MBC and T28(garrett m24 a/r.48)

[EH@B]

hii guyz
long time ...
again im facing the same problem in the past
controling my boost

this pic of the turbo

this the way i tried

 

[EH@B]

bump!

 

[Sheldon]

you dont have a port on the turbo?

usualy its from the turbo to the small 3 point one ftom the other end of the small 3 pont one to the actuator and the last port into the MBC and one end of the MBC venting..

 

[Sheldon]

like this.

yours could be fine but i never tried like that!

 

[EH@B]

yea i think that in the pic will work with me
waiting for more replies

 

[finx]

vacuum for the wastegate actuator control must be taken from before the throttle body. doesnt matter where, you can just drill a hole in a convenient place in the intercooler piping and thread a fitting into it for get one welded on. closer to the turbo compressor the better though.
running off the inlet manifold will cause all sorts of spiking issues

 

[Sheldon]

vacuum for the wastegate actuator control must be taken from before the throttle body. doesnt matter where, you can just drill a hole in a convenient place in the intercooler piping and thread a fitting into it for get one welded on. closer to the turbo compressor the better though.
running off the inlet manifold will cause all sorts of spiking issues

so doing it in the turbo would be the best option.

 

[finx]

yup
on the compressor housing outlet or just after on the inter cooler piping is ideal

 

[EH@B]

i was thinking to do that before
but i said should be way to sort it as its OEM turbo in nissan engines but i think as u said maybe its connected to intercooler pipes

thnx for helping
i will try to do that as soon as possible

 

[EH@B]

i finished it today
i made port in the elbow which connected to turbo

before :

and now :

 

[morpheus]

neat job mate...boost sorted now?

 

[Sheldon]

perfect. hows boost doing?

 

[EH@B]

test is tonight
i didnt test it yet... becuz the sun killed me ...... very hot

 

[EH@B]

guyz the boost is not bad but still high
and i closed the MBC and didnt do sence !!!!! any idea
wht about T peice if i turn it to other way will do something ??

 

[jabran200]

EH@B, I am not upto date with your problem but are you saying boost is too high?

You can not lower the boost less then what the internal wastegate is set to.

If it is adjustable then extend it as much as you can (you must leave at least 2 threads on it).

If its a fixed arm then you won't be able to lower less than 12psi i think it is on 200sx turbos.

 

[EH@B]

EH@B, I am not upto date with your problem but are you saying boost is too high?

You can not lower the boost less then what the internal wastegate is set to.

If it is adjustable then extend it as much as you can (you must leave at least 2 threads on it).

If its a fixed arm then you won't be able to lower less than 12psi i think it is on 200sx turbos.

mate my boost is so high i dont wht boost exactly but its more than 1.3 bar
and i dont want to lose my engine , i cant reduce :S and the arm is not adjustable!!! , about the turbo its from twin turbo zx300 engine.
i want to set it @ 0.8bar , but icant !!

 

[jabran200]

stock for the 300zx is 9.5psi.

Have you confirmed that the actuator is good? It may be that it is not opening?

 

[EH@B]

stock for the 300zx is 9.5psi.

Have you confirmed that the actuator is good? It may be that it is not opening?

i dono really about actucater. + i dont knw how to cheak it ?!

 

[finx]

if you suck on the vac hose intake on the actuator and then put your tongue over the end without letting air in, it should create a vacuum suction and stick to your tongue. if not then its toast (dead).

 

[EH@B]

if you suck on the vac hose intake on the actuator and then put your tongue over the end without letting air in, it should create a vacuum suction and stick to your tongue. if not then its toast (dead).

i cheaked it and its fine
so wht to do now