1JZ Thermo CFM?

[HIZOKU]

I thought i would ask the question

i keep reading 1jz thermo fan flows more air then any thermo fan on the market

but im yet to see any CFM flow data searched via google and on this but could not find anything

[CrUZida]

If you are talking about the hydraulic fan found on JZA70's, JZ Aristo's, and most UZ's then yes, they are by far the best option on the market.

Able to be spun at almost full speed while idling, idle while your engine is doing high rpm, and only run fast enough to keep the engine cool.
This makes them superior to both electric fans and viscous coupled fans.
However they are also the most complicated and costly fans on the market.

Please note that note all JZ's had them (JZZ30's didn't, JZA80's didn't)

[HIZOKU]

im talking about the hydraulic fan.

But i can make a electric thermo do what ever i want to via my ECU (autronic) i can have the speed of it change from half speed full speed at all different point and even have it setup to idle at full speed at set temps

so in fact the hydro fan is just a good fan to how it works? not how much air it flows?

The reason im trying to find out the CFM rate was due to the above answer everyone says it is good but then everyone said a 1jz head flows better where that is not true. just trying to find out some facts so i can work out how im going to go about my cooling

Sorry if i come off mean not meaning to just trying to get my head around it all

[lexsmaz]

I cant give you a reading on the CFM of the viscous fan, but to me the main fault when people fit up after market electric fans is they usually dont run any form of a fan shroud cowling around the outside of the fan .. The shroud actually plays a large part in the effectiveness cooling of any good fan set up, so basically without a shroud set up the fan is just drawing air through the radiator where the fan is situated, instead of over the whole area of the radiator with a proper cowling / shroud, like a Factory set up has ..

[CrUZida]

The question makes sense.

The hydro fan is good in both the way it works, and the amount it flows.
Its very rare for an electric fan to beat a hydro fan, as the power in hydraulics far exceeds the capability of a small electric motor.

But unfortunately I don't have any CFM data for you.

[HIZOKU]

Thanks for the help guys so it all comes down to the shroud,

Reason for wanting to go elect was the fact the ECU can control it.
i got info from other sites in regards to some designs to shrouds and just gen setups.

http://powerhouseracing.com/Template...D=7&SearchYN=N

http://www.hrpworld.com/index.cfm?tp...action=product

the main reason behind wanting to know the CFM was to get somthing that could flow alot of air and with research on design im unsure if i will build out of fiberglass ot sheet metal, i already have a big HKS radiator so room is very tight as is with the hydro in place.

would love to find out the CFM but if cant oh well i have used this

How much airflow (cfm) do I need to cool my engine?

A four cylinder engine requires 1600 cfm; a six cylinder engine requires 2,000 cfm, a small V-8 engine requires 3,000 cfm and large V-8 engines require 4500+ cfm.

and guessing turbo motors would be 3000+ for somthing decent

http://www.perma-cool.com/Catalog/Cat_page16.html

These guys state on there website you do not need a shroud due to the way there fans mount/design.

But as everything im still researching trying to find out as much info as i can before i make the jump

[CrUZida]

If you want electric, I would ONLY use EL/AU/etc Falcon fans (or the Mondeo ones).

They come fully shrouded and will outflow pretty much every fan on the market (bar a few).
Piss easy to fit, and highly reliable.

But, from memory they are about 85mm deep at their thickest (or is it 70mm?? can't remember)

[mattysshop]

Comex, Spal, all seem to make 12" fans that support around the 2000cfm, they have the ordinary fans.. and these 'heavy duty' ones... davis craig, and cheaper ones all seem to be just as crap as eachother..

what sort of radiator are you using?? a decent fabricated radiator using a PWR close mesh core and one decent 12" fan would easily cool a 1JZ... those are the ones they run in V8 supercars..

[HIZOKU]

I currently run a Custom HKS Radiator alloy pretty thick alot bigger then my old KOYO alloy on my old evo

I was looking at the spal ones as i read good things about them on here and via a friend, i think two of them with a nice shroud should do wonders

any infomation on what the V8 supercars run?

