Where is your AIT sensor? I'm curious as to why you'd think flow back through the IC at idle would be a bad thing, if anything it's going to help lower the AITs.

 

About 185F

What is going on is the low pressure zone in front of the radiator (when the fans are on) is drawing air backwards through the IC (flow comes from above the IC and moves downwards). Thus warm air is drawn through the IC from INSIDE the hood area. It also makes the radiator cooling a little less efficient since cool air coming in through the nose is being mixed with a bit of the warm air flowing backwards through the IC. With the hood open, if I put my hand on top of the IC with the fans running, I can feel the air being drawn through the top of the IC.

This is only a problem though when stopped at idle, or I suppose at VERY slow speeds, like stop-and-go traffic. As soon as the car is moving steadily, the air in front of the radiator (and below the IC) is pressurized, the upward flow through the IC resumes, and the AITs drop fast.

Make sense?

 

Wouldn't that just be ambient air flowing through?

 

Nice work. Love the ABS Shroud! Very Quality Build!

Michael

 

I think I need to make a sketch, picture being worth a thousand words and all.

 

yeah maybe you do homey!

 

Homey don't play dat



OK here is the most awesome sketch I could muster in 10 minutes. Here is a side look at front of nose/engine area, car traveling right to left. The outline of car/hood/splitter is in green and forms the boxed-in area in front of the radiator/IC. IC is blue. Radiator is red. Engine is black. Airflow is dark arrows.

First image is what the flow looks like when the car is moving at speed and the area in front of the radiator is pressurized.

Second image is what the flow looks like when the car is sitting still and the fans are running.

 

i gotcha, i assumed a hole had been cut in the hood.

 

Not yet. Funny, I wondered if that is what you might have been thinking. I am still waiting for that GB extractor hood deal at CR. If it does not happen soon, I'll DIY a hood vent.

 

ZX, what happens at that magical point half way between your pictures where your flow across the IC is stagnated?

 

Good question. If I put fans on the IC, and wire them in parallel with the rad fans, then the second scenario never happens; if the rad fans come on, then the IC fans will be on too, and not backflow.

Plus, if I want to get really crazy, I could have the Adaptronic monitor the IAT, and if it gets above a certain temperature threshold, have it turn the fans on (Rad and IC). That way if the IC heats up from boost, or I am sitting at a light, either way it gets cooled off. It would just be another OR function. Just a matter of changing some settings in the Adaptronic. No need to add another sensor even. Easy.

 

your setup make me totaly appriciate my space....

 

^^ Nice. What are you going to do for a nose? Custom?

 

right now im still running stock peices, the fenders and bumpercover are bolted together. they slip on as one pc, and the hood is on pins, the plan was to dzus everthing, but the bumper is to flimsy, so when i get the autokonexion kit, thats all fiberglass, ill have the whole front end dzus to the car.

 

My miata is V-mount in similar.

 

You should introduce yourself at the "Meet and Greet" section. I like what you have going on.

 

I see.

 

A noob helping a noob......well thats new. Anyways cool setup nacci. Nice finish