So recently iv been noticing the engine bay gets pretty hot inside. My fans on my aluminum radiator work fine and i have confirmed this but temps are still pretty hot in the engine bay.

I was toying with the idea of installing a set of fans with shroud behind the radiator since my A.C condenser is not there anymore. In my theory the fans if turned on all the time will blow cool air through the radiator cooling down the radiator further and engine bay as well. The motor doesn't over heat but it just gets so hot i can't touch anything even my intake arm gets pretty hot to the touch. I might be overthinking this or my idea might be overkill but i just want some feadback if this would be a ok idea.

This motor will be boosted soon and will see some track days. I will also use some additives from redline in the radiator fluid to further cool down the engine coolant. But what do you guys think of this idea? overkill or a good idea that makes sense.

 

People do that often depending on how far their header/turbo manifold sits out. The only issue I see with running a shroud in the front is you'd be funneling incoming air towards just the two fans instead of across the entire face of the radiator. On the back side (facing the motor) thats fine because it would be sucking the air from the front across the whole core and out the back, but you'd probably be better off just mounting them directly to the radiator in the front.

 

Ok im not sure if you understood me, so i already have two fans and a shroud on the radiator facing the motor like it should. I want to put a shroud and fan setup behind the radiator not mounted ON the back of the radiator. It will be mounted behind the radiator to blow air on the back side of the radiator to cool it off as well as push air into the engine bay hope that makes sense.

 

I think I understand what your saying lol. Sitting still in traffic that would be helpful, but once your moving the fresh air would be plenty enough to keep things cool. You might have better results tilting the back of your hood up a tiny bit to help the hot air flow out and draw air in through the front.

 

Yea i have seen that done but i don't like the way the hood looks with the spacer to vent the engine.

My only issue or concern is when I'm driving i don't really see how cool air gets through the front bumper and through the radiator, seems to me its a dead zone in that area, I know honda designed these cars with all these in mind. But the only way i see air being drawn in to cool off the radiator would either be from the lower front of the bumper in which i have a front mount intercooler or from underneath the engine. I think a constant flow of air directly on the back side of the radiator will help out greatly in reducing the coolant temps and engine bay temps.

 

do you mean to have a fan mounted on the front bumper rebar or something and pushing air on the radiator and condenser??

 

Yes, it will be inside the front bumper and mounted behind the radiator blowing cool air on the back side of the radiator giving it a constant rush of cool air. There is no A.C condenser so it will blow directly on the back side of the radiator. Im basically trying to cool the radiator the same way a front mount intercooler for a turbo is cooled by the rushing air coming from the front of the bumper.

 

Maybe I'm just overthinking this! all these high hp hondas running around with no problem i think I'm just over thinking all this! but it does get hot in that bay.

 

Consider this...big front cut outs, i did the bumper cut not the hood on mine when i still had my usdm front and made custom airdams out of the turn signal area. It defiantly ran cooler then when i had the center and upper portion in


NO MY CAR IN THE PICS it was a team mates car. he got 2nd place at GTA:SLB (button willow)

 

Interesting! looks pretty cool literally lol! i think ill just do some more research and maybe ill toy with this idea and see if it works! ill be getting some heat temp strips and ill see if i see any difference in temps in the bay on certain surfaces like the intake ect..

 

They made integras for 7 years. If there was a cooling problem, it would have been adressed.

You want your engine to stay cool enough that you can touch all of the items in the bay after driving it for some time? I should point out that engines burn gasoline to work.

 

Um duh! iv been building these cars for like 11 years, I'm no noob, I'm not trying to touch things after i drive it i pointed out that among the rest of the engine components the intake arm gets pretty hot so i just wanna try and cool engine bay temps down. Ill be boosting this motor again soon and having my charge arm that hot will hurt power a lil. Ill be looking into fabricating a water to air intercooler as well for the supercharger but i need temps as low as possible for better performance when this thing sees some track days and **** starts to really get hot!

 

Pusher fans aren't really that efficient. You should measure IAT's. Your intake arm is a good heat conductor. It will seem hotter than it actually is to the touch. That doesn't mean the temperature of the moving air inside it is hot.

Practical example: your bathroom tiles are the same temp as your bathroom rug. But the tiles seem colder because they are a better thermal conductor. Metal is an even better thermal conductor. So its going to seem hotter or colder than other types of surfaces.

Your NA integra doesn't need additional cooling air. If you have a charge cooler sitting in the front bumper, your supercharger air will likely stay cool as well. Water injection and/or water cooling it isn't a bad idea. But ditch the complex fan idea. Don't worry about cooling off the air until its an issue. It's not an issue.

Temps that seem uncomfortable to you are very comfortable for your engine. You cant say "I need cooler EGT's because my header burned my hand".

I'm sure you know this....but I'm demonstrating my point.

