Topic: Cooling Issues (Read 98266 times)

patsmx5 · « **Reply #60 on:** October 29, 2009, 05:26:48 PM »

Urban, it doesn't matter if the radiator has a direct path to air.

Ok, it does, but it doesn't have to. Pressure is what makes air flow through the radiator. The air will turn if it needs to. If you put a big fan blowing in your bumper right now, you'd see that most of the air entering the bumper exits somewhere other than through the radiator. Everywhere it leaks, put a shield there. If you seal all the holes up, then when air enters it has nowhere to go but through the radiator, and pressure will build up, and then air flows through the radiator. Even if you had good shrouding right now I can see the top of the radiator is wide open, so air would just go over the radiator, and possibly under it.

Random Hero · « **Reply #61 on:** October 29, 2009, 05:32:11 PM »

Quote from: patsmx5 on October 29, 2009, 05:08:53 PM

an oil cooler cools the oil that removes heat from the rotating assembly and valvetrain. The radiator/cooling system removes the bulk of the heat though. If it's overheating riding around town, it's not cause the oil is being overheated to the point that it's overloading the cooling system. I mean, yall seriously believe that?

ugh... yes we understand this. sometimes as i pointed out in a previous posts in this thread, cooling the coolant alone WONT SUFFICE so you end up having to cool the oil. I've had a shitload of experience in this between race cars and typical high hp honda/nissan shit. If your oils hot it transfers alot of heat, and oil is typically ran hotter then the coolant. The hotter the oil is, the faster it breaks down on top of heating the motor up..

patsmx5 · « **Reply #62 on:** October 29, 2009, 05:38:26 PM »

Well I'm pretty sure if he shrouds things up well he can increase the airflow through his radiator 3-5 times what it is now, and that should kill the overheating problems he's having. No way would I resort to adding an oil cooler system before doing the obvious stuff.

Foowee · « **Reply #63 on:** October 29, 2009, 05:53:14 PM »

What about running a 170 t-stat with a couple holes drilled in it?

What pressure is your radiator cap rated at?

Urban Indian · « **Reply #64 on:** October 29, 2009, 06:21:42 PM »

I think I will try both options, hot oil is something I don't desire, it will also help raise the oil capacity. Rad shrouding is the main issue. I want an electric water pump and electric fan combo so that I can control and fine tune my water temps for reliability and repeatability at the track.

The problem with the fan always on is it is hard to get it hot when you need it to be. It stays cold all the time which is not good.

Random Hero · « **Reply #65 on:** October 29, 2009, 06:32:36 PM »

thats why you run a t-stat

random-strike · « **Reply #66 on:** October 29, 2009, 06:38:58 PM »

Quote from: danwjmu on October 29, 2009, 01:06:20 PM

The purpose of the tstat is to get the engine up to operating temps quickly by keeping the coolant from circulating through the radiator. That is it's only purpose.

wrong.... dumbass lol

hotrex · « **Reply #67 on:** October 29, 2009, 07:10:26 PM »

bigdaddyvtec · « **Reply #68 on:** October 29, 2009, 07:15:56 PM »

Quote from: Foowee on October 29, 2009, 03:20:04 PM

because its fucking free, easy, and effective...

No, Gay will suffice, being as you fail at quoting here FREEBIE

Quote from: bigdaddyvtec on October 29, 2009, 02:51:15 PM

because its fucking gay

Oil cooler and fan shroud, keep that big queer intercooler... It works... But definately run a Tstat.... If you even THINK you need to take it out you have issues ELSEWHERE in your shit you need to adress....

Like your oil temp. Ive seen how bad Ross; dads car was ... like mentiioned it had two fans on it.... On top of all that you likve near the north fucking pole... If youre having trouble up there.... Youd HATE it doen here.

danz · « **Reply #69 on:** October 29, 2009, 07:43:32 PM »

i had overheating issues in the summer when my rad wasnt shrouded..

i built a shroud and blocked off the rest of the area air was able to get into the engine bay and it was all good

the lower the pressure inside the engine bay the more likely the high pressure air in front of the car will want to travel through your IC and rad

ratcityrex · « **Reply #70 on:** October 29, 2009, 07:55:12 PM »

Quote from: Urban Indian on October 29, 2009, 06:21:42 PM

The problem with the fan always on is it is hard to get it hot when you need it to be

Not true, my shits up to full temp in less than 10 min. 5 in the driveway and by the time i get into 5 min worth of normal driving its up to full temp.

dvst8r · « **Reply #71 on:** October 29, 2009, 08:13:02 PM »

Quote from: danwjmu on October 29, 2009, 08:09:50 PM

How much colder is BC than WA at any given time?

