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Originally Posted by DOMINION
(Post 2055067)
What are talking about this thread is the stickyest of the ickyest!
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Originally Posted by shaunv74
(Post 2054782)
From Racing beats Water Cooling Tech tips:
"...Starting in 1993 the capacity of the stock cooling system was designed by Mazda to barely meet the needs of the stock car with no excess capacity for very demanding situations or modifications that increase the heat load on the engine. Based on a number of tests, we believe the primary cause of this problem is aerodynamic. In both the 1993-1995 RX-7 and RX-8, the air path out of the radiator is convoluted and restricted - leading to high water and oil temperatures. We have tried larger radiators, and to date, they have not helped. We have seen some improvement from improved sealing and directing the air into the radiator (using a spoiler lip under the vehicle) to create a lower pressure area under the car, to remove hot air." The point Racing Beat is making is that the problem with the cooling system is evacuation of air from the engine bay to allow for more airflow through the radiator. They looked at trying to move more air out under the car (which is relatively high pressure). This mod is moving more air out of the engine bay through the rear of hood. Ahh. If I understand this correctly. The hood is sealed and all the high pressure air under the car is sucking the hot air through the radiator only and not from anywhere else to help cooling. |
cant believe people are still talking about this!!! open the hood some air comes out!
olddragger |
Originally Posted by olddragger
(Post 2055500)
cant believe people are still talking about this!!! open the hood some air comes out!
olddragger Thats why I stated above "This thread should become a sticky":Eyecrazy: So maybe some of us can learn something.:) Yes I did read the whole thing!:banghead: BUT, BUT. Why then are ALL vehicles hoods sealed from front to back? I'm sure millions of $$$ could have been saved by not putting all that weatherstripping on.:rolleyes: I first started on the side of the hood vented side from my old school days. Afterward............:naughty: |
Most cars either don't have cooling issues or have better evacuation flow out the bottom or sides of the engine compartment. The reason this works is because Mazda didn't design the airflow out of the engine compartment adequately enough to begin with. If they had Rotorocks and MM wouldn't have had to come up with this. If the cooling air flow was better than most likely the engine compartment pressure would be lower and it wouldn't work. But the fact that it does is testament to the lack of air evacuation in the original design.
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What I find funny is that Mazda's 2001 RX-8 concept car had a beautiful vented hood. It was like somebody at Mazda understood the issue, but the fix never made it into final production.
I would strongly consider buying such a hood. Would anybody know of any company making such a hood? Note- The front opening made more sense too. Because on the concept car you would/could put the license plate below the opening. While on the production model the license plate blocks the opening unless you take it off, mount to the bottom, or have a folding license plate bracket. Also, the higher position may have meant a default designed cold air intake versus having to go to a 3rd party intake duct. https://www.rx8club.com/attachment.p...2&d=1151176012 |
Originally Posted by sosonic
(Post 2060158)
What I find funny is that Mazda's 2001 RX-8 concept car had a beautiful vented hood. It was like somebody at Mazda understood the issue, but the fix never made it into final production.
I would strongly consider buying such a hood. Would anybody know of any company making such a hood? Note- The front opening made more sense too. Because on the concept car you would/could put the license plate below the opening. While on the production model the license plate blocks the opening unless you take it off, mount to the bottom, or have a folding license plate bracket. Also, the higher position may have meant a default designed cold air intake versus having to go to a 3rd party intake duct. https://www.rx8club.com/attachment.p...2&d=1151176012 The opening on the production version is larger, no doubt. can we agree on that? It appears to have stretched downward taing out the surface area between it and the bottom opening - where you suggested a lic. plate could be mounted. Go take a look at the grill area on your car. only the bottom 1/8th or so of the grill is actually opened. The rest is molded completely closed. This looks to be about the same size area as the original opening from the concept picture that you posted. Now If you take the bumper off you will see why the opening was enlarged downward and why the top of the grill is not open. It would not be functional for airflow anyway because of the crashbar and foam padding back behind it. I don't live in a state that requires a front plate but I do live about 5 miles away from one that does. I have look at the possibility of ever needing to use that grill area to optimize my cooling, and I had a front plate I would mount my lic. plate under one of the headlights. Front plates look goofy anway so I don't think that would look any worse. |
I like that hood. Thats why I want the TS Seibon hood.
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I'm thinking that the KS hood along with the lower intake plate removed, will allow the hot radiator air to vent upwards and out the hood.
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Originally Posted by mysql101
(Post 2060595)
I'm thinking that the KS hood along with the lower intake plate removed, will allow the hot radiator air to vent upwards and out the hood.
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How about have 2 hood duct like GTR?
It will sure suck in more cold air. http://i288.photobucket.com/albums/l...gtrdet3160.jpg |
Originally Posted by rx8dorifto
(Post 2721003)
How about have 2 hood duct like GTR?
It will sure suck in more cold air. http://i288.photobucket.com/albums/l...gtrdet3160.jpg |
use this duct to get more cold air into the engine bay, then remove rubber lining at the end of the bonnet to let the hot air out...just an idea.
Originally Posted by dillsrotary
(Post 2721028)
Getting cold air in i do not believe is the problem, its getting the hot air out.
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Originally Posted by rx8dorifto
(Post 2725488)
use this duct to get more cold air into the engine bay, then remove rubber lining at the end of the bonnet to let the hot air out...just an idea.
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Originally Posted by mac11
(Post 2060686)
might as well toss in a small battery and/or relocate it to the trunk while you are at it.
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