When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Well, as everyone that has owned one of these cars, the heat under the hood can and does get crazy especially if you have hotter than stock engine built. I started a few years ago by grafting a L-88 corvette hood scoop on to my original composite hood and putting some screens in it to get some heat out but it still wasn't enough, so I kept searching trying to find some heat extracting vents that would look right and would fit where I wanted to install them at and finally found a set on ebay. The first set I found which were about the same size as those that installed were actually high dollar composite material but then I found these and they are abs black plastic that fit the bill perfectly for me so I ordered them, the composite ones were 308.00 and the abs plastic were 16.95, I definitely didn't want to spend 300.00 especially if was a failed experiment. So, today I finally got around to installing them and I think they look really good and will do the job nicely. I spent several days measuring and re-measuring to get the placement right given I already have a hood scoop and I didn't want mess up the paint. I masked everything off where I was going to be cutting and I used a variable speed jig saw with a fine tooth blade to keep things as smooth as possible and dressed the cut edges to keep everything smooth. Here's a few pics.
Thanks for the positive reply, I have been looking to find the right vents for some time now without getting into a great deal of expense and fabrication especially since the hood was already painted and pinstriped. I really like the look, and it will definitely help with getting some of the excess heat on those days when it is the 80's-90's and things get so heat soaked and that has been a real problem since the day I bought this car back in 1984. The black vents are a good accent with the blacked out headlight area as well as the T-tops since they look a near black. Placement was critical for these since I didn't want to cut into the hood structure itself. I will get some more pics of the car posted up since it's been a long time and much has changed.
Those vents do not look out of place at all. I like them.
And I totally agree with the underhood heat problem.
Firebirds and TransAms have it worse than Camaros.
I think they would look better, if painted white to match the car. They would blend in better, and less import looking. Import looking meaning... they paint everything they can get loose, a contrasting color.They don't look bad in black, but I think they would look much better in white.
I think they look very good but I really think maybe the same color as the hood would look better. They sort of look a lot like the Trans Am of the 1991-1992 age. But, the Trans Am was only dummy vents. I have a 1991 TA but I replaced the hood with a Ram Air hood. It helps a little but as said, we need as much cool air as we can get.
Looks good! Do you have the posting where you ordered from? I've been looking for something similar to use on my camaro hood. Do you have the dimensions?
Why do you have such an issue with heat build up? Are your headers ceramic coated? If not, it is a very worth while investment.
Yes, the headers are ceramic coated as well as wrapped. I tossed the idea around of painting the hood color but I personally like the black contrast with the white hood just like around the headlights is glossy black as well. I'm old school and I really don't like having everything one color, that's why my car still has the silver ground effects with the white. I happen to like the lettering and pin stripping that was painted on the car that is red to stand out and the triple color stripe from the factory between the white and silver. Just not a fan of one solid color on a car or truck. My truck is bright red with some black accents and some chrome I added to the mirrors and door handles to break up all the red, but that's because I'm and old guy who likes that stuff.
As for a link to where I bought them on ebay, type in Heat extractor hood vents in the search box and scroll through and you will find them, they really do fit nicely where I placed them and I didn't have to cut into any hood structure which is what I didn't want to do since I cut a good chunk out when I cut the hood for the scoop, the dimensions are something like 4 1/2"xlike 16" with a slight tapper to them. That's what I love about this hobby, you create or customize to your liking, not what everyone thinks. When I do go to any shows or cruises, I am almost always the only 3rd gen on the property and lots of people stop to look, talk, and take pics of the car which is cool since I did everything to this except the paint, I did the body work but paid someone else to paint it back in 1993.
You must have a setting that's not letting the pics I attached in the first post. There are 3 pics.
Yep! Something with Chrome or Android, because I see it now on my laptop. Looks awesome! Any chance you monitored intake air temps with a stock hood and then with the vents as you added them? I really like my stock IROC hood, but my IAT can get up to 170 or higher on high 80s days.