He is 500 miles north of the border. In the summer on average probably about 15F.

ratcityrex · « **Reply #72 on:** October 29, 2009, 08:14:21 PM »

Where he lives lets just say in the winter I dont think he will dirve his civic into the snowbanks like they did with the blackwhornet.

bigdaddyvtec · « **Reply #73 on:** October 29, 2009, 08:16:44 PM »

that pic was awsome

random-strike · « **Reply #74 on:** October 29, 2009, 09:01:45 PM »

yikes. cooling system = simple. yet so much confusion

you can have the fan on full blast 24/7 and when the thermostat is closed it won't make a bit of difference to the coolant inside the engine.

you might have a large drop in temp when the tstat opens, my mud truck will heat up to 210 and the thermo finally opens enough and it'll drop down to 170 then level out at 190.

if you try to run without a thermostat when its cold outside the temp will never reach operating, and if its very hot outside its likely you will always overheat. depending on your cooling system, certainly a stock system will overheat w/o a thermo in hot weather, but if you have a big ass 4 core alum rad it might be fine

tstat = required component on street car.

j.h.christ · « **Reply #75 on:** October 29, 2009, 09:12:31 PM »

get a new intercooler

bigwig · « **Reply #76 on:** October 29, 2009, 09:14:16 PM »

http://auto.howstuffworks.com/question248.htm

You don't need to take off the tstat. Its function is what you want. You want more coolant flow after a certain temperature. That is what it does. I don't understand why people think of this concept as confusing....

ratcityrex · « **Reply #77 on:** October 29, 2009, 09:16:54 PM »

lol, if you have a tstat in it, it slows the flow of coolent down in your system. That way it has time to cool the water down.

bigdaddyvtec · « **Reply #78 on:** October 29, 2009, 09:17:15 PM »

Quote from: j.h.christ on October 29, 2009, 09:12:31 PM

get a new intercooler

hHHAHAHAAHAH

bigwig · « **Reply #79 on:** October 29, 2009, 09:34:06 PM »

Quote from: ratcityrex on October 29, 2009, 09:16:54 PM

lol, if you have a tstat in it, it slows the flow of coolent down in your system. That way it has time to cool the water down.

You're an idiot.

ratcityrex · « **Reply #80 on:** October 29, 2009, 09:35:32 PM »

Thank you

patsmx5 · « **Reply #81 on:** October 29, 2009, 10:17:28 PM »

Quote from: ratcityrex on October 29, 2009, 09:16:54 PM

lol, if you have a tstat in it, it slows the flow of coolent down in your system. That way it has time to cool the water down.

Yeah... don't work like that.

Urban Indian · « **Reply #82 on:** October 29, 2009, 10:22:41 PM »

i have a 170degree tstat in it right now. Problems that I have is it wont open sometimes and it is 200degrees in the head.

RELAX everyone

I will def do the shrouding. Just need to figure out a way to make it look nice since this year I will be cleaning up my disgusting wiring and engine bay. fan will be hot wired so that I can just turn it on when i please.

Thinking of getting this kinda deal made up so I can just pick what I want and also use my Co2 and meth setup.

patsmx5 · « **Reply #83 on:** October 29, 2009, 10:26:46 PM »

I went to lowes and bought an ABS plastic concrete mixing tray. Like 5 bucks, and the thing is pretty damn big. Cut it up to make some nice black plastic shrouding, and used some of the curved pieces of it where I needed to. With the bumper installed you can't see any of it unless you're really looking for it. Nobody's ever noticed it. Just used Plastic-Weld epoxy to glue it in place to some of the factory shrouding, and riveted some pieces in where needed with a pop-rivet gun. I'll see if I got any pics.

bigwig · « **Reply #84 on:** October 29, 2009, 10:37:00 PM »

Quote from: Urban Indian on October 29, 2009, 10:22:41 PM

i have a 170degree tstat in it right now. Problems that I have is it wont open sometimes and it is 200degrees in the head.

