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How much fan is needed for boosted+ac car?

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Old Feb 4, 2014 | 09:49 PM
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Default How much fan is needed for boosted+ac car?

So trying to decide on some fans. After searching for hours I haven't found any good info on a set up that works!

Looking for pullers only. Using a stand up griffin rad. Was looking into single fans to purchase 2 and make a sheet metal shroud. Needs to under roughly 3.5" thick.

Looked these options so far.
Derale http://www.summitracing.com/parts/der-18214/overview/

Spal http://www.summitracing.com/parts/sp...2157/overview/

Perma cool http://www.summitracing.com/parts/prm-19122/overview/
^these seem like a good option but hard to believe the price/cfm/quality?


Looking for some real world advice on what it takes. Need to make an order ASAP and would rather only buy one set and do it right the first time!
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Old Feb 4, 2014 | 11:06 PM
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This is what you need fits a griffin like a glove and is pretty slim, takes care of the shroud problem and is much cheaper.

http://www.ebay.com/itm/NEW-95-00-CONTOUR-MYSTIQUE-V6-RADIATOR-A-C-CONDITIONING-CONDENSER-DUAL-FAN-MOTOR-/360851498363?pt=Motors_Car_Truck_Parts_Accessories&fits=Model%3AContour&hash=item54046ce57b&vxp=mtr
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Old Feb 5, 2014 | 09:55 AM
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I was looking into some oem fans. Those look a little thicker tho. I need something roughly 3.5" at most. Was thinking about trying to make two 12" fans fit on the typical griffin rad.
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Old Feb 5, 2014 | 10:42 AM
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Twins with AC here, stock radiator and fans. No issues in 100°+ weather in the summer in stop and go traffic.
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Old Feb 5, 2014 | 12:04 PM
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I use the stock fans on my Griffin, but you obviously need something smaller.

Preston, are you running those fans on your TA? Do they only have the one plug or is there one on the other fan motor as well? Might switch to them this year for a better shroud effect if they work well with the stock wiring.
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Old Feb 5, 2014 | 12:20 PM
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Ya I tried to trim the stock fans to check fitment. No way the pt88 is going to fit using the stockers. I'm thinking about getting a Taurus fan and making a shroud. I think I will have enough room since my turbo will be set off to the side pretty good.
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Old Feb 7, 2014 | 08:26 PM
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Both fans have there own plug you can purchase them off of ebay or pull them out of a salvage yard and cut them off the harness. The plug on top was for a temp sensor, you can wire them to run off your stock. My car hung out around 175 even on the hot days in traffic down in south carolina. You have to trim the upper left corner to get them to fit Sorry the cars dirty been down for about 18 months and I just started fresh build. Just set the rad in so you guys can see how well they fit.

Measured them and they stick out 2 7/8" past the core support.

[IMG][/IMG]

[IMG][/IMG]

[IMG][/IMG]

Last edited by Preston99WS6; Feb 7, 2014 at 08:32 PM.
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Old Feb 7, 2014 | 08:37 PM
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I have the thin griffin radiator that everyone runs with the derale bad boy pushers that everyone runs. My condenser is in front of the radiator, then the fans. In the summer time with any temp above 90 degrees running ac is not an option since coolant temps rise and keep going up. No ac on the coolant temp will rise about a degree a mile on the freeway. I have purchased a retired nascar radiator and about to do a write up on this gynormous monster of a radiator. I will have to cut the frame rails a little and do some custom fabbing to get it to fit, but once done I dont think cooling will ever be a problem. The size and amount of coolant this thing has is insane. I want over kill on the cooling system. I will make a thread once I get going on this thing.
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Old Feb 8, 2014 | 11:34 AM
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Any Idea how many CFM those fans pull? Oh, what the dimensions are on them? Im not an FBody guy so not sure what Griffin rad everyone is using...

I need a set of fans that are capable of doing all the work. No forced airflow from anything except the fans...
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Old Feb 8, 2014 | 06:58 PM
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Originally Posted by JAX04
Any Idea how many CFM those fans pull? Oh, what the dimensions are on them?
The contour fans are great units and outflow just about everything on the market. Ill get the measurements off of mine for you and post it up later tonight got to hunt down my tape measure.

Here is a a comparison I found off of YellowBullet.


LS1 fans and shroud
LT1 fans and shroud
A 1999 Dodge stratus fans and shroud.
1996 Ford Taurus/Contour Fans and shroud


First off they were ALL tested at Battery voltage (12.5v)
first and then with my truck running with a 30ft 4 gauge wire from my battery 14.5v

Not the exact numbers they fluctuate from 150 to 250 cfm this is an average

Battery operated

LS1 FAN SHROUD
1 fan turned on - 4800 cfm
2 fans on - 9500cfm

LT1 FAN SHROUD
1 fan turned on - 5000 cfm
2 fans on - 8700 cfm

Dodge Fan (both fans are always on - 2 speed)
Slow speed - 3700 cfm
High Speed 9000 cfm

Ford Taurus/Contour fans and shroud
Flowrate with 1 fan
Slow speed - 2800 CFM
High speed - 5600 CFM
Flowrate with 2 fans
Slow speed - 5500 CFM
High speed - 11000 CFM

Alternator Powered
14.4 V

LS1 FAN SHROUD
1 fan turned on - 5100 cfm
2 fans on - 10500cfm

LT1 FAN SHROUD
1 fan turned on - 5200 cfm
2 fans on - 9500 cfm

Dodge Fan (both fans are always on - 2 speed)
Slow speed - 4200 cfm
High Speed 10400 cfm

Ford Taurus/Contour fan shroud
Flowrate with 1 fan
Slow speed - 3200 CFM
High speed - 6000 CFM
Flowrate with 2 fans
Slow speed- 6100 CFM
High speed - 11800 CFM

Last edited by Preston99WS6; Feb 9, 2014 at 04:06 PM.
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Old Feb 8, 2014 | 07:04 PM
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They seem to be some pretty bad *** fans man!

I think, as long as they fit, i just found the new fans for my car.

Thanks man! Def look forward to the overall dimensions.
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Old Feb 8, 2014 | 07:13 PM
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Just found this on the Google device

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Old Feb 8, 2014 | 07:23 PM
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I thought the popular Taurus fan was the single fan from a 3.8 Taurus?

Preston which fans are mounted in on the ta in the pic? Dual Taurus fans?
Can't believe they pull that much cfm

Last edited by kylemm1002; Feb 8, 2014 at 07:49 PM.
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Old Feb 8, 2014 | 07:24 PM
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Here is the wiring diagram

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Old Feb 8, 2014 | 07:28 PM
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I believe those are the taurus/countour fan that Preston posted above on the Laser red mustang as well.

Judging by that diagram, im gonna use them for my ride

Preston, thanks for posting them up man. Couple questions since you've used them

Relays, how many and how big?
What size power wire are you running?
How many amps do they draw? Ties into first question.


thanks again!
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Old Feb 8, 2014 | 07:30 PM
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Haha, we posted same time. What size are those resistors and relays?
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Old Feb 8, 2014 | 07:35 PM
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Originally Posted by kylemm1002
I thought the popular Taurus fan was the single fan from a 3.8 Taurus?

Jax04 which fans are mounted in on the ta in the pic? Dual Taurus fans?
Can't believe they pull that much cfm
Those are the Contour V6 version dual fan that are mounted in the pics of my car (Contour V6 fan is what I typed into the ebay search bar). I posted a link to some new replacement ones on ebay above. You can find a used set for around 65 dollars that's what I paid for mine. As far as flowrates they are just as large as the LS1 fans but are not as thick and have heavier duty motors. These are 2 fans/shroud and a 2 speed setup allowing for double temp settings and a slow start option to reduce current drawn on start up. They are a nice piece. If you put your turbo in the right spot you should be able to flip the fans the other direction and you can center the shroud up better then I could. I'm pretty sure my S480 has larger dimensions and the way I have them in the picture is the only way I could get them to fit.
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Old Feb 8, 2014 | 07:41 PM
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U managed to fit a s480 in that spot with the fans? I just went out and held my pt88 in the location I want it and there is no way unless I can mount it high enough to on the passenger side to have the larger part of the fan actually under the turbo...(not sure if that makes sense) but the passenger fan is lower then the driver...

Any pics of te turbo mounted by chance? Btw thanks for all he info!
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Old Feb 8, 2014 | 07:51 PM
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I pulled that diagram off of google.

I wired mine to run on high speed only so I bypassed the resistor. The resistor comes as part of the fan its the plug in the bottom left corner of the pic FYI. Its only purpose is to limit starting current and operate the fans in slow speed.

I installed a 70A relay triggered from the stock ECU power wire going to the stock fans. I also put a toggle switch in here as well so I could turn it on to cool the car in the pits after a pass.
I used a 60A inline fuse.
8 gauge wire
I never measured the current draw though. But the stock alternator had no trouble keeping up with these and both 255's running.

Not my picture, this is the stock wiring.
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Last edited by Preston99WS6; Feb 8, 2014 at 07:59 PM.
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Old Feb 8, 2014 | 07:56 PM
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Excellent stuff man. Looks like im headed to the scrapyard this week!

Thanks again man!
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