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Location:
Perth
Registered:
October 2003
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1JZ Cooling Fan
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Fri, 14 November 2003 07:46
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Im having clearance issues with my conversion, the large 17" diameter standard cooling fan is fouling. I need a fan with dimension less than 14". Is there any other Toyota OEM fan/fan clutch that will suit? The flange is 92mm diameter, 4 holes on 74mm PCD, spigot dia. 15.9mm and spigot length 8.8mm. Maybe I will just find one with similar spigot size and redrill PCD on pulley to suit.
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Registered:
March 2003
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Re: 1JZ Cooling Fan
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Fri, 14 November 2003 09:54
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Why not go with Thermo fans?
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Location:
Perth
Registered:
October 2003
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Re: 1JZ Cooling Fan
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Fri, 14 November 2003 13:02
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Just went and had a look at the pulley again and realised I cant redrill it to a smaller diameter. The holes are on the inner edge as it is.
Danish: Thermo fans are cr@p compared to clutch fans, I have had bad experiences with them in the past with copper radiators, this time I have an aluminium one so i may not be on the cooling borderline as much. In the end they may be my only choice, I suppose this time an advantage is that my Haltech will control them. Will go to a few wreckers next week and see if i can find a clutch fan setup to suit.
Has anyone ever cut the blades down on a standard plastic fan? If so what were the results? I will need to take at least 40mm off each blade.
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Registered:
March 2003
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Re: 1JZ Cooling Fan
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Fri, 14 November 2003 13:09
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My electric fans are working great! 
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Location:
Brisbane
Registered:
May 2002
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Re: 1JZ Cooling Fan
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Fri, 14 November 2003 14:29
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I have electric fans as well, and they're doing a great job keeping my 2JZ cool. I was towing a dual-axle trailer full of crap the other day and had no worries with overheating. Having a good radiator makes all the difference.
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Location:
Perth
Registered:
October 2003
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Re: 1JZ Cooling Fan
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Sat, 15 November 2003 12:21
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Ive got a 60mm thick 530x430 (overall) 2 row crossflowing aluminium unit, cost an arm and a leg  . Looks like ill go for thermos then, I will completely shroud the rear in with aluminium and mount the thermo(s) on the shroud drawing the air through. To be honest the standard 1JZ fan is in a ridiculous position anyway, it's no where near the centre of the radiator. If all goes well ill be up and running next weekend
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Location:
Brisbane
Registered:
February 2003
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Re: 1JZ Cooling Fan
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Sat, 15 November 2003 16:02
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| Skip wrote on Fri, 14 November 2003 23:02 |
<snip>Will go to a few wreckers next week and see if i can find a clutch fan setup to suit.
Has anyone ever cut the blades down on a standard plastic fan? If so what were the results? I will need to take at least 40mm off each blade.
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fwiw, the clutch/viscous hub for my RA40 started to fail (had plenty of drag to shift fan but rotated easily with engine off at high temps) - resulting in overheating under any load (and this is with a copper radiator - just 12months out from a proper flush). Replaced the hub and is now holding temps in brisbane heat.
i think that the fan performance is so closely linked to hub performance (e.g. if either begins to fail, cooling performance suffers significantly), that if you removed so much blade length, you wont shift enough air - and temps under load or low-road-speed will rise significantly. You might also not have enough drag on the hub for it to lockup properely,
i think a bunch of thermos would suit you better - several small 10-12" blowing thru, and the larger 14" inside mounted in a custom shroud. Can you take a few pics of the shroud before/after mounting?
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Location:
Sydney
Registered:
May 2002
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Re: 1JZ Cooling Fan
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Sun, 16 November 2003 13:22
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i ditched my 1j hydrolic set up and put 2 v6 magna thermo's i put em sideways (shrouded) they are great... only take up a very small amount of space to...
