Radiator Hood Vent
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Not saying any of the setups I've seen on here don't work great, I just want to find the setup that makes the most logical sense in my head from a drag vs. cooling balance. The only reason I've not considered top mount intercoolers is the height of the mass but really an IC and piping isn't that much weight and I'm guessing ThePass lost that weight in cutting the rad support up there
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https://www.miataturbo.net/general-m...airflow-37262/
his intercooler was angled down in front of the radiator, with its own ducting/mouth gathering airflow directly through it, with the radiator getting its own clean air as well.
He had better pics somewhere else that I can't find.
thesnowboarder copied the setup:
his intercooler was angled down in front of the radiator, with its own ducting/mouth gathering airflow directly through it, with the radiator getting its own clean air as well.
He had better pics somewhere else that I can't find.
thesnowboarder copied the setup:
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Junior Member
Joined: Jun 2013
Posts: 122
Total Cats: -10
From: Raleigh, NC
https://www.miataturbo.net/general-m...airflow-37262/
his intercooler was angled down in front of the radiator, with its own ducting/mouth gathering airflow directly through it, with the radiator getting its own clean air as well.
He had better pics somewhere else that I can't find.
thesnowboarder copied the setup:
his intercooler was angled down in front of the radiator, with its own ducting/mouth gathering airflow directly through it, with the radiator getting its own clean air as well.
He had better pics somewhere else that I can't find.
thesnowboarder copied the setup:
I like that routing since you don't have to do significant fabrication to reposition the radiator
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I think that whenever Theseus (Savington's car) rises again, the cooling stystem will be much improved over that old setup. That also only worked for a baby-size intercooler, which he moved on from later.
One massive benefit of the V-mount is significantly shorter piping to/from the intercooler (better throttle response as well as few potential failure points w/ less couplers/clamps), which isn't at all achieved with a low-mounted intercooler.
-Ryan
One massive benefit of the V-mount is significantly shorter piping to/from the intercooler (better throttle response as well as few potential failure points w/ less couplers/clamps), which isn't at all achieved with a low-mounted intercooler.
-Ryan
Last edited by ThePass; Apr 23, 2014 at 01:47 AM.
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Just occurred to me this is a big hijack of OP's thread, sorry about that.
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Joined: May 2013
Posts: 9
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https://www.miataturbo.net/general-m...airflow-37262/
his intercooler was angled down in front of the radiator, with its own ducting/mouth gathering airflow directly through it, with the radiator getting its own clean air as well.
He had better pics somewhere else that I can't find.
thesnowboarder copied the setup:
his intercooler was angled down in front of the radiator, with its own ducting/mouth gathering airflow directly through it, with the radiator getting its own clean air as well.
He had better pics somewhere else that I can't find.
thesnowboarder copied the setup:
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Finished the intercooler hood vent today:
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Thanks. I have a manual bending brake which I made some alterations to so it could do radiuses instead of just sharp bends, but it only gets the bend half-way close, the duct is essentially hand-formed.
Didn't take a pic from that angle, but I can today.
The duct will look less out of place when I do the vinyl wrap in the next couple weeks.
I might add a couple fins/louvers to the vent today. Have been going back and forth about it in my head..
-Ryan
The duct will look less out of place when I do the vinyl wrap in the next couple weeks.
I might add a couple fins/louvers to the vent today. Have been going back and forth about it in my head..
-Ryan
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Not that our opinion matters that much, but cut up a couple pieces of cardboard and place them where you're thinking of putting the louvers. Actually that sounds like it might be a little hard.
I think it looks great as it. Especially how you added a hump to the front to help create that low pressure zone. I think this looks as nice as the one that guy with the GSX made, if not nicer. And I thought he did an awesome job.
I think it looks great as it. Especially how you added a hump to the front to help create that low pressure zone. I think this looks as nice as the one that guy with the GSX made, if not nicer. And I thought he did an awesome job.
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Right, because cutting up cardboard is a lot more difficult than cutting and shaping alumiunum 
But there are enough pics floating around from that illustrate what I'm considering:
C7 ZO6
C6R
My thinking is that this helps make flow out of the vent linear, and perhaps also keeps the air as it passes over the vent from tumbling down behind the front edge and obstructing the outward flow from the vent.
But, then there are cases against needing these from the same boys:
Which leads me to thinking that the more sealed, smoother, more controlled the path from heat exchanger out is, the less those louvers are needed. I think I'm seeing a trend that the more turbulent and unmanaged the air is below the vent, then louvres are used - i.e. above wheel wells or on a hood where there isn't perfect ducting up to it. But then I don't think they could hurt, and might help a bit.. many racecars just go with a big hole with a really good duct.
-Ryan
But there are enough pics floating around from that illustrate what I'm considering:
C7 ZO6
C6R
My thinking is that this helps make flow out of the vent linear, and perhaps also keeps the air as it passes over the vent from tumbling down behind the front edge and obstructing the outward flow from the vent.
But, then there are cases against needing these from the same boys:
Which leads me to thinking that the more sealed, smoother, more controlled the path from heat exchanger out is, the less those louvers are needed. I think I'm seeing a trend that the more turbulent and unmanaged the air is below the vent, then louvres are used - i.e. above wheel wells or on a hood where there isn't perfect ducting up to it. But then I don't think they could hurt, and might help a bit.. many racecars just go with a big hole with a really good duct.
-Ryan
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I see what you mean, and I agree with what you're saying. I also heard that the louvered were there to help "smooth" the transition from where it was going, to the higher pressure, faster moving areas of the hood surface.
I think what you've made so far definitely looks good enough and fits into the scheme of what that 3rd vett has and what that awesome looking BMW car was running.
I think what you've made so far definitely looks good enough and fits into the scheme of what that 3rd vett has and what that awesome looking BMW car was running.
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That IC duct is balleur.
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Thread Starter
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Joined: Oct 2011
Posts: 646
Total Cats: 62
From: The Race Track & St Pete FL
Ive been looking around on the internet and found some people making a hood vent for their radiator. Then using a front diffuser behind the splitter to supply air to the intercooler and vents the intercooler air into the engine bay/down the trani tunnel (above the flat underbody).
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That's a pretty cool idea. Packaging may be tough though.
Street tuning commenced today. 7-mount works almost too well, might remove one of the fans because I don't think I'll ever need two. And IAT's were 5-6* above ambient during highway pulls. Win.
-Ryan
Street tuning commenced today. 7-mount works almost too well, might remove one of the fans because I don't think I'll ever need two. And IAT's were 5-6* above ambient during highway pulls. Win.
-Ryan
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Thread Starter
Senior Member
Joined: Oct 2011
Posts: 646
Total Cats: 62
From: The Race Track & St Pete FL
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put your fans on a manual switch. You shouldn't need them on unless you're in the grid sitting anyway.
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