was it overboosting?

[Grey skys]

Went over to my cousins house the othe night for a few drinks and we ended up looking in my engin bay. He noticed that the boost controller was plumbed back on itself. Was my car overboosting, and if so wouldnt the turbo have shit itself from 18 months of overboosting

Cheers Jon

ps can someone tell me how to put photos in I have taken 2 to show what is going on

[Roy13]

It sounds like the waste gate is still connected to the plenum line, so in effect the solenoid carn't bleed off any eccess leving u with less boost if anything.

? for u getting a car from WA & want to register it in NSW are your compliance rules the same, do u have a australian compliance plate?

[Grey skys]

complianced and registered and I assume that compliancing is the same

I have got 2 pics but I dont know how to get them up

[Roy13]

Click reply (not quick reply) then go down to manage attachements, hint they have to be small or low in resolution so as the size doesn't excced i think 100kb's or something like that.

[JH32]

Compliancing would be the same for all states one would presume

You could perhaps have different licensing rules and reg over there though

[JH32]

Also grey sky, do you have a boost guage to check the boost levels?

[Grey skys]

before and after

[Grey skys]

before and after

after

[Grey skys]

When we changed the plumbing the turbo doesnt spool up as much, the car seems to have more grunt and the power comes on much harder and smoother.No I dont have a boost gauge because I thought that I was running stock boost soI didnt feel the need for one. Silly me:)

[Grey skys]

Can anyone help???

[Damo]

The way it was set up was ok. The boost solenoid (that was bypassed) allows the boost to jump from 5-7 psi above approx 4800 rpm. If it is set up the way it was u will not have the 2 stage boost. In otherwords u will get 7 psi from as low as 3000rpm. Its up to u how u set it up, I would go back to how it was.

[Grey skys]

Cheers Damo:)

[Roy13]

The way its set up in the before picture is no good as u thought as it will over boost but from memery the size of that tubing will only give u approximatly 14psi thats why it wasn't hitting the boost cut. the after picture is ok but will only give u 7 or 8psi like Damo said. If u ask me ur better off bleeding a bit off to give u 10psi. Won't give u the bottom end punch of 14 but will increase life of engine and turbo and give u almost the same top end if its a pre 95 model.

P.S. my quickest time of 13.8 was done on 10 psi :flamed:

[Grey skys]

My car has more punch and grunt with it in the after position. Hasnt series 1 skylines have a boost cut at 10psi?

[The Mafia]

the series 1 and 2 have boost cut at 12psi and more.

Without that little nissan boost controller colenoid connected you would only be running 5 psi.

The nissan one bleeds of a little, and runs the car at 7 psi after around the 4500rpm mark.