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9/15/10 12:11am - Original Message: 'Electric fan kit dual vrs single on 68'
rlu1968
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Gordonvillle, TX - USA

Vette(s):
1968 Roadster 427

Joined: 11/28/2003
Posts: 222
Thinking about going with an elect. fan on my 68 350 hp. No air cond. to keep it cooler. and to cool the engine compartment after the engine is shut down. (heat  soak and vapor lock problems)  
Should I go with the dual fans or single fan. Duel 11" or single 16". 
Is the Aluminum radiators wih fan kit even a better way to go. Looking towards the Dewitts but are there others out there that will do a better job. 
thanks for any info.
Richard
 


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9/15/10 11:22am - Reply: 'Electric fan kit dual vrs single on 68'
MikeMc71
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Tucson, AZ - USA

Vette(s):
1970 White L-46 Air Roadster, 1971 White LT1 Coupe, 1971 Red Auto Air Coupe, 383 stroker, 430 HP, 2002 Millennium Yellow Auto Coupe

Joined: 10/7/2007
Posts: 341
I really like the Dewitts, I have the dual spal fans on my 71 383 stroker, the fans work well. You really should not have a problem keeping a stock engine cool with the standard set-up though. My dual fans shut off when the ignition is shut off, so I am not sure that would be the way to go to cool the engine compartment after you shut down. If vapor lock is a problem, I would look at the fuel lines themselves, a litte heat wrap is a lot cheaper then those fans, believe me.

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9/15/10 11:32am - Reply: 'Electric fan kit dual vrs single on 68'
VetteSpecialties
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Mounds View, MN - USA

Vette(s):
70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe

Joined: 5/24/2007
Posts: 1031
It is not the number or size that matters, it is how much air they flow.   I always say get the most CFM of air flow possible, especially in Texas.   So compare air flow data, and buy the best.  And you can wire it to run only with the key on, or whenever the engine is hot.

The aluminum radiators usually cool more, not because they are aluminum, but because they have more surface area of fins and tubes. 

Larry


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9/15/10 11:39am - Reply: 'Electric fan kit dual vrs single on 68'
yostusota
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York, PA - USA

Vette(s):
1969 daytona conv. all original 350 350 380 4 sp w/air..and hard top

Joined: 5/18/2010
Posts: 1518
There is a way to wire a temp sensor in the relay ground side that will automatically turn on the fans at a certain temp even if the engine is shut off..obviously this is mounted in the radiator and not the block..so you use 2 sensors..one in the block or thermostat housing. Sounds like a heavy heat wave down your way..
Rich

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9/15/10 2:50pm - Reply: 'Electric fan kit dual vrs single on 68'
rlu1968
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Gordonvillle, TX - USA

Vette(s):
1968 Roadster 427

Joined: 11/28/2003
Posts: 222
Lately it has been real nice in the lower 90's.
I will check and compare the cfm's before I buy one. But I guess I am limited to the corvette suppply place, and what they have. I want it to fit properly, and not too much of a hassle to install the wiring.   
My fuel lines are all thermo coated wraped but it has not solved the heat soak and vapor problems. I have to just get the heat down in the engine compartment. 


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9/16/10 8:16am - Reply: 'Electric fan kit dual vrs single on 68'
lukesvette Lifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
Posts: 6804
I have dual Flex-o-lite fans that are in their own shround that fits almost like a factory set up on a C3 radiator. Aluminum radiator with 2 1" tubes running through it and temp sensor on the water passage on the intake. 180 stat and sensor - car did not get above 180 on the hottest days...

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9/16/10 9:14am - Reply: 'Electric fan kit dual vrs single on 68'
yostusota
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York, PA - USA

Vette(s):
1969 daytona conv. all original 350 350 380 4 sp w/air..and hard top

Joined: 5/18/2010
Posts: 1518
Yup..that's thee setup..with a temp sensor not in the block..for the fan operation. It will run cooler with the sensor in the lower radiator area..heat rises..awesome setup.
Rich

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9/16/10 10:47am - Reply: 'Electric fan kit dual vrs single on 68'
yostusota
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York, PA - USA

Vette(s):
1969 daytona conv. all original 350 350 380 4 sp w/air..and hard top

Joined: 5/18/2010
Posts: 1518
I forgot one thing..if you still have the factory alternator with the external regulator you will need to upgrade to a internal style with a 80 amp or so..the fan manufacturer would know the fan amp draw and will tell you how much you need..easy swap though..
Rich

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9/16/10 10:58am - Reply: 'Electric fan kit dual vrs single on 68'
rlu1968
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Gordonvillle, TX - USA

Vette(s):
1968 Roadster 427

Joined: 11/28/2003
Posts: 222
Great, I didn't think about the alternator. 
Richard


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9/16/10 11:31am - Reply: 'Electric fan kit dual vrs single on 68'
MikeMc71
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Tucson, AZ - USA

Vette(s):
1970 White L-46 Air Roadster, 1971 White LT1 Coupe, 1971 Red Auto Air Coupe, 383 stroker, 430 HP, 2002 Millennium Yellow Auto Coupe

Joined: 10/7/2007
Posts: 341
Be careful wiring that so it will run with the key off. Here in Tucson I have had them start on cars just parked outside, and run the battery completely dry. The weather down here is a little different that up North! Thumbs Up

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9/16/10 11:33am - Reply: 'Electric fan kit dual vrs single on 68'
lukesvette Lifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
Posts: 6804
I bumped up to a 95 AMP alt. Also ran an 8 Ga wire from that battery leg off the alternator to a junction box with the hot battery cable to handle the extra amperage that was cooking the factory alt wiring. The flexolite fans pull considerably low amperage compared to some of the other manufacturers. I think this is the unit I installed:
 
 
 


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9/16/10 3:21pm - Reply: 'Electric fan kit dual vrs single on 68'
rlu1968
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Gordonvillle, TX - USA

Vette(s):
1968 Roadster 427

Joined: 11/28/2003
Posts: 222
So you must have got the 400-420 puller type. Were you able to keep your factory shroud. Or did you just take it all off and mount it to the radiator. Any special brackets or did it have a correct fit. 
Richard


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9/17/10 1:44am - Reply: 'Electric fan kit dual vrs single on 68'
lukesvette Lifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
Posts: 6804
Factory Shroud removed and mounted to the radiator - actually has a soft seal that works nicely. Comes with adjustable brackets for the top and they lined up with the factory shroud mounts. On the bottom I used the pull through the rad zip tie mounts with the discs and bushings... Very sturdy...

lukesvette2010-09-16 22:46:19

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