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VG30DETT IAT Sensor Location


aDEADkoala

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Hello;

I'm looking into getting a G4X N300X for my twin turbo Nissan 300zx and am trying to plan ahead.

 

I understand that the desired location for an IAT sensor is before the throttle body, which on a boosted application would be on the charge pipe after the intercooler. The problem is that this car basically has 2 separate intake tracts and 2 throttle bodies. The intake manifold also largely separates the cylinder banks, save for the balance tube at the rear. Of note, there is an unused port on the passenger side of the intake manifold which has the same thread pitch as common IAT sensors (go figure).

 

What's the best solution for mounting the IAT sensor? Just on one charge pipe? Just on one side of the intake manifold (and deal with heat soak)? Before the turbos and intercoolers where the factory MAF was (starts from one air filter, then separates)? Or somewhere in another joined location like the balance tube? 2 sensors (if possible)?

 

Probably worrying too much. Maybe my tuner will have a preference when it's ready. Any advice is appreciated! A stock setup for reference:

1200x900_silicon_intake_0308.webp

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  • 2 months later...

I often drill and tap the throttle body if I dont have any other good spot.  Obviously in a location where the blade opens away from the sensor, and best somewhere near the shaft if there is room.  If you have similar piping to the pic above then the hard pipe further forward would also be a suitable spot. 

wFlnhSZ.png

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  • 1 month later...
On 6/6/2024 at 5:51 PM, Adamw said:

I often drill and tap the throttle body if I dont have any other good spot.  Obviously in a location where the blade opens away from the sensor, and best somewhere near the shaft if there is room.  If you have similar piping to the pic above then the hard pipe further forward would also be a suitable spot. 

wFlnhSZ.png

So one is fine then? I have all hard-piping but can work with that... maybe I was worried too much then. I was also considering how the 350Zs are set up, which have dual MAFs for each side. Thank you!

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