No, I never did that, but I can say during the summer temps of mid 80's-90's with humidity, the car just didn't like it at all. The terminator fuel injection needs some fine tuning which is not something I know how to do, it will take someone who understands this to handle that, wish I could though. I know just enough about this new tech to be dangerous and really screw things up. It will be interesting to see how this plays out next season when it's hot on well this helps extract some of the heat out. I personally like the look that it has now. I'm going to ask the guy who did the pin stripping to come up with something around the vents as well.
Thanks for the likes of vents and hood. When I decided to make this hood out of my original hood, I wanted to do something different and yet, functional, which I feel it will be a big help adding the extractor vents. I will have some red pin striping added this spring. Car is now prepped and covered for winter, sad, this summer went very fast and the weather didn't help, it was either blazing hot or lots of rain...
I demand more pictures of that car. I have a stinger hood and the back of it is like a cowl hood, similar to what you have. Your heat issue is that huge cowl in the back of your hood. I had the same issue, part of the solution was a cowl seal which I noticed that you have. The problem is the cabin air intake is in the cowl at the base of the windshield. All the engine heat rises up into that hood scoop and gets diverted into the cabin. You need to seal off the scoop from the engine air so it only let's cool air into the engine and keeps the hot air under the hood. I made a box out of aluminum and it did the trick. My car is AC delete under the hood and behind the dash. Cars like this have fresh air vents and the get their air from the cowl area. It was like having the heat on and totally changed after the aluminum box.
I demand more pictures of that car. I have a stinger hood and the back of it is like a cowl hood, similar to what you have. Your heat issue is that huge cowl in the back of your hood. I had the same issue, part of the solution was a cowl seal which I noticed that you have. The problem is the cabin air intake is in the cowl at the base of the windshield. All the engine heat rises up into that hood scoop and gets diverted into the cabin. You need to seal off the scoop from the engine air so it only let's cool air into the engine and keeps the hot air under the hood. I made a box out of aluminum and it did the trick. My car is AC delete under the hood and behind the dash. Cars like this have fresh air vents and the get their air from the cowl area. It was like having the heat on and totally changed after the aluminum box.
Here you go. Thanks and yes if I take the seal off, I get the heat and engine smells inside so taking the seal off is not an option. I'd like to see a pic of what you did to yours.
I have an ls so my setup is not going to help that much. Searching cowl induction or cold air induction in the fabrication forum will get you going in the right direction. Both of these cars have an ls and fresh air ducted through the hood.
Never had a issue with under hood heat.but I also have a 2 in cowl on the car.at track days or auto crossing the temp never reads above 180. ever try red line water wetter??
I don't battle over heating in the sense of water temps, rather air temps in the engine compartment from the lack air movement and getting hot air out from under hood. I can sit traffic on 90+ degree day and water temps stay at 190*. The hot air is the killer of horsepower in an engine and that's why those who run a power adder such turbo's or super chargers run intercoolers to lower inlet air temps, that's what I am trying to do with installing the vents, get as much heat out as possible so the EFI isn't ingesting super hot air from exhaust and engine. I have run 2+ inch cowl hoods for years but still lacked the ability to get the heat out from under the hood, water temps are not an issue for me. I will see how the vents work out next summer since I installed these when I parked the car for winter.
I have an ls so my setup is not going to help that much. Searching cowl induction or cold air induction in the fabrication forum will get you going in the right direction. Both of these cars have an ls and fresh air ducted through the hood.
What filter box is that on your Camaro I have a 4" cowl hood on mine with a LS mod going on and would like to use the cowl hood for intake air.
Pure easy, just a 4th gen SLP smooth air lid turned upside down and a K&N air filter, nothing exotic. Maybe a truck MAF would be a better choice I think they are bigger diameter.
