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Old 07-30-2008, 06:28 PM   #41
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The headlamp Naca duct feeds directly into the open air intake which is surrounded by a heat sheild. I'm sure there is some overall pressure increase but it can't be much.

Hustler,

I haven't done much for cooling. BEGI did the standard water reroute and I installed the GS group buy radiator. I'm fabbing up the splitter/undertray and will add slim fans in parallel. Temps were climbing at the end of the sessions. I don't think the single stock fan, which isn't sealed well against the rad, is enough. The lack of any undertray can't be helping as well as the exhaust leak at the turbo/downpipe connection from the loose bolts.
which radiator?
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Old 07-30-2008, 06:30 PM   #42
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The Godspeed big aluminum thing that's been a group buy forever.
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Old 07-30-2008, 06:41 PM   #43
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You know.. the ones that are on infinite back order.
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Old 07-30-2008, 06:44 PM   #44
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You know.. the ones that are on infinite back order.
The Chinese are making war on the US. A very slow, subtle and methodical one. First it will be no more radiators, the next wave could be intercoolers and badly made tools!
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Old 07-30-2008, 06:47 PM   #45
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oh - ok, isolated air box is cool. I'd be surprised if the fans solved any on track heat issues. At track speed the fan will only help if the oncoming is NOT being forced through the exchangers. Whether it's lacking of direction in the mouth or too many layers of obstruction (lack of exposure).
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Old 07-30-2008, 06:56 PM   #46
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oh - ok, isolated air box is cool. I'd be surprised if the fans solved any on track heat issues. At track speed the fan will only help if the oncoming is NOT being forced through the exchangers. Whether it's lacking of direction in the mouth or too many layers of obstruction (lack of exposure).
but you can spend $400 on fans from miata.net? That's $400 in performance that you can't get from resourcefulness.
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Old 07-30-2008, 07:24 PM   #47
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I'm hoping the undertray helps flow at speed. Also considering venting the hood but it's got to be subtle. The Mini vent looks OK still a little big for my taste. Maybe some fake Buick fender vents will help?!?
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Old 07-30-2008, 10:39 PM   #48
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My big *** 20amp fan works great in 98f ambient after a bunch of boost when I've been sitting at stop light. I can only hope it does as well once the a/c is charged and running. But if fans are bringing temps down at speed on a track, there must be an unidentified issue and a better (IMO proper) solution. I know they'd work in some slow turns... like 45mph max, but there's not too many of those on a single track.

Cue if you do all the proper stuff, like sealing up the mouth and running the undertray, then I'd say get a cheap used hood and put a vent in it. Just swap it out before the event and swap your street hood back on for DD duty. I'd considered the same thing for here in the South- winter and summer hoods.
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Old 07-30-2008, 11:08 PM   #49
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My God some of you people sound like bickering old women talking about what yarn is best for making a scarf.

I've used EBC on the street (forgot what compound) and they sucked. I've been using HP+ since with great results. From track days to mountain runs to auto-x... no problems. The only time I had one problem was on Talladega Grand Prix and doing time-attack style laps with a passenger and i got some fade. But it never happened again. I've also never been a fan of super shitty "cross drilled rotors". I'm sorry, but plenty of cars use plain old solid face rotors with no problem, so why would you want to decrease surface area? ***** retarded.

BTW, some of you guys should look into these. I have a pair of them and am just waiting to have the time to install them...

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Old 07-30-2008, 11:46 PM   #50
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Cueball take a peak at this thread for wiring the fans in parallel. I'm going to be doing it this weekend my self. http://forum.miata.net/vb/showthread...llel+fan+relay
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Old 07-31-2008, 09:07 AM   #51
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BTW, some of you guys should look into these. I have a pair of them and am just waiting to have the time to install them...

how much are those *******?
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Old 07-31-2008, 06:21 PM   #52
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i got a set from eBay that were BRAND NEW for like $60 shipped. IIRC the retail is north of $200

part # 000-03-5301

Here are the actual pieces...oddly enough, made by SpeedSource Engineering....

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Old 07-31-2008, 06:38 PM   #53
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http://iscracing.net/Miata_Brake_Diff.htm

Or get a set for $105 from ISC.
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Old 07-31-2008, 07:11 PM   #54
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John Doe- thanks for that link. Perfect. Just what I needed.

Doppelgangbanger- I am an old woman! What's wrong with that!

Thanks for the brake duct pics and links. Was going to fab something myself. I was thinking about using cardboard as a prototype like the undertray. Figured the flames wouldn't last too long but would look cool while they lasted.
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Old 07-31-2008, 07:15 PM   #55
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Doppdrifto I'm kinda amazed that the HP+ are not fading for you. I was able to fade thoes at the 160whp within 5 minutes of track abuse.
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Old 07-31-2008, 07:16 PM   #56
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I don't know about track, but I overheated both EBC green stuff (****) and HawkHP+ at the Gap.
The EBC's were ok for the street, but sucked at the Gap alltogether.
The Hawk's overheated the first go around, and just worked afterwards.
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Old 07-31-2008, 07:38 PM   #57
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maybe I can get some dryer ducting and just rivet that **** on?
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Old 07-31-2008, 08:26 PM   #58
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Ben/Zbac - I'm also running them on the 01+ sport brakes and using 17" wheels that allow for a LOT of ventilation/cooling. Yes, running a bigger wheel makes a difference as opposed to running a wheel that is close to the brakes and does not allow air to circulate around them. Trust me, i was driving 10/10ths at TGP...i don't have ABS and i might have had a bit of bite still available but i didn't want to risk flat spotting my slicks (i did lock the inside a couple times though).


Fagmuffin...errr... Hustler- dunno if i'd use dryer ducting as it's made to als insulate against giving off heat into a given area and is rather thick. What might be a good cheap product is that aluminium hose that is sold at most parts stores as "exhaust pre heating" hose for carb'ed cars.
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Old 07-31-2008, 08:28 PM   #59
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Quote:
Originally Posted by cueball1 View Post
John Doe- thanks for that link. Perfect. Just what I needed.

Doppelgangbanger- I am an old woman! What's wrong with that!

Thanks for the brake duct pics and links. Was going to fab something myself. I was thinking about using cardboard as a prototype like the undertray. Figured the flames wouldn't last too long but would look cool while they lasted.
If you want to McGyver some, i bet you can use the stock brake shields and get creative with a welder and some pipe.
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Old 07-31-2008, 09:17 PM   #60
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Weld? Pop rivet to the stock shields. That was my plan anyway!
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