soviet

iTrader: (10)

My temps at highway speed are 175F, which is below my thermostat opening temp. I have a gigantic trackspeed radiator. Fan turn on is 200F which I only reach in hot temps while sitting at intersections for like 5 minutes.

because it rapes your idle when it turns on. don't get me wrong, it cools really well, but in my case (no A/C) I could get away with a 12" easily.

you were right. here's another question, then - ACL race bearings alternative - Page 2 - Miata Turbo Forum - Turbo Kitten is watching you test compression.

evank

iTrader: (2)

UPS says my new fans will arrive tomorrow afternoon.

I emailed CXRacing for this question; perhaps the MT community will know better -- what size of machine bolts do I need to buy to fit into the OEM radiator mounting holes -- assuming (I know...) that OEM-compatible aluminum radiators do, in fact, use the same size holes?

concealer404

iTrader: (3)

Probably M6x1.0 because every small-ish bolt on the Miata is that size.

(I really don't know for sure, but i feel about 90% good about that answer.)

JasonC SBB

This article shows that the 16" 1999 BMW X5 fan is very strong:

AutoSpeed - Chasing Overheating - Again!

Leafy

iTrader: (1)

Another fan option guys are the silicone intakes ones. They are NOT mishimoto copies. I'm not sure what they're copying but they're thicker, have different fan blades, and draw more amps. I've had a problem though, the mounting zip tie thingys dont like it when you pull 1.5g. I need to find a new mount kit or make brackets to have them bolt onto the stock points on the radiator.

concealer404

iTrader: (3)

Those mounting zip tie things are ******* garbage. They also don't like rough running truck motors making gonzo power. They end up eventually sawing through radiators.

JasonC SBB

Impossible.

Leafy

iTrader: (1)

He is on E85.

concealer404

iTrader: (3)

I'm still not buying it. Unless his calibration is off.

Leafy

iTrader: (1)

Yeah, I know mine fluctuates between the thermo open and closed temps when at speed and between the fan on and fan off when just parked.

soviet

iTrader: (10)

Calibration could be off. Its a 180* thermostat - I looked at it 3 days ago.

As I understand, at 175* the thermostat is already partially open and allows just enough flow through the radiator to maintain an equilibrium.

edit: Nevermind, that's incorrect. 180* is the opening temperature, so it should, theoretically, be completely shut until then.

Savington

iTrader: (31)

There's always a little flow through it.

krissetsfire

iTrader: (1)

I am currently rocking the ebay radiator. I mounted OEM fan in the middle without any shroud and have had 0 cooling issues. I'm also in Arizona and have seen stop in go through the city in 100+ temps.

I'm debating what to do because I don't currently use my A/C but will be after I get my ms3 stuff from DIY. Is anyone running 1 oem fan with a/c? I have an NA and need to make an undertray and probably a shroud.

Anyone think a shrouded OEM fan would be adequate w/ a/c. Obviously 1 OEM fan without shroud or undertray works fine. I don't notice any temp changes on highway either. 190 all day. thermostat temp.

TurboTim

iTrader: (9)

Where does one get tech info on spal fans? spalusa.com is useless.

midpack

iTrader: (3)

No guarantees the information is actually correct, it lists different CFM than speedwaymotors.com for #30102042.

A1 Electric Online Catalog -- Spal Cooling Fans and Accessories

Mazduh

I'm considering cutting my stock msm fans from the plastic shrouding and making them fit to my mishimoto shrouding. I easily see way hotter temps then I should running a mishimoto intercooler, radiator, and fans. I experimented with some corrugated plastic and blocking off everything like the oem shroud. I saw maybe 1* temp difference. This also could be due to my shitty ducting job though. LOL! Has anyone found any SPAL fans that might fit the mishimoto shroud?

evank

iTrader: (2)

You are correct. I bought that size today and they fit perfectly.

concealer404

iTrader: (3)

The smaller SPAL fans that FM uses are the right size, but wrong bolt pattern. Pretty easy to drill some holes and bolt it all together, though.


I swear to god i'll get you those measurements today or tomorrow man. Been busy. We'll get to the bottom of this.