i Got the idea from cspences build thread, like it so i went to the JY and found myself a set the z34 hood vents.

painted them black

started cutting away


letting some rtv dry

Finished

 

my buddy has one just like it on his na

 

Any noticible increase in airflow or drop in on the thermostat?

 

Your not really going to notice a drop in the thermostat, but after an autocross run you can see the heat pouring out of the vent. so the airflow is better.

 

My understanding was that putting a vent back there actually decreases the cooling efficiency of the cooling system. The vent should be put immediately behind the radiator so that air comes in through the front nose, through the rad, and then out. And no, there will be no drop in thermostat as our motors aren't exactly air cooled.

 

its almost directly overtop the turbo, so alot of the heat from it is expelled through there

 

Ok so you've made the ambient temperature above the turbo cooler. What about the warmer coolant and oil now going through the turbo? That's what is actually cooling it. Ambient temperature isn't doing crap.

 

my air filter is right near the turbo, and it would pull the hot air from the turbo. oil cooler is on the buy list. and its just oil cooled turbo.

 

Your turbo will super heat the air coming in, and that's why you install an intercooler. I would say cooling the air at the filter is unnecessary.

 

Makes perfect sense to me, although I believe it's a highly debated topic. Doesn't hurt to do some sort of CAI if you have the space, but does 5* cooler air equal 5* cooler air before going into the intercooler? Or does the turbo negate any difference?

 

It will help you to get the hot air out of there when you are stop. And it looks like a nice work done!

 

If that vent is under a high pressure area, no, no it won't. Your vent placement is border line. I'm not sure if that's considered high or low pressure. It's kind of on the edge. I would think the back of the vent is having air rammed in, but the front of it may be in a low pressure zone.