Nissan 200SX Club - South Africa

Ya it is possible to up the boost by bending the actuator arm, but it could be your guage aswell, it could be both, you could actually boost .9 or 1 bar and not know it or obviosly .65 and the guage reads too high.

the best is to borrow a proper guage like VDO or Greddy or something from a tuner, connect it and see what it really boosts, or ask them to do it on the dina...

Ok. I'll check if i can get a good gauge somewheres.

The other thing I forgot to mention, it could be your exhaust housing thats cracked, even if your actuator arm is not bent and working properly air might escape the housing causing a higher boost level, get the guage and start from there....

Draco wrote:Ya it is possible to up the boost by bending the actuator arm, but it could be your guage aswell, it could be both, you could actually boost .9 or 1 bar and not know it or obviosly .65 and the guage reads too high.

the best is to borrow a proper guage like VDO or Greddy or something from a tuner, connect it and see what it really boosts, or ask them to do it on the dina...

I agree, that is most likely whats happening.

Ok. Well for my sake i hope its just the gauge and not the exhaust housing.

the best is to borrow a proper guage like VDO or Greddy or something from a tuner

Well I have 3 boost gauges and all read different. The Wolf and the GReddy are close but the Zeitronix is about 0.05Bar out from the other too on boost and about 0.1Bar out on vacuum. Now the Zeitronix pressure sensor is a military grade sensor (used in tanks) so I tend to think it is the accurate one, but then why are the other two out??

Gary57 wrote:
Now the Zeitronix pressure sensor is a military grade sensor (used in tanks) so I tend to think it is the accurate one, but then why are the other two out??

Nice. Well is there a way to test it using some sort of tool?

That is worrying, this means you might pay R1000 for a good guage and still not have an accurate reading.....whel I suppose .1 bar out is better that .3 or so out...I guess...

Nice. Well is there a way to test it using some sort of tool?

Ja but the tool will also have some form of a gauge so I am back to now having 4 boost gauges that read differently .

It doesnt really matter though, as long as they all stay below 1Bar Im happy.

That is worrying, this means you might pay R1000 for a good guage and still not have an accurate reading

All these gauges are more than R3000. The sensor alone on the Zeitronix was R850, its a big heavy duty thing that is why I tend to believe it more.

Ja thats true. Well ja. i was just afraid that my Sx was boosting to high. but i dont mind.

The profec B boos controller has a fuzzy logic boost gauge, the more advanced Greddy Eletronic uses a sensor, the 60mm gause is a mechnaical gauge.

The most accurate of them all is the Profec, the electronic and SMT range are 2nd and 3rd is the 60mm mechanical gauge, the diff between the 3 is about 0.05bar

Ja it is only about 0.05Bar out on the pressure side but about 0.1 - 0.15 Bar out on vacuum. I am comparing it to the Zeitronix military grade sensor (again it could be wrong aswell).