Air into your engine bay isn't an efficent way to cool a charge. Cool air into or onto a charge/radiant stream is a good way. Ducts should direct air at surfaces readily radiating heat (radiator, intercooler). Even if the bay is hot...the charge air and coolant will be cool.

Duct smart....not hard. Insulating your charge air path is also smart.

Don't worry about engine bay heat or heat on surfaces that don't matter.

 

Thanks that makes allot of sense, I'm sure when i incorporate a water to air intercooler for the blower intake air charge temps will drastically drop but for now it bogles me on how hot this motor feels when i pop the hood after a good 30 min drive. The fan idea wasn't to drop the intake air charge itself but the engine bay temps and radiator specifically, I know its going to be hot obviously especially in C.A whether but i just thought a set of fans blowing on the radiator will help keep the coolant cooler thus keeping the engine cooler, it only makes sense and the fact that the radiator doesn't really get any free flowing cool air made me think of this idea.

 

Integra radiators are big. They get tons of fresh air. Best way to duct is to have a flow thru path.

Pumping more air into the bay won't help. It has to exit.

Hot air goes up.

Place a fresh air duct in a blank spot on the bumper or maybe in the headlight. Place an exit duct in the hood. Vented hoods are for hot air exit. You'll be using the duct in the bumper to increase engine bay pressure by filling it with fresh, cool air. The pressure will blow out hot air from the hood duct. The ducting path should blow thru your radiator and charge cooler.

Gotta flow thru.

You could also put risers on the back of your hood...but...it looks so terrible.

 

I see what your saying! only problem is theres no place i could put a duct in the front bumper cause my front mount intercooler sits there! wonder if cutting out my high beams and using the two holes as a duct to divert air to the radiator would be a good idea, but this for the time being is still a street daily driven car, i don't like the way the vented hood spacers look like you said it looks so terrible. And cutting out my head lights will look cheesy to me.

 

Cut out headlights look good as hell. You can also add a CF duct between the headlights in the bumper. Sometimes you have to slice up bumpers with no regard for human life.

 

Wht not run the front emblem area cut out if no headlights are cheesy what about the s2k guys with VOTLEX wings ?. I'd rock a voltex wing even tho it may look silly it serves a function, better then stretched tires and stance

 

You want a fan for your fan? Are you overheating? If not, then don't **** with it. Just because you think it is "hot" doesn't mean ****. Yes, the engine was designed to run 190* F. If you are overheating, then we have a different case on our hands.

You mention you want fans behind your radiator (which would mean in the engine bay), but then you tell us what you removed from the front of the radiator. You either are asking for another fan in the engine bay to push the heat out, or a pusher fan on the front, which is not necessary if your puller fans in the bay are adequate.

 

Basically i want a set of fans behind the radiator where the ac condenser used to be to blow air towards the radiator to give it a stream of cool air to help keep the radiator cooler. I already have pusher fans on the front of the radiator and they work fine. I drive this car everyday for about 45 min straight on the freeway and back home its my daily for now.

I think like i said before ill do some testing if i do do this mod and see if i have lower temps by placing heat temp strips on certain areas like the radiator and intake arm ect. and do a comparison with the fans on and see if the temps drop significantly or any at all when the fans are blowing on the radiator after a while, If it does absolutely nothing then ow well lol.

 

Pusher fans are worthless. Thats why the car came with a puller fan.

A pull fan with a shroud is most efficient. They sell dual fan setups with shrouds.

Seems as if you already have puller fans. Leave it alone. It's an engine. They all get hot.

 

The amount of air flowing in naturally at highway speed will be more then the fans can even dream of. The only way that setup will be slightly beneficial is in stop and go traffic but as bserious pointed out, theres no outlet for the air your going to be adding from the fans. So its going to just get pushed in and hang out with the other hot air already in there. I wouldn't bother spending money on the fans and the work to mount them.

 

I would be more worried about the actual temps the engine is running, have you added an oil cooler? use a setup with a thermostat so it doesn't over cool, big help in keeping actual engine temps down. I have a low profile cowl induction type fiberglass scoop, used to be a functional air intake, I thought about mounting a low profile fan to it, and setting it to only come on when it got really hot under the hood, traffic etc. blow hot air out of the bay

 

Absolutely not true.

A proper "pusher" fan(s) will move as much are as a puller fan(s).

What can restrict airflow is using both puller, [engine side of rad] fan(s) and pusher, [bumper side of rad] fan(s) at the same time.

I do agree adding or changing the fans the OP has will make no difference in engine bay temp., ducting/venting/directing air into the engine bay will. 94

 

Maybe a duct tube from the front of the bumper routed to the engine bay would help direct a cool flow of air into the engine bay but the only place would be the signal corner light which i need till its not my daily anymore and my track car till then i guess thats all i could do besides ading some radiator cooler in the coolant from redline. And the motor has a oem oil cooler already.