Wastegate vacuum line question

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
jdmzipties
Posts: 4
Joined: Sat Dec 13, 2014 10:48 am
Car: Stock 2004 Forester Xt 4eat
Stage 5 1992 300zx Twin Turbo

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I've been searching for this on the forums, but haven't found exactly what i'm looking for. I had to pull my engine to rebuild my turbos a while ago, finally the engine is ready to go back in. Ive connected everything basically, but i have no idea where the vacuum lines from the wastegate actuators go. I have gt525 turbos ( i don't know if that changes anything) and Ive searched every where, and found nothing. The previous owner did a bunch of questionable stuff to the car, and i don't see any stock boost solenoids to connect them to, yet i don't have a boost controller. so where do they go? I heard they connect to something on the throttle body, pictures are much appreciated. Sorry if this isn't in the right place, i'm new here, but i really need your help.


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NolimitZ32
Posts: 7042
Joined: Fri Jun 27, 2008 9:07 am
Car: 91 AG2 2+0 TTMT swap/E39 BMW 540i6/E53 4.6is Dinan S3
Location: Houston, TX

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If you want to run them at static boost (non adjustable one set boost level) which will depend on the internal springs of your actuators then you can connect the vacuum line directly to any piece of air pipe between the turbo outlet and the throttle body. Doing this will make the car run one single set boost level (OEM actuators are 8psi IIRC) if you have upgraded actuators on your 525s than you may end up with somewhere around 12. For safety's sake if I were you I would get a decent boost gauge (factory unit in the dash is s***) and if you don't have the funds for a EBC then get a MBC FROM A REPUTABLE COMPANY, do not go cheap on the MBC, cheap ones cause boost spikes (hell even good ones do, just not as bad). All together a decent manual boost gauge and MBC should run you $100-150 and you will have the peace of mind of knowing and being in control of your preshurz


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