Was bored, and I found an old remote thermometer, so I went out to perform my own little test. Outside temp was 73 according to the Z's thermometer. Weather channel says 71. Remote thermometer said 76.

My setup is the Nismo V2 bumper with intake duct, and JWT Popcharger with heat shield. I'll be doing this test again with the stock airbox reinstalled to compare temp drops relative to outside temps, etc again.

The test was done while driving 3 miles at a constant 55 mph, then I snapped a pic of the lowest temperature displayed each time.





Here's the general intake path in case anyone doesn't know.




Mounted the thermometer piece on the plastic in front of filter.
For the first test, I plugged the intake duct with two towels.






Drove the car for a couple miles to get everything up to normal operating temperature. Let it idle for about 5 minutes. Reached up to 110f, then the temps only climbed very slowly.



Result of the first test: V2 intake duct plugged.


Result of the second test: V2 intake duct open.

 

Good stuff and thanks for the test.

 

so it is good for a 4-5 degree difference. Don't think thats going to give you any horsepower....good test.

 

I know a lot of people were wondering if the intake duct actually helped, so I figured I'd do my part and give my results.

 

i was thinking of doin something like this in a few days. I have access to a snap-on modus scanner, and using the cars IAT sensor stock and with some type of ducting added. Most likely home depot racing.

 

I think the general rule of thumb is every 7 degree drop in IAT results in 1whp. Could be wrong, but I know I have heard that in the past.

 

I'd like to borrow a diagnostic tool that reads IAT like jiggy mentioned and do this test again with the duct open/covered and with the popcharger/stock air box.

I'll look into borrowing the tool from the local Auto Value and seeing what I can come up with in the next couple weeks.

 

If I had a duct lying around I would run the test (cipher logs ftw), but alas I don't . I'm interested in the results though. The duct is just one of those things you can't look back once you hack up the front bumper.

 

You have the stock bumper? If you want, one of these days I could take my V2 off and see how the Nismo intake duct would/could fit with the stock bumper.

This might help a lot of people out who want the extra airflow but don't want to hack up their front bumpers.

 

Yea....stock bumper. That would be great.

 

some1 should do this with the titek air duct

 

or get a cold air intake and the air is literally colder than an intercooler

 

Just went outside and swapped bumpers quick.

It's a no-go for the V2 intake duct and stock bumper. The intake duct doesn't hang quite low enough to take full advantage of it, and the stock grill needs to be trimmed. However, trimming the intake duct itself can make it work with the stock bumper no problem.

 

spork, you actually do drive a Z and do something other than post *****!!!

 

I do!!

 

I have a nismo v2 but I dont have the air duct. I also have cipher so I can data log this. Where can I buy a air duct?

 

Thanks for the effort.

 

https://my350z.com/forum/intake/4134...take-duct.html

 

These readings are taken in a static setting? The car is not moving?

 

In for results on stock airbox. Nice work S-PORK!