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Location:
Perth
Registered:
October 2003
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Re: 1JZ Cooling Fan
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Sun, 16 November 2003 23:41
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It is much better to fit a big single than 2 smaller fans. Youll find a single 16" will move a fair bit more air than 2 12". Does anyone know of any good brands besides Davies Craig? A 16" davies craig is about $350 
BTW what are the overall dimensions of the AU fans and shroud, and do you buy them new from Ford spare parts? If someone has a pic please post it.
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: 1JZ Cooling Fan
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Mon, 17 November 2003 05:55
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I bought it from a late model ford & holden wreckers, brand new in the box with warantee - ford wanted $300+
I'll get a pic if I can - at a guess I'd say it's twin 13s
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Location:
Brisbane
Registered:
June 2003
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Re: 1JZ Cooling Fan
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Mon, 17 November 2003 06:31
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Just go thermos mate! Im using them on my car. I wouldnt spend 10k + on an engine to then go tight on something as important as cooling. I upgraded from the ma61 radiator and 16' clutch fan to:
660w x 520h x 80mm thick 4-core chev radiator with HUGE tanks. ($250 like new)
one 14" GT4 Fan
one 13" GT4 Fan. (gt4 fans $100 from shane)
and a 12" davies craig a/c fan. (Free from auto elec i know)
So all up max my cooling system would cost anyone on here about $500...well worth it to be certain you have the best keeping your engine cool.
I cant see a clutch fan keeping my car anywhere near as cool as these on a hot summer day in traffic with aircon on.
Blake.
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Location:
Perth
Registered:
October 2003
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Re: 1JZ Cooling Fan
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Mon, 17 November 2003 07:57
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Yeah pity I cant get a radiator in that big, thats the problem when putting a 6 cylinder in where a 4 cylinder used to live. It's overall dimensions are 530x430x57, being all aluminium it will be pretty efficient though. Im not going tight on anything on the conversion, tis the reason I have an aluminium radiator and wanted to get the system right. There is nothing worse than a car with cooling problems, I used to own one
Thats one mighty radiator you have, have you got any shrouding? Shrouding is very important to cooling performance.
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Location:
Brisbane
Registered:
June 2003
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Location:
Sydney
Registered:
May 2002
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Re: 1JZ Cooling Fan
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Mon, 17 November 2003 12:51
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got my set for $50
wiring, switch, relay and conectors ohh and thermofan mounts aprox $30
me ripping a massive hole in my new radiator when putting it together....Pricless 
well actually cost me another $400 (the guy felt sorry for me  )
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Location:
Sydney
Registered:
May 2002
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Re: 1JZ Cooling Fan
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Mon, 17 November 2003 12:53
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ps this turned out to be a really good setup perfect fit over the cressi radiator i'll post a pic in a few days...
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: 1JZ Cooling Fan
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Mon, 17 November 2003 13:04
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how did you manage that?
I feel your pain Im going to take extra special care when putting mine together now
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Location:
Perth
Registered:
October 2003
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Re: 1JZ Cooling Fan
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Tue, 18 November 2003 00:07
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V8_MA61: You dont need shrouding cause your radiator is so f#*king big  .
Remember if a fan is just bolted on it will only pull air through that area of the radiator. Also if there is a gap between the radiator and thermo shroud alot of air will go through the gap and hence not get sucked through the radiator core. Air will always try and find the easiest path to move!!!! BTW im talking pulling air from the back, not pushing it from the front. Ideally you should totally shroud the rear of the radiator, like box it all in then put the thermo on the shroud which covers the entire core, therefore pulling air through every section of the radiator. However if this box doesnt stand far enough out, usually 1.5 times the thickness of the core is enough, you will create bad pressure differences or dead spots and it will not work properly.
When my setup is finished ill put some piccies up, im looking at aluminium at the moment, but if i get real trick ill make a carbon fibre one. 
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Location:
Brisbane
Registered:
June 2003
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Re: 1JZ Cooling Fan
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Tue, 18 November 2003 07:52
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have you ever seen gt4 fans? They are shrouded properly. Both of mine cover the full radiator.
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