hate to say it but your .02 is wrong. turning the fans off while going down the road will cause your temp to rise. No matter if you are going 55 or 110 all motors generate heat and still need some sorts of added fans to pull or push heat from the rad. air flow alone is not enuff to cool the system down. I have felt the proof of this recently. loaned my car to a friend. fuck ass didn't turn the fans on while going down the highway. popped upper rad hose. as well as blew my damn head gasket. ~true story.





As for the debate P.K. and I where having. I will agree on the loss of power w/ electric fans to an extent. thinking about it. if electric fans are not cooling the system efficiently and have to remain on for the duration yes. they can cause a power loss. Yet that same thing needs to be in consideration for the clutch fans.

How ever either way. the whole cooling system needs to be taken into effect. what rad is the car running. what size are the fans, "clutch (OEM / HD, does the clutch using OEM / flex) or electrical (power drain of fans, 1 or 2 speed) , cfm's, coolant ratio and coolant additives, thermostat temp, does the car have any other sorts of letting heat escape from the engine bay. All these little things can play a part on cooling and power loss.

I don't doubt your dyno charts that you have. Tho I do wonder on how much detail was taken into effects when obtaining your information. even simple things as temp of each day, humidity levels, was there a breeze blowing into the shop. can make a difference.

If I as still down in Fl. I would be willing to spend a day or two in breaking the myth of: which is better electrical or clutch. feels like lighting just struck my brain we should email the myth busters.
~skott

 

skott,
generally, you make some very worthwhile posts, but this last one intriged me to prove you wrong.


lets say you have a fan on youre car that pulls air through your radiator at 1800 cfm, which is pretty reasonable i believe. 1800 cfm is one thousand eight hundred cubic feet per minute. in any given minute, there are 1,800 "cubes" of air coming through that fan at one foot by one foot by one foot lengths. if you have 2 fans, the total amount brought through the core of the radiator is doubled to 3600 cfm. that translates to roughly 40.91 cubic miles of air per hour. so, given that the fans are running at maximum efficiency, after about 41mph, your fans are no longer helping, but hurting the flow of air.

my guess as to why your head gasket blew was because your friend was beating the shit out of your car, or you need to put some ducting between your intercooler and radiator. the later of the two has proven to be the most effective way to cool your engine down at speed short of pooring ice water into it.

 

little info my nubian brother type.
when the head gasket was blown the ka was stock. only things that where done where bs mods. z32 ff, advanced timing, a/c removal, ghetto air box mod, and electric fans. Now you have to take into fact that the chuki bumper isnt the best air flowing bumper on the market. so there is some air restriction. hence why heat can and was built up. as for the car being beat on. mmm i can only speculate.


how ever i will give you this. You sir are 1/2 right. reasoning being is simple. say that i used a thermostatic switch as opposed to the high / low switch i currently have. while making a simple trip say a 100 mile trip. "i see that being reasonable" Sure there are a good amount of cfm's coming thru and cooling system. keeping the motor in operating temp. as i either start to come up an incline or up a bridge. more power is needed and more heat in generated. the cfm's are now not efficient to cool the system. so the thermostatic switch looks at the fans and says yo my niggas ya'll be needn to help a brotha out and then in turn they look at the switch and say fo sho, my nigga. Chances are pretty good that you wouldn't even notice this process happing while driving yet it does. even for a fraction of a minute or two.

but shit im getting like all uber tired. i need to take my black ass to bed before i say something wrong. chances are pretty good that might happen.
~sktt

 

un gaurd mis sor poo zee cat!

mm yes powers of the dark side we are. yes.

 

silicone, RTV, penii juice, peanut butter. all the same bag o donuts.

 

i'm not trying to start a new argument or anything, but....

you are also half right. at 60 mph (way below what any of us would normally do on the highway) the natural flow of air is about 5,280cfm, at 70 mph it goes up to 6,160 cfm and at 80 it goes up to 7,040 cfm. still far more than the average flexalite setup or even a (gasp) clutch fan.

 

sa'll good homie. im not arguing the facts. thats was all ready done up here in va w/ a few friends of mine. needless to say. i won the debate. theres so many ways to approach cooling. from dyno pulls, track event, fucking off in the street even every day driving / road trips.

even the holes that where cut for the charge piping to go thru where cut fairly large. simple reasoning is too have the vents from the chuki front bumper force air thru them. thus forcing hot air in the engine bay to blow out from under the hood. the hood was shimmed w/ 25mm bolts. just need to clean those holes up w/ a dremel and a lil trim work. have to face the fact. i drive like an ass sometimes and i need to get that hot air out of there as much as passable.
~skott.

 

do some ducting. theres a test done with an sr and a bunch of different methods of cooling that shows ducting is by far the most effective thing you can do

 

werd. i wasnt aware of that. now im gonna have to go on a search to see what they did verses what im looking at doing.

BTW Speed cat, any more info on your car? really want to see what you came up w/.

also sorry for McHijacking your thread. yo!
~skott

 

ok, As of yesterday I found out adn replaced my melted temp wire that got heat soked from my o2 sensor on my exhaust manifold...... I also had a broked exhasut maniflod bolt in the bead so it blowing hot exhasut gasses in my car could have a possibility with temp 2...Im buying an easy out today...I got the ampro screw extractor and a black and decker one and they both broke in half so I will try a snap on today.....Any advice on THE strongest easy out, I really don't want to return adn redrill,cut and sand another broken easy out. I hadent had time to do the other shit to my car so Today I flush it and I should have my water pump soon...