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Thread: Intercooler fan

  1. #11
    Patrol Guru Morton's Avatar
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    so Td, did you come to a decision on the fan on top of the IC, I am to understand that it is a benefit when off road but restrictive on the highway, can anyone advise how it is restrictive & is it detrimental to the engine or just economy? I replaced my IC with a standard but welded version from Canberra for appx $420 exchange
    2002 3L GU Patrol, 2" lift, 33's, snorkel, dual battery, sliders, DVD, bluetooth

  2. #12
    How's the serenity boots's Avatar
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    Will find the invoice for my pwr performance IC John and let you know mate .
    The price of excellence is dicipline , the cost of mediocrity is dissapointment .

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    Patrol God threedogs's Avatar
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    @ Morton From what I've read the answer is no,
    @ Boots thanks mate, getting a blank hi flow core and going to Fab some end tanks to suit,
    Question now is ,is the boost sensor neccessary now I've NADDED my ride.
    If all goes well I'll be selling these and not for $1300, thats just robbery IMO
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  4. #14
    I am he, fear me the evil twin's Avatar
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    I usually have a 9 inch puller under my factory I/C. ATM it is not fitted as Nissan just put a new factory cooler on my truck.

    As posted by others I also noted that over about 40 ish KPH they make absolutely no noticeable difference. They are only really useful for low speed slogging but they certainly help then.

    If you are going to effort of mounting a fan I thoroughly recommend the small extra effort to mount it underneath.

    Mounting them on top they present a significant block to airflow at highway cruise as they sit up in the airflow coming in thru the scoop from the "side" of the fan so the blades and motor begin to block flow to the rear of the Intercooler. IE the airflow has to do a 90 degree turn on the top of the I/C but underneath the flow is much more laminar.

    Think of it this way... the trailing blade is going with the airflow (so little drag produced which is OK) but on the other side the leading blade is travelling into the airflow (significant drag/obstruction to airflow) so that side plus the motor body become an obstruction
    Dolphins are so smart that within a few weeks of captivity, they can train people to stand on the very edge of the pool and throw them fish.

  5. #15
    Patrol God threedogs's Avatar
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    So a 9" low profile will fit, I have the large bonnet scoop, thats 2 boxes ticked
    Do you set it to come on at speed/ temp what/how???? how is that part set up?? 9" fans cheap
    so might as well try

    @ Evil twin they say my bonnet scoops works at speeds down to 65 kph as opposed to 80 kph STD FYI
    Last edited by threedogs; 11th February 2013 at 12:47 PM.
    04 ST 3lt auto, not enough Mods to keep me happy, but getting there

  6. #16
    Hardcore macca86's Avatar
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    My fan is hard wired atm so is on when I start but not on the first click of the key. I also have a switch I could install in the cab as an on off but too lazy to do so
    Whoever appeals to the law against his fellow man is either a fool or a coward.
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  7. #17
    I am he, fear me the evil twin's Avatar
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    Quote Originally Posted by threedogs View Post
    So a 9" low profile will fit, I have the large bonnet scoop, thats 2 boxes ticked
    Do you set it to come on at speed/ temp what/how???? how is that part set up?? 9" fans cheap
    so might as well try

    @ Evil twin they say my bonnet scoops works at speeds down to 65 kph as opposed to 80 kph STD FYI
    9 inch slim fan def fits on the CRD not 100% sure on the Di's

    I just have a switch in the cabin for mine. If I hit the beach (the SW WA beaches are soft as....) or really soft tracks I turn it on and leave it on. Hit the formed tracks/gravel/bitumen et al then I turn it off.

    If you did want to have it set up automatically then the ideal IMHO would be speed and charge air temp delta T across the 'cooler.
    IE if below say 80 KPH or whatever and change in I/C inlet plenum air temp against outlet air plenum temp equals 'X" then it turns on.
    In reality that is probably a tad to sophisticated (and expensive) to set up.
    Soooo, for practicality I would lean towards a thermo switch for the outlet air plenum and a cabin override
    Dolphins are so smart that within a few weeks of captivity, they can train people to stand on the very edge of the pool and throw them fish.

  8. #18
    Smart like tractor Ben-e-boy's Avatar
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    Here you go TD some light reading for you

    http://www.are.com.au/index.html
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  9. #19
    The master farter mudski's Avatar
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    Don't waste your time TD. I will do F.A anyhow. The time it take for you to do it, you will only discover it was a waste of time. Only at low speeds it will help a little. But for high country hill climbing I reckon you wont even need it as being in low range there plenty of torgue ready to be used anyhow. Would be different if you sand driving though...

  10. #20
    Patrol God Sir Roofy's Avatar
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    Quote Originally Posted by mudski View Post
    don't waste your time td. I will do f.a anyhow. The time it take for you to do it, you will only discover it was a waste of time. Only at low speeds it will help a little. But for high country hill climbing i reckon you wont even need it as being in low range there plenty of torgue ready to be used anyhow. Would be different if you sand driving though...
    have to agree with mudski ive put an 8'' fan on ages ago and it does sfa,i dont even use it in the hills here
    or high country just been to lazy to take it off

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