I don't battle over heating in the sense of water temps, rather air temps in the engine compartment from the lack air movement and getting hot air out from under hood. I can sit traffic on 90+ degree day and water temps stay at 190*. The hot air is the killer of horsepower in an engine and that's why those who run a power adder such turbo's or super chargers run intercoolers to lower inlet air temps, that's what I am trying to do with installing the vents, get as much heat out as possible so the EFI isn't ingesting super hot air from exhaust and engine. I have run 2+ inch cowl hoods for years but still lacked the ability to get the heat out from under the hood, water temps are not an issue for me. I will see how the vents work out next summer since I installed these when I parked the car for winter.
I deal with some engines that have 1600*F tubes that I need to rest my hands on. The trick is insulation. Ceramic coat, and/or wrap the the exhaust plumbing, then install more insulation and/or shielding on top of that. Until you can't even tell the engines on, is possible.
Turbo engines we do this, need an EGT sensor because all the extra insulation increases overall exhaust gas temperature if everything remains equal. Those engines control EGT via water injection and alternative fuels though so it isn't an issue (30-50psi of boost pressure). However in your installation I wouldn't even worry about it because without the power adder you won't generate all the extra heat they do.
Pure easy, just a 4th gen SLP smooth air lid turned upside down and a K&N air filter, nothing exotic. Maybe a truck MAF would be a better choice I think they are bigger diameter.
So hey there Mr. cc 82Z-28. Did your car have air conditioning at one time? Do you have fresh air vent controls under your steering wheel? Do you have the plastic flap air lip thing that scrapes on everything mounted to the bottom of the radiator core support?
So hey there Mr. cc 82Z-28. Did your car have air conditioning at one time? Do you have fresh air vent controls under your steering wheel? Do you have the plastic flap air lip thing that scrapes on everything mounted to the bottom of the radiator core support?
Yes it did have ac and I took it out and replaced the ac box with just a heater box to me some more room on the passenger side of the engine ,but I left the controls in place should the next owner would to put it back in someday. I don't have any vents under my steering wheel, and yes I learned very early on to keep that air dam on to help keep air up and into the radiator. Since I have owned this car since 1984, I have learned by trial and error, what will work and what won't when it comes to keeping radiator cool and other things. I will admit that at times I wished I had the ac, but when it's that hot out, I don't have any desire to be out in it anyway and wait for the sun to go down before going out.
That is every bit of your heat problem, the mismatched HVAC components. Before I figured out my heat issue it was horrible. I have long tube headers and cats clamped to them. They generate a good amount of heat. Being in a vehicle without ac is one thing, the malfunctioning HVAC with added engine heat magnifies the issue 10 times. Having the proper fresh air intake to the cabin is going to help a lot. Sealing the engine compartment from the cabin air intake will make things way better. The fresh air intake vents draw air from the cowl and your hood sends all the hot engine air into the cowl. Get the proper components for behind the dash for a non ac car or go back and reinstall the ac.
That is every bit of your heat problem, the mismatched HVAC components. Before I figured out my heat issue it was horrible. I have long tube headers and cats clamped to them. They generate a good amount of heat. Being in a vehicle without ac is one thing, the malfunctioning HVAC with added engine heat magnifies the issue 10 times. Having the proper fresh air intake to the cabin is going to help a lot. Sealing the engine compartment from the cabin air intake will make things way better. The fresh air intake vents draw air from the cowl and your hood sends all the hot engine air into the cowl. Get the proper components for behind the dash for a non ac car or go back and reinstall the ac.
I can't "see" the difference by your explanation. Got any diagrams for reference?
I plan to do nearly the same as cc 82Z-28 and many other members have also done the same.
I can't "see" the difference by your explanation. Got any diagrams for reference?
I plan to do nearly the same as cc 82Z-28 and many other members have also done the same.
