Miata cooling system thread
07-15-2014, 07:52 PM
#64
We're playing with electric water pumps on a couple of cars. Previous experiments weren't that promising, but the newest generation looks good. We have not changed the flow of the water. One of the coolest things is that it can run in closed loop with no thermostat. In fact, it appears the ND has a clutched water pump from the factory.
Miata owners can be...difficult. If we can avoid cutting support structure, that's preferred. Besides, if an efficient vent can be designed that doesn't require any cuts to the support structure, where's the harm?
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07-16-2014, 12:36 AM
#67
Source of the NA/NB hood pressure maps
As someone who is close to cutting holes in a MSM hood...I am interested. More details please. Will it have a lip to increase extraction efficiency? More and bigger hole than the Subie vent? Seriously, depending on timeline I may buy a set from you. I have to do something before Miatas@Hallett or I'll spend half of Friday running cool down laps.
As someone who is close to cutting holes in a MSM hood...I am interested. More details please. Will it have a lip to increase extraction efficiency? More and bigger hole than the Subie vent? Seriously, depending on timeline I may buy a set from you. I have to do something before Miatas@Hallett or I'll spend half of Friday running cool down laps.
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07-16-2014, 12:50 AM
#68
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Here's a snapshot of the AutoCAD file.. this is for the NA hood
Up until just a little while ago, I was running a hood in which I had these three holes cut out which matched the gaps in the supports below, always loved the look. Made this to fit the same idea.
I took a look at my NB today, looks like I can do something similar on that hood as well. Shapes are a little different but similar layout.
I have a different part coming out of the waterjetter end of this week, so I might have them cut a prototype of this at the same time so I can fuss around with it.
-Ryan
Up until just a little while ago, I was running a hood in which I had these three holes cut out which matched the gaps in the supports below, always loved the look. Made this to fit the same idea.
As someone who is close to cutting holes in a MSM hood...I am interested. More details please. Will it have a lip to increase extraction efficiency? More and bigger hole than the Subie vent? Seriously, depending on timeline I may buy a set from you. I have to do something before Miatas@Hallett or I'll spend half of Friday running cool down laps.
I have a different part coming out of the waterjetter end of this week, so I might have them cut a prototype of this at the same time so I can fuss around with it.
-Ryan
Last edited by ThePass; 07-17-2014 at 06:06 PM.
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07-16-2014, 01:21 AM
#69
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I took a look at my NB today, looks like I can do something similar on that hood as well. Shapes are a little different but similar layout.
I have a different part coming out of the waterjetter end of this week, so I might have them cut a prototype of this at the same time so I can fuss around with it.
-Ryan
I have a different part coming out of the waterjetter end of this week, so I might have them cut a prototype of this at the same time so I can fuss around with it.
-Ryan
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07-16-2014, 08:51 AM
#70
These NA pressures make sixshooter's dual subie extractors look superior to any centered-hood-hole-behind-the-radiator. I don't believe the numbers I used showed such a large difference L-R.
Given your car is both track and daily driven, I'd think you've got the best case. The OE cooler/warmer is get your oil up to temp on DD and the external cooler is doing it's job for any elevated temps.
I would have thought if the oil temp was 235 and the water temp was 200 the factory oil sandwich plate would make some positive contribution to oil cooling during operation. But using an external cooler is, of course optimal. I'm currently using both which is probably not necessary....
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07-16-2014, 08:56 AM
#71
I know I did the center vent and tried to get over to the lower pressure, but I did it assuming that the pressure in the engine bay would still be higher than ambient, and that my 1" long "spoiler" on the leading edge would also decrease pressure behind it. It certainly works. When my coolant overflow (poland springs) bottle gets coolant in it, its sucked right out and onto the windshield.
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07-16-2014, 10:11 AM
#72
Agreed- and the center location probably does lapse into the negative areas. And the center location is documented to work many times here and elsewhere (I did the same with cooper scoop). I was just surprised to see the pressure difference across the front of the hood in that area.
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07-16-2014, 10:35 AM
#73
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Awesome thread Emilio. I look forward to your oil cooler thread too.
Excellent find on the subaru vents sixshooter! That seems ideal. I may have gone that route.
I've come across these very pretty pictures that I used in picking my hood vent and oil cooler location along the NA centerline, but nothing beats real world testing with a gauge of some sort.
cfd | Hancha Blog
Excellent find on the subaru vents sixshooter! That seems ideal. I may have gone that route.
I've come across these very pretty pictures that I used in picking my hood vent and oil cooler location along the NA centerline, but nothing beats real world testing with a gauge of some sort.
cfd | Hancha Blog
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07-16-2014, 01:35 PM
#76
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I only have (positive) experience with the Pierburg CWA200. I stuck mine in my bumper, but these are small enough to fit almost anywhere. Here is a guy who makes a controller and has it on his miata:
Tecomotive
Every now and then I find the pump on ebay for cheap. Most standalones or an Arduino can be set up to control it if you didn't want to buy the finished controller above.
Tecomotive
Every now and then I find the pump on ebay for cheap. Most standalones or an Arduino can be set up to control it if you didn't want to buy the finished controller above.
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07-17-2014, 10:40 AM
#77
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Here's a snapshot of the AutoCAD file.. this is for the NA hood
Up until just a little while ago, I was running a hood in which I had these three holes cut out which matched the gaps in the supports below, always loved the look. Made this to fit the same idea.
I took a look at my NB today, looks like I can do something similar on that hood as well. Shapes are a little different but similar layout.
I have a different part coming out of the waterjetter end of this week, so I might have them cut a prototype of this at the same time so I can fuss around with it.
-Ryan
Up until just a little while ago, I was running a hood in which I had these three holes cut out which matched the gaps in the supports below, always loved the look. Made this to fit the same idea.
I took a look at my NB today, looks like I can do something similar on that hood as well. Shapes are a little different but similar layout.
I have a different part coming out of the waterjetter end of this week, so I might have them cut a prototype of this at the same time so I can fuss around with it.
-Ryan
Shane
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07-24-2014, 10:20 PM
#78
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This is a question for an oil cooler thread. that we're drafting.
I think you mean the oil warmer. That giblet does nothing to reduce oil temps. Not a single track car in our shop has one. We typically use a Mocal thermostat sandwich plate and generic Chinese temp sender plate (Glow-shift, Greddy, etc)) stacked. TB coolant lines always capped off.
I think you mean the oil warmer. That giblet does nothing to reduce oil temps. Not a single track car in our shop has one. We typically use a Mocal thermostat sandwich plate and generic Chinese temp sender plate (Glow-shift, Greddy, etc)) stacked. TB coolant lines always capped off.
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