Mind you this car is more for curcuit racing/drifting then anything and only time it is driven in traffic is out night or the odd occ the day but hardly

And the power output is currently at 300+kw but should be closer to 350 once i sort out the fuel system and a tune

[mattysshop]

the V8 super cars run fabricated PWR cores.. not sure on the dimensions, but they use the close mesh cores, which are on average 30% more efficient than normal open mesh of the same size/width etc...

i'll take some pics of the Gemini i'm helping with of a mates (Extreme Custom Engineering), he fabricated one for the 1JZ in it, and using a single 2820cfm 12" Comex fan... hasn't run it yet, but PWR swear by thier close mesh cores... and he has been using them ALOT latley... cars come in with super thick 3-4 core rad's with overheating problems, (example AC cobra replica)... leave with a single close mesh core IIRC there about 64mm but don't quote me on that.. and a couple of decent high output comex or spal fans.. problem solved...

[Admiral coFF33]

If you want electric, I would ONLY use EL/AU/etc Falcon fans (or the Mondeo ones).

They come fully shrouded and will outflow pretty much every fan on the market (bar a few).
Piss easy to fit, and highly reliable.

But, from memory they are about 85mm deep at their thickest (or is it 70mm?? can't remember)

100% can back this up
temps were a major issue in my JZZ20 drift car, AU thermos fixed it completely.
currently i run a custom triple core S13 alloy rad in my Z20 with the AU thermos.
My temps dont go above 90 on the track on a 30degree evening in perth.
And we arnt talking about racing where airflow can flow easy , we're talkin about sideways so the thermos are working the air most of the time , compared to flow/ram air being just pushed through.


My daily Z10 soarer also has these. (AU thermos) and on my aftermarket temp gauge. at 90degrees they turn on. and with in 1 minute my temps are at 76-80 deg.

worth every cent of their $120 price tag

[HIZOKU]

Thanks for the info there

Well this is the old jzx81 HKS built car dont have a issue with overheating yet but since im fixing alot of things well just refreashing i should say thought i would look into this

So twin thermos of EF=AU king or twin spal.davis craig, PWR ones will be fine

[mattysshop]

Davis craig are shit compared to the high output spal and comex...

PWR recommend Spal... Comex are usually the same, if not better cfm..

i'm not sure what CFM the falcon fans pull... but a single 12" dimple blade high output Comex does 2820cfm... if you can get two of those bad boys on there your set!!!

they arn't cheap, but definitly worth the $$... Comex are available at Ashdown-Ingram

http://www.ashdowningram.com.au

[HIZOKU]

Well i'm the type of person do it right the 1st time never have to touch it again

http://www.spalusa.com/store/main.as...&item=30102130 3168 CFM Rating

AU Copys

http://www.chrismillsperformance.com...id=30&vmcchk=1

I know there not real ones but the CFM rating is there 2,340 CFM if they do fine the spal ones should do ok i hope

BTW giving you all +1 Rep for your help and clearing a lot of things up that was doing my head in

[Shakotan_Aaron]

My daily Z10 soarer also has these. (AU thermos) and on my aftermarket temp gauge. at 90degrees they turn on. and with in 1 minute my temps are at 76-80 deg.

worth every cent of their $120 price tag

$120, where they used? new from ford? or new ebay ones....?

AU Copys

http://www.chrismillsperformance.com...id=30&vmcchk=1

I know there not real ones but the CFM rating is there 2,340 CFM if they do fine the spal ones should do ok i hope

thats 2340CFM together for both fans..? not even as much as a single Comex fan as mattysshop pointed out, doesn't say much for the blade design or motor strength, or it really says something about these other fans!

maybe try the ebay au fans ? cheaper then that other link you put up

http://shop.ebay.com.au/?_from=R40&_...All-Categories