At one time I had an ac delete 84 Z. It ended up with tpi and shorty headers. It was just like a car without ac, but it was never ever unbearable. I removed the ac system from my current car along with all the other comfort and convenience options in an effort to reduce weight, including the jute padding. I now have the mentioned cowl type hood, long tube headers, cats clamped to them and true dual exhaust, I also got rid of the console, I retained the very front of it holding the radio, hvac controls, and the little vents. That is two pipes running under my transmission tunnel that no longer has the console and jute/insulation. On hot days my trans tunnel from the shifter forward to the firewall was like being close to a bonfire. For every inch closer you got, the temperature would increase significantly. Because I swapped out the ac for a complete delete system I know everything behind the dash is different. I do not know how the ac system feeds fresh air into the cabin, heater only cars get the fresh air vent pull controls under the steering wheel. My old car was never uncomfortable so something was not right. After reviewing the possibilities it just had to be the hot engine air coming up out of the bulge going into the cowl then into the cabin. I installed a cowl seal and made the aluminum box to block the hot air and only allow cool air into the engine. Problem solved, it is now like my old car and not unbearable on hot days.
The passenger side fresh air vent that is not on ac equipped cars and the cat location. I have to admit the hot air is still under the hood, but I no longer feel it and the engine gets fresh air.
OK, I see your point. I attributed the hot passenger side floor to the catalytic converter alone.
I had a non-A/C 80 Monza that had the cable pull kick panel fresh air vents. I added a sunroof.
It was better than A/C as long as the car was moving because the air would run all the way up my body from my ankles to my head and out the sunroof.
I really miss that.
OK, I see your point. I attributed the hot passenger side floor to the catalytic converter alone.
I had a non-A/C 80 Monza that had the cable pull kick panel fresh air vents. I added a sunroof.
It was better than A/C as long as the car was moving because the air would run all the way up my body from my ankles to my head and out the sunroof.
I really miss that.
Good to hear that a non ac car really wasn't that bad. Now just imagine those vents pumping out engine compartment heat. 100% undesirable and uncomfortable.
Well, it's been 2 years since I added the hood vents and I thought I would resurrect my old post with current pics of my next vent added to my hood. It's made for the 2014-15 Camaro and it was the perfect size for where I wanted to mount it and I think it came out pretty well. It will be interesting to see how it works when we finally get to have shows and cruises again. I also took the time to add the timing to the Holley Terminator system and that made a huge difference and it runs so much better now.
that's beautiful and looks very functional,makes me wish my cowl hood didn't have the crest up the middle as it makes it far more difficult to integrate anything like this cleanly and so aesthetically pleasing.anyone with suggestions,let me know.i apologize in advance for any perceived hijack,it wasn't intended.
would like to also add extractors.i may have to make them myself from aluminum .
could you show pics of your cowl seal ,how you did it and how you did your air box,please.i have the unbearable heat issue as well and this was also an a/c car without ac currently.thanks very much.
I actually don't have any air box, I use a 3" tall 14" diameter air filter assembly that has the filter top as well and this new vent sits right above the filter element which is what I was after. I use a drop base filter assembly with plenty of clearance . I still use the original GM cowl seal that came with the car. It seals the hood great at the cowl, so between the cowl at the base of the windshield and now this vent, it will definitely help the heat under the hood. I appreciate the comments and I personally like the black of the vents, it goes with the black around the headlight buckets. If you look at the first pics of the original post you will see what my setup is like under the hood, nothing has changed under hood.
Looks very good! I like it! ...thanks for the update. ....just out of curiosity, with regard to high and low pressure when the car is moving....do these vents suck air IN, or pull air OUT? I've thought the same things about many different hood set ups over the years. -and my point for asking is do you actually know? I have the functional IROC louvers and many people have many different set ups, some for cold air IN, some for hot air out. I've always wondered if they actually function how we HOPE they do!
It's been my understanding that the air at the base of the windshield draws air in and if you have a cowl hood that has a vent at the back it will draw in. As for the vents on top of the hood, these primarily extract heat from the engine compartment and especially when you are moving and the air coming through the radiator is pushed into the engine compartment and will be drawn out through those vents. When you look at the new camaros that have those vents on the top, their air is still being drawn in through air coming in around say the right or left side of the fender where air is being channeled in from the front of the car. I could be wrong but that's how I understand the workings of how the air is being brought in and out of the engine bay. Thanks for compliment of the look, I really like the way it came out and come next summer, we'll see how it works.
10-29-2018, 11:43 AM
