbo performance.

First make sure the engine/turbo is in good shape.

Is the turbo water cooled?

Switch to synthetics after going through the cleaning process (check out the amsoil website)

To increase boost, there are a few options

Boost controller like you suggested, But I can put you in contact with the guy who made my controller for half the price, and help support his race car. Its exactly the same controller (maybe not in the looks department)

You can increase it at the wastegate. Crawl under your car. Look up at the turbo. See that rod with a nut and threads? Well it pulls off the exhaust side. Loosen the nut, make the rod shorter to increase boost. .28PSI for ever full rotation unless your turbo is dying.

You have turbo plus system on your car. It allowes for 2psi extra above 3750rpm at full load. There is a solinoid that opens to allow this extra boost. Its mounted by your radiator over flow bottle. Just above it there is a relay. Look at your Wiring diagram, and you can jump it so the solinoid stays open. You will have the full 10psi boost all the time. I think you apply 12v to the tach signal port.

I personally suggest the boost controller route. QUicker spoolup time. Good stuff....

Clean out the hoses, and clean out the IC.

Mine are all dry, but thats because I don't have my PCV routed back to the turbo. Gotta get every ounce of octain rating in my car ;)

www.volvoeh.com/engineinstall.html

jordan@volvoeh.com

Jordan

Hi,

I have two 240 turbo cars and quite a lot of expertise with them. Sounds like you would like to increase the power of the car but have questions about how soound the whole thing is. I would suggest you make sure aren't about to make the mistake of trying to get maximum power out of a worn motor and turbo. You'll end up with a smoking heap of crap if you aren't careful. Do a compression check of the motor first. Change the oil and the air filter. Use 15w/50. Remove the intercooler and wash it out with hot water and a good degreaser. Remove the intake air hoses and wash the turbine with hot water. Reach into the turbo and wiggle the impeller. If it moves 1/4 inch, time for new turbo. Blow everthing dry before reassembly. Now you have a clean intake system, with an air filter that will pass plenty of air with causing excessive vacuum in the intake which can suck oil past the seals in the turbo. Run the car for 3000 miles, then open up the intake hoses. If they're soaked in oil, the turbo is worn. If the oil smells of gasoline, and the compression is down on two adjacent cylinders, the head gasket may be leaking. If the compression is good, the engine may be running rich and mixing fuel into the engine oil. Are there any other symptoms, big or small??? Does the motor smoke? If so, what color is the smoke? How many miles on it? What's the gas mileage? Does the turbo guage go into the yellow? Hope this is helpful.

The boost is controled by a pressure boost switch that can be adjusted. Turbo's do use oil the oil rings are not capable of sealing 100% and with time and heat they wear out. Gas in there too ? The odor of gas ? or liquid ?
--
john,,1985, 245:GLTi 246k mi..so.california

I'm really not sure, but go to turbobricks.com and they will know a lot more than folks here on this....good luck
nate gundy