Why isn't your tstat opening when it is supposed to?

Personally, I see your problem as being fixed doing the following things.

1. Better radiator location/orientation.
2. Better air flow to the radiator.
a. Add shroud.
b. Add another fan
3. Add an oil cooler
4. Figure out why your tstat isn't opening when it is supposed to.

I'd follow Pat's advice on how to set up for testing the air flow to increase radiator efficiency. Everything he has posted in regards to this seems pretty sensible.

patsmx5 · « **Reply #85 on:** October 29, 2009, 10:43:33 PM »

Pics

Before I did this, my miata would overheat at 55+ mph. I run a 195*F thermostat, stock radiator, 20x12x3 core IC, and an A/C condenser. About 300whp setup. Before the shrouding, it ran ~205*F at low speed cruise, fans on at 200*F, and after 55mph it was over 220*F.

After doing this, it sits at 196-197* at anythng below 65mph, doesn't matter if it's 40*F or 105*F with the A/C blasting wide open. At 70mph, it runs about 205*F with fans on.

random-strike · « **Reply #86 on:** October 29, 2009, 10:43:41 PM »

Quote from: danwjmu on October 29, 2009, 09:09:57 PM

Explain to me how a tstat keeps it cooler in hot weather vs without a tstat where the coolant flows 100% of the time.

if there is no tstat and the radiator isn't up to the job... the coolant will not stay in the radiator long enough to cool down.

in a completely stock car, the tstat will open and close, and it will allow the coolant enough time in the radiator to cool off.

random-strike · « **Reply #87 on:** October 29, 2009, 10:49:53 PM »

Quote from: danwjmu on October 29, 2009, 10:48:35 PM

lol

Yeah that's how efficient heat transfer works...

dude, don't question me, especially on something as simple as this. its basic automotive tech.

http://www.2carpros.com/dia/test_thermostat.htm

Quote

A thermostat consists of a main housing, a plunger style of valve and a temperature sensitive mercury filled plunger that acts as the sensing and activating device with a return spring. A thermostat maintains engine temperature as is opens and closes throughout the engine operation.

patsmx5 · « **Reply #88 on:** October 29, 2009, 10:56:10 PM »

Quote from: random-strike on October 29, 2009, 10:43:41 PM

Quote from: danwjmu on October 29, 2009, 09:09:57 PM
Explain to me how a tstat keeps it cooler in hot weather vs without a tstat where the coolant flows 100% of the time.

if there is no tstat and the radiator isn't up to the job... the coolant will not stay in the radiator long enough to cool down.

in a completely stock car, the tstat will open and close, and it will allow the coolant enough time in the radiator to cool off.

I agree that not using a thermostat is retarded, but you are incorrect saying "if there is no tstat and the radiator isn't up to the job... the coolant will not stay in the radiator long enough to cool down". That is wrong on several levels. Pick up a themodynamics book and look up isothermal heat transfer.

bigwig · « **Reply #89 on:** October 29, 2009, 10:56:59 PM »

Quote from: random-strike on October 29, 2009, 10:43:41 PM

Quote from: danwjmu on October 29, 2009, 09:09:57 PM
Explain to me how a tstat keeps it cooler in hot weather vs without a tstat where the coolant flows 100% of the time.

if there is no tstat and the radiator isn't up to the job... the coolant will not stay in the radiator long enough to cool down.

in a completely stock car, the tstat will open and close, and it will allow the coolant enough time in the radiator to cool off.

This is completely wrong. How do people not understand how a thermostat works and what it's purpose is? The tstat closes when the fucking engine is cool enough not to need coolant flowing through the engine. The purpose of a radiator is to effectively cool the coolant enough simply by flowing through the system. The coolant is roughly 190*. The air outside is anywhere from 30-100*. Enough surface area on the radiator, and it doesn't take much time at all to drop 50*. Air is a piss poor thermal conductor, and through an intercooler you can easily see a 100* drop. You guys seriously need to go back to automotive fundamentals if you don't understand how a radiator/tstat/coolant works.

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Author Topic: Cooling Issues (Read 98266 times)

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