just got my new engine in and running 2.5 t+
was told to run a pipe from turbo to actuatar to give about 0.6 bar of boost but its still running full boost any one know how to turn it down

 

i think you can adjust the actuatar by a bolt to change the length of the rod, if you have the boost pipe from the actuator to the turbo, this is the only thing that will increase the boost, im not sure what way it has to go, but at a guess, make the rod shorter

 

ok ill try that thanks

 

What I think you mean is to bypass the boost control and to just run actuator pressure.

This is done by simply running a piece of vacuum pipe from the small nipple of the compressor housing direct to the actuator itself. Normally this is tee'd off to the boost controller with a small restrictor inside it this allowing the control solenoid to control boost.

By just running a simple pipe from the nipple to the actuator the actuator will open at circa 0.6 bar.

Thus you'l only be capable of running 0.6 bar no need to adjust the actuator

Hope that helps

 

thats what ive done but its still running full boost

 

If you've piped directly from the turbo pressure outlet to the wastegate, then you will only ever acheive actuator spring pressure. - Different actuators will have different cracking pressures.

What turbo and actuator are you using?

If you connect a mityvac directly to the actuator you can see exactly what pressure it cracks at.

If you are hitting spring pressure and then see the boost continue to rise with rpm, then that's a different issue

 

if your going to adjust the rod mate you have to make it longer, making it shorter will increase the boost, this is what most of the boys with rs's do when they are increasing boost, they cut a small amount of the thread off and shorten the rod thus giving higher boost.

 

the turbo is a md321t+

 

If you're getting full boost, what sort of throttle and RPM are you using to run the engine in?

 

keeping it under 4000 boost should be 0.6 dident think it would of gone over that but it dose only done 2 mile so far

 

Your MD will probably have a stronger actuator than 0.6 Bar

 

must have. engine builder said it would only make 0.6 he will of fitted a of mds