DRKSYDE

iTrader: (1)

OK so we all know that our under hood temps are really high... Don't have exact numbers but its warm.

Soo without major aerodynamic fabrication how to get cool outside air into the engine bay and then out with the hot air??

Has anyone thought about electric exhaust fans? I have two thoughts...

If the car has a new vented hood then place the exhaust fans directly below the new vents once the hood is closed.

The other option if you have a stock non vented hood... would be to place an exhaust fan on either side of the engine bay with a limited amount of piping throught the inner fender well and out of the fender vents.

Now I am no engineer and these are just a couple of quick ideas I thought might work. Anyone have any thoughts or insight?

KJ238

I think the natural flow of the air would take the hot air out of the engine if you have a vented hood. DOn't think you would require a fan

Alternatively, driving without a hood also works.. hehe

DRKSYDE

iTrader: (1)

You would think so but I think it would help with the fans even more. LOL Without a hood yes... just make sure all the plastic engine pieces are off!

Clavius

I'm still surprised with the notority that the 8 and Rotory's have in general of being heat monsters that radiator companies havent jumped on board for development of a larger or more efficient one.

I seen a DIY for brake cooling vents the same idea or method I think could be led into the engine bay for additional cooling??

Zero_Rotary

these are what i can think of that might reduce the heat:

oil coolers
high capacity radiator
mazsport's early fan kick off relays&sensor.
fan controllers
vented hood
low temp thermostat
engine oil viscosity

Jax_RX8

I would not add a hood vent as you already have functional side vents (shine a flashlight through the holes on the back corners of the engine bay and look into the vents).

I would consider the Mazsport fan controller as it runs the radiator fans much more agressively to keep the engine (and engine bay) much cooler. Check out this link for details:

https://www.rx8club.com/showthread.p...5&page=1&pp=40

Moonrover333

another cheaper option is raising the back of the hood by adding a spacer inbetween bolts and brackets


i like it personally

Trekk

I cut the vents bigger behind the oil cooler to allow the air to flow a little more easy. Might not do anything, but its was worth a shot and took a good 2-3min to do.

DRKSYDE

iTrader: (1)

These are all good suggestions.

I was just trying to see if anyone thought a couple more electric fans would assist in cooling even more on top of these sort of things.

ddub

And if you do it with just spacers/washers if you get in a head on collision the hood will be pushed through the windshield and you run the risk of serious bodily injury.

Skiptomylue

Then just dont get into a head on collision.. lol

Moonrover333

well goddamn it was an idea, use grade 10.9 bolts than i don;t know do it somehow. never done it.

yiksing

A vented hood only works wonder if the car is moving sufficiently fast, removing the rubber where the hood and the windshield meets would be a good way to remove.

Trekk

The weird thing is, when you lift the hood like that the air is suppose to go in, not come out.
Positive pressure or something, NASCAR guys have been doing it for a longtime, you just dont see it on a NASCAR cause its cut down in under the hood. Not sure why car companies never add this.

Jax_RX8

Not a good idea to remove the rear hood seal to let air out of the back of the hood.

If you are traveling at speed, there is inward pressure here from the hood/windshield angle and the air will push into the engine bay and out the bottom.

But, if you are going slow or not moving at all (not creating any pressure), heat and any engine vapors will escape from here and will and be be picked up by the interior air pickup located in that same spot - affecting the air coming into the cabin. That is why passenger cars never vent out the back of the hood - this is where the interior air pickup is and the pressure is used to feed air into the car instead of the engine.

NASCAR racecars take engine air from here rather than using it for interior feeding.