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Cooling fan on the hood??



 
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heshan
Takumi



Joined: 08 Nov 2008
Posts: 377
Location: Colombo - Sri Lanka

1987 Toyota Corolla AE86 (late JDM Trueno)

PostPosted: Wed Aug 10, 2011 11:07 am    Post subject: Cooling fan on the hood?? Reply with quote

Guys do you think adding a small cooling fan from a rad to take the exhaust heat would do any good?

I've lifted my hood to take the heat out of the front of the car over the windshield but I think that's not sufficient in my country where the tarmac is heated up to around 40Centi or even more during a normal day..

So do you think this will help and do you think it will only be my battery that would be a problem for me if I sort my space problem?


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Uzelac
Bunta



Joined: 07 May 2008
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Location: Zemun, Srbija

1985 Toyota Corolla AE86 (early Levin)

PostPosted: Wed Aug 10, 2011 1:36 pm    Post subject: Re: Cooling fan on the hood?? Reply with quote

Cut the hood, make vent.
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fax0815
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Joined: 14 Nov 2010
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PostPosted: Wed Aug 10, 2011 2:06 pm    Post subject: Reply with quote

Much easier and does the job
http://www.s2ki.com/s2000/gallery/page__module__images__section__img_ctrl__img__731885__file__med


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IBMFD3S
Ryousuke



Joined: 27 Aug 2005
Posts: 170
Location: Holland

1986 Toyota Corolla AE86 (late EU)

PostPosted: Wed Aug 10, 2011 2:24 pm    Post subject: Reply with quote

maybe wrap the exhaust and remove the rubber at the windscreen side at top of the firewall

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heshan
Takumi



Joined: 08 Nov 2008
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Location: Colombo - Sri Lanka

1987 Toyota Corolla AE86 (late JDM Trueno)

PostPosted: Wed Aug 10, 2011 2:31 pm    Post subject: Reply with quote

I really dont want to cut the stock hood cuz its precious..

I've lifted the hood at the windshield side about 1.5 inches but dont want to remove the beading either cuz that beading stops all the leaves and even the excess water from going in too much to the engine bay.. Believe me when it rains it rains hard in Sri Lanka..

Isn't wrapping the header and putting a fan much easier??


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NoHachi
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PostPosted: Wed Aug 10, 2011 2:49 pm    Post subject: Reply with quote

Doesn't sound like you have a problem? If the car is happy and not overheating, why complicate things?

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heshan
Takumi



Joined: 08 Nov 2008
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Location: Colombo - Sri Lanka

1987 Toyota Corolla AE86 (late JDM Trueno)

PostPosted: Wed Aug 10, 2011 3:17 pm    Post subject: Reply with quote

Actually my problem is that the driver and passenger gets quite a bit of heat inside.. Driving during the day with the road being quite warm and the engine heat being leaked into the cabin believe me is painful!!


How do I solve that? I was thinking even putting a heat shield at the firewall on the inside as i dont want to remove the engine but that's a bigger job than putting a fan.. Sad


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Uzelac
Bunta



Joined: 07 May 2008
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Location: Zemun, Srbija

1985 Toyota Corolla AE86 (early Levin)

PostPosted: Wed Aug 10, 2011 3:22 pm    Post subject: Reply with quote

Fan won't make any difference, regardless of size.
Fan capacity is ridiculous compared to volume of the air that moves around car just because car is moving.

As you must know, fan will do the job only at really low speeds, when the car reaches 30+ km/h, his job is done.

Make some tunnels and ducts in front or under the car if you don't want to cut hood.

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Bean Bandit
Bunta



Joined: 23 Jul 2006
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Location: TelAviv/Israel & Switzerland

1986 Toyota Corolla AE86 (late EU)

PostPosted: Wed Aug 10, 2011 3:37 pm    Post subject: Reply with quote

The only real way to have it cool inside the cabin in countries like ours is AC.
The only problem I had is while racing with the footwell getting very hot above the downpipe. This can be sorted woth some heatwrap.
Honestly I doubt any change to try and lower the enginbay temps will have any effect on the cabin as long as you have all the blanking plugs in the firewall fitted.


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heshan
Takumi



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Location: Colombo - Sri Lanka

1987 Toyota Corolla AE86 (late JDM Trueno)

PostPosted: Wed Aug 10, 2011 3:55 pm    Post subject: Reply with quote

Where do I get these wraps? Is it available online? Ebay??

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Bean Bandit
Bunta



Joined: 23 Jul 2006
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1986 Toyota Corolla AE86 (late EU)

PostPosted: Wed Aug 10, 2011 3:59 pm    Post subject: Reply with quote

Plenty of race shops have them - driftworks.com for exampel. Alternative if available in your area is ceramic coating.

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IBMFD3S
Ryousuke



Joined: 27 Aug 2005
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1986 Toyota Corolla AE86 (late EU)

PostPosted: Wed Aug 10, 2011 6:30 pm    Post subject: Reply with quote

http://shop.ebay.com/i.html?_nkw=exhaust+heat+w...t+wrap&_rdc=1

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allencr
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Joined: 26 Aug 2010
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PostPosted: Thu Aug 11, 2011 7:25 am    Post subject: Reply with quote

heshan wrote:
Actually my problem is that the driver and passenger gets quite a bit of heat inside.. Driving during the day with the road being quite warm and the engine heat being leaked into the cabin believe me is painful!!
How do I solve that?


I've lifted my hood to take the heat out of the front of the car over the windshield...

I've lifted the hood at the windshield side about 1.5 inches...

You don't have any problem that you haven't caused yourself!
Quit making things worse. Make sure all air hitting the front goes through the radiator. Don't let engine compartment heat enter the cabin from the high pressure area in front of the windshield.


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heshan
Takumi



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Location: Colombo - Sri Lanka

1987 Toyota Corolla AE86 (late JDM Trueno)

PostPosted: Thu Aug 11, 2011 2:40 pm    Post subject: Reply with quote

To make sure all the air goes through the rad I can put an aluminum sheet between the front of the hood and the rad from the inside correct?

But I apologize for not understanding but what do you mean by

"Don't let engine compartment heat enter the cabin from the high pressure area in front of the windshield."

Are you referring to the area between the hood and the windshield where the wipers and the water draining openings are?


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Okami
Bunta



Joined: 16 Mar 2010
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1986 Toyota Corolla AE86 (late EU)

PostPosted: Thu Aug 11, 2011 4:37 pm    Post subject: Reply with quote

Nice to read this...

I will also consider Ceramic Coating and heatwrapping my car as I also hate the heat coming from the exhaust / engine.

Sometimes you open the door after a bit of a drive and just feel the heat eating my up at the doorside.

But then again I have heat allergies so for me its more severe than any normal human being hahahaha.


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gt4st205
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PostPosted: Thu Aug 11, 2011 6:30 pm    Post subject: Reply with quote

Have you tried adding an air tube? try to use something like a laundry vent tube to divert air where you want it. just start it at the bumper. It does't look the best, but it works for my cold air intake.

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Okami
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PostPosted: Thu Aug 11, 2011 7:02 pm    Post subject: Reply with quote

I see that D1 drivers also use tubes for cooling in their suits.

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allencr
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PostPosted: Thu Aug 11, 2011 9:29 pm    Post subject: Reply with quote

heshan wrote:
Are you referring to the area between the hood and the windshield where the wipers and the water draining openings are?


Yes, it's a high pressure area good for feeding the interior's ventilation system and not so good for letting air out of the hood/bonnet & many manufacturers put a seal/weatherstrip there, while you've opened it up.

I don't know what your alum. sheet is doing, IIRC the AE86 has a seal between the radiator bulkhead and the hood.


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heshan
Takumi



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1987 Toyota Corolla AE86 (late JDM Trueno)

PostPosted: Fri Aug 12, 2011 7:23 am    Post subject: Reply with quote

http://honda-tech.com/showthread.php?t=1506827

I did a bit of research lifting the hood from the back a bit before I did. These guys think its a good way to keep air flowing into the engine bay and cooling it..

What I've done is almost like COWL Induction.. Hope it'll work Smile


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allencr
Wataru



Joined: 26 Aug 2010
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Location: Tallahassee Florida USofA


PostPosted: Sat Aug 13, 2011 7:32 am    Post subject: Reply with quote

Splash guard in place under the front end? Even though it's called 'splash' it helps a lot with the air flow around the rad & engine too.


heshan wrote:
bit of research lifting the hood from the back a bit before I did. ...COWL Induction...

Yes, if by 'COWL Induction' you mean helping the engine a little & heating the cabin occupants a lot.
http://www.club4ag.com/faq_and_tech_pages/more%20on%20cooling.htm

http://www.club4ag.com/faq_and_tech_pages/Moto-P_Part6.html

Thanks Moto-P.


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roman
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PostPosted: Sun Aug 14, 2011 6:58 am    Post subject: Reply with quote

I've done the opposite, my car didnt come with those seals on the rear of engine bay / front of bonnet etc, so I've put them back in to make the radiator work better. (As I'm running a half width radiator that I'm trying to squeeze some reasonable efficiency out of)

Have also blanked off any hole into the engine bay apart from through the radiator and into the engine's air intake.

I'm also going to make up a tray underneath that only lets air out of the back of the engine bay.

Otherwise you get air entering the engine bay just after the radiator, when you want to keep it out as much as possible.

My car will probably get hotter at low speeds than one with a raise bonnet, but how long are you at low speeds when you're giving it a boot full, and need the full potential of your radiator?

Heat wrap on the exhaust is probably the most effective way to reduce under bonnet temperatures.

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Bean Bandit
Bunta



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1986 Toyota Corolla AE86 (late EU)

PostPosted: Sun Aug 14, 2011 8:16 pm    Post subject: Reply with quote

not sure about the exact physics but I thought the fast flowing air above the hood and windshield would create sufficient low pressure area to suck the heat of the engine bay away from the airvents if one has removed the rubber and/or raised the hood. This principle at least works efficient enough with airbrush/paintguns units that have a bottom mount paint reservoir

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