I have done some searching, but cannot find anything on how the heat exits the engine bay.

I added Z06 screens and my temps have dropped about 6 degrees on coolant temp, no effect on oil or tranny temps. But none were expected.

In my area it has been 98-104F for the last Month and will be that way until the 1st of October...

Just wondering how the heat exits the engine bay?

Thanks,

Dan

 

Don't know but I'm sure there is so kind of flow pattern.

I usually, when it's major hot in summer, put fans on in the garage and the hood up when I pull in to park and the temps are at operating range. Since the lamp takes too long to cycle off, with the hood open Chevy made it real convenient the location of the quick disconnect on the passenger side of the air intake housing. So I disconnect and let the hot air escape and be exhausted by the fans which in turn doesn't just sit there and cook all the hoses and wire harness. Some people might thnks its a bit extreme, bit I don't mind doing it.

 

I'm not certain if the original question pertains to when the car is being driven or after wards.

After driving, I also open the hood during the summer months to prevent the engine compartment components from becoming a heat sink. My wife also does it to her daily driver.

We're in AZ and weather now averages from 105 to 118+ degrees in the summer months. I've seen hundreds of cars break down with heat related issues over the years on AZ highways. None of ours have.

Whether our procedure helps or not, I don't know. But, they're ours...

 

Bottom line, it doesn't release heat....well, in a way it does, out the bottom, fighting convention, and ruining the aerodynamics by filling the space behind the airdam with pressurized air.. There is no natural airflow or convection outlet above the cooling system or engine, which is why when the racing C5s were developed, the first thing done was a hood with air outlets. Some aftermarket hoods address the release of hot air, but most are just cosmetic or offer a bubble for clearance of a supercharger install, which in itself increases heat even more.

Here is an example of one of the many that DO allow release of heat, when finished out.

This hood by C5 West, is designed to be fitted to a street car, and has places for slots all over it, a large central cluster for radiator air, and on each side for header heat. You have to cut the slots yourself as part of the finishing process, as it is usually shipped as a continuous surface top. It also has all the underside bracing formed and bonded. There are of course other offerings from other companies....BUT beware, just because a hood is after-market, and may even have clearance for a supercharger, it does not necessarily have improved heat loss/ventilation compared to the stock sealed hood......check and THINK before you buy!

 

Heat in fact is released through the side vents (Gills), whether or not it's adequate I don't know. I removed the Driver's side inner Gill shield and cut off about two inchs of the rear hood seal on the Driver's side as well. I get a lot of heat rolling out of those areas...

I forget were I read about that little trick...

 

If you do the modification, as you have, you can get some airflow out the sides....ANYTHING helps!

 

I did this trick, as well! I don t know how to know if it helped..or how much it did help, but i did it because i do believe it sounds effective.

 

A little of the air goes out the side vents and the rest has to fight its way out under the car. One of the reasons I went to a well vented hood. Other reason is by letting the air out the hood you take away the lift of the air compressed under the front end at speed giving a more stable ride at triple digit figures.

 

Left fender vent

 

That's where it's supposed to go....if take everything apart you can see it's a straight shot along the frame from the font and out that driver's side fender vent.

Vents are functional (or are supposed to be)

 

With the hood down, the engine bay is pretty much closed off except for under the engine and what little can come out of the side vents and around the headlights. I solved this by installing a Motor City Mold vented hood.

 

the extractor hood serves two purposes: 1- remove heat, 2- added downforce with the a 2" or 4" front splitter

 

I am referring to while he car is being driven. I also have removed the hood seal, is there a downside to doing this?

I also pop the hood and leave it up in the garage.

I looked for the vents, as per a post on this thread and I did see a spot for heat to get out the bottom, but heat rises, so I am not sure that helps as much as vents could force out the side. There appears to be great location next to the Z06 brake vents, but those are also out the bottom and at driving speed, they could exhaust hot air via force.

Thanks for the responses. Keep them coming!

 

Hood seal keeps all the dirt and grit out of the engine compartment, as well as water.

I have mine sealed sides and front, used a side piece from GM for the front so it looks factory.

 

I have the entire seal, the one in the back by the windshield in my garage, are you saying to just modify it?

I took it out because I thought it would provide the super heated air an escape route???

Dan

 

There is a strip running down each side of the hood on the fender lip. I just bought one side piece and cut it to fit the front. It attaches to the side of the lip rather than the bottom as some after market seals do. That way it acts as a flap type seal.

Well I'm sure Chevy engineers had all this in mind when they designed it. They put seals on the sides for a reason. I'm not sure why they left the front open, but my vehicle is a daily driver now going on 9 years old and the engine bay is as clean as it was brand new. I blow any light debris out every couple months with compressed air. I have two friends at work C5 and C6 both do not have front seals and their engine compartments look horrible.

 

I have a CAI and for vacuum and heat purposes I cut about a 2 inch section off of the rubber trim below the windshield cowl. I also added Water Wetter to my coolant..My temps stabilize at about 205-206 in the summer (FL).

 

Pure stock and I run 196-199 summer FL temps. I noticed the other day I also have some debris buildup between the radiator and condensor. Now trying to figure out how to remove it as the space inbetween is very tight. Need a very thin long rectangular shaped vacuum hose tool! On the C4 there was more room between the two components and a 1/2" PVC pipe worked great.

 

How does heat exit the engine bay...through the engine air filter and out the tail pipe. I would imagine that a large volume of air makes it way out this way and the remaining hot air bubbles around and is exhausted through the side ports only when you park.

rr

 

I am working with the same issue, Florida is just brutal heat considering couple options including hood vents but not sure...