The "Official" 1HZ/1HD-T/1HD-FT Airbox/Intake Mod Thread (1 Viewer)

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1KZ question here guys, but I suspect it is very similar to your airbox setup. I recently added a generic Safari-style snorkel. I don't plan to go deep water driving with the vehicle (nothing deeper than headlights), so I was wondering it I should seal up the airbox drain valve (rubber valve at the bottom of the airbox).

Wouldn't the vehicle shut off once the alternator/fuel pump wiring/connectors etc are submerged long before the water reaches the level of the airbox?

Is the valve helpful if driving with a front-facing snorkel in the torrential rain that we sometimes get in Jamaica? I know the snorkel head is designed to separate off the majority of water, but I'm just wondering what would be my better bet.

What I can say though is the vehicle throttle is a lot more responsive with the snorkel, I assume because I am not almost always heat-soaked like I was before.
 
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Thought I’d post up the box I had made up for my 1HDT. 4” in & out. 4” to 3” elbow at my GTurbo. ~2006 Duramax cartridge filter.

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Overall it came out alright. A few things that I’d tweak slightly next time. I asked for Satin powder coat but got this shiny basterd instead. Lol. At least dirt won’t stick to it.
 

IanB

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That turbo-IC inlet pipe looks like it sits up very tall, how much clearance does the hood have?

Airbox turned out great, very tidy engine bay!
 
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That turbo-IC inlet pipe looks like it sits up very tall, how much clearance does the hood have?

Airbox turned out great, very tidy engine bay!
The AC normally sits right underneath that pipe. I’m sure PDI had a reason but I still think that pipe could have been routed better 😂. I know Mine on both sides of the engine bay hit the top liner of the hood
 
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Hood isn’t on yet. Lol. Neither is AC. Yeah, it’s a PDI intercooler. It used to snake around the stock air box pipe to the turbo that sits much higher.

Eventually I’ll replace that piece with something that fits better.
 
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That turbo-IC inlet pipe looks like it sits up very tall, how much clearance does the hood have?

Airbox turned out great, very tidy engine bay!

The AC normally sits right underneath that pipe. I’m sure PDI had a reason but I still think that pipe could have been routed better 😂. I know Mine on both sides of the engine bay hit the top liner of the hood

I know that I had that pipe backwards for a while and it made it sit higher. I realized my mistake, switched it around and it sits in better now.
 
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Little bit of cutting of the lid, a 90 degree 3.5” to 3” silicon joiner and from memory a 3” to 2.5” silicon reducer. You also need some 3” pipe (stainless or aluminium) to put between the two joiners. Plus obviously clamps...
 

IanB

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Little bit of cutting of the lid, a 90 degree 3.5” to 3” silicon joiner and from memory a 3” to 2.5” silicon reducer. You also need some 3” pipe (stainless or aluminium) to put between the two joiners. Plus obviously clamps...

Depending on your turbo, the 2nd reducer's specs may vary. Gturbo Grunter for example has a 2.75" inlet rather than 2.5" like stock turbo, and it's much nicer when that actually fits opposed to stretching it over and having it pop off while driving or something.
 

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