Ive been doing research on this and found no one who uses the fan switch without the thermostat. anyone doing this?

Mugen says the thermostat is required, but i dont see why?

 

While not quite the same I was running a mihsimoto fan switch which opens up at the same temp as the mugen fan swith w/ stock thermostat.

 

no problems at all with that setup? car heated up fine? didnt overheat?

 

Hard to say haha, I ran the setup very briefly before having a mess of other (unrelated) problems with my cooling system. it should be sorted out tomorrow though, so we'll see.

 

to me you would need the lower temp thermostat...

your fan would do all that work to bring it down to 180 or whatever it is, which would make the thermostat close, seeing that the stock one probably opens at 195 or something...

thats my thought

 

Its quite self explanatory as to why you SHOULD be running both pieces together and not just one or the other...

The Mugen fan switch allows the fan to activate at a LOWER temperature. Your stock thermostat is say 180 degree but your fan switch is kicking the fan on at say 175 (just an example, I am not EXACTLY sure of the Mugen value)... As you can see, the two components will be fighting each other... now you put in a 170 degree thermostat and you can see that the two components would work better together...

Now, I need to ask why you are concerned with the temperature of your thermostat and your fan switch? What are you going to accomplish by running the car cooler? If you run it too much cooler then the stock values your ECU is going to richen up the mixture slightly as it would normally do thinking the car is still warming up. Whats this going to do to your mileage? People need to stop and think a touch about what they are doing instead of just putting parts on the car thinking it must be "better" because its from brand x.. Mugen stuff is more designed for road racing. Continuous high rpm and thus more strain on the cooling system/engine.

 

If mugen says its required u should get it prob, only because a stock honda ther.stat opens at 78deg C and the mugen one opens earlier I'm sure. prob works properly together.

 

Well i dont want to get into an E-arguement with someone else on a forum lol... but basically im very informed about the literature of the mugen stat and switch. im looking for people with real world experience on them both because as anyone who has researched knows, theres alot of mixed reviews. im aware theres a possibility the ECU may stay in closed loop and temp may be too low. im also aware there is potentially a power loss and fuel mileage loss in this situation. however, this car is a 100 mile a day commuter car, and an occasional weekend warrior that sees alot of spirited driving. often i seem to get alot of high temperature readings after spirited driving, long highway trips, and obviously during track days. a mugen stat and switch would be ideal in my situation. my question was using the stock tstat with the mugen switch, what type of results could i expect? (i.e. overheating underheating, engine taking extra long to heat up? those r the kind of questionss id like answered.


*edit*

thanks hybrid96EK for the useful information and explanation.

 

Wasn't trying to argue, just was explaining my understanding of why the two should go hand in hand. I don't think you will find too many people who are using these products, but its certainly worth a shot!

 

hah yah thats why i said i dont wanna argue... i understand what u meant. i know its a long shot but you never know

 

dont get either piece, there is no gain from adding them to a street car. it will not prevent overheating and your car needs to be at the correct operating temp to function properly. just like overheating can hurt the car, so can underheating (coolant temp too low). oem thermostat and fan switch are perfectly fine. if you are getting temps above 200* them there is some other problem.

if you dont believe me then take it from the guys at hondata, they know honda ecu's pretty well http://www.hondata.com/techthermostat.html

 

ive been doing mucho research on this, and actually i think ive found the source of my problem. apparently my car has a single core radiator. *thud*

im going to start with a dual core radiator before i venture into expensive thermostats and fan switches ;-)

 

That'll do it.. I'm not sure which chassis you are running, but you can get brand new Del Sol dual cores from the B16 sol's for $100 and some change from 1-800-RADIATOR.

 

its in a 97 hatch.... so yah a dual core is gonna be step 1.... should solve the problem

 

It will solve all your problems. You will need a new upper radiator hose to fit the dual core also... the top hose connection is larger then the stock civic one.

 

what exact problem are you having? are you overheating? if so when? all the time, in traffic, on the highway? are you losing coolant? is there air in the system?

basically the fan switch isn't the answer, lets find the real problem

 

i explaine it in detail in one of my earlier posts, basically after spirited driving temp rises more than normal, and while in traffic my temp guage will go between 3/4 and full ( fan kicks it back down like nromal) but its apparent in my eyes that the cooling system is not efficient enough