Normal behaviour for stock radiator when tuned

[AKKO]

There was a relevant autospeed article kicking about...
http://www.autospeed.com/cms/article.html?&title=Undertrays-Spoiler-Bonnet-Vents-Part-2&A=2160

Minimal benefit while stationary since its all about forcing air through the core, atleast whilst the fans arent running to draw air through anyway but thats stating the obvious i know. ;-)

 

[Kaldek]

Yeah thermo not fully open until 95 degrees as i understand...

Really? That explains a lot.

 

[AKKO]

Yeah but your fans should be going before then right?

 

[Kaldek]

Yeah but your fans should be going before then right?

Hard to say as the AC always kicks in one of the fans regardless of engine temp. I've never heard the main fan kick in.

In the driveway, the winner radiator and thermostat were able to keep the car at the normal operating temperature even for sustained periods, without the main fan coming on. Mind you I can't recall if I've ever idled the car without the AC on, so there would have always been some airflow due to the AC fan.

 

[naughtika]

both fans should kick in when you turn your a/c on

also bigger rad = more fluid.. which also mean you need faster way of cooling it down.. that's what I found anyway..

stock radiator fans may be enough to cool down the thicker radiator on normal days.. but not for track days or extended period of spirited driving...

 

[whats_doing]

both fans should kick in when you turn your a/c on

also bigger rad = more fluid.. which also mean you need faster way of cooling it down.. that's what I found anyway..

stock radiator fans may be enough to cool down the thicker radiator on normal days.. but not for track days or extended period of spirited driving...

Makes sense.
Might pay to invest in some bigger fans for next summer.

 

[Kaldek]

both fans should kick in when you turn your a/c on

O RLY? Hmmm...so perhaps my fan is busted. Yay, another expense!

 

[naughtika]

my plan is to have 1x 16" pull type with custom shroud to cover the whole radiator and 1x 12" push type (currently have 10" and is not enough)

or 2x 14" pull types

just not sure on clearance on the driver side

 

[pretzil]

I think shrouds are important, I have slimline fans but I'm pretty sure the factory fans were probably more effective, mainly due to the shrouds, pulling air through the whole radiator rather than just 2 circles...

 

[jungle]

I think shrouds are important, I have slimline fans but I'm pretty sure the factory fans were probably more effective, mainly due to the shrouds, pulling air through the whole radiator rather than just 2 circles...

Correctamundo

 

[AKKO]

I think shrouds are important, I have slimline fans but I'm pretty sure the factory fans were probably more effective, mainly due to the shrouds, pulling air through the whole radiator rather than just 2 circles...

My slim ones have a shroud, they're dual 12" (Flexalite 420), plenty of clearance but possibly on the small side but she's seen plenty of dyno time without fuss so that's a win in my book.

 

[AKKO]

O RLY? Hmmm...so perhaps my fan is busted. Yay, another expense!

Yeah could well be, found mine busted during servicing before I eventually replaced it and the rad.

 

[AKKO]

Anyone know the cfm rating of the OEM fan assembly??

 

[mookers]

Anyone know the cfm rating of the OEM fan assembly??

Really really low. Last time I saw someone wearing one, I didn't want to have sex with them at all.

 

[naughtika]

I think if you have a 16" pull type fan and have a proper shroud fabricated, you could pull this off

16" FAL fans are rated at 2500cfm. almost twice the cfm our stock does..

 

[TME_Steve]

Spal fans are good. I'd look at how to force air through at speed as well. The air that hits the front of the car has to get through your grille, then intercooler, then ac condenser, then finally radiator (after the others heated it up btw). Why not just go around all that? path of last resistance etc so blanking plates are a good thing.

The fans shouldn't even be needed at speed if it's designed right and they certainly don't move air at 100kph.

But if you're seeing the gauge go anywhere over half, it's running damn hot. Stock stat should be fully open at 80ish degrees and the fans are coming on at 91 and ramping up from there.

 

[Kaldek]

But if you're seeing the gauge go anywhere over half, it's running damn hot. Stock stat should be fully open at 80ish degrees and the fans are coming on at 91 and ramping up from there.

Time for a new thermostat for starters then.

 

[naughtika]

ask for the colder thermostat.. don't get the billion 65°C..

you'll regret it.. if you ask why.. your ISC keeps the idle up.. hence economy also gets sh1tty

 

[TME_Steve]

You want the engine at 75+ish. In evos that's 82 from memory. Everything including boost control is different below that.

 

[AKKO]

I recall the colder one (P/N: MD317015) being a 77 degree, has been talk on here about it in the past.

My bumper is now in need of a respray so also going to have my Evo 7 vents fitted which should assist some with the airflow.