View Poll Results: which fan are you using/happy with
electric fans
14
43.75%
stocker clutch fan
18
56.25%
Voters: 32. You may not vote on this poll
clutch fan or electric fan???
i have.
11-03-13, 06:21 PM
#22
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Location: pa
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what a tool
I'm running electric fans but it's only to clear up the clutter up front so my chrome pullies are not being blocked.
I also only drive my car about 4-5 times a month..
IMO, nothing cools better than OEM so if you're looking for the best cooling option, I would say to keep your Fan Clutch. That's just my $.02..
I also only drive my car about 4-5 times a month..IMO, nothing cools better than OEM so if you're looking for the best cooling option, I would say to keep your Fan Clutch. That's just my $.02..
07-21-15, 09:04 PM
#25
For reference. Some info I pulled off of Supraforums a couple years ago.
2JZ-GTE clutchfan pulls 3600cfm at 1800rpm. At that rpm the fan clutch slips so that cfm is constant from that rpm up.
2JZ-GE clutchfan pulls 3300cfm at supposedly the same rpm. Differences in the cfm is due to the different shapes of the GE and GTE blades
So if anyone is considering electric fans, the idea is to get a similar cfm.
2JZ-GTE clutchfan pulls 3600cfm at 1800rpm. At that rpm the fan clutch slips so that cfm is constant from that rpm up.
2JZ-GE clutchfan pulls 3300cfm at supposedly the same rpm. Differences in the cfm is due to the different shapes of the GE and GTE blades
So if anyone is considering electric fans, the idea is to get a similar cfm.
Last edited by 1997Soarer; 07-21-15 at 09:15 PM.
07-26-15, 06:45 PM
#26
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Mechanical fan clutches eat up enough horsepower to make a real difference on a 100 hp car. Not so much, on a 300 hp car. Also, Volvo fans are bada and look great in my experience.
07-27-15, 03:37 AM
#27
Is300 fan setup with phr aluminum shroud controlled with relays either using 2 temp probes for on off temps or completely controlled by ECU ,problem solved... in all the years I've been working on Lexus cars , I have yet to see these fans fail ..they flow more cfm then fan clutch setup.. if car is boosted and running multiple pumps , gauges, you will need to upgrade alternator and associated wiring... dexlex has this setup in his 800hp ish supra and I have watched via pro efi can -bus gauge temps drop 15 degrees within seconds when fan went on
I have same setup ready to install to rid myself of the ugly power robbing clutch setup, I am also using a mechman 170 amp alternator with phr alternator rewire kit, also buy the fans off eBay and get 2 of the 5 blades .. usually find them for less the 75 each and if you don't want to spend the money for phr shroud ,use the OEM shroud , with slight modification, will mount to your radiator .. I have one already modified can sell for cheap as I have the phr shroud already
I have same setup ready to install to rid myself of the ugly power robbing clutch setup, I am also using a mechman 170 amp alternator with phr alternator rewire kit, also buy the fans off eBay and get 2 of the 5 blades .. usually find them for less the 75 each and if you don't want to spend the money for phr shroud ,use the OEM shroud , with slight modification, will mount to your radiator .. I have one already modified can sell for cheap as I have the phr shroud already
Last edited by lexforlife; 07-27-15 at 03:45 AM.
12-22-16, 12:15 PM
#30
Moderator
Belt driven has no gearing ... due to fan clutch, based on ram effect the fan can float and spin faster when your vehicle is traveling fast [other wise it would start to restrict the flow in the shroud]. Also engine (really fan position) in the shroud becomes critical. SC has a long nose and the space between the radiator and the engine block is quite a bit.
Electric set up is typically by 2 fans, where the second kicks in when there is additional demand on cooling. Electrical motors do tend to produce electrical noise, which can be picked up by the audio system.
Hydraulic in SC provides gearing (2 speed) with no electrical noise and the spacing is not an issue.
My humble guess is that Lexus engineers decoupled the position of the engine and locating the fan in the middle by going hydraulic and enjoy the benefit of gearing (2 speed) and no electrical noise.
Salim
Electric set up is typically by 2 fans, where the second kicks in when there is additional demand on cooling. Electrical motors do tend to produce electrical noise, which can be picked up by the audio system.
Hydraulic in SC provides gearing (2 speed) with no electrical noise and the spacing is not an issue.
My humble guess is that Lexus engineers decoupled the position of the engine and locating the fan in the middle by going hydraulic and enjoy the benefit of gearing (2 speed) and no electrical noise